g-C3N4/Bi12O17Cl2复合物的制备及其光催化性能

doi:10.11901/1005.3093.2021.234

材料研究学报

2021, Vol. 35

Issue (12): 911-917 DOI: 10.11901/1005.3093.2021.234

研究论文

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g-C₃N₄/Bi₁₂O₁₇Cl₂复合物的制备及其光催化性能

宋月红¹, 代卫丽¹, 徐辉², 赵敬哲³(

)

^1.商洛学院化学工程与现代材料学院陕西省尾矿资源综合利用重点实验室陕西省矿产资源清洁高效转化与新材料工程研究中心商洛 726000
^2.湖南省益阳市南县检验检测中心益阳 413000
^3.湖南大学化学化工学院长沙 410082

Preparation and Photocatalytic Properties of g-C₃N₄/Bi₁₂O₁₇Cl₂ Composites

SONG Yuehong¹, DAI Weili¹, XU Hui², ZHAO Jingzhe³(

)

^1.Shangluo University, College of Chemical Engineering and Modern Materials, Shaanxi Key Laboratory of Comprehensive Utilization of Tailings Resources, Shaanxi Engineering Research Center for Mineral Resources Clean & Efficient Conversion and New Materials, Shangluo 726000, China
^2.Nanxian Inspection and Testing Center of Yiyang City in Hunan Province, Yiyang 413000, China
^3.Hunan University, College of Chemistry and Chemical Engineering, Changsha 410082, China

引用本文:

宋月红, 代卫丽, 徐辉, 赵敬哲. g-C₃N₄/Bi₁₂O₁₇Cl₂复合物的制备及其光催化性能[J]. 材料研究学报, 2021, 35(12): 911-917.
Yuehong SONG, Weili DAI, Hui XU, Jingzhe ZHAO. Preparation and Photocatalytic Properties of g-C₃N₄/Bi₁₂O₁₇Cl₂ Composites[J]. Chinese Journal of Materials Research, 2021, 35(12): 911-917.

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摘要:

以硝酸铋、氯化钠和氢氧化钠为原料用液相沉淀法制备g-C₃N₄/Bi₁₂O₁₇Cl₂复合光催化剂，并用X射线衍射(XRD)、傅里叶红外光谱(FT-IR)、扫描电子显微镜(SEM)、紫外-可见漫反射光谱(UV-Vis DRS)等手段表征其组成、微观形貌和性能，以罗丹明B为模拟污染物研究了在可见光照射下g-C₃N₄对g-C₃N₄/Bi₁₂O₁₇Cl₂复合光催化剂活性的影响及其光催化机理。结果表明，2% (质量分数) g-C₃N₄/Bi₁₂O₁₇Cl₂复合光催化剂的光催化性能最好，见光90 min后对罗丹明B的降解率达到98%。

关键词 ：无机非金属材料, g-C₃N₄/Bi₁₂O₁₇Cl₂复合物, 光催化, 罗丹明B, 光催化机理

Abstract：

Composites of g-C₃N₄/Bi₁₂O₁₇Cl₂were prepared by a simple liquid phase precipitation method with bismuth nitrate, sodium chloride, sodium hydroxide and graphitic carbon nitride as raw material. The composition and morphology of the prepared composites were characterized by means of X-ray diffraction (XRD), Fourier transform infrared spectroscopy (FT-IR), scanning electron microscopy (SEM) and UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS). The effect of g-C₃N₄ on the photocatalytic activity of g-C₃N₄/Bi₁₂O₁₇Cl₂ composites were evaluated with Rhodamine B as the simulated pollutant under visible light. The results show that the photocatalytic performance of 2 % g-C₃N₄/Bi₁₂O₁₇Cl₂composite is the best, after 90 min of light exposure the photocatalytic degradation rate of RhB reached 98.64%.

Key words： inorganic nonmetallic materials g-C₃N₄/Bi₁₂O₁₇Cl₂composites photocatalysis RhB photocatalytic mechanism

收稿日期: 2021-04-15

ZTFLH:

O614

基金资助:国家自然科学基金(21571057);商洛学院科研(17SKY018);陕西省教育厅(19JS026);陕西省自然科学基础研究计划(2019JQ-156)

作者简介: 宋月红，女，1986年生，讲师

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https://www.cjmr.org/CN/10.11901/1005.3093.2021.234 或 https://www.cjmr.org/CN/Y2021/V35/I12/911

图1 g-C3N4、Bi12O17Cl2和一系列g-C3N4/Bi12O17Cl2复合物的XRD谱

图2 g-C3N4、Bi12O17Cl2和g-C3N4/Bi12O17Cl2复合物的FT-IR谱

图3 样品的SEM照片

图4 g-C3N4、Bi12O17Cl2、g-C3N4/Bi12O17Cl2复合物的紫外-可见漫反射光谱和(ahv)1/2-hv曲线

表1 g-C3N4和Bi12O17Cl2的EVB、ECB和Eg

图5 g-C3N4、Bi12O17Cl2和g-C3N4/Bi12O17Cl2复合物光催化降解RhB其浓度随时间的变化曲线、降解RhB的ln(C0/C)-t曲线以及相应的反应动力学常数(k)

图6 捕获剂对g-C3N4/Bi12O17Cl2复合物光催化性能的影响和光催化机理

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