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Liu Q, You J, Xiong Y, Liu W, Song M, Ren J, Xue Q, Tian J, Zhang H, Wang X. Synergistic effect of interstitial phosphorus doping and MoS 2 modification over Zn 0.3Cd 0.7S for efficient photocatalytic H 2 production. J Colloid Interface Sci 2024; 675:772-782. [PMID: 39002228 DOI: 10.1016/j.jcis.2024.07.044] [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: 05/08/2024] [Revised: 06/19/2024] [Accepted: 07/05/2024] [Indexed: 07/15/2024]
Abstract
ZnxCd1-xS photocatalysts have been widely investigated due to their diverse morphologies, suitable band gaps/band edge positions, and high electronic mobility. However, the sluggish charge separation and severe charge recombination impede the application of ZnxCd1-xS for hydrogen evolution reaction (HER). Herein, doping of phosphorus (P) atoms into Zn0.3Cd0.7S has been implemented to elevate S vacancies concentration as well as tune its Fermi level to be located near the impurity level of S vacancies, prolonging the lifetime of photogenerated electrons. Moreover, P doping induces a hybridized state in the bandgap, leading to an imbalanced charge distribution and a localized built-in electric field for effective separation of photogenerated charge carriers. Further construction of intimate heterojunctions between P-Zn0.3Cd0.7S and MoS2 accelerates surface redox reaction. Benefiting from the above merits, 1 % MoS2/P-Zn0.3Cd0.7S exhibits a high hydrogen production rate of 30.65 mmol·g-1·h-1 with AQE of 22.22 % under monochromatic light at 370 nm, exceeding most ZnxCd1-xS based photocatalysts reported so far. This work opens avenues to fabricate examplary photocatalysts for solar energy conversion and beyond.
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Affiliation(s)
- Qian Liu
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China
| | - Junhua You
- School of Materials Science and Engineering, Shenyang University of Technology, Shenyang 110870, Liaoning, PR China.
| | - Ya Xiong
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China.
| | - Wendi Liu
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China
| | - Mingfang Song
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China
| | - Jiali Ren
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China
| | - Qingzhong Xue
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China.
| | - Jian Tian
- School of Materials Science and Engineering, Shandong University of Science and Technology, Qingdao 266590, Shandong, PR China.
| | - Hangzhou Zhang
- Department of Operating Theatre; Department of Orthopedics; Joint Surgery and Sports Medicine, First Affiliated Hospital of China Medical University; Shenyang Sports Medicine Clinical Medical Research Center, Shenyang 110870, Liaoning, PR China
| | - Xiaoxue Wang
- Department of Operating Theatre; Department of Orthopedics; Joint Surgery and Sports Medicine, First Affiliated Hospital of China Medical University; Shenyang Sports Medicine Clinical Medical Research Center, Shenyang 110870, Liaoning, PR China.
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Chen A, Yang X, Shen L, Zheng Y, Yang MQ. Directional Charge Pumping from Photoactive P-doped CdS to Catalytic Active Ni 2P via Funneled Bandgap and Bridged Interface for Greatly Enhanced Photocatalytic H 2 Evolution. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024; 20:e2309805. [PMID: 38287735 DOI: 10.1002/smll.202309805] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 10/28/2023] [Revised: 01/11/2024] [Indexed: 01/31/2024]
Abstract
Loading cocatalysts onto semiconductors is one of the most popular strategies to inhibit charge recombination, but the efficiency is generally hindered by the localized built-in electric field and the weakly connected interface. Here, this work designs and synthesizes a 1D P-doped CdS nanowire/Ni2P heterojunction with gradient doped P to address the challenges. In the composite, the gradient P doping not only creates a funneled bandgap structure with a built-in electric field oriented from the bulk of P-CdS to the surface, but also facilitates the formation of a tightly connected interface using the co-shared P element. Consequently, the photogenerated charge carriers are enabled to be pumped from inside to surface of the P-CdS and then smoothly across the interface to the Ni2P. The as-obtained P-CdS/Ni2P displays high visible-light-driven H2 evolution rate of ≈8265 µmol g-1 h-1, which is 336 times and 120 times as that of CdS and P-CdS, respectively. This work is anticipated to inspire more research attention for designing new gradient-doped semiconductor/cocatalyst heterojunction photocatalysts with bridged interface for efficient solar energy conversion.
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Affiliation(s)
- Aizhu Chen
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian, 350117, China
| | - Xuhui Yang
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Normal University, Fuzhou, Fujian, 350117, China
| | - Lijuan Shen
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Normal University, Fuzhou, Fujian, 350117, China
| | - Ying Zheng
- Fujian Provincial Key Laboratory of Advanced Materials Oriented Chemical Engineering, College of Chemistry and Materials Science, Fujian Normal University, Fuzhou, Fujian, 350117, China
| | - Min-Quan Yang
- Fujian Key Laboratory of Pollution Control and Resource Reuse, College of Environmental and Resource Sciences, College of Carbon Neutral Modern Industry, Fujian Normal University, Fuzhou, Fujian, 350117, China
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Ma F, Xu X, Huo C, Sun C, Li Q, Yin Z, Cao S. Dual Heterogeneous Structures Promote Electrochemical Properties and Photocatalytic Hydrogen Evolution for Inverse Opal ZnO/ZnS/Co 3O 4 Crystals. Inorg Chem 2024; 63:8782-8790. [PMID: 38691448 DOI: 10.1021/acs.inorgchem.4c00481] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/03/2024]
Abstract
Potocatalytic hydrogen evolution represnets a promising way to achieve renewable energy sources. Dual heterojunctions with an inverse opal structure are proposed for addressing fundamental challenges (low surface area, inefficient light absorption, and poor charge separation) in photocatalytic water splitting. Inverse opal structure and Co3O4 were introduced to design and synthesize a ZnO/ZnS/Co3O4 (IO-ZnO/ZnS/Co3O4) photocatalyst. Morphology characterizations and photoelectric measurements reveal that the introduction of three-dimensional (3D) structures and dual heterojunctions improves light utilization efficiency and accelerates charge separation, greatly promoting photoelectric performance. The as-prepared IO-ZnO/ZnS/Co3O4 manifests superior photocurrent density (0.49 mA/cm2), which is 4 times higher than that of IO-ZnO/ZnS due to the existence of dual heterojunctions. The result is further confirmed by an enhanced H2 production rate (153.01 μmol/g/h) in pure water. Notably, excellent cycling stability is achieved in pure water because Co3O4 can rapidly capture photogenerated holes to inhibit severe photocorrosion of ZnO/ZnS. Therefore, this work presents a new insight into inhibiting photocorrosion of metal sulfides and promoting their photoelectric performance by combining 3D structures and dual heterojunctions.
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Affiliation(s)
- Feng Ma
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Xinyang Xu
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Chen Huo
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
- Key Laboratory of Green and High-end Utilization of Salt Lake Resources, Qinghai Engineering and Technology Research Center of Comprehensive Utilization of Salt Lake Resources, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining 810008, China
| | - Chaozhong Sun
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Qing Li
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Zhengliang Yin
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
| | - Shunsheng Cao
- School of Materials Science and Engineering, Jiangsu University, Zhenjiang 212013, China
- Anhui Provincial Key Laboratory for Degradation and Monitoring of Pollution of the Environment, Fuyang Normal University, Fuyang 236037, China
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