Pan, Xiaoqin Li, Dongna Fang, Yueping Liang, Zhihao Zhang, Haoran Zhang, Jin Zhong Lei, Bingfu Song, Shiwei Enhanced Photogenerated Electron Transfer in a Semiartificial Photosynthesis System Based on Highly Dispersed Titanium Oxide Nanoparticles In this study, a hybrid semiartificial photosynthesis system based on chloroplast (CLP) and titanium oxide nanoparticles (TiO<sub>2</sub> NPs) was constructed. 2,6-Dichlorophenolindophenol (DCPIP) reduction by TiO<sub>2</sub>/CLP complex and methylene blue (MB) reduction by TiO<sub>2</sub> were used to determine enhanced photogenerated electron transfer in this hybrid system. The DCPIP reduction by the TiO<sub>2</sub>/CLP complex showed the same trend as MB reduction by TiO<sub>2</sub> as a function of concentration of TiO<sub>2</sub> NPs, indicating interception of photogenerated electrons in TiO<sub>2</sub> by CLP that leads to enhanced photosynthesis efficiency. Decreased photoluminescence intensity and shortened excited-state lifetime of the TiO<sub>2</sub>/CLP complex compared to that of pure TiO<sub>2</sub> also support electron transfer from TiO<sub>2</sub> to CLP. Longer visible light absorption wavelength and increasing valence band edges reveal the narrower band gap of TiO<sub>2</sub>/CLP, which finally results in the enhanced electron transfer from TiO<sub>2</sub> to CLP. Higher ferricyanide reduction and enhanced ATP formation with the TiO<sub>2</sub>/CLP complex demonstrate the accelerated electron-transfer rate of the electron-transfer chain. This study reveals the mechanism of how TiO<sub>2</sub> interacts with CLP to enhance the photosynthesis via constructing a semiartificial photosynthesis system. ATP;Enhanced Photogenerated Electron Transfer;Dispersed Titanium Oxide Nanoparticles;Decreased photoluminescence intensity;Semiartificial Photosynthesis System;TiO 2;light absorption wavelength;semiartificial photosynthesis system;TiO 2 NPs;photogenerated electron transfer;valence band edges;CLP;titanium oxide nanoparticles;MB;support electron transfer;DCPIP 2020-02-20
    https://acs.figshare.com/articles/journal_contribution/Enhanced_Photogenerated_Electron_Transfer_in_a_Semiartificial_Photosynthesis_System_Based_on_Highly_Dispersed_Titanium_Oxide_Nanoparticles/11877903
10.1021/acs.jpclett.9b03740.s001