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Enhanced Sonocatalytic Activity, Kinetic Analysis, and Sonocatalytic Mechanism for Silver Phosphate by Br Modifying with Ionic Liquids
Author(s) -
Zhang Shuna,
Tian Haifeng,
Zhang Shujuan,
Wu Xiaoqing,
Song Limin,
Ye Jiayi,
Wei Qingwu
Publication year - 2013
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/jace.12531
Subject(s) - radical , chemistry , scanning electron microscope , transmission electron microscopy , photoluminescence , nuclear chemistry , ionic liquid , degradation (telecommunications) , phosphate , ionic bonding , catalysis , photochemistry , ion , materials science , organic chemistry , nanotechnology , telecommunications , optoelectronics , computer science , composite material
The Ag 3 PO 4 and Ag 3 PO 4 sonocatalysts with surface enrichment of Br − anions ( Br – Ag 3 PO 4 ) were synthesized using a facile precipitate process. Various analysis, including X‐ray diffraction, transmission electron microscopy, scanning electron microscope, Brunauer–Emmett–Teller, photoluminescence (PL) spectra, and UV –Vis absorption spectra were carried out to investigate the property and structure. The effect of a variety of changing conditions on ultrasonic degradation of organic dye has been investigated. Both of them exhibited obvious activity for sonocatalytic degradation of organic dyes. However, Br – Ag 3 PO 4 sonocatalysts showed much higher activity than that of Ag 3 PO 4 . By XRD analysis, the Br − anions of the surface of Ag 3 PO 4 has been transformed into AgBr in the preparation process. The high activity could be attributed to AgBr for modifying Ag 3 PO 4 . By detecting hydroxyl radicals (· OH ) in the reactive solution, we found that AgBr on the surface of Ag 3 PO 4 can help to produce a lot of additional · OH radicals. These · OH radicals may be significant reason to improve Ag 3 PO 4 activity, which further proved the · OH radical mechanism of Ag 3 PO 4 degradation of dyes under ultrasonic radiation. In addition, kinetic analysis and sonocatalytic mechanism were discussed in detail.