Facile preparation of ternary Ag₂CO₃/Ag/PANI composite nanorods with enhanced photoactivity and stability

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• 作者：Fang Chen ; Yadan Wu ; Jiqiang Ning ; Jiabin Ren ; Ziyang Zhang…
• 刊名：Journal of Materials Science
• 出版年：2017
• 出版时间：April 2017
• 年：2017
• 卷：52
• 期：8
• 页码：4521-4531
• 全文大小：
• 刊物类别：Chemistry and Materials Science
• 刊物主题：Materials Science, general; Characterization and Evaluation of Materials; Polymer Sciences; Continuum Mechanics and Mechanics of Materials; Crystallography and Scattering Methods; Classical Mechanics;
• 出版者：Springer US
• ISSN：1573-4803
• 卷排序：52

文摘

One-dimensional ternary nanostructures, Ag₂CO₃ nanorod cores coated with an intermediate layer of Ag nanoparticles (NPs) and a sheath of conducting polymer polyaniline (PANI), Ag₂CO₃/Ag/PANI composite nanorods (CNRs), were successfully prepared via a facile two-step method. Ag NPs were first uniformly anchored onto the Ag₂CO₃ nanorods to form binary Ag₂CO₃/Ag CNRs with an in situ visible-light-induced reduction strategy, and then the Ag₂CO₃/Ag CNRs were coated with PANI of different contents through a simple chemisorption approach. The as-obtained hybrids exhibit significantly enhanced photoelectrochemical current response and photoactivity in degrading methyl orange under visible-light illumination (λ > 420 nm). The improved photoactivity was found to be related to the intermediate Ag between Ag₂CO₃ and PANI which facilitates the separation efficiency of photogenerated carriers, and an optimal weight percent of 2.0% PANI was observed. The origin of enhanced photoactivity was further investigated by a radical-trapping test, and a Z-scheme mechanism was proposed to explain the charge separation behaviors.