Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation

Exploring new hybridized catalysts for synergistically promoting the photocatalytic efficiency hold great challenges in solar-to-chemical energy conversion and environmental remediation. Hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids have been rationally constructed using Ti3C2(O, OH)x as a two-dimensi...

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Main Authors: Wang, Hou, Sun, Yuanmiao, Wu, Yan, Tu, Wenguang, Wu, Shuyang, Yuan, Xingzhong, Zeng, Guangming, Xu, Jason Zhichuan, Li, Shuzhou, Chew, Jia Wei
Other Authors: School of Chemical and Biomedical Engineering
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Language:English
Published: 2021
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Online Access:https://hdl.handle.net/10356/151358
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spelling sg-ntu-dr.10356-1513582022-08-05T06:24:25Z Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation Wang, Hou Sun, Yuanmiao Wu, Yan Tu, Wenguang Wu, Shuyang Yuan, Xingzhong Zeng, Guangming Xu, Jason Zhichuan Li, Shuzhou Chew, Jia Wei School of Chemical and Biomedical Engineering School of Materials Science and Engineering Singapore Membrane Technology Centre Nanyang Environment and Water Research Institute Engineering::Environmental engineering Solar Conversion Interface Exploring new hybridized catalysts for synergistically promoting the photocatalytic efficiency hold great challenges in solar-to-chemical energy conversion and environmental remediation. Hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids have been rationally constructed using Ti3C2(O, OH)x as a two-dimensional platform for in situ growth of flower-like Zn2In2S5 microsphere under anaerobically hydrothermal conditions. Upon exposure to visible light, the Zn2In2S5/Ti3C2(O, OH)x hybrids with the Ti3C2(O, OH)x content of 1.5% (by mass) had hydrogen generation yields of 12,983.8 μmol g−1, which was significantly better than that of pure Zn2In2S5. The apparent quantum efficiency reached 8.96% at 420 nm. Furthermore, the photocatalytic tetracycline removal rate was ˜1.25 times higher than that of pure Zn2In2S5, and can be further improved with the increase of temperature in the range of 35–55 °C. Excellent photocatalytic activity originated from the synergistic effects between visible-light-active Zn2In2S5 and conductive Ti3C2(O, OH)x for spatial electrical promotion. The photogenerated-electrons transfer efficiency from Zn2In2S5 to Ti3C2(O, OH)x was 33.0%. In accordance with spectroscopic, electrochemical, and density functional theory studies, we proposed that the interfacial-built-in quasi-alloying effect between ZIS and Ti3C2(O, OH)x culminated in notable charge redistribution, which thereby facilitated the spatial separation and transfer of photogenerated electron-hole pairs. This work revealed the underlying photo-excited charge transfer between metallic compound and semiconductor. Economic Development Board (EDB) Enterprise Singapore Ministry of Education (MOE) The authors gratefully acknowledge the financial support provided by the Singapore Ministry of Education Academic Research Funds Tier 2 (MOE2014-T2-2-074; ARC16/15) and Tier 1 (2015-T1-001-023; RG7/15), the GSK (GlaxoSmithKline) – EDB (Economic Development Board) Trust Fund, and the Joint Singapore-Germany Research Project Fund (SGP-PROG3-019). We also acknowledge funding from the Projects of the National Nature Science Foundation of China (No. 21776066, 51708195). Hou Wang, Yuanmiao Sun and Yan Wu contributed equally to this work. 2021-07-09T02:07:40Z 2021-07-09T02:07:40Z 2018 Journal Article Wang, H., Sun, Y., Wu, Y., Tu, W., Wu, S., Yuan, X., Zeng, G., Xu, J. Z., Li, S. & Chew, J. W. (2018). Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation. Applied Catalysis B: Environmental, 245, 290-301. https://dx.doi.org/10.1016/j.apcatb.2018.12.051 0926-3373 0000-0002-0800-9777 0000-0002-6603-1649 https://hdl.handle.net/10356/151358 10.1016/j.apcatb.2018.12.051 2-s2.0-85059376025 245 290 301 en MOE2014-T2-2-074 ARC16/15 2015-T1-001-023 RG7/15 SGP-PROG3-019 Applied Catalysis B: Environmental © 2019 Elsevier B.V. All rights reserved.
institution Nanyang Technological University
building NTU Library
continent Asia
country Singapore
Singapore
content_provider NTU Library
collection DR-NTU
language English
topic Engineering::Environmental engineering
Solar Conversion
Interface
spellingShingle Engineering::Environmental engineering
Solar Conversion
Interface
Wang, Hou
Sun, Yuanmiao
Wu, Yan
Tu, Wenguang
Wu, Shuyang
Yuan, Xingzhong
Zeng, Guangming
Xu, Jason Zhichuan
Li, Shuzhou
Chew, Jia Wei
Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
description Exploring new hybridized catalysts for synergistically promoting the photocatalytic efficiency hold great challenges in solar-to-chemical energy conversion and environmental remediation. Hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids have been rationally constructed using Ti3C2(O, OH)x as a two-dimensional platform for in situ growth of flower-like Zn2In2S5 microsphere under anaerobically hydrothermal conditions. Upon exposure to visible light, the Zn2In2S5/Ti3C2(O, OH)x hybrids with the Ti3C2(O, OH)x content of 1.5% (by mass) had hydrogen generation yields of 12,983.8 μmol g−1, which was significantly better than that of pure Zn2In2S5. The apparent quantum efficiency reached 8.96% at 420 nm. Furthermore, the photocatalytic tetracycline removal rate was ˜1.25 times higher than that of pure Zn2In2S5, and can be further improved with the increase of temperature in the range of 35–55 °C. Excellent photocatalytic activity originated from the synergistic effects between visible-light-active Zn2In2S5 and conductive Ti3C2(O, OH)x for spatial electrical promotion. The photogenerated-electrons transfer efficiency from Zn2In2S5 to Ti3C2(O, OH)x was 33.0%. In accordance with spectroscopic, electrochemical, and density functional theory studies, we proposed that the interfacial-built-in quasi-alloying effect between ZIS and Ti3C2(O, OH)x culminated in notable charge redistribution, which thereby facilitated the spatial separation and transfer of photogenerated electron-hole pairs. This work revealed the underlying photo-excited charge transfer between metallic compound and semiconductor.
author2 School of Chemical and Biomedical Engineering
author_facet School of Chemical and Biomedical Engineering
Wang, Hou
Sun, Yuanmiao
Wu, Yan
Tu, Wenguang
Wu, Shuyang
Yuan, Xingzhong
Zeng, Guangming
Xu, Jason Zhichuan
Li, Shuzhou
Chew, Jia Wei
format Article
author Wang, Hou
Sun, Yuanmiao
Wu, Yan
Tu, Wenguang
Wu, Shuyang
Yuan, Xingzhong
Zeng, Guangming
Xu, Jason Zhichuan
Li, Shuzhou
Chew, Jia Wei
author_sort Wang, Hou
title Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
title_short Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
title_full Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
title_fullStr Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
title_full_unstemmed Electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical Zn2In2S5/Ti3C2(O, OH)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
title_sort electrical promotion of spatially photoinduced charge separation via interfacial-built-in quasi-alloying effect in hierarchical zn2in2s5/ti3c2(o, oh)x hybrids toward efficient photocatalytic hydrogen evolution and environmental remediation
publishDate 2021
url https://hdl.handle.net/10356/151358
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