Defect-mediated Z-scheme carriers’ dynamics of C-ZnO/A-CN toward highly enhanced photocatalytic TC degradation
Defect-mediated Z-scheme carriers’ dynamics of C-ZnO/A-CN toward highly enhanced photocatalytic TC degradation
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缺陷介导的 Z 型载流子 – C-ZnO/A-CN 的动力学,可实现高度增强的光催化 TC 降解
DOI:
10.1016/j.jallcom.2021.160321
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发表时间:
2021-10
影响因子:
6.2
通讯作者:
Fengpo Yan
中科院分区:
文献类型:
--
作者:
Xiaoyan Huang;Xiuyun Zhang;Kexiang Zhang;Xiaogang Xue;Jian Xiong;Yu Huang;Doudou Zhang;Jian Zhang;Zheling Zhang;Fengpo Yan
Constructing Z-scheme photocatalysts is a promising strategy to improve the photocatalytic performance of materials, wherein carriers’ recombination plays a critical role by tuning carrier transportation and separation. In this study, a defect mediated layered heterojunction of amorphous carbon nitride (A-CN) and carbon doped ZnO (C-ZnO) are designed by calcination of ZIF-8 immersed urea. TEM and SEM elucidate the 2D heterojunctions coupled C-ZnO with a sheet-like A-CN that was formed. FTIR and XPS confirm the existence single bondNsingle bondCtriple bondN and single bondNdouble bondCdouble bondNsingle bond groups interacted with C-ZnO. The defect-mediated C-ZnO/A-CN with 75% A-CN exhibited the highest tetracycline hydrochloride (TC) degradation rate, ~7.7, 3.0 and 7.7 times that of ZnO, loaded ZnO+CN or CN, respectively. Transient PL and photochemical characterizations revealed that defects assisted carriers’ recombination leads to a strong Z-scheme interfacial charge transfer and more reactive centers for TC degradation. This work would provide a new insight for the design of Z-scheme photocatalysts for the removal of pollutants.
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