异质结
范德瓦尔斯力
光催化
材料科学
二硫化钨
电子转移
分子
纳米技术
光化学
化学物理
光电子学
催化作用
化学
有机化学
冶金
作者
Pir Muhammad Ismail,Sajjad Ali,Sharafat Ali,J. Li,Min Liu,Yufei Dong,Fazal Raziq,Fazli Wahid,Guojing Li,Songliu Yuan,Xiaoqiang Wu,Jiabao Yi,Jun Song Chen,Hongtao Wang,Zhong Li,Ye Yang,Pengfei Xia,Liang Qiao
标识
DOI:10.1002/adma.202303047
摘要
Constructing Van der Waals heterojunction is a crucial strategy to achieve excellent photocatalytic activity. However, in most Van der Waals heterojunctions synthesized by ex situ assembly, electron transfer encounters huge hindrances at the interface between the two components due to the large spacing and potential barrier. Herein, a phosphate-bridged Van der Waals heterojunction of cobalt phthalocyanine (CoPc)/tungsten disulfide (WS2 ) bridged by phosphate (xCoPc-nPO4- -WS2 ) is designed and prepared by the traditional wet chemistry method. By introducing a small phosphate molecule into the interface of CoPc and WS2 , creates an electron "bridge", resulting in a compact combination and eliminating the space barrier. Therefore, the phosphate (PO4- ) bridge can serve as an efficient electron transfer channel in heterojunction and can efficiently transmit photoelectrons from WS2 to CoPc under excited states. These excited photoelectrons are captured by the catalytic central Co2+ in CoPc and subsequently convert CO2 molecules into CO and CH4 products, achieving 17-fold enhancement on the 3CoPc-0.6PO4- -WS2 sample compared to that of pure WS2 . Introducing a small molecule "bridge" to create an electron transfer channel provides a new perspective in designing efficient photocatalysts for photocatalytic CO2 reduction into valuable products.
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