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All Journal Jurnal Sains Materi Indonesia Bulletin of Chemical Reaction Engineering & Catalysis Science and Technology Indonesia Indonesian Journal of Chemistry Jurnal Abdidas Makara Journal of Science Environmental and Materials Bulletin of Chemical Reaction Engineering & Catalysis
Yuni Krisyuningsih Krisnandi, Yuni Krisyuningsih
Department Of Chemistry, FMIPA, Universitas Indonesia, Depok
Biochemistry, Genetics & Molecular Biology Chemical Engineering, Chemistry & Bioengineering Chemistry Control & Systems Engineering Education Energy Engineering Environmental Science Health Professions Materials Science & Nanotechnology Mathematics Physics Public Health Social Sciences Other

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Journal : Environmental and Materials

 1 
Carbon-coated nickel foam for hypochlorous acid sensor Sanjaya, Afiten Rahmin; Riyanto, Hanzhola Gusman; Rahmawati, Isnaini; Putri, Yulia Mariana Tesa Ayudia; Nurhalimah, Dede; Saepudin, Endang; Tesla, Yudistira; Krisnandi, Yuni Krisyuningsih
Environmental and Materials Vol. 1 No. 1: (June) 2023
Publisher : Institute for Advanced Science, Social, and Sustainable Future

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.61511/eam.v1i1.2023.105

Abstract

The electrochemical detection method of hypochlorous acid (HOCl) using carbon foam electrodes have been successfully developed. The carbon foam was prepared from carbon-coated nickel foam which is synthesized using a hydrothermal-carbonization method. SEM characterization indicated that the optimum synthesis of carbon-coated nickel foam has been achieved on the 4th layer coating process with an expected spherical structure, while characterization using FTIR and Raman spectroscopy confirmed the formation of graphitic material with D band and G band characteristics. An electroactive surface area of ​​0.0236 cm2 was achieved. Cyclic voltammetry of HOCl in 0.1 M phosphate buffer solution pH 6.0 showed the best current response for HOCl reduction occurs at a potential of -0.3 V (vs. Ag/AgCl). Further detection of HOCl using amperometry technique in the concentration range of 2-200 μg/mL showed good linearity with sensitivity of 9.112 mA/µg/L and an estimated detection limit of 1.96 µg/mL. Good repetition is indicated by the RSD value of 2.499 % (n=5). This developed sensor also showed good selectivity in the presence of interference compounds, such as FeCl2 and CuSO4. Besides, the determination of HOCl in tap water has been successfully conducted and generated a comparable result with the UV-VIS method (3.30 µg/mL hypochlorite). The results indicated that the developed sensor is promising for the detection of HOCl in environmental applications.
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.
Optimizing vanillin and phenol production from benzyl phenyl ether using CoMoO4/H-ZSM-5: A Box-Behnken design approach Khatrin, Irena; Amanullah, Duha Rushida; Wibowo, Rahmat; Howe, Russell Francis; 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.v3i2.2025.2161

Abstract

Background: Lignin valorization into high-value chemicals is crucial for sustainable development. This study focused on optimizing the catalytic conversion of benzyl phenyl ether (BPE), a lignin model compound, to vanillin and phenolic compounds. Methods: Hierarchical H-ZSM-5 was synthesized via a dual-template method and subsequently modified by wet impregnation with bimetallic cobalt and molybdenum oxides (CoMoO4/H-ZSM-5). Catalyst properties were thoroughly characterized using various techniques, including XRD, FTIR, XRF, N2-physisorption, and SEM-EDS mapping. Reaction conditions, specifically Co:Mo ratio, temperature, and reaction time, were optimized using the Box-Behnken design (BBD), and product yields were quantified by High-Performance Liquid Chromatography (HPLC). Findings: Characterization confirmed successful catalyst synthesis, organic template removal, and bimetal oxide incorporation without significant structural damage. Catalytic tests demonstrated 100% BPE conversion. The highest experimental vanillin yield achieved was 54.69%. BBD analysis revealed that the interaction between Co:Mo ratio and temperature, as well as the quadratic effect of Co:Mo ratio, were the most influential factors impacting product yields. The optimal parameters for maximizing vanillin and phenolic yield were determined to be a Co:Mo ratio of 3:7, a temperature of 169 °C, and a reaction time of 31 minutes. While the phenolic model showed a reasonable fit (R² = 0.76), the vanillin model exhibited a lower fit (R² = 0.34) with significant lack-of-fit. Conclusion: This research provides crucial insights into the efficient production of high-value chemicals from BPE, offering a comprehensive optimization approach for the CoMoO4/H-ZSM-5 catalytic system. Novelty/Originality of this article: This study represents a novel contribution to lignin valorization.
One-pot catalytic conversion of glucose to 2,5-furandicarboxylic acid over NiO-modified ZSM-5 zeolites: Effects of reaction temperature and solvent ratio Pratama, Arnia Putri; Mulyadi, Andita Junia; Wibowo, Rahmat; 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.v3i2.2025.2642

