Controlling Pt co-catalyst loading in a WO3 quantum dot and MoS2 nanosheet composite Z-scheme system for enhanced photocatalytic H2 evolution
Controlling Pt co-catalyst loading in a WO3 quantum dot and MoS2 nanosheet composite Z-scheme system for enhanced photocatalytic H2 evolution
复制标题
控制 WO3 量子点和 MoS2 纳米片复合 Z 型系统中 Pt 助催化剂的负载量,以增强光催化产氢
DOI:
10.1088/1361-6528/ab6ab3
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发表时间:
2020-01
期刊:
影响因子:
3.5
通讯作者:
Yuanguang Zhang
中科院分区:
文献类型:
--
作者:
Xiaofeng Cui;Yu Zhou;Jian Wu;Shan Ling;Lijun Zhao;Jianli Zhang;Junwei Wang;Wei Qin;Yuanguang Zhang
A solid-state Z-scheme system, synergistic integration the advantages of various narrow band semiconductors, is consideredto be apotential strategy to develop efficient photocatalyst for operation under visible light illumination. However, the charge separation efficiency of these systems has always been reduced by disordered electron transfer between coupling semiconductors. In thiswork, we constructed a direct Z-scheme system WO3-MoS2-Pt through the loadingof WO3 quantum dots onto MoS2 nanosheets and the selective depositing of Pt co-catalyst onto MoS2. XRD, TEM, AFM and XPS, etc. were used to confirm the successful preparation of the targeted photocatalyst. This photocatalytic system showed high visible-light-driven H2 evolution activity (802.2 μmol·h-1·g-1) and good photostability. Control experiment and mechanism analysis suggested that the remarkable performance can be attributed to the heterojunction formed WO3 and MoS2 and the vectorial electron transfer (WO3→MoS2→Pt) achieved by selectively loading Pt co-catalyst.
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