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One‐Pot Polyvinyl Alcohol‐Assisted Hydrothermal Synthesis of Hierarchical Flower‐Like BiOCl Nanoplates with Enhancement of Photocatalytic Activity for Degradation of Rhodamine B
Author(s) -
Xie Yunchao,
Chang Fei,
Li Chenlu,
Chen Juan,
Luo Jieru,
Li Liang,
Hu Xuefeng
Publication year - 2014
Publication title -
clean – soil, air, water
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.444
H-Index - 66
eISSN - 1863-0669
pISSN - 1863-0650
DOI - 10.1002/clen.201300014
Subject(s) - rhodamine b , photocatalysis , polyvinyl alcohol , bismuth , diffuse reflectance infrared fourier transform , materials science , hydrothermal circulation , nuclear chemistry , chemical engineering , aqueous solution , chemistry , organic chemistry , catalysis , engineering , metallurgy , composite material
We have successfully synthesized hierarchical flower‐like bismuth oxychloride nanoplates by a polyvinyl alcohol‐assisted hydrothermal process. The as‐synthesized products were characterized by a collection of techniques, such as X‐ray diffraction, scanning electron microscopy, UV–Vis diffuse reflectance spectroscopy, and N 2 adsorption–desorption isotherms. The concentration of polyvinyl alcohol and hydrothermal time were vital effects for formation of hierarchical flower‐like bismuth oxychloride nanostructures. Rhodamine B (RhB) was selected to evaluate the photocatalytic performance of as‐synthesized samples under visible light irradiation. The degradation was undergone through a photosensitization pathway. The hierarchical flower‐like bismuth oxychloride nanoplates showed much higher RhB removal efficiency than other bismuth oxychloride samples and commercial Degussa TiO 2 . The active species trapping experiments revealed that the superoxide radicals ( O 2 −• ) were the main active species in aqueous solution. In combining with the N 2 bubbling experiment, photocatalysis mechanism was finally proposed.