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Zhang J, Sun P, Mo Z, Zhu X, Shouquat Hossain MD, Wu G, Miao Z, Yan P, Chen Z, Xu H. Adjacent Mn site boosts photocatalytic hydrogen evolution of Mn XCd 1-XS solid solution through a dual-metal-site design. J Colloid Interface Sci 2023; 652:470-479. [PMID: 37604058 DOI: 10.1016/j.jcis.2023.08.029] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2023] [Revised: 07/26/2023] [Accepted: 08/05/2023] [Indexed: 08/23/2023]
Abstract
CdS has emerged as a possible candidate for photocatalytic hydrogen generation. However, further improvement in the performance of the Cd metal site is challenging due to limited optimization space. To solve this limitation, in this work, the Mn-Cd dual-metal photocatalyst was synthesized by a one-step solvothermal method, and the effects of different proportions of bimetals on hydrogen production activity were systematically studied. The ingenious design of the bimetallic sites enhances the carrier separation efficiency and the built-in electric field intensity, which leads to significant improvement in the photocatalytic hydrogen production performance of MCS0.19. Density functional theory (DFT) calculations confirm that the introduction of the Mn element can drive electrons through the Fermi level, resulting in enhanced conductivity of the catalyst. Meanwhile, electron channels are built between Mn and S, which speeds up the rate of electron transfer and is conducive to improving hydrogen production activity. This work provides a technical-methodological entrance to improve the photocatalytic hydrogen production performance of dual-metal S solid solutions and also promises to open a novel approach to creating high-efficiency solid solution photocatalysts.
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Affiliation(s)
- Jinyuan Zhang
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - Peipei Sun
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - Zhao Mo
- School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, PR China.
| | - Xianglin Zhu
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - M D Shouquat Hossain
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - Guanyu Wu
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China; School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Zhihuan Miao
- School of Materials Science & Engineering, Jiangsu University, Zhenjiang 212013, PR China
| | - Pengcheng Yan
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - Zhigang Chen
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China
| | - Hui Xu
- School of the Environment and Safety Engineering, Institute for Energy Research, Jiangsu University, Zhenjiang 212013, PR China.
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Guo J, Liu T, Peng H, Zheng X. Efficient Adsorption-Photocatalytic Removal of Tetracycline Hydrochloride over Octahedral MnS. Int J Mol Sci 2022; 23:ijms23169343. [PMID: 36012607 PMCID: PMC9408993 DOI: 10.3390/ijms23169343] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2022] [Revised: 08/12/2022] [Accepted: 08/18/2022] [Indexed: 11/16/2022] Open
Abstract
To disclose the effect of crystal plane on the adsorption-photocatalytic activity of MnS, octahedral MnS was prepared via the hydrothermal route to enhance the adsorption and photocatalytic efficiencies of tetracycline hydrochloride (TCH) in visible light region. The optimal MnS treated at 433 K for 16 h could remove 94.83% TCH solution of 260 mg L−1 within 180 min, and its adsorption-photocatalytic efficiency declined to 89.68% after five cycles. Its excellent adsorption-photocatalytic activity and durability were ascribed to the sufficient vacant sites of octahedral structure for TCH adsorption and the feasible band-gap structure for visible-light response. In addition, the band gap structure (1.37 eV) of MnS with a conduction band value of −0.58 eV and a valence band value of 0.79 eV was favorable for the generation of O2−, while unsuitable for the formation of OH. Hence, octahedral MnS was a potential material for the removal of antibiotics from wastewater.
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Affiliation(s)
- Jing Guo
- College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
| | - Tingting Liu
- College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China
| | - Hao Peng
- College of Chemistry and Chemical Engineering, Yangtze Normal University, Chongqing 408100, China
- Correspondence: (H.P.); (X.Z.)
| | - Xiaogang Zheng
- College of Chemistry and Chemical Engineering, Neijiang Normal University, Neijiang 641100, China
- Correspondence: (H.P.); (X.Z.)
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