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Pham, Quang Minh
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Preparation of a Novel ACS/CS/EDTA Composite from Sugarcane Bagasse for Enhanced Adsorption of Carbon Dioxide Pham, Quang Minh; Nghiem, Xuan Son; Minh, Thang Le; Vu, Anh-Tuan
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 4 Year 2024 (December 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20239

Abstract

This study presents a simple method for the production of activated carbon (ACS) from sugarcane bagasse. To increase the CO2 adsorption efficiency, the ACS/CS/EDTA composite was prepared by modifying ACS with ethylenediaminetetraacetic acid (EDTA) and chitosan (CS). The as-prepared materials were characterized by X-ray Diffraction (XRD), Field Emission Scanning Electron Microscope (FE-SEM), Energy Dispersive X-ray Spectroscopy (EDS), High Resolution – Transmission Electron Microscope (HR-TEM), Fourier Transform Infra-Red (FT-IR), and N2 adsorption/desorption isotherms. The obtained ACS is an amorphous and porous material and contains both micropores and mesopores. The micropore volume, mesopore volume, Brunauer–Emmett–Teller (BET) surface area and average pore width of the ACS are 0.112 cm3/g, 0.193 cm3/g, 354.8 m2/g and 55.7 Å, respectively. The dispersion of EDTA and CS on the activated carbon leads to a deterioration of the structural properties while it increases the aggregation of the ACS/CS/EDTA composite. The performance of the materials was evaluated by CO2 adsorption at ambient pressure. The effects of EDTA, adsorption temperature and gas composition were also investigated in detail. In addition, the durability of the composite was evaluated through the adsorption and desorption cycle. Copyright © 2024 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Enhanced Photocatalytic Performance of Ag-Modified ZnO for the Degradation of Tartrazine Dye Thi, Cam Vi Dao; Nguyen, Tuan Anh; Pham, Quang Minh; Vu, Anh-Tuan
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 3 Year 2025 (October 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20443

Abstract

In this study, ZnO materials were synthesized using the hydrothermal method, and then modified with Ag using glucose, a biologically derived and environmentally friendly reducing agent, to produce Ag/ZnO materials with varying Ag contents. The obtained material samples were characterized using X-ray diffraction (XRD), scanning electron microscopy (SEM), and photoluminescence spectroscopy (PL) to determine the crystal structure, surface morphology, and optical properties, respectively. The results showed that the Ag/ZnO sample containing 5 % Ag (Ag/ZnO-5 %) was able to completely decompose Tartrazine (TA) dye after 80 min of irradiation with an 85 W UV lamp, with a first-order reaction rate constant k = 0.03789 min-1 and degradation capacity of 20 mg/g. In comparison, pure ZnO achieved an efficiency of less than 60 %. Factors affecting the photodegradation efficiency, such as initial TA concentration, catalyst dosage, and pH of the solution, were investigated to optimize the reaction conditions. In addition, the Ag/ZnO material exhibited high degradation efficiency toward various organic pollutants, such as Janus Green B (JGB), Congo red (C-Red), Methylene blue (MB), and Caffeine, indicating its potential for broad applications in wastewater treatment. Notably, the investigation of different irradiation light sources (UV, visible light, and sunlight) revealed that sunlight could promote complete degradation of TA in only 20 min of exposure. The photocatalytic reaction mechanism was also proposed to clarify the role of Ag as well as ZnO in enhancing the performance of the Ag/ZnO material system. Copyright © 2025 by Authors, Published by BCREC Publishing Group. This is an open access article under the CC BY-SA License (https://creativecommons.org/licenses/by-sa/4.0).
Co-Authors Minh, Thang Le Nghiem, Xuan Son Nguyen, Tuan Anh Thi, Cam Vi Dao Vu, Anh-Tuan