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Solvent‐Free Synthesis of Bismuth Oxychloride Microflower/Nanosheet Homojunctions for Photoactivity Enhancement
Author(s) -
Yao Hanyu,
Li Haiping,
Hu Tingxia,
Hou Wanguo
Publication year - 2018
Publication title -
chemcatchem
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.497
H-Index - 106
eISSN - 1867-3899
pISSN - 1867-3880
DOI - 10.1002/cctc.201800357
Subject(s) - bismuth , materials science , nanosheet , solvent , chemical engineering , nanotechnology , fabrication , homojunction , doping , optoelectronics , chemistry , organic chemistry , metallurgy , medicine , alternative medicine , pathology , engineering
Solvent‐free synthesis of bismuth‐based photocatalysts with hierarchical architectures has been rarely reported yet. Herein, BiOCl hierarchical microflowers (MFs) were prepared via a solvent‐free route for the first time, using chlorobutanol as the chlorine source. The reaction temperature ( T ) plays a key role for formation of MFs. The MFs were formed at T >120 °C and some MFs merged into large nanosheets (LNs). MF/LN homojunctions were constructed because considerable differences in sizes and exposed facets between the MFs and the LNs cause differences in their energy band levels. The sample prepared at 120 °C possesses the highest contents of MFs and homojunctions, specific surface area ( S BET , 13 m 2 g −1 ), and photoactivity, indicating the high photoactivity of the sample arises from fabrication of homojunctions as well as the high S BET . This work provides a solvent‐free way to simultaneously synthesize BiOCl MFs and homojunctions, which paves an avenue for solvent‐free synthesis of other photocatalysts.