- Title
- Photoelectron "bridge" in Van Der Waals Heterojunction for Enhanced Photocatalytic CO2 Conversion Under Visible Light
- Creator
- Ismail, Pir Muhammad; Ali, Sajjad; Wu, Xiaoqiang; Yi, Jiabao; Chen, Jun Song; Wang, Qingyuan; Zhong, Li; Yang, Ye; Xia, Pengfei; Qiao, Liang; Ali, Sharafat; Li, Jiahao; Liu, Min; Yan, Dong; Raziq, Fazal; Wahid, Fazli; Li, Guojing; Yuan, Shuhua
- Relation
- Advanced Materials Vol. 35, Issue 38, no. 2303047
- Publisher Link
- http://dx.doi.org/10.1002/adma.202303047
- Publisher
- Wiley-VCH Verlag GmbH & Co. KGaA
- Resource Type
- journal article
- Date
- 2023
- Description
- Constructing Van der Waals heterojunction is a crucial strategy to achieve excellent photocatalytic activity. However, in most Van der Walls 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 ) was designed and prepared by 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 can high 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.
- Subject
- Van der Waals heterojunction; photocatalytic; wet chemistry; photoelectrons
- Identifier
- http://hdl.handle.net/1959.13/1487426
- Identifier
- uon:52140
- Identifier
- ISSN:1521-4095
- Language
- eng
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