Tai, Xin Hong and Lai, Chin Wei and Yang, Thomas Chung Kuang and Johan, Mohd Rafie and Lee, Kian Mun and Chen, Chia-Yun and Juan, Joon Ching (2022) Highly effective removal of volatile organic pollutants with p-n heterojunction photoreduced graphene oxide-TiO2 photocatalyst. Journal of Environmental Chemical Engineering, 10 (2). DOI https://doi.org/10.1016/j.jece.2022.107304.
Full text not available from this repository.Abstract
Volatile organic compounds (VOCs) are among the most common gaseous pollutants found indoors. Photo catalytic oxidation (PCO) is an effective technique to remove VOCs, and recently, photoreduced graphene oxide (PRGO) has emerged as a carbon-based photocatalyst. The p-n heterojunction photocatalyst composed of p-type PRGO and n-type titanium dioxide (TiO2) was synthesised via a benign and facile ultraviolet (UV)-assisted photoreduction method. The optimised PRGO-TiO2 photocatalyst (GT-12) exhibited enhanced photoactivity that removed 100% and 24.3% of VOC (50 mg/m(3) of methanol) under UV and visible light, respectively. The enhancement was due to the larger built-in potential of p-n heterojunction (+ 0.05 eV)) and smaller band gap (2.90 ? 3.15 eV) of the GT-12, which retarded the charge carrier recombination and improved light absorption, respectively. The main reactive species responsible for the photocatalytic activities were hVB+ species and ?O-2(-) radicals. This work provides new insights into the potentials of PRGO-TiO2 as a p-n heterojunction photocatalyst.
| Item Type: | Article |
|---|---|
| Funders: | Ministry of Education, Malaysia [Grant No:FRGS FP040-2021], Universiti Malaya, Malaysia [Grant No:PPSI-2020-CLUSTER-IDIG03] |
| Uncontrolled Keywords: | Photocatalysis; P-n heterojunction; Photoreduction; Volatile organic pollutants; Air remediation |
| Subjects: | Q Science > QD Chemistry |
| Divisions: | Deputy Vice Chancellor (Research & Innovation) Office > Nanotechnology & Catalysis Research Centre |
| Depositing User: | Ms. Juhaida Abd Rahim |
| Date Deposited: | 04 Oct 2023 03:15 |
| Last Modified: | 04 Oct 2023 03:15 |
| URI: | http://eprints.um.edu.my/id/eprint/43026 |
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