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Haoyu Zhang |
Education
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Current Areas of Research
My project involves the development of artificial photosynthetic systems for conversion of solar energy into chemical energy. To construct an efficient energy conversion
system, it is necessary to create long lived and accessible photogenerated, charge-separated
species. Currently, I am working on the synthesis of a (bpy)2Ru(II) Lq
(see figure) complex as a photosensitizer as it exhibits a long-lived
luminescence due to emission from 3MLCT states.
To achieve long-lived charge separation, the back-electron-transfer (BET) reaction problem has to be overcome by anchoring the polypyridine-ruthenium moiety on the zeolite surface via a covalent bond. The electrons can be transferred from the photosensitizer on the zeolite surface to acceptors in solution through zeolite channels with the lower rate of BET. Preparation of optical transparent colloidal solutions of (bpy)2Ru(II) L-zeolite Y by using nanocrystalline zeolite allows us to use conventional optical transmission spectroscopic methods to examine electron transfer dynamics.
1. Haoyu Zhang, Yanghee Kim, Prabir K. Dutta, Controlled release of paraquat from surface-modified zeolite Y. Microporous and Mesoporous Materials 88 2006, 312–318.
2. Yanghee Kim, Amitava Das, Haoyu Zhang, and Prabir K. Dutta, Zeolite Membrane-Based Artificial Photosynthetic Assembly for Long-Lived Charge
Email group member Return to group homepageTo achieve long-lived charge separation, the back-electron-transfer (BET) reaction problem has to be overcome by anchoring the polypyridine-ruthenium moiety on the zeolite surface via a covalent bond. The electrons can be transferred from the photosensitizer on the zeolite surface to acceptors in solution through zeolite channels with the lower rate of BET. Preparation of optical transparent colloidal solutions of (bpy)2Ru(II) L-zeolite Y by using nanocrystalline zeolite allows us to use conventional optical transmission spectroscopic methods to examine electron transfer dynamics.
The current research
involves following subjects:
1. Synthesis and spectroscopic study of (bpy)2Ru(II) Lq
2. Preparation of nanocrystalline zeolite Y
3. Anchoring (bpy)2Ru(II) Lq on Nano-size zeolite Y
1. Synthesis and spectroscopic study of (bpy)2Ru(II) Lq
2. Preparation of nanocrystalline zeolite Y
3. Anchoring (bpy)2Ru(II) Lq on Nano-size zeolite Y
Publications
1. Haoyu Zhang, Yanghee Kim, Prabir K. Dutta, Controlled release of paraquat from surface-modified zeolite Y. Microporous and Mesoporous Materials 88 2006, 312–318.
2. Yanghee Kim, Amitava Das, Haoyu Zhang, and Prabir K. Dutta, Zeolite Membrane-Based Artificial Photosynthetic Assembly for Long-Lived Charge