Enhanced photodegradation of tetracycline in wastewater and conversion of CO2 by solar light assisted ZnO/g-C3N4
- Authors
- Pham, Thi Huong; Tran, Man Hieu; Chu, Thi Thu Hien; Myung, Yusik; Jung, Sung Hoon; Mapari, Mitesh G.; Kim, Taeyoung
- Issue Date
- Jan-2023
- Publisher
- ACADEMIC PRESS INC ELSEVIER SCIENCE
- Keywords
- Antibiotic; CO2 conversion; ZnO photocatalyst
- Citation
- ENVIRONMENTAL RESEARCH, v.217
- Journal Title
- ENVIRONMENTAL RESEARCH
- Volume
- 217
- URI
- https://scholarworks.bwise.kr/gachon/handle/2020.sw.gachon/87080
- DOI
- 10.1016/j.envres.2022.114825
- ISSN
- 0013-9351
1096-0953
- Abstract
- Synthesized graphitic carbon nitride-based (CN) heterojunction photocatalysts are considered as a promising material for photodegradation of organic compounds and CO2 conversion. In this work, ZnO-loaded g-C3N4 (ZnO/CN) heterojunction photocatalyst was investigated for the enhanced photooxidation of tetracycline (TC) and CO2 conversion . After modification, the photocatalysts showed an improvement in the light absorption range and the photogenerated separation rate of electron/hole due to the heterojunction structure of ZnO/CN. The degradation rate of TC was found to be 92.6% within 60 min, while CO production rate was 7.68 mu mol/g/h. The rate constants of TC by using ZnO/CN were 0.0812, 0.0539, 0.0336, 0.0249, and 0.0185 min-1, corre-sponding to the TC level of 1, 10, 30, 50, and 100 mg/L, respectively. The photodegradation rate of TC by ZnO/ CN was 5 times higher than that of CN, demonstrating the advantage of heterojunction photocatalyst.The modified ZnO/CN exhibited superior degradation performance of TC and higher CO2 conversion rate than those of unmodified CN. It also exhibited high stability with 82% removal efficiency of TC at the 6th run and the CO2 conversion rate of 71% after reused 5 times. The heterojunction ZnO/CN can be utilized as an efficient material for various photocatalytic applications.
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Collections - 공과대학 > 신소재공학과 > 1. Journal Articles
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