Despite the remarkable promise of MOFs, their adoption beyond laboratory environments has been stymied by challenges in scaling up production. While the fundamental chemistry behind MOFs has been well-established for over two decades, transitioning from bench-scale synthesis to industrial manufacturing remains a formidable hurdle. This disconnect arises from factors including complex manufacturing processes, unpredictable costs, and operational considerations like solvent management and waste disposal. Notably, these complexities have limited MOFs’ use to primarily scientific investigations or niche applications.

Amid this backdrop, Dr. Samy Yousef from Kaunas University of Technology has conducted pioneering research focused on the techno-economic feasibility of producing MOFs at an industrial scale. His work rigorously assesses how to bridge the gap between scientific innovation and practical deployment of these advanced materials. By leveraging commercially available industrial equipment and meticulously evaluating each production step—from raw material acquisition to energy consumption and labor costs—Dr. Yousef’s research offers a realistic blueprint for industrial MOF manufacturing within the existing economic and regulatory frameworks.

Central to this inquiry is the recognition that laboratory-scale MOF production often overlooks critical industrial factors, including the management of secondary waste, effective solvent recycling, and ensuring material stability over prolonged use. Addressing these challenges, the research proposes integrated production lines designed for continuous and efficient synthesis, enabling higher output and consistent quality. The techno-economic models developed predict that depending on the chosen synthesis route, investment in such production infrastructure could be recouped in a relatively short timeframe, suggesting robust commercial viability.

The practical implications of scaling up MOF production are far-reaching. As these materials transition into industrial quantities—projected to reach several tonnes annually—MOFs could integrate into everyday technologies that enhance environmental sustainability. For instance, they might be embedded within air purification systems, HVAC units, or water filtration devices, where their extensive surface area and selective adsorption capacities enable effective removal of pollutants at the molecular level. Such applications would likely position MOFs as vital yet invisible components improving the efficiency and environmental footprint of commonplace devices.

Beyond environmental frameworks, the unique structural and chemical tunability of MOFs positions them as promising candidates across diverse technological fields. Their ability to function as platforms for controlled drug delivery opens avenues in biomedical research, while their molecular filtering capabilities may advance optical sensing and antioxidant technologies. These multifaceted functionalities underscore why MOFs continue to be a focal point of intensive scientific research, further intensified by the 2025 Nobel Prize in Chemistry awarded for MOF development.

One particularly compelling aspect of Dr. Yousef’s study is its incorporation of holistic economic assessments tailored to Lithuania’s market conditions. By analyzing variables such as raw material costs, chemical usage, power demands, and workforce expenses within a real-world legal and economic context, the study transcends theoretical speculation. It lays out a pragmatic pathway toward the commercialization of MOFs, which could serve as a model for other regions aiming to harness these materials on an industrial scale.

The technological challenges inherent in scaling MOF production also include maintaining the extraordinary precision of their molecular architectures. Industrial processes must safeguard the crystalline order and pore homogeneity that confer MOFs their unique selectivity and adsorption properties. Achieving such consistency demands not only optimized equipment and synthesis protocols but also stringent quality control measures throughout the manufacturing cycle.

As the synthesis methods evolve from batch processes to potentially continuous production lines, solvent regeneration and waste minimization emerge as critical components. The environmental sustainability of MOF manufacturing hinges on these factors, ensuring that the broader ecological benefits of MOF applications are not offset by production-related pollution or excessive resource consumption. Dr. Yousef’s research advocates for technological innovations in process integration and recycling that could position MOFs as truly green materials, from synthesis to end-use.

Looking toward the near future, it is plausible that MOFs will become ubiquitous albeit inconspicuously embedded within various consumer and industrial products. Their presence behind the scenes in air filtration units or water treatment systems could fundamentally enhance public health outcomes by decreasing exposure to hazardous airborne and waterborne contaminants. Such an outcome would mark a significant leap in environmental technology, powered by the confluence of advanced materials science and scalable manufacturing processes.

In sum, the advancement of MOF production from laboratory novelty to industrial mainstay promises to unlock transformative applications addressing some of the most pressing environmental and technological challenges. The work of Dr. Samy Yousef at Kaunas University of Technology illuminates a viable pathway to this future, demonstrating that with thoughtful process design and economic foresight, the exceptional properties of MOFs can be harnessed at scale. As these materials begin to permeate daily life, they hold the potential to catalyze a new era of sustainable innovation, where scientific ingenuity translates directly into tangible environmental benefits.

