Please use this identifier to cite or link to this item: https://hdl.handle.net/10356/151358
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
Authors: Wang, Hou
Sun, Yuanmiao
Wu, Yan
Tu, Wenguang
Wu, Shuyang
Yuan, Xingzhong
Zeng, Guangming
Xu, Jason Zhicuan
Li, Shuzhou
Chew, Jia Wei
Keywords: Engineering::Environmental engineering
Issue Date: 2018
Source: 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
Project: MOE2014-T2-2-074
ARC16/15
2015-T1-001-023
RG7/15
SGP-PROG3-019
Journal: Applied Catalysis B: Environmental
Abstract: 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.
URI: https://hdl.handle.net/10356/151358
ISSN: 0926-3373
DOI: 10.1016/j.apcatb.2018.12.051
Rights: © 2019 Elsevier B.V. All rights reserved.
Fulltext Permission: none
Fulltext Availability: No Fulltext
Appears in Collections:SCBE Journal Articles

Page view(s)

41
Updated on Sep 21, 2021

Google ScholarTM

Check

Altmetric


Plumx

Items in DR-NTU are protected by copyright, with all rights reserved, unless otherwise indicated.