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2D/2D p‐n Heterojunctions of CaSb2O6/g‐C3N4 for Visible Light‐Driven Photocatalytic Degradation of Tetracycline
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2020-09-16 , DOI: 10.1002/ejic.202000635 Yuanyuan Li 1 , Jinfeng Shen 1 , Wenxuan Quan 1 , Yue Diao 1 , Meijun Wu 1 , Bin Zhang 2 , Yaoqiong Wang 3 , Dingfeng Yang 3
European Journal of Inorganic Chemistry ( IF 2.2 ) Pub Date : 2020-09-16 , DOI: 10.1002/ejic.202000635 Yuanyuan Li 1 , Jinfeng Shen 1 , Wenxuan Quan 1 , Yue Diao 1 , Meijun Wu 1 , Bin Zhang 2 , Yaoqiong Wang 3 , Dingfeng Yang 3
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Despite many attempts to build g‐C3N4 based heterojunctions there are currently no systematic guidelines for designing such composites. Herein, we rationally designed and synthesized a novel CaSb2O6/g‐C3N4 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‐C3N4 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‐C3N4 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 ·OH, ·O2– 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.
中文翻译：
CaSb2O6 / g-C3N4的2D / 2D p-n异质结对可见光驱动的四环素光催化降解
尽管进行了许多尝试构建基于g‐C 3 N 4的异质结，但目前尚无用于设计此类复合材料的系统指南。在这里，我们合理地设计和合成了具有理想晶格匹配的新型CaSb 2 O 6 / g-C 3 N 4 2D / 2D异质结。与原始的g-C 3 N 4和CaSb 2 O 6相比，合成的异质结具有更好的可见光驱动的四环素溶液光降解能力。相应的最大表观动力学速率常数为0.01388 min –1，分别比g-C 3 N 4和CaSb 2 O 6高2.4倍和53倍。此外，光电化学测量表明，光催化性能的增强归因于紧密接触的p-n异质结的内部电场的产生。主要的反应物种是· OH，· O 2 –和h –是光催化过程中主要的反应物种。这项研究将激发通过结构化学或固态化学分析来构建具有有效载流子分离和更高光催化性能的2D / 2D异质结光催化剂的努力。
更新日期：2020-10-28
中文翻译：
CaSb2O6 / g-C3N4的2D / 2D p-n异质结对可见光驱动的四环素光催化降解
尽管进行了许多尝试构建基于g‐C 3 N 4的异质结，但目前尚无用于设计此类复合材料的系统指南。在这里，我们合理地设计和合成了具有理想晶格匹配的新型CaSb 2 O 6 / g-C 3 N 4 2D / 2D异质结。与原始的g-C 3 N 4和CaSb 2 O 6相比，合成的异质结具有更好的可见光驱动的四环素溶液光降解能力。相应的最大表观动力学速率常数为0.01388 min –1，分别比g-C 3 N 4和CaSb 2 O 6高2.4倍和53倍。此外，光电化学测量表明，光催化性能的增强归因于紧密接触的p-n异质结的内部电场的产生。主要的反应物种是· OH，· O 2 –和h –是光催化过程中主要的反应物种。这项研究将激发通过结构化学或固态化学分析来构建具有有效载流子分离和更高光催化性能的2D / 2D异质结光催化剂的努力。
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