Influence of Preparation Process Parameters on Relative Amount of Two-phase 1T/2H and Performance of WS2

doi:10.11901/1005.3093.2023.488

Chinese Journal of Materials Research

2024, Vol. 38

Issue (10): 791-800 DOI: 10.11901/1005.3093.2023.488

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Influence of Preparation Process Parameters on Relative Amount of Two-phase 1T/2H and Performance of WS₂

REN Xuechang, YANG Zhenyu(

), FENG Hao, AN Ju, CAO Pengfei, FU Ning

School of Environmental and Municipal Engineering, Lanzhou Jiaotong University, Lanzhou 730070, China

Cite this article:

REN Xuechang, YANG Zhenyu, FENG Hao, AN Ju, CAO Pengfei, FU Ning. Influence of Preparation Process Parameters on Relative Amount of Two-phase 1T/2H and Performance of WS₂. Chinese Journal of Materials Research, 2024, 38(10): 791-800.

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Abstract

Transitional metal dichalcogenides (TMDs) materials have attracted great interest as a potential multifunctional material. However, the synthesis method of 1T-WS₂ is limited and complex. In this paper, 1T/2H phase WS₂ nanomaterials were prepared by a simple solvothermal method. For the first time, the content of 1T phase in WS₂ could be adjusted by controlling the ratio of WCl₆/TAA in the precursor and the reaction temperature. The effect of reaction conditions on the content of 1T phase in the product was confirmed by XRD, XPS and SEM, while the co-catalytic degradation test result confirmed that W-200 (W-12) had the best co-catalytic effect. Finally, TEM and Raman spectroscopy confirmed that W-200 had the best content of the 1T phase. By comparing the state of the material before and after the reaction, it is proved that sulfur vacancies will be generated during the use of WS₂ and it has excellent recyclability.

Key words: metallic materials transition metal sulfides 1T/2H-WS₂ sulfur vacancies

Received: 07 October 2023

ZTFLH:

TB31

Fund: the Young Scholars Science Foundation of Lanzhou Jiaotong University(2022044);Education Science and Technology Innovation Project of Gansu Province(2023CXZX-562)

Corresponding Authors: YANG Zhenyu, Tel: 17693109113, E-mail: 657501365@qq.com

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	REN Xuechang
	YANG Zhenyu
	FENG Hao
	AN Ju
	CAO Pengfei
	FU Ning

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https://www.cjmr.org/EN/10.11901/1005.3093.2023.488 OR https://www.cjmr.org/EN/Y2024/V38/I10/791

Fig.1 WS₂ XRD patterns under different WCl₆/TAA preparation conditions

Fig.2 SEM images of WS₂ under different WCl₆/TAA ratios (a) 1:6, (b) 1:9, (c) 1:12, (d) 1:15

Fig.3 XPS spectra of WS₂ under different conditions XPS spectra of W (a) and XPS spectra of S (b)

Fig.4 Co-catalytic degradation performance (a) andreaction rate constant of WS₂ for phenol (b) under different WCl₆/TAA ratios

Fig.5 XRD patterns of WS₂ prepared at different temperatures

Fig.6 SEM images of WS₂ at different temperatures (a) 160^oC, (b) 180^oC, (c) 200^oC, (d~f) 220^oC

Fig.7 XPS spectra of WS₂ at the same temperature (a) XPS spectra of W, (b) XPS spectra of S

Fig.8 Co-catalytic degradation performance (a) and reaction rate constant (b) of WS₂ for phenol under different temperatures

Fig.9 EDS image of W-200

Fig.10 High resolution projection image of W-200 (a, b) and its lattice spacing (c)

Fig.11 Raman spectra of W-200

Fig.12 SEM images of W-200 before (a) and after (b) reaction

Fig.13 XRD patterns (a), Raman spectra (b) and XPS (c, d) of W-200 before and after reaction

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