Subject of Research: Techno-economic analysis of industrial-scale production of metal–organic frameworks (MOFs) for environmental and technological applications.

Article Title: Techno-economic assessment of scale-up of metal-organic framework production

News Publication Date: 25-Nov-2025

Web References: ScienceDirect Article

References: DOI: 10.1016/j.jics.2025.102316

Image Credits: Kaunas University of Technology (KTU)

Keywords: Metal–organic frameworks, MOFs, industrial scale-up, environmental technology, carbon capture, wastewater treatment, porous materials, techno-economic assessment, sustainable manufacturing, air purification, material science innovation

The core of this research lies in understanding how murals, especially those erected during Kaunas’ tenure as the European Capital of Culture, transcend simple aesthetic appeal. Professors Saulutė Juzelėnienė and Saulė Petronienė, leading scholars in this field, argue convincingly that these murals act as potent cultural activism tools that invoke a shared sense of history and identity among residents. By carefully blending multiple languages, historical symbols, and visual narratives, these street artworks reconfigure the spatial experience of the city, enriching both residents’ and visitors’ interactions with their environment.

One significant aspect unearthed by the study is the ability of certain murals—such as those found in Ramybės Park, Mickevičius Street, and the Kiemas Gallery—to serve as sites of remembrance for painful historical episodes like the Holocaust and mass deportations. These artworks function as mediators of collective memory, enabling individuals to engage emotionally and intellectually with the past without reducing history to oversimplified narratives. According to Professor Juzelėnienė, the emotional depth imbued in these murals opens up a vital space for reflection and education, which is crucial for societies grappling with dark historical chapters.

Kaunas’ distinctive cultural identity is heavily anchored in its historical multiculturalism, a theme underscored by Professor Petronienė. While largely perceived as one of Lithuania’s most ethnically homogeneous cities, Kaunas historically hosted diverse communities including Jews, Poles, Russians, and Germans. The murals capture this pluralistic heritage, embodying the city’s layered past and fostering a nuanced understanding of its social fabric. This artistic representation aligns with the broader theoretical framework of the linguistic landscape, which situates language use within specific local contexts through visible public signs, inscriptions, and, critically, visual symbols and colors.

This research emphasizes the importance of preserving historical consciousness in the face of contemporary geopolitical uncertainties. Professor Petronienė highlights how murals operate as accessible and effective conduits of historical awareness, ensuring that stories—both celebrated and painful—are not lost to the passage of time. By embedding these narratives into the urban environment, murals contribute to a cultural ecosystem that resists forgetting and actively engages citizens in a continuous process of collective remembrance.

Beyond their memorial function, murals in Kaunas represent a dynamic form of cultural activism. The KTU study reveals that the artwork stirs collective pride and curiosity, prompting viewers to immerse themselves more deeply in the city’s multifaceted history. This street art operates subtly yet powerfully in everyday life, inviting interaction and dialogue among diverse audiences. Professor Juzelėnienė notes that such engagement fosters a participatory history that is lived and experienced communally, fundamentally transforming residents’ relationships with their urban surroundings.

The genesis of this scholarly interest in Kaunas’ murals is, intriguingly, rooted in Professor Juzelėnienė’s personal connection to the Kiemas Gallery, where her family resides. Initial murals commemorating Jewish victims of the Holocaust spurred her to harness her expertise in international project coordination to expand this cultural initiative. This hands-on involvement exemplifies how academic inquiry and civic activism intersect, producing environments where art and memory coexist dynamically to breathe new life into public spaces.

From an urban development perspective, these murals act as catalysts for social cohesion and community revitalization. KTU researchers have established through comparative European studies—such as those examining post-industrial cities like Herlen in the Netherlands—that mural projects often galvanize local populations, fostering increased social participation well beyond the creative process itself. This case parallels transformations seen in cities like Belfast, where politically charged murals narrate the complexities of the Troubles, illustrating how wall paintings can become interactive channels of communication in contested spaces.

The communicative potential of murals is further underscored by interviews with the artists involved. These creators view their work as ongoing social actions rather than static artworks, emphasizing the evolving dialogue between the art, its surroundings, and the people who engage with it. Professor Juzelėnienė explains that this processual nature ensures murals remain alive within community memory, extending their influence indefinitely as participants continuously reinterpret their meanings across time.

