Directional Electron Transfer across In2S3/ZnS-Embedded Photocatalytic MembranesClick to copy article linkArticle link copied!
- Yiseul YuYiseul YuRadiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United StatesResearch Institute for Green Energy Convergence Technology, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of KoreaMore by Yiseul Yu
- Anthony KipkorirAnthony KipkorirRadiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United StatesDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United StatesMore by Anthony Kipkorir
- Myong Yong Choi*Myong Yong Choi*Email: [email protected]Core-Facility Center for Photochemistry & Nanomaterials, Department of Chemistry (BK21 FOUR), Research Institute of Natural Sciences, Gyeongsang National University, Jinju 52828, Republic of KoreaMore by Myong Yong Choi
- Prashant V. Kamat*Prashant V. Kamat*Email: [email protected]Radiation Laboratory, University of Notre Dame, Notre Dame, Indiana 46556, United StatesDepartment of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, United StatesMore by Prashant V. Kamat
Abstract
Photocatalytic membranes prepared with semiconductor nanoparticles embedded in a polymer film offer a convenient approach to direct the electron and hole flow and separate reduction and oxidation products. We have now embedded In2S3 and ZnS semiconductor nanoparticles in a Nafion membrane to induce photocatalytic reactions using visible light. In addition, we incorporated a viologen redox relay within the membrane to facilitate electron transfer to thionine (TH) dissolved in water. By inserting the photocatalytic membrane in a H-cell, we can separate the oxidation and reduction products and track the electron flow using steady-state photolysis and transient absorption spectroscopy. The enhanced charge separation in the In2S3 and ZnS heterostructure at 50:50 loading allowed us to maximize the electron-transfer yield. Directing such vectorial charge transfer in a photocatalytic membrane will be useful in suppressing undesired side reactions (e.g., re-oxidation of a reduced product) and facilitating product separation.
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This article is cited by 7 publications.
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