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All Journal Communications in Science and Technology Jurnal Abdimas Kartika Wijayakusuma
Lestari, Witri Wahyu
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Journal : Communications in Science and Technology

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Efficient degradation of methyl orange through photo-Fenton processes with MIL-100(Fe) modified Fe\(_3\)O\(_4\) (Fe\(_3\)O\(_4\)@MIL-100(Fe)) catalyst Puspitasari, Melani Puji; Pratama, Jeesica Hermayanti; Nugroho, Roshid Adi; Lestari, Witri Wahyu; Kemala, Yusnadia; Saraswati, Teguh Endah; Fansuri, Hamzah; Mukti, Rino Rakhmata; Suharbiansah, Rujito S. R.
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1493

Abstract

The research successfully synthesized a composite MIL-100(Fe) modified Fe3O4 (Fe3O4@MIL-100(Fe)) catalyst and examined its efficiency in degrading methyl orange (MO) through the photo-Fenton process compared to Fenton. The different percentages of Fe3O4 were integrated into MIL-100(Fe) and their effects on material characteristics and degradation capabilities were studied. Ex-situ synthesis involved varying Fe3O4 weight ratios (3, 10, and 20% w/w). Characterization techniques confirmed the integration of Fe3O4 and MIL-100(Fe) and revealed changes in surface area, pore size, and thermal stability with Fe3O4 addition. Meanwhile, removal tests showed promising results with the photo-Fenton process exhibiting maximum efficiency (95.51%) using 10% Fe3O4@MIL-100(Fe). This study provides valuable insights into developing efficient photo-Fenton catalysts for environmental remediation, particularly for addressing dye pollution in wastewater by highlighting the potential of Fe3O4@MIL-100(Fe) composites in this context.
Investigation of hexanal removal through adsorption and photocatalysis on ZIF-7 modified with ZnO, TiO\(_2\), and ZnO/TiO\(_2\) using ATR-FTIR Naufal, Widyan Muhammad; Wahyuningsih, Sayekti; Lestari, Witri Wahyu
Communications in Science and Technology Vol 9 No 2 (2024)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.9.2.2024.1505

Abstract

Zeolitic imidazolate framework (ZIF) is renowned for its high adsorption capacity and frequently adsorbs organic pollutants. However, its high band gap energy has limited its photocatalytic activity, thus necessitating a modification for enhance performance enhancement. This study focuses on developing a ZIF-7 composite material that integrates adsorption and photocatalysis to remove volatile organic compounds (VOCs), particularly hexanal. Modifications were made by incorporating ZnO, TiO2, and ZnO/TiO2 via a solvothermal method using dimethylformamide (DMF). ATR-FTIR analysis was employed to monitor any changes in peak intensity related to the C=O vibrations of hexanal around 1700 cm-1. The results showed that all samples effectively adsorbed hexanal, reducing peak intensity after UV irradiation, and confirming successful photocatalysis. Notably, TiO2@ZIF-7 exhibited the highest photocatalytic performance with 88.06% degradation efficiency. This study confirms that the ATR-FTIR method can be used to monitor the success of adsorption and photocatalysis and shows the potential for developing composite materials to remove VOCs such as hexanal.
HKUST-1-Catalyzed Chan–Evans–Lam C–O Coupling Under Mild Conditions with Catalyst Reusability Sidik, Muhamad R. S.; Kurnia, Irwan; Permana, Yessi; Arrozi, Ubed S.F.; Ciptonugroho, Wirawan; Lestari, Witri Wahyu; Budiman, Yudha Prawira
Communications in Science and Technology Vol 10 No 2 (2025)
Publisher : Komunitas Ilmuwan dan Profesional Muslim Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.21924/cst.10.2.2025.1837

Abstract

The Chan–Evans–Lam coupling refers to a valuable method for constructing C–O and C–N bonds under mild conditions. Nevertheless, the development of efficient and reusable heterogeneous catalysts remains limited. In this study, we investigated copper-based metal–organic frameworks as catalysts for C–O bond formation between 4-methoxyphenylboronic acid and phenol. The study revealed that HKUST-1 exhibited a significant enhancement in performance when compared to Cu-BDC, yielding up to 86% at room temperature and demonstrating superior accessibility of Cu2+ active sites. A systematic optimization of reaction parameters identified NEt3 as the most effective base, DCM as the optimal solvent, and a mild temperature increase to 40 °C as the key factor enabling a maximum yield of 94%. Studies on recyclability demonstrated that HKUST-1 exhibited high catalytic performance over multiple cycles without significant structural degradation, as confirmed by PXRD analysis. Overall, this work highlights HKUST-1 as an efficient, robust, and reusable heterogeneous catalyst for Chan–Evans–Lam C–O coupling, thus demonstrating its potential for sustainable synthetic applications.
Co-Authors Abdul Basith Arrozi, Ubed S.F. Budiman, Yudha Prawira Ciptonugroho, Wirawan Dian Maruto Widjonarko Edi Pramono Hamzah Fansuri Kemala, Yusnadia Kurnia, Irwan Melina, Dika Caesar Mukti, Rino Rakhmata Naufal, Widyan Muhammad Nugroho, Roshid Adi Pratama, Jeesica Hermayanti Puspitasari, Melani Puji Rahayu Rahayu Sayekti Wahyuningsih Sentot Budi Raharjo Sidik, Muhamad R. S. Suharbiansah, Rujito S. R. Teguh Endah Saraswati Venny, Venny Wulandari, Resa Yessi Permana Zetadini, Reza