纳米棒
异质结
材料科学
光催化
氮氧化物
可见光谱
肖特基势垒
光降解
表面等离子共振
光电子学
化学工程
光化学
纳米技术
纳米颗粒
催化作用
化学
生物化学
有机化学
二极管
工程类
燃烧
作者
Viet Van Pham,Nguyet N. T. Pham,Viet Hai Le,Cao Minh Thi
标识
DOI:10.1016/j.jece.2023.111556
摘要
Nitrogen oxides (NOx) is formed by primary emission from diesel engine vehicles. In this study, we synthesized and applied the photocatalytic effect over Mott-Schottky Ag/SnO2 nanorod heterojunctions toward NOx removal under visible light. In detail, the presence of Ag NPs in the Ag/SnO2 nanorod heterojunction, the number of electrons participating in the catalysis is enhanced due to the localized surface plasmon resonance (LSPR) of Ag NPs. In addition, the potential of the reducing region of SnO2 is also changed, thereby creating favourable conditions for the photocatalysis. We determined that 1.5% Ag/SnO2 nanorod heterojunction is the best sample with NO (500 ppb) photodegradation efficiency of 50.64% under visible light irradiation. Moreover, Ag/SnO2 nanorod heterojunction has an excellent stability after undergoing five times recycling and is highly applicable in practical applications with a high NO degradation and low NO2 conversion yield. The Mott-Schottky plots, Tauc plots, and trapping tests were used to build the energy scheme of the Ag/SnO2 heterojunction.
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