文献类型：期刊文献

英文题名：Porous ZnIn2S4 with confined sulfur vacancies for highly efficient visible-light-driven photocatalytic H2 production

作者：Jia, Wen Li[1];Wu, Xuefeng[1];Liu, Yuanwei[1];Zhao, Jia Yue[1];Zhang, Yang[1];Liu, Peng Fei[1];Cheng, Qilin[1];Yang, Hua Gui[1]

机构：[1]East China Univ Sci & Technol, Shanghai Engn Res Ctr Hierarch Nanomat, Sch Mat Sci & Engn, Key Lab Ultrafine Mat,Minist Educ, 130 Meilong Rd, Shanghai 200237, Peoples R China

年份：2022

卷号：10

期号：48

起止页码：25586

外文期刊名：JOURNAL OF MATERIALS CHEMISTRY A

收录：;EI(收录号：20225113264857);WOS:【SCI-EXPANDED(收录号:WOS:000893973600001)】；

基金：This work was financially supported by the National Natural Science Funds for Distinguished Young Scholars (51725201), the International (Regional) Cooperation and Exchange Projects of the National Natural Science Foundation of China (51920105003), the Innovation Program of Shanghai Municipal Education Commission (E00014), the Science and Technology Commission of Shanghai Municipality (21DZ1207101, 22ZR1416400), the Shanghai Engineering Research Center of Hierarchical Nanomaterials (18DZ2252400). The authors also thank the Frontiers Science Center for Materiobiology and Dynamic Chemistry. The authors also thank the crew of the BL14W1 beamline at the Shanghai Synchrotron Radiation Facility (SSRF) for their constructive assistance with the XAFS measurements and data analyses. Additional support was provided by the Feringa Nobel Prize Scientist Joint Research Center.

语种：英文

外文关键词：Charge transfer - Hydrogen production - Indium compounds - Photocatalytic activity - Pore structure - Solar energy - Solar energy conversion - Sulfur

摘要：Ternary ZnIn2S4 (ZIS) chalcogenide is regarded as a promising candidate for photocatalytic hydrogen production performance; however, its activity is limited by the low separation efficiency and poor migration ability of photoexcited charge carriers. Herein, porous ZnIn2S4 photocatalysts with confined sulfur vacancies were successfully fabricated, alleviating the above issues that impair the hydrogen evolution rate. Due to the pore structure, the charge transfer diffusion pathway is greatly shortened. Furthermore, the sulfur vacancies can serve as electron trapped centers, which greatly suppresses the recombination of photogenerated carriers. As a result, the porous ZnIn2S4 with confined sulfur vacancies exhibits an optimum hydrogen evolution rate of up to 1537.65 +/- 118.65 mu mol h(-1) (61 506 +/- 4746 mu mol g(-1) h(-1)), which is approximately 6 times higher than that of pristine ZIS, and achieves an apparent quantum efficiency of 56.53% at 420 +/- 15 nm. This work highlights the synergistic effects of pore structure and vacancy structure for enhancing H-2 evolution performance, and further provides new ideas to design and synthesize novel photocatalysts for highly efficient solar energy conversion.