While the murals central to this study are predominantly located in official cultural areas of Kaunas, the researchers recognize the existence of alternative or protest-oriented street art outside these zones. Such diversity enriches the city’s linguistic landscape, incorporating both institutional narratives and grassroots expressions that together paint a complex cultural portrait. This multiplicity of voices is essential to capturing authentic urban identities that resist homogenization.

One notable insight of the study is the counterargument against the notion that institutional involvement compromises mural authenticity. Rather than stifling creativity, official patronage has facilitated the resurfacing of silenced histories and marginalized stories. This has significant implications for how cities can leverage public art policy to nurture inclusive cultural memories, empowering younger generations unfamiliar with nuanced historical contexts to engage critically with their heritage.

Ultimately, KTU researchers argue that multilingual murals function not only as bearers of historical narratives but also as vibrant, living archives that stimulate inquiry, discourse, and emotional resonance. These artworks contribute to an urban linguistic ecology where language, visuals, and space intersect to create meaningful cultural dialogues. By highlighting the dynamic intersections between artistic expression and linguistic geography, the study opens new pathways for interdisciplinary scholarship and urban cultural policymaking.

The innovative use of murals in Kaunas exemplifies a forward-thinking model for cities worldwide seeking to reconcile heritage with contemporary identity. As walls speak through myriad languages and images, they challenge observers to reconsider the ways in which public spaces can reflect and shape communal realities. This research underscores the power of visual language as a tool for cultural activism, historical preservation, and community empowerment, ultimately illustrating that murals are more than mere decoration—they are vital instruments for shaping the soul of a city.

Subject of Research: Not applicable

Article Title: Painting the linguistic landscape of Kaunas: a study of multilingual murals in public spaces

News Publication Date: 5-Aug-2025

Web References:
https://www.tandfonline.com/doi/full/10.1080/01434632.2025.2539916

References:
Journal of Multilingual and Multicultural Development

Image Credits: KTU

Keywords: linguistic landscape, multilingual murals, street art, cultural activism, collective memory, Kaunas, European Capital of Culture, Holocaust remembrance, urban identity, public space, cultural heritage, social communication

Perovskite solar cells are distinctive for their lightweight, thin-film, and flexible attributes, combined with the use of relatively inexpensive materials compared to traditional silicon-based solar cells. These characteristics position perovskite cells as a versatile alternative that could potentially reduce production costs and expand the range of applications. However, despite these advantages, perovskite solar cells have been plagued by rapid degradation, particularly when exposed to environmental stressors such as humidity, temperature fluctuations, and pressure changes. This degradation results in a swift decline in their efficiency and material integrity, restricting their practical deployment at scale.

A central focus of ongoing research has been to enhance the stability of perovskite materials to ensure prolonged operational lifetimes akin to commercial silicon solar cells. One pivotal approach involves surface passivation, a technique that mitigates defects at the perovskite interface, thereby bolstering resistance to environmental factors. Passivation effectively renders the perovskite surface chemically inert and less susceptible to degradation induced during manufacturing or operation. In hybrid perovskites, which feature a molecularly thin two-dimensional (2D) layer atop a three-dimensional (3D) perovskite framework, passivation has already proved successful, improving both efficiency and longevity by protecting against moisture ingress.

However, the translation of this strategy to fully inorganic perovskite systems has remained elusive. The major obstacle arises from the inherent incompatibility between the 2D layers and the inorganic perovskite surface; these layers typically fail to adhere adequately, preventing the formation of a stable protective interface. This limitation has historically curtailed efforts to enhance inorganic perovskites, which otherwise excel in thermal and chemical stability over their hybrid counterparts.

Addressing this complex challenge, the KTU-led research team innovated by synthesizing perfluorinated 2D ammonium cations within their laboratory. The introduction of fluorine atoms, known for their high electronegativity, alters the electronic properties of the ammonium groups, thereby facilitating stronger hydrogen bonds with the lead iodide fragments composing the perovskite lattice. This chemical modification enables the successful formation of a durable 2D layer that firmly attaches to the 3D inorganic perovskite surface.

The establishment of this novel 2D/3D heterostructure is a remarkable milestone. It defies previous assumptions that such stable interfaces were unattainable in purely inorganic perovskite systems. The resulting heterostructures exhibit remarkable thermal stability and mechanical robustness, enduring high-temperature conditions without compromising their structural integrity. This discovery represents a profound advancement in material chemistry, significantly expanding the toolkit available for engineering next-generation solar technologies.

