Synthesis of novel Z-scheme AgI/Ag/AgBr composite with enhanced visible light photocatalytic activity

By Haili Lin, Jing Cao, Bangde Luo, Benyan Xu, Shifu Chen. 2012

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Abstract Novel Z-scheme AgI/Ag/AgBr composite was synthesized through a facile in-situ ion exchange method along with light reduction. The as-prepared AgI/Ag/AgBr was characterized by XRD, SEM, DRS, XPS, EDS, BET and PL technology to study its phase structures, morphologies, optical properties, element components and surface areas. AgI/Ag/AgBr displayed excellent photocatalytic activity for the degradation of methyl orange under visible light ( λ  > 420 nm), which can be ascribed to the efficient separation of photogenerated electrons and holes through Z-scheme system composed of AgI, Ag and AgBr. The photocatalytic mechanism investigation demonstrates that •O 2 − was the main reactive species for methyl orange (MO) degradation.

Subfields: Electrical and Electronic Engineering, Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/14125112ffe7b5bd53d7fa63abdeb1419ff1b083