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Duyen P.H. Tran,Minh-Thuan Pham,Ya-Fen Wang,Sheng-Jie You 한국공업화학회 2023 Journal of Industrial and Engineering Chemistry Vol.127 No.-
Nowadays, photocatalysis has attracted much attention due to its ability to degrade NO at low concentrations,combined with a cheap, sustainable, and environmentally friendly process. Recent studies highlightszinc oxide nanorods (ZnO NRs) may be applied as potential photocatalysts due to their efficientcharge transport, and high performance. In this study, a high surface area of ZnO NRs was achieved viaa one-step solvothermal method with control of reaction time and temperature. Additionally, the synthesizedZnO NRs was deployed to comprehensively evaluate the photocatalytic activity of NO degradation. The results indicated that the synthesized ZnO NRs at 100 C for 6 hours exhibited the most favorableperformance in term of photocatalytic NO degradation (78.8% under solar light and 62.2 % under visiblelight), along with low toxicity (DeNOx index of 268.4). The improved photocatalytic efficiency of thesesamples can be attributed to their high aspect ratio and the presence of oxygen defects, which effectivelycapture and impede the recombination of photogenerated electrons. Furthermore, the ZnO NRs possesshigh stability under visible light irradiation, experiencing only an 8.7 % reduction after five reuses. Finally, trapping experiments and ESR analysis were used to explore the mechanism of the photocatalyticNO degradation reaction.
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