<strong>1T/2H O-MoS<sub>2</sub>@S-pCN</strong>催化剂的制备和性能

doi:10.11901/1005.3093.2024.431

材料研究学报

2025, Vol. 39

Issue (7): 551-560 DOI: 10.11901/1005.3093.2024.431

研究论文

本期目录 | 过刊浏览

1T/2H O-MoS₂@S-pCN催化剂的制备和性能

刘志华¹^,², 王明月¹^,², 李易娟¹^,², 丘一帆¹^,², 李翔³(

), 苏伟钊¹^,²

^1.长沙理工大学水利与海洋工程学院长沙 410114
^2.洞庭湖水环境治理与生态修复湖南省重点实验室长沙 410114
^3.长沙市排水责任有限公司长沙 410015

Preparation and Photocatalytic Performance of 1T/2H O-MoS₂@S-pCN Composite Catalyst in Degradation of Hexavalent Chromium and Ciprofloxacin

LIU Zhihua¹^,², WANG Mingyue¹^,², LI Yijuan¹^,², QIU Yifan¹^,², LI Xiang³(

), SU Weizhao¹^,²

^1.School of Hydraulic and Ocean Engineering, Changsha University of Science & Technology, Changsha 410114, China
^2.Key Laboratory of Dongting Lake Aquatic Eco-Environmental Control and Restoration of Hunan Province, Changsha 410114, China
^3.Changsha Drainage Liability Co., Ltd., Changsha 410015, China

引用本文:

刘志华, 王明月, 李易娟, 丘一帆, 李翔, 苏伟钊. 1T/2H O-MoS₂@S-pCN催化剂的制备和性能[J]. 材料研究学报, 2025, 39(7): 551-560.
Zhihua LIU, Mingyue WANG, Yijuan LI, Yifan QIU, Xiang LI, Weizhao SU. Preparation and Photocatalytic Performance of 1T/2H O-MoS₂@S-pCN Composite Catalyst in Degradation of Hexavalent Chromium and Ciprofloxacin[J]. Chinese Journal of Materials Research, 2025, 39(7): 551-560.

全文: PDF(10301 KB) HTML

摘要:

用水热法在硫掺杂g-C₃N₄纳米片(S-pCN)表面原位合成1T/2H O-MoS₂@S-pCN可见光催化剂并使用XRD、XPS、FT-IR、SEM和UV-vis等手段对其表征，研究了这种催化剂的光电化学特性和和协同处理环丙沙星(CIP)和六价铬Cr(VI)的性能及其机理。结果表明，15% 1T/2H O-MoS₂@S-pCN光催化剂在2 min内对CIP的去除率为97.63%，在10 min内对Cr(VI)的去除率为96.2%。5次循环使用后，这种催化剂优异的光催化性能不变。1T/2H O-MoS₂@S-pCN光催化剂中的异质结、二硫化钼1T/2H相以及氧掺杂等因素，提高了其对可见光的响应并抑制了电子-空穴对的复合。这种催化剂去除CIP和Cr(VI)的机理是，在活性物质(h⁺、e^-、∙O $2 -$ )的作用下氧化CIP，在活性物质(e^-、∙O $2 -$ )的作用下还原Cr(VI)。

关键词 ：无机非金属材料, 1T/2H O-MoS₂@S-pCN, 光催化, 六价铬, 环丙沙星

Abstract：

A novel visible-light-driven 1T/2H O-MoS₂@S-pCN photocatalyst was synthesized in situ on sulfur-doped g-C₃N₄ nanosheets (S-pCN) via hydrothermal method with N, N-dimethylformamide (DMF) as solvent. The prepared 1T/2H O-MoS₂@S-pCN photocatalyst was characterized by means of XRD, XPS, FT-IR, SEM and UV-vis. The photoelectrochemical properties of the catalyst and the oxidation-reduction behavior of the mixture of ciprofloxacin (CIP) and hexavalent chromium (Cr(VI)) induced by the catalyst were also studied. The results showed that if 15% 1T/2H O-MoS₂@S-pCN photocatalyst was introduced into the mixed solution, the removal rate of CIP and Cr(VI) could reach 97.63% within 2 min and 96.2% within 10 min respectively. Furthermore, after five cycle of use, the excellent photocatalytic performance of the catalyst remained unchanged. The excellent performance of the photocatalyst may be attributed to the existence of heterojunctions, the 1T/2H molybdenum disulfide phase with peculiar structure and oxygen doping in the 1T/2H O-MoS₂@S-pCN photocatalyst, which could improve its visible light response and effectively inhibit the electron-hole pair recombination. The mechanism related with the removal of CIP and Cr(VI) by this catalyst may be that CIP was oxidized by active substances (h⁺, e^-, ∙O $2 -$ ), and Cr(VI) was reduced by active substances (e^-, ∙O $2 -$ ).

Key words： inorganic non-metallic materials 1T/2H O-MoS₂@S-pCN photocatalysis hexavalent chro-mium ciprofloxacin

收稿日期: 2024-10-22

ZTFLH:

X703.1

基金资助:长沙理工大学青年教师成长计划(2019QJCZ038)

通讯作者: 李翔，高级工程师，14410876@qq.com，研究方向为污水处理技术

Corresponding author: LI Xiang, Tel: 13467516628, E-mail: 14410876@qq.com

作者简介: 刘志华，男，1979年生，博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2024.431 或 https://www.cjmr.org/CN/Y2025/V39/I7/551

图1 1T/2H O-MoS2@S-pCN和S-pCN的XRD谱

图2 15% 1T/2H O-MoS2@S-pCN复合材料的XPS谱(a) S 2p (b) N 1s (c) Mo 3d (d) C 1s (e) O 1s (f) survey spectrum

图3 S-pCN和1T/2H O-MoS2@S-pCN催化剂的FT-IR谱

图4 1T/2H O-MoS2@S-pCN的SEM 形貌

图5 15% 1T/2H O-MoS2@S-pCN 的元素面分析(EPMA-WDS)

图6 S-pCN和1T/2H O-MoS2@S-pCN 的紫外漫反射谱和Tauc曲线

图7 S-pCN和1T/2H O-MoS2@S-pCN的Nyquist图和瞬态光电流

图8 S-pCN和1T/2H O-MoS2@S-pCN的Mott-Schottky图

图9 S-pCN和1T/2H O-MoS2@S-pCN光催化协同处理CIP和Cr(VI)的性能

图10 15%1T/2H O-MoS2@S-pCN光催化降解CIP和Cr(VI)的循环实验结果以及催化剂使用前后的XRD谱

图11 自由基清除剂对15% 1T/2H O-MoS2@S-pCN光催化降解的影响

图12 1T/2H O-MoS2@S-pCN光催化协同处理CIP和Cr(VI)的机理

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