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Cai J, Ren Y, Xia Y, Tao L, Wang X, Wang L, Ning P, Ma Y. Cubic structured SrTiO 3 with Ce/Cr Co-doping for photoinduced catalytic oxidation of gaseous mercury. CHEMOSPHERE 2022; 295:133828. [PMID: 35120954 DOI: 10.1016/j.chemosphere.2022.133828] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 11/10/2021] [Revised: 01/19/2022] [Accepted: 01/30/2022] [Indexed: 06/14/2023]
Abstract
A cubic SrTiO3 (STO) composite material co-doped with Ce and Cr ions was synthesized by solvothermal method. The fully characterized samples were employed as photocatalysts for the oxidation of Hg0. The co-doped samples afforded excellent catalytic removal efficiency of 98.99% using UV irradiation and 89.9% using visible light irradiation for Hg0 compared with the single-doped samples. It was found that co-doped samples had a lower electron-hole recombination rate, largest Brunauer-Emmett-Teller specific surface area, and reduced band gap. The electron spin resonance results revealed that ·O2- and ·OH were the main active species in the catalytic process. Moreover, the co-doped samples exhibited the best electron transfer rate and the highest photocurrent response intensity. The electron transfer between the elements in the co-doped sample enables it to achieve stable and efficient catalytic performance. In addition, even after five consecutive catalytic runs, the co-doped sample maintained high catalytic activity. This work highlights the potential of the perovskite-type STO materials in the photocatalytic oxidation of gaseous mercury.
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Affiliation(s)
- Jun Cai
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Yuanhang Ren
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Yi Xia
- Research Center for Analysis and Measurement, Kunming University of Science and Technology, And Analytic & Testing Research Center of Yunnan, Kunming, 650093, China
| | - Lei Tao
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
| | - Xueqian Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Langlang Wang
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Ping Ning
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China.
| | - Yixing Ma
- Faculty of Environmental Science and Engineering, Kunming University of Science and Technology, Kunming, 650500, China
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Mahapatra AD, Lee JW. Metal oxide charge transporting layers for stable high-performance perovskite solar cells. CrystEngComm 2022. [DOI: 10.1039/d2ce00825d] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
Abstract
This review summarizes the recent progress in metal oxide charge transporting layers to achieve stable high-performance perovskite solar cells.
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Affiliation(s)
- Ayon Das Mahapatra
- Department of Instrumentation and Applied Physics, Indian Institute of Science, Bangalore, Karnataka-560012, India
| | - Jin-Wook Lee
- SKKU Advanced Institute of Nanotechnology (SAINT) and Department of Nanoengineering, Sungkyunkwan University, Suwon 16419, Republic of Korea
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