Journal
SUSTAINABLE CHEMISTRY AND PHARMACY
Volume 25, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.scp.2021.100596
Keywords
Plasmonic-induced photocatalysis; Heterojunction; g-C3N4; Nitric oxide removal; Silver
Categories
Funding
- Chung Yuan Christian University, Taiwan [109609432]
- Department of Civil Engineering Chung Yuan Christian University, Taoyuan City, Taiwan
- Department of Environmental Engineering, Chung Yuan Christian University, Taoyuan City, Taiwan
- Center for Environmental Risk Management, Chung Yuan Christian University, Taoyuan City, Taiwan
- Center for Environmental Toxin and EmergingContaminant Research, Cheng Shiu University, Kaohsiung, Taiwan, ROC
- Faculty of Materials Science and Technology, University of Science, VNU-HCM, Ho Chi Minh City, Vietnam
- Vietnam National University -Ho Chi Minh City, Linh Trung Ward, Thu Duc District, Ho Chi Minh City, Vietnam
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In this study, Ag/g-C3N4 heterojunctions were fabricated by a photo-reduction approach, with Ag nanoparticles deposited on g-C3N4. Compared with g-C3N4, the photocatalytic NO removal efficiency of 20% Ag/g-C3N4 increased to 80% and displayed excellent stability.
Nitric oxide (NO) pollution presents a pressing issue in preserving the air quality for sustainable development. It is highly desirable to employ robust photocatalytic materials for addressing NO pollution in an energy-efficient fashion. Here, Ag/g-C3N4 heterojunctions are successfully fabricated via a photo-reduction approach. Ag nanoparticles are deposited on g-C3N4, having an average diameter of 8.45 nm. Upon incorporating Ag species, the energy band gap of g-C3N4 is reduced from 2.76 to 2.70 eV. Compared with g-C3N4, the photocatalytic NO removal efficiency of 20% Ag/g-C3N4 is increased to 80% because of the enhanced quantum efficiency (14 x 10(-4)%). After five recycling runs, the 20% Ag/g-C3N4 heterojunction still presents an excellent performance, representing a highly stable photocatalytic material. The critical contribution of O-2 over line and holes during the photocatalytic processes are also studied using radical trapping experiments. Our work offers a simple but scalable approach for generating high-performance photocatalytic materials, potentially enabling efficient removal of NO pollution without extensive energy consumption.
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