Integrating this innovative passivation framework into photovoltaic devices, the research team achieved unprecedented solar energy conversion efficiencies exceeding 21 percent in fully inorganic perovskite solar cells. Beyond small-scale cells, they also fabricated perovskite mini-modules with active areas more than 300 times larger than typical laboratory samples, which attained nearly 20 percent efficiency. This scale-up demonstrates the practical feasibility of the technology for commercial applications, overcoming a common hurdle in solar cell research.

Stability testing further underscored the robustness of these solar modules. Subjected to continuous illumination at elevated temperatures of 85°C for over 950 hours, the devices maintained stable operation without significant efficiency loss. While such temperatures exceed typical real-world solar cell operating conditions, these rigorous tests adhere to internationally recognized standards, serving as critical benchmarks for durability. The results are indicative of longevity comparable to that of commercially deployed silicon solar cells, reinforcing confidence in the potential market readiness of this technology.

The implications of this research reach beyond incremental performance improvements. By demonstrating that fully inorganic perovskite solar cells can achieve both high efficiency and extended operational lifetimes, the KTU-led team advances the field towards the commercialization of perovskite-based photovoltaics. Their work, published in the esteemed journal Nature Energy, reflects a synthesis of sophisticated chemical engineering and applied materials science, highlighting the interdisciplinary nature of contemporary energy research.

This pioneering study underscores the significance of precise chemical modifications at the molecular level to overcome long-standing material challenges. The ability to engineer passivation layers that firmly adhere to inorganic perovskite surfaces introduces new avenues for designing solar cells capable of enduring diverse environmental stresses, ultimately broadening the applicability of perovskite photovoltaics across different climatic conditions and use cases.

Moreover, the success of assembling stable 2D/3D heterostructures suggests parallel opportunities in other optoelectronic devices where interface stability is critical. The methodologies developed here could inspire innovations in light-emitting diodes, sensors, and photodetectors, showcasing the broader impact of the findings within the vast realm of semiconductor research.

As the global demand for clean and renewable energy intensifies, advancements such as those achieved by the KTU research consortium bring us closer to realizing practical, scalable, and economically viable solar technologies. Fully inorganic perovskite solar cells, fortified with strategically engineered passivation layers, stand poised to complement or even surpass traditional photovoltaic systems, accelerating the transition to a sustainable energy future.

The journey from laboratory discovery to real-world implementation involves continuous refinement and validation under diverse operational conditions. Nonetheless, the markers set by this research define a promising trajectory, characterized by enhanced efficiency metrics, remarkable stability, and scalable manufacturing potential, all crucial parameters as the solar industry confronts the growing challenges of climate change and energy security.

In summary, the fusion of chemical ingenuity and photovoltaic engineering demonstrated by the KTU team is a testament to the transformative power of targeted materials science. By overcoming the fundamental obstacle of perovskite instability through innovative surface passivation, they have carved a new path for fully inorganic perovskite solar cells, potentially reshaping the solar energy landscape in the years to come.

Subject of Research: Fully inorganic perovskite solar cells with enhanced efficiency and stability through novel 2D/3D heterostructure passivation.

Article Title: Cation interdiffusion control for 2D/3D heterostructure formation and stabilization in inorganic perovskite solar modules

News Publication Date: 16-Jul-2025

Web References: https://www.nature.com/articles/s41560-025-01817-6

References:
Rakštys, K. et al. “Cation interdiffusion control for 2D/3D heterostructure formation and stabilization in inorganic perovskite solar modules,” Nature Energy, 2025.

Image Credits: KTU (Kaunas University of Technology)

Keywords

Perovskite solar cells, inorganic perovskites, solar cell stability, surface passivation, 2D/3D heterostructures, photovoltaic efficiency, renewable energy, materials chemistry, fluorinated ammonium cations, photovoltaic durability, solar modules, energy conversion technology

Led by KTU professor Dr. Tadas Ždankus, a team of researchers is delving into the multifaceted capabilities of soil, exploring its role not only in construction but as an innovative medium for heat retention. Central to their investigation is a ground-based heat accumulator designed to capture excess thermal energy and store it beneath the surface, making it accessible during peak demand periods. “Our objective was to convert heat that would typically dissipate into the ground as waste into a valuable energy resource,” elaborates Dr. Ždankus, providing insight into the groundbreaking work being undertaken.