Abstract

Background: 2,5-Furandicarboxylic acid (FDCA) has gained increasing attention as a key bio-based intermediate for the production of polyethylene furanoate (PEF) and other sustainable polyesters, offering a viable alternative to fossil-derived monomers. Although FDCA is conventionally produced via oxidation of 5-hydroxymethylfurfural (HMF), direct one-pot conversion of glucose remains challenging due to the requirement for integrated catalytic functions and the strong influence of reaction conditions. Hierarchical zeolites modified with transition-metal oxides are promising for one-pot glucose-to-FDCA conversion; however, the effects of reaction temperature and solvent composition have not been systematically evaluated and are examined here using hierarchical ZSM-5, NiO-modified ZSM-5, and NiO catalysts. Methods: Hierarchical ZSM-5 was synthesized via a dual-template method and modified with NiO through an impregnation–spray technique to introduce redox-active sites. The catalysts were characterized using X-ray diffraction, Fourier-transform infrared spectroscopy, nitrogen physisorption, and Scanning Electron Microscope-Energy Dispersive X-Ray to establish correlations between structural, compositional, and textural properties and catalytic performance. Catalytic reactions were conducted at varying temperatures using a γ-valerolactone–water solvent system with different volume ratios. Findings: NiO-modified hierarchical ZSM-5 exhibited superior catalytic performance compared to the parent zeolite and NiO, achieving a maximum FDCA yield of 2.36% at 150 °C with an optimal γ-valerolactone–water ratio of 1:1. Higher FDCA yield over NiO-modified hierarchical ZSM-5 reflects the combined effects of hierarchical porosity, NiO species, reaction temperature, and solvent ratio. Conclusion: This study demonstrates that NiO-modified hierarchical ZSM-5 can promote one-pot glucose-to-FDCA conversion, with reaction temperature and solvent ratio identified as key parameters for performance optimization. Novelty/Originality of this article: This study provides a systematic assessment of the effects of reaction temperature and γ-valerolactone–water solvent ratio on FDCA formation over NiO-modified hierarchical ZSM-5 in a one-pot glucose conversion system, establishing catalyst and process design principles.
Co-Authors Adam, Martin Adel Fisli Ahmed, Sabeel Alika Rizki Anggraeni Amanullah, Duha Rushida Anastasia Agnes Anita Nur Ramadhani Anya Prilla Azaria Atia, Hanan Bayu Adi Samodro Dita Arifa Nurani Eckelt, Reinhard Ekananda, Rizki Endang Saepudin, Endang Fahriansyah, Irsan Griffith, Benyamin E Hanna, John Vincent Hanzhola Gusman Riyanto Hedi Surahman Herlina, Idra Iman Abdullah Iman Abdullah Iman Abdullah Jarnuzi Gunlazuardi Juwono, Ariadne Lakshmidevi Khanifah Khanifah Khatrin, Irena Luthfiyah, Siti Zahrotul Marintan, Marchia Marthalena Martin, Andreas Muhammad Faisal Muhammad Ridwan Muiz, Lisna Junaeni Mulyadi, Andita Junia Noer Fadlina Antra Novia Arinda Pradisty Nurani, Dita Arifa Nurhalimah, Dede Paputungan, Zulkarnaen Pradisty, Novia Arinda Pratama, Arnia Putri Priantini, Tania Putri Nurul Amalia Putri, Danika Nurranalya Putri, Yulia Mariana Tesa Ayudia Rahayu, Dyah Utami Cahyaning Rahma Widya Rahma Widya RAHMAT WIBOWO Rahmawati, Isnaini Ralentri Pertiwi Richter, Manfred Ridwan, Ridwan Rika Tri Yunarti Riri Andriyanti Riwandi Sihombing Riwandi Sihombing Riwandi Sihombing Riwandi Sihombing Riwandi Sihombing, Riwandi Robert, Didier Russell Francis Howe Russell Francis Howe Russell Francis Howe Russell Francis Howe, Russell Francis Sanjaya, Afiten Rahmin Saragi, Indah Revita Sariman Sariman Savitri Octaviani Siti Zahrotul Luthfiyah SJATHA, FITHRIYAH Supriyono Supriyono Tengku Riza Zarzani N Tesla, Yudistira Uwin Sofyani Widhyasmaramurti Widya, Rahma Yunarti, Rika Tri