g-C3N4/Ag/TiO2 NTs的制备及其对西维因的光催化降解

doi:10.11901/1005.3093.2021.139

材料研究学报

2022, Vol. 36

Issue (5): 392-400 DOI: 10.11901/1005.3093.2021.139

研究论文

本期目录 | 过刊浏览

g-C₃N₄/Ag/TiO₂NTs的制备及其对西维因的光催化降解

谭冲¹, 李媛媛¹, 王欢欢¹, 李俊生², 夏至², 左金龙²(

), 姚琳³

^1.哈尔滨商业大学药学院(药物工程技术研究中心) 哈尔滨 150076
^2.哈尔滨商业大学食品工程学院哈尔滨 150076
^3.哈尔滨师范大学生命科学与技术学院哈尔滨 150025

Preparation of g-C₃N₄/Ag/TiO₂ NTs and Photocatalytic Degradation of Ceftazidine

TAN Chong¹, LI Yuanyuan¹, WANG Huanhuan¹, LI Junsheng², XIA Zhi², ZUO Jinlong²(

), YAO Lin³

^1.School of Pharmacy (Pharmaceutical Engineering Technology Research Center), Harbin University of Commerce, Harbin 150076, China
^2.School of Food Science and Engineering, Harbin University of Commerce, Harbin 150076, China
^3.College of Life Science and Technology, Harbin Normal University, Harbin 150025, China

引用本文:

谭冲, 李媛媛, 王欢欢, 李俊生, 夏至, 左金龙, 姚琳. g-C₃N₄/Ag/TiO₂NTs的制备及其对西维因的光催化降解[J]. 材料研究学报, 2022, 36(5): 392-400.
Chong TAN, Yuanyuan LI, Huanhuan WANG, Junsheng LI, Zhi XIA, Jinlong ZUO, Lin YAO. Preparation of g-C₃N₄/Ag/TiO₂ NTs and Photocatalytic Degradation of Ceftazidine[J]. Chinese Journal of Materials Research, 2022, 36(5): 392-400.

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摘要:

采用阳极氧化法制备二氧化钛纳米管(TiO₂ NTs),然后在紫外光和微波辅助下引入Ag、g-C₃N₄制备出g-C₃N₄/Ag/TiO₂ NTs三元复合光催化材料。用扫描电镜(SEM)、X-射线衍射(XRD)、X-射线光电子能谱(XPS)、紫外-可见漫反射光谱(UV-Vis)、光致发光(PL)等手段对g-C₃N₄/Ag/TiO₂ NTs进行表征,研究了这种材料对西维因的降解性能。结果表明,在模拟太阳光照射下,g-C₃N₄/Ag/TiO₂NTs对西维因的降解率由TiO₂ NTs的29.1%提高到51.8%。光催化活性的提高,与Ag表面等离子体共振效应、Ag优异的电荷传导性以及g-C₃N₄与TiO₂ NTs界面的异质结有关。

关键词 ：无机非金属材料, TiO₂, Ag, g-C₃N₄, 西维因, 光催化

Abstract：

Titanium oxide nano-tubes (TiO₂NTs) were firstly prepared by anodic oxidation method, and then Ag and carbonitride g-C₃N₄ were deposited onto TiO₂ NTs under the synergistic action of ultraviolet irradiation and microwave heating to prepare the ternary composite photocatalyst g-C₃N₄/Ag/TiO₂ NTs. Then the prepared composites were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), UV Vis diffuse reflectance spectroscopy (UV-Vis) and photoluminescence spectroscopy (PL).The results show that the composite of g-C₃N₄/Ag/TiO₂ NTs presents a higher degradation rate of 51.8% for the carbaryl under the simulated sunlight, in the contrast, that of the simple TiO₂ NTs is 29.1% only. The improvement of photocatalytic activity is related to the combined effect of the surface plasmon resonance effect of Ag, the excellent charge conductivity of Ag and the formation of heterojunction between g-C₃N₄ and TiO₂ NTs.

Key words： inorganic nonmetallic materials TiO₂ Ag g-C₃N₄ carbaryl photocatalysis

收稿日期: 2021-02-07

ZTFLH:

X703

基金资助:黑龙江省自然科学基金(QC2018021)

作者简介: 谭冲,男,1980年生,博士

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.139 或 https://www.cjmr.org/CN/Y2022/V36/I5/392

图1 g-C3N4 、TiO2 NTs、Ag/TiO2 NTs 和g-C3N4/Ag/TiO2 NTs样品的XRD谱

图2 g-C3N4、TiO2 NTs、Ag/TiO2 NTs和g-C3N4/Ag/TiO2 NTs的SEM照片

图3 g-C3N4/Ag/TiO2 NTs的TEM照片

图4 g-C3N4/Ag/TiO2 NTs EDS的能谱和元素分布

图5 TiO2 NTs和g-C3N4/Ag/TiO2 NTs的XPS全谱(a)和O 1s(b)、Ti 2p(c)、Ag 3d(d)、C 1s(e)和N 1s(f)的高分辨谱

图6 TiO2 NTs、Ag/TiO2 NTs和g-C3N4/Ag/TiO2 NTs的UV-Vis DRS光谱和光学带隙

图7 TiO2 NTs、Ag/TiO2 NTs和g-C3N4/Ag/TiO2 NTs对西维因的降解曲线和动力学分析

表1 TiO2 NTs、Ag/TiO2 NTs和g-C3N4/Ag/TiO2 NTs的光催化降解动力学参数

图8 催化剂的光催化性能与使用次数的关系

图9 TiO2 NTs、Ag/TiO2 NTs和g-C3N4/Ag/TiO2 NTs的光致发光谱

图10 自由基的清除率

图11 光催化机理

图12 西维因的标准品色谱、色谱和降解产物质谱

图13 西维因的降解路径和水解路径

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