One-step reduction synthesis of Ag/Ag3PO4/AgBr sub-micron composites for enhanced visible photocatalytic degradation of methyl orange

Journal Article · Wed Aug 15 04:00:00 EDT 2018 · Materials Research Bulletin

DOI:https://doi.org/10.1016/J.MATERRESBULL.2018.04.003· OSTI ID:22804085

Yu, Zhuanni ^[1]; Xu, Mengmeng ^[2]; Wang, Qiang; Sun, Xiaowei; Lan, Jing ^[1]

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1. College of Chemistry and Pharmaceutical Sciences, Qingdao Agricultural University, Qingdao 266109 (China)
2. CAS Key Laboratory of Bio-Based Materials, Qingdao Institute of Biomass Energy and Bioprocess Technology, Chinese Academy of Sciences, Qingdao 266101 (China)

Highlights: • Ag/Ag{sub 3}PO{sub 4}/AgBr photocatalysts were synthesized by a one-step reduction method. • The conditions affecting performances of the photocatalysts were optimized. • The main radicals responsible for degrading MO were investigated. • The Ag/Ag{sub 3}PO{sub 4}/AgBr photocatalyst presented excellent stability and recyclability. - Abstract: An efficient semiconductor composite, silver/silver orthophosphate/silver bromide, was successfully synthesized by a facile one-step reduction and ion exchange process. Its crystal structure, morphology, optical property, surface element composition were characterized by X-ray diffraction, scanning electron microscopy, ultraviolet-visible diffuse reflectance spectrometer and X-ray photoelectron spectrometer. The effects of composite proportion and synthesis duration on performances of as-prepared photocatalysts were investigated, and the results showed that Br/P molar ratio of 3 and the synthesis duration of 4 h were the optimum conditions. The radical scavenging experiments indicated that the hole and superoxide radical were the main active species in this reaction system. The Ag/Ag{sub 3}PO{sub 4}/AgBr-3 presented excellent stability and recyclability, maintaining 92% of degradation efficiency after 5 cycles. The good photocatalysis performance could be attributed to the formation of the heterojunction between Ag and Ag{sub 3}PO{sub 4}/AgBr.

• OSTI ID: 22804085
• Journal Information: Materials Research Bulletin, Journal Name: Materials Research Bulletin Vol. 104; ISSN MRBUAC; ISSN 0025-5408
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
CRYSTAL STRUCTURE
HETEROJUNCTIONS
ION EXCHANGE
METHYL ORANGE
MORPHOLOGY
OPTICAL PROPERTIES
PHOTOCATALYSIS
SCANNING ELECTRON MICROSCOPY
SCAVENGING
SEMICONDUCTOR MATERIALS
SILVER
SILVER BROMIDES
SILVER PHOSPHATES
SUPEROXIDE RADICALS
SYNTHESIS
ULTRAVIOLET RADIATION
X-RAY DIFFRACTION
X-RAY PHOTOELECTRON SPECTROSCOPY