The research indicates that the underground holds vast potential for efficient heat storage. Initially, Professor Ždankus and his team explored the applicability of wind energy, primarily focused on how it could generate heat without the need for traditional electricity generation. By employing a hydraulic system, they discovered a fascinating phenomenon: hydraulic losses, often viewed as inefficiencies, can actually produce usable heat. “The hydraulic losses we were attempting to minimize ultimately emerged as significant heat generation,” states Dr. Ždankus, highlighting a key reevaluation of conventional assumptions.

Moreover, the challenge of heat loss during transmission to buildings intended for heating during colder months prompted the research question. The pressing inquiry sought to pinpoint not only methods of reducing ground heat loss but also strategies to effectively store and retain it for future utilization. “We wanted to address the core issue of heat retention alongside its generation,” adds Ždankus, emphasizing the dual focus of their studies.

To validate their conceptual framework, the researchers engaged in experimental trials that simulated the introduction of an artificial heat source within the upper layers of soil. They meticulously measured the dynamics of heat distribution, the velocity of its movement through the ground, and the duration of its persistence. One compelling test involved heating the soil to a point where moisture began to evaporate, leading to a critical phase change from liquid to vapor, which is an integral aspect of thermal energy storage.

“Phase change serves as an efficient medium for heat storage, allowing for a substantially greater amount of energy to be embedded within the soil,” notes a KTU professor. The movement of vapor through the ground not only enhances heat diffusion but also enables precise control over energy distribution. “Wherever vapor flow reaches, we observed a notable temperature increase, signifying that the energy is mobilizing effectively,” explains Professor Ždankus, underscoring the significant implications of their findings.

The potential applications for such a system are extensive, with possibilities for balancing district heating networks or providing relief during periods of electricity grid overload. “Additionally, the installation of thermal accumulators for individual use beneath residential structures, streets, or parking lots could become a practical reality,” he adds, urging further exploration of these innovative applications. The research underscores that the efficiency of underground heat storage may exceed previous expectations, paving the way for a sustainable energy future.

Expanding upon the confirmation of the feasibility of underground heat storage, the researchers have begun investigating practical implementations. Their early endeavors sought to understand whether the soil located under buildings could play a passive role in thermal retention, reiterating the natural downward flow of heat from structures into the earth. “Our laboratory work led us to the development of a prototype ground energy cell, coupled with a testing setup to analyze the patterns of heat propagation within various soil layers,” Dr. Ždankus explains.

The study also involved comprehensive assessments of how effectively the soil could store heat over time and the speed at which it returned to its baseline temperature. These pivotal findings are essential for gauging the long-term viability of subterranean heat storage systems. The research initiative also engaged KTU master’s students, allowing for a collaborative investigation that spanned an entire year. The extensive chronological data collection facilitated analysis of seasonal thermal behavior and enabled meaningful comparisons with meteorological data.

“Our year-long data collection revealed inherent seasonal trends in soil temperature, providing insightful perspectives on natural patterns,” notes Professor Ždankus, as he outlines the importance of this collaborative effort. Additionally, detailed numerical simulations were conducted to evaluate potential heat losses, establishing the effectiveness of heat storage beneath buildings. “We found that even a passive approach to utilizing isolated soil volumes beneath buildings can significantly curtail heat loss while bolstering overall energy efficiency. Reduced heat loss translates to decreased energy requirements for heating, which, in turn, correlates with lower carbon emissions when derived from fossil fuels or biomass,” elucidates Ždankus.

In light of their promising results, the researchers are diligently working on refining their prototypes and enhancing heat distribution control technologies. The collaborative approach undertaken by the researchers encompasses a diverse range of expertise, ranging from geotechnical engineering to energy systems optimization. “Our imminent objective is to integrate current methodologies, including boreholes and piles, along with various underground heat exchange technologies, into a cohesive framework capable of benefiting both industrial and residential sectors,” he concludes.

The groundbreaking research emerging from Kaunas University of Technology emphasizes the vast, untapped potential of underground heat storage systems. By reimagining the role of soil in energy efficiency and heat retention, the work not only signifies a shift in understanding but also heralds an avenue for innovative solutions to energy management challenges. The implications of this research are poised to extend far beyond academic curiosity, with tangible benefits that can contribute to a sustainable energy landscape for future generations.

Subject of Research: Underground Heat Storage
Article Title: Research on Increasing the Building’s Energy Efficiency by Using the Ground Beneath It for Thermo-Accumulation
News Publication Date: 2-Jan-2025
Web References: Sustainability
References: DOI
Image Credits: KTU

Keywords

Underground energy storage, thermal energy, heat retention, soil science, energy efficiency, sustainable energy solutions, phase change, geothermal heating.