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All Journal VALENSI JURNAL KIMIA SAINS DAN APLIKASI Bulletin of Chemical Reaction Engineering & Catalysis Indonesian Journal of Chemistry Makara Journal of Science SAINSMAT: Jurnal Ilmiah Ilmu Pengetahuan Alam Environmental and Materials Bulletin of Chemical Reaction Engineering & Catalysis
Iman Abdullah
Department Of Chemistry, Faculty Of Mathematics And Natural Science, Universitas Indonesia, Depok 16424, Indonesia
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Decision Sciences, Operations Research & Management Education Energy Engineering Physics

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Journal : Environmental and Materials

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Amine-modified Ni-DOBDC MOF for CO2 capture: CO2 adsorption capacity and reusability Fahriansyah, Irsan; Khatrin, Irena; Abdullah, Iman; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 2 No. 2: (December) 2024
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v2i2.2024.1431

Abstract

Background: Anthropogenic carbon dioxide (CO₂) emissions have risen significantly due to the extensive use of fossil fuels, necessitating the development of effective CO₂ capture and conversion techniques. Adsorption using Metal-Organic Frameworks (MOFs) has shown great potential due to their high CO₂ adsorption capacity, particularly Ni-based MOFs. Enhancing their adsorption efficiency remains a key research focus to improve sustainability in CO₂ capture applications. Methods: Ni-based MOF (Ni-DOBDC) was synthesized using the solvothermal method, employing DMF as the solvent and 2,5-dihydroxyterephthalic acid (DOBDC) as the organic ligand. To enhance CO₂ adsorption capacity, Ni-DOBDC was further modified with ethylenediamine (EDA) via post-synthetic modification. Structural characterization was performed using XRD, confirming similarity to the Ni-DOBDC reference (CCDC 288477), and FTIR, which showed enhanced absorbance peaks. SEM-EDX analysis revealed a flower-like morphology with an average particle size of 0.75 μm. CO₂ adsorption tests were conducted on Ni-DOBDC and EDA/Ni-DOBDC (10%) using the titration method under controlled conditions. Findings: The CO₂ adsorption capacity of Ni-DOBDC and EDA/Ni-DOBDC was tested at 70°C with a CO₂ concentration of 50% in N₂. EDA modification significantly improved CO₂ adsorption capacity, with EDA/Ni-DOBDC achieving 9.95 mmol g⁻¹ compared to pristine Ni-DOBDC’s 6.44 mmol g⁻¹. However, Ni-DOBDC exhibited better regeneration ability in a three-cycle reusability test, likely due to EDA leaching during regeneration. Conclusion:  EDA-modified Ni-DOBDC demonstrates enhanced CO₂ adsorption capacity, making it a promising material for CO₂ capture applications. However, its reduced regeneration stability suggests the need for further optimization to improve long-term performance. Future studies should explore strategies to minimize EDA leaching while maintaining high adsorption efficiency. Novelty/Originality of this article: This study provides new insights into improving Ni-based MOF performance for CO₂ capture through post-synthetic modification with EDA. The findings highlight a trade-off between increased adsorption capacity and material stability, emphasizing the need for further refinement in MOF functionalization strategies.
Increasing energy density of vanadium redox flow batteries: A comprehensive review Ahmed, Sabeel; Abdullah, Iman; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 3 No. 2: (December) 2025
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v3i2.2025.1828

Abstract

Background: Vanadium Redox Flow Batteries (VRFBs) represent a leading energy storage technology for renewable integration due to their long cycle life, high safety, and flexible scalability. However, their low energy density and high cost continue to limit widespread adoption. This study aims to synthesize and critically evaluate recent advances in enhancing VRFB performance through innovations in electrode materials, electrolyte chemistry, and membrane design. Methods: This study adopts a comprehensive literature review approach, analyzing theoretical and experimental research published in recent years. The review focuses on advancements in nanostructured electrode surfaces, optimized electrolyte formulations, and functional hybrid membranes. Theoretical insights from materials science and electrochemistry were integrated to establish the correlation between structure, performance, and efficiency. Findings: The reviewed studies reveal that nanostructured and heteroatom-doped electrodes enhance redox kinetics and minimize side reactions, while optimized electrolytes with mixed acids and stabilizers improve vanadium solubility and thermal stability. Hybrid polymer–inorganic membranes effectively reduce vanadium ion crossover and maintain high proton conductivity, thereby increasing coulombic and energy efficiencies. Collectively, these advancements improve power output, reduce self-discharge, and enhance long-term cycling performance, moving VRFBs closer to economic feasibility. Conclusion: Advancements in material design and system optimization are pivotal in overcoming the limitations of conventional VRFBs. Continued research on scalable, low-cost materials, electrolyte recycling, and hybrid integration will further promote sustainable energy storage. Novelty/Originality of this article: This review uniquely integrates material-level and system-level perspectives, offering a holistic understanding of how innovations across components collectively advance high-efficiency, cost-effective, and environmentally sustainable VRFB technology for next-generation renewable energy systems.
Co-Authors adawiah adawiah, adawiah Agustino Zulys Ahmed, Sabeel Asep Saefumillah Dhania Dwi Aprianti Fadhilla, Rizkha Fahriansyah, Irsan Inna Husna Khatrin, Irena Mabuchi, Takuya Nasruddin Nasruddin Octaviani, Savitri Pratama, Arnia Putri Putri Nurul Amalia Rahayu, Dyah Utami Cahyaning Riwandi Sihombing Riwandi Sihombing, Riwandi Savitri Octaviani Soleh Kosela Suminta, Tiara Amalia Uwin Sofyani Widayanti Wibowo Yuni K. Krisnandi Yuni Krisyuningsih Krisnandi Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih