High-efficiency visible-light AgI/Ag/Bi2MoO6 as a Z-scheme photocatalyst for environmental applications. Issue 13 (26th January 2016)

• Record Type: Journal Article
• Authors: Wang, Yin; Niu, Cheng-Gang; Zhang, Lei; Wang, Ying; Zhang, Huan; Huang, Da-Wei; Zhang, Xue-Gang; Wang, Liang; Zeng, Guang-Ming
• Is Part Of: RSC advances. Volume 6:Issue 13(2016)
• Page Start: 10221
• Page End: 10228
• Publication Date: 2016-01-26
• Subjects: Chemistry -- Periodicals; 540.5
• DOI: 10.1039/c5ra23736j
• Languages: English
• ISSNs: 2046-2069

Abstract

Abstract : A novel ternary composite AgI/Ag/Bi2 MoO6 photocatalyst was successfully synthesized by a facile hydrothermal method combined with an ultrasonic-assisted precipitation-photoreduction technique. Abstract : A novel ternary composite AgI/Ag/Bi2 MoO6 photocatalyst was successfully synthesized by a facile hydrothermal method combined with an ultrasonic-assisted precipitation-photoreduction technique. X-ray diffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM), UV-vis diffuse reflectance spectroscopy (DRS) and photoluminescence emission spectra (PL) analysis were employed to characterize the composition, phase structures, crystallinity, morphologies and optical properties of the obtained catalysts. The experimental results indicated that the AgI/Ag/Bi2 MoO6 (15.0%) composite display higher visible light photoactivity for organic pollutants degradation compared with pure Bi2 MoO6 and Ag/AgI nanocrystals. On the basis of band structure analysis and active species trapping experimental results, the excellent photocatalytic performance of the AgI/Ag/Bi2 MoO6 photocatalysts can be ascribed to the efficient electron transfer and lower recombination of photogenerated electron–hole pairs through the Z-scheme system. And the Ag nanoparticles act as the charge transmission bridge in the process. The physicochemical features and high degradation efficiencies were maintained after five cycling experiment, indicating that the samples exhibited good durability and stability. It is expected that the novel AgI/Ag/Bi2 MoO6 hybrid is a promising candidate material for the environmental applications.