Synthesis of Nanostructured Silver/Silver Halides on Titanate Surfaces and Their Visible-Light Photocatalytic Performance

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• 作者：Yuxin Tang ; Zhelong Jiang ; Jiyang Deng ; Dangguo Gong ; Yuekun Lai ; Han Teng Tay ; Ivor Tan Kian Joo ; Teck Hua Lau ; Zhili Dong ; Zhong Chen
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2012
• 出版时间：January 25, 2012
• 年：2012
• 卷：4
• 期：1
• 页码：438-446
• 全文大小：591K
• 年卷期：v.4,no.1(January 25, 2012)
• ISSN：1944-8252

文摘

Dense and uniform silver halides AgX (X = Cl, Br, I) nanoparticles were successfully fabricated on layered titanate nanowired honeycomb (TNHC) thin films. The growth of AgX nanocrystals was carried out through two steps. Firstly, ion-exchange was employed to incorporate Ag⁺ ions into the interlayer of the titanate nanowires. Secondly, hydrogen halide (HX) solution was rapidly injected onto the ion-exchanged silver TNHC surface to generate nanosized AgX particles on TNHC films. The effect of the reaction time, solution pH, and concentration of halide anions on the morphology of the AgX photocatalysts has been studied. Followed by light-irradiation, the optimized Ag/AgX thin films exhibited excellent degradation performance under visible light because of localized surface plasmon resonance effect.

Keywords:

photocatalyst; titanate material; silver halide; visible light activity; surface plasmon resonance; ion-exchange