Citation: Hang Zhao, Zhangqian Liang, Xiang Liu, Pengyuan Qiu, Hongzhi Cui, Jian Tian. Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO₂ microspheres for efficient full solar spectrum photocatalytic oxygen evolution[J]. Chinese Journal of Catalysis, ;2020, 41(2): 333-340. doi: S1872-2067(19)63428-5 shu

Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO₂ microspheres for efficient full solar spectrum photocatalytic oxygen evolution

School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shangdong, China

Received Date: 20 April 2019
Revised Date: 16 May 2019

Fund Project: The authors are thankful for fundings from the National Natural Science Foundation of China (51872173 and 51772176), Taishan Scholarship of Young Scholars (tsqn201812068), Natural Science Foundation of Shandong Province (ZR2017JL020), Taishan Scholarship of Climbing Plan (tspd20161006), and Key Research and Development Program of Shandong Province (2018GGX102028).

Herein, novel plasmonic Bi metal in situ deposited in reduced TiO₂ microspheres (Bi@R-TiO₂) are fabricated via a bimetallic MOF-derived synthesized strategy by adjusting the synthesizing temperature. Different characterization techniques, including XRD, SEM, TEM, XPS, DRS, PL, EIS, and photocurrent generation, are performed to investigate the structural and optical properties of the as-prepared samples. The results indicate that the Bi particles are generated inside and outside of reduced TiO₂ microspheres via the reduction of Ti⁴⁺ and Bi³⁺ by ethylene glycol. When the annealing temperature is controlled at 300 ℃, the corresponding Bi@R-TiO₂-300 sample with an appropriate amount of Bi nanoparticles exhibits the highest full solar spectrum photocatalytic oxygen evolution activity (4728.709 μmol h^-1 g^-1), which is 5.9 and 9.5 times higher than that of pure TiO₂ and Bi-Ti bimetal organic frameworks (Bi-Ti-MOFs). Several reasons are suggested for the above results:(1) Bi metal behaves as an "electron acceptor" to accelerate the charge carrier transfer from TiO₂ to Bi; (2) The surface plasmon resonance effect of loaded metallic Bi particles can enhance the visible and NIR light absorption capacity; (3) The generation of Ti³⁺ further narrows the band gap of TiO₂.
- Bi nanoparticles,
- Full solar spectrum,
- O₂ evolution,
- Photocatalysis,
- Porous microspheres
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Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO2 microspheres for efficient full solar spectrum photocatalytic oxygen evolution

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通讯作者: 陈斌, bchen63@163.com

Noble metal-like behavior of plasmonic Bi particles deposited on reduced TiO₂ microspheres for efficient full solar spectrum photocatalytic oxygen evolution