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One dimensional hierarchical BiOCl microrods: The synthesis and their photocatalytic performance

Abstract

As the photocatalytic properties of semiconductors are strongly dependent on their crystal morphologies and structural features at the nanometer level, optimization and control of the structural properties of a given semiconductor is crucial for enhancing its photocatalytic performance. In this work, one dimensional hierarchical BiOCl microrods were controlled synthesized via hydrothermal method using sodium citrate as structure-agent. Each hierarchical BiOCl structure is made of many BiOCl nanosheets which size and thickness is controlled by the concentration of sodium citrate. The HRTEM measurement shows each nanosheet made of BiOCl hierarchical structure exposes (001) facet (top surface) and (110) facet (side surface). With the amounts of sodium citrate increasing, the ratio of (110)/(001) gradually increases. These hierarchical BiOCl architectures exhibit more outstanding photocatalytic activity than BiOCl nanosheets with exposed (001) facets, and RhB and MO can be degraded in 3 and 4 min, respectively. This enhanced potocataltytic performance is ascribed to the fast separation and transfer of photogenerated electron-hole pairs, the formation of hierarchical architectures and large BET surface areas. Radical scavenger experiments indicate that holes (h+) and superoxide radicals (•O2−) are the main active species for MO degradation during the photocatalytic process.

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Publication details

The article was received on 01 Sep 2018, accepted on 03 Nov 2018 and first published on 05 Nov 2018


Article type: Paper
DOI: 10.1039/C8CE01481G
Citation: CrystEngComm, 2018, Accepted Manuscript
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    One dimensional hierarchical BiOCl microrods: The synthesis and their photocatalytic performance

    Y. peng, Y. G. mao and P. F. kan, CrystEngComm, 2018, Accepted Manuscript , DOI: 10.1039/C8CE01481G

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