Au nanoparticles enhanced rutile TiO₂ nanorod bundles with high visible-light photocatalytic performance for NO oxidation

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• 作者：Dieqing Zhang ; Meicheng Wen ; Shanshan Zhang ; Peijue Liu ; Wei Zhu ; Guisheng Li ; Hexing Li
• 关键词：NO ; Oxidation ; Photocatalysis ; Rutile ; TiO2
• 刊名：Applied Catalysis B: Environmental
• 出版年：5 April, 2014
• 年：2014
• 卷：147
• 期：Complete
• 页码：610-616
• 全文大小：1840 K

文摘

A novel Au/TiO₂ visible photocatalyst with Au nanoparticles (NPs) uniformly dispersed onto rutile TiO₂ nanorod bundles was developed and used in photocatalytic NO oxidation for air cleaning. The Au NPs photosensitized TiO₂ in visible-light area via plasma effect. They also reduced photoelectron-hole recombination by accelerating electron transfer and promoted NO molecule activation via strong adsorption. The TiO₂ acted as a semiconductor photocatalyst and its nanorod bundle structure promoted light harvest by multiple reflections. Moreover, it also acted as a support to highly disperse and stabilize Au nanopaticles. These cooperative promoting effects resulted in the high activity and strong durability of Au/TiO₂ in photocatalytic NO oxidation.