Journal
EUROPEAN JOURNAL OF INORGANIC CHEMISTRY
Volume 2020, Issue 40, Pages 3852-3858Publisher
WILEY-V C H VERLAG GMBH
DOI: 10.1002/ejic.202000635
Keywords
P-n heterojunction; CaSb2O6; g-C3N4; Photoelectrochemistry; Tetracycline
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Funding
- Basic and Frontier Re-search Project of Chongqing Science and Technology Commission [cstc2019jcyj-msxmX0187]
- Project of Scientific and Technological Research Program of Chongqing Municipal Education Commission [KJQN201801135, KJQN202001613]
- Children's Research Institute of National Center for Schooling Development Programme and Chongqing University of Education [CSDP19FS01109]
- project of Science and Technology Collaborative Innovation Platform Construction of Chongqing University of Education [2017XJPT01]
- Cultivation for National Science Foundation of Chongqing University of Education [18GZKP01]
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Despite many attempts to build g-C(3)N(4)based heterojunctions there are currently no systematic guidelines for designing such composites. Herein, we rationally designed and synthesized a novel CaSb2O6/g-C(3)N(4)2D/2D heterojunction with ideal lattice matching. The as-synthesized heterojunctions had superior visible light-driven photodegradation toward tetracycline solution compared with those of pristine g-C(3)N(4)and CaSb2O6. The corresponding maximum apparent kinetic rate constant was 0.01388 min(-1), which was approximately 2.4 and 53 times greater than those of g-C(3)N(4)and CaSb2O6, respectively. Additionally, photoelectrochemical measurements indicated that the enhanced photocatalytic performance was attributed to generation of an internal electric field by the intimate contact p-n heterojunction. The main reactive species were(center dot)OH,(center dot)O(2)(-)and h(-)are the dominate reactive species in the photocatalytic process. This study will inspire efforts to build 2D/2D heterojunction photocatalysts with efficient carrier separation and higher photocatalytic performance through structural chemistry or solid state chemistry analysis.
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