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All Journal Indonesian Journal of Chemistry
Luan, Van Hoang
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Chemical Engineering, Chemistry & Bioengineering Chemistry

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Solar-Light-Driven N-TiO2-SiO2 Photocatalytic Activity on the Simultaneous Removal of Bisphenol-A and Escherichia coli Le, Minh Vien; Tran, Trung Tan; Hoang, Anh Hoang; Nguyen, Hien Thao; Le, Vu Truong-Son; Luan, Van Hoang; Ngo, Manh Thang
Indonesian Journal of Chemistry Vol 25, No 2 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99313

Abstract

N-doped TiO2-SiO2 nanocomposites were synthesized using a facile sol-gel method and characterized through various techniques. Their photocatalytic performance was assessed by degrading BPA (10 mg L−1) and inactivating Escherichia coli (~109 CFU mL−1) under single and dual contaminant conditions using a 26 W solar light simulator. Among the synthesized materials, the N-TiO2-SiO2 nanocomposite with a 10% N:Ti molar ratio (TS5N10) demonstrated the highest photocatalytic activity, achieving 83.9% BPA degradation and complete E. coli disinfection in single contaminant systems after 4 h of irradiation. Notably, TS5N10 exhibited robust performance even in dual-contaminant scenarios involving BPA and E. coli. Mechanistic investigations identified photo-generated holes as the dominant reactive species. The superior performance of TS5N10 was attributed to its nanostructure, high specific surface area, strong light absorption, and reduced photoinduced electron-hole recombination. These results highlight the potential of TS5N10 for practical water treatment applications.
Investigate the Performance of Prussian White K2Fe[Fe(CN)6] Cathode for Potassium-Ion Battery Luan, Van Hoang; Quynh, Do Ngoc Nhu; Le, Minh Vien; Dat, Ly; Dat, Nguyen Tan
Indonesian Journal of Chemistry Vol 25, No 3 (2025)
Publisher : Universitas Gadjah Mada

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.22146/ijc.99310

Abstract

In this report, potassium iron(II) hexacyanoferrate (KFHCF) was synthesized via a precipitation method under a nitrogen-controlled atmosphere, followed by a comprehensive evaluation of its electrochemical properties. Various characterization techniques, including X-ray diffraction (XRD), scanning electron microscopy (SEM), Fourier-transform infrared spectroscopy (FTIR), and thermogravimetric analysis (TGA) are employed to investigate the structural and morphological properties of the materials. The electrochemical performance of the KFHCF materials was systematically evaluated through galvanostatic discharge cycling and cyclic voltammetry (CV) measurements. The results reveal that KFHCF material synthesized with a 2:1 molar ratio between EDTA and free Fe2+ ions, dried under vacuum at 100 °C for 10 h, exhibits significantly enhanced electrochemical properties compared to those with a 1:1 molar ratio. The performance was further assessed using different electrolytes, specifically K2SO4 and KCl. The KFHCF-based electrode demonstrates a peak current density of nearly 4 mA cm−2 for the redox processes of both Fe(II) coordination sites in K2SO4 or KCl aqueous electrolyte at a scan rate of 10 mV s−1. Additionally, it delivers discharge capacities of 113.97 mAh g−1 (K2SO4) and 93.45 mAh g−1 (KCl) at current densities of 500 mA g−1. These findings underscore the promising potential of KFHCF as an efficient electrode material for electrochemical applications.
Co-Authors Dat, Ly Dat, Nguyen Tan Hoang, Anh Hoang Le, Minh Vien Le, Vu Truong-Son Ngo, Manh Thang Nguyen, Hien Thao Quynh, Do Ngoc Nhu Tran, Trung Tan