Evaluation of the plasmonic effect of Au and Ag on Ti-based photocatalysts in the reduction of CO2 to CH4

作     者：Martin Dilla Anna Pougin Jennifer Strunk 

作者机构：Max-Planck-Institute for Chemical Energy conversionStiftstraße 34-3645470 Mülheim/RuhrGermany Laboratory of Industrial ChemistryRuhr-University BochumUniversitätsstraße 15044780 BochumGermany Center for Nanointegration Duisburg-EssenUniversity of Duisburg-EssenCarl-Benz-Straße 19947057 DuisburgGermany 

出 版 物：《Journal of Energy Chemistry》 (能源化学（英文版）)

年 卷 期：2017年第26卷第2期

页      面：277-283页

核心收录：

学科分类：081704[工学-应用化学] 081705[工学-工业催化] 07[理学] 070304[理学-物理化学(含∶化学物理)] 08[工学] 0817[工学-化学工程与技术] 0703[理学-化学] 

主　　题：Photocatalytic CO2 reduction Plasmon resonance Methane formation TS-1 P25 Noble metal photodeposition High-purity gas-phase photoreactor 

摘      要：Crystalline TiO（P25） and isolated titanate species in a ZSM-5 structure（TS-1） were modified with Au and Ag, respectively, and tested in the gas-phase photocatalytic COreduction under high purity conditions. The noble metal modification was performed by photodeposition. Light absorbance properties of the catalysts are examined with UV–Vis spectroscopy before and after the activity test. In the gas-phase photocatalytic COreduction, it was observed that the catalysts with Ag nanostructures are more active than those with Au nanostructures. It is thus found that the energetic difference between the band gap energy of the semiconductor and the position of the plasmon is influencing the photocatalytic ***, plasmon excitation due to visible light absorption results in plasmon resonance energy, which affects the excitation of the semiconductor positively. Therefore, an overlap between band gap energy of the semiconductor and metal plasmon is needed.