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Vu, Anh-Tuan
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Synthesis of Mesoporous ZnO•SiO2 Nanocomposite from Rice Husk for Enhanced Degradation of Organic Substances Including Janus Green B under Visible Light Nguyen, Thu Huong; Vu, Tuan Cuong; Le, Trung Phong; Nguyen, Thu Huyen; Do, Xuan Truong; Vu, Anh-Tuan
Bulletin of Chemical Reaction Engineering & Catalysis 2024: BCREC Volume 19 Issue 3 Year 2024 (October 2024)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20175

Abstract

Rice husk (RH) is often mentioned as an agricultural by-product, often used in the pass as fertilizer and for raw burning. With modern science, RH have been researched and found many new potential benefits and applications. In this study, RH were used to synthesize amorphous SiO2, which was used to prepare the ZnO•SiO2 nanocomposites by a hydrothermal method. The as-synthesized materials were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and N2 adsorption/desorption isotherm. Their photocatalytic properties were studied by an ultraviolet-vis spectrophotometer and a fluorescence spectrophotometer. The ZnO•SiO2 nanocomposite has an excellent ability to degrade organic substances such as dyes, antibiotics, caffeine, etc. The effects of operating parameters on the photo-degradation reaction progress, including catalyst dosage, initial dye concentration, and pH of the initial dye were investigated in detail. In addition, the photodegradation rate of the dye on the ZnO•SiO2 nanocomposite was evaluated using the pseudo-first-order model. The ZnO•SiO2 nanocomposite can be used as a photocatalyst for wastewater treatment as it detaches much more easily from the solution. 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).
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).
Photocatalytic Degradation of Methyl Orange Using TiO2 - Coated Cordierite Substrates: A Comparison of Dip-Coating and Spray-Coating Methods Nguyen, Trung Hieu; Nguyen, Thu Huong; Vu, Anh-Tuan; Minh, Thang Le
Bulletin of Chemical Reaction Engineering & Catalysis 2025: BCREC Volume 20 Issue 4 Year 2025 (December 2025)
Publisher : Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS)

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.9767/bcrec.20400

Abstract

In this study, the calcination temperature of TiO2 nanoparticles was investigated at 300, 350, 400, and 450 °C. The results indicated that 400 °C was the optimal calcination temperature, yielding the highest amount of synthesized TiO2 nanoparticles remaining in the anatase phase (97.44 %). TiO2 nanoparticles were coated on cordierite using two methods: spray coating and dip coating. Their characteristics were analyzed and evaluated utilizing several modern techniques. Additionally, their photocatalytic and recovery capabilities were assessed based on methylene orange (MO) degradation efficiency. The spray coating method allowed the TiO2 nanoparticles to evenly cover the cordierite surface, resulting in the highest MO degradation efficiency and best recovery ability. The MO degradation efficiency remained at 83.07 % after 5 reuse cycles. 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 Do, Xuan Truong Le, Trung Phong Minh, Thang Le Nghiem, Xuan Son Nguyen, Thu Huong Nguyen, Thu Huyen Nguyen, Trung Hieu Nguyen, Tuan Anh Pham, Quang Minh Thi, Cam Vi Dao Vu, Tuan Cuong