氯氧化铋简便合成及其光催化降解对硝基苯酚性能

doi:10.19964/j.issn.1006-4990.2021-0776

摘要/Abstract

摘要：

光催化降解是一种有效的处理环境污染物的方法。氯氧化铋（BiOCl）已成为传统光催化剂的潜在替代品，并显示出优异的性能。采用简单的机械搅拌法合成了BiOCl光催化剂，并通过扫描电镜（SEM）、透射电镜（TEM）、红外光谱（FT-IR）、X射线衍射（XRD）、X射线光电子能谱（XPS）、氮气吸附-脱附和紫外-可见漫反射光谱（UV-Vis DRS）等对其形貌、组成、结构、比表面积以及光学性能进行了表征。结果显示，制备的BiOCl显示出二维纳米薄片状形貌，带隙宽度为3.3 eV。利用光催化降解对硝基苯酚（PNP）为模拟反应评估了BiOCl的光催化活性。受益于BiOCl表面高暴露的（110）晶面，在80 min、BiOCl投加量为0.4 g/L条件下，BiOCl对PNP的去除率高达99.7%。动力学研究表明，该降解过程符合一级动力学方程，动力学常数为0.043 min^-1。自由基捕获实验证实，该降解过程中主要的自由基为?O₂^-和?OH。此外，还分析了BiOCl降解PNP的机理。研究结果为光催化法治理废水提供了有价值的信息和参考。

关键词: 光催化, 降解, 氯氧化铋, 自由基

Abstract:

Photocatalytic degradation is an effective method for treating environmental pollutants.Bismuth oxychloride（BiOCl） has emerged as a potential alternative to traditional photocatalysts and has shown excellent performance.BiOCl catalyst was synthesized by a simple mechanical agitation method，and its morphology，composition，structure，specific surface area and optical properties were characterized by scanning electron microscopy（SEM），transmission electron microscopy（TEM），infrared spectroscopy（FT-IR），X-ray diffraction（XRD），X-ray photoelectron spectroscopy（XPS），N₂adsorption?desorption and UV-Vis-diffuse reflectance（UV-VIS-DRS）.The results showed that the as?obtained BiOCl exhibited a two?dimensional nanosheet morphology with a band gap of 3.3 eV.The photocatalytic degradation of p-nitrophenol（PNP） was employed as a model reaction to evaluate the photocatalytic activity of BiOCl.Bene?ting from the high exposed（110） facet，degradation of PNP could be 99.7% by BiOCl with catalyst concentration of 0.4 g/L in 80 min. Kinetic studies showed that the degradation process was following the first order kinetic model with the kinetic constant of 0.043 min^-1. Radical capture experiment demonstrated that ·O₂^- and ·OH played the main roles in the degradation process.Besides，the photocatalytic degradation mechanism of p-nitrophenol by BiOCl was also proposed. The results offered valuable information and reference for the treatment of wastewater through photocatalytic processes.

Key words: photocatalysis, degradation, BiOCl, radicals

中图分类号:

O652.6

仝海娟,李思琦,范方方,左卫元,史兵方. 氯氧化铋简便合成及其光催化降解对硝基苯酚性能[J]. 无机盐工业, 2022, 54(9): 157-162.

TONG Haijuan,LI Siqi,FAN Fangfang,ZUO Weiyuan,SHI Bingfang. Facile synthesis of bismuth oxychloride and its photocatalytic degradation performance of p-nitrophenol[J]. Inorganic Chemicals Industry, 2022, 54(9): 157-162.

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参考文献 19

[1]	WANG Ying， YANG Chuanxi， LIU Yonglin， et al.Solvothermal synthesis of ZnO nanoparticles for photocatalytic degradation of methyl orange and p-nitrophenol[J].Water，2021，13（22）.Doi:10.3390/w13223224.
[2]	孙鹏，柳佳鹏，王维大，等.活性炭强化热活化过硫酸盐降解对硝基苯酚[J].中国环境科学，2020，40（11）:4779-4785.
	SUN Peng， LIU Jiapeng， WANG Weida， et al.Active carbon enhanced thermal activation of persulfate for degradation of p-nitrophenol[J].China Environmental Science，2020，40（11）:4779-4785.
[3]	何亚萍.纳米金对对硝基苯酚的降解行为研究[J].环境保护科学，2018，44（1）:61-65.
	HE Yaping.Degradation behavior of nanogold towards nitro phen⁃ol[J].Environmental Protection Science，2018，44（1）:61-65.
[4]	夏丞垚，陈琼珍，沈文静，等.对硝基苯酚的生物降解研究进展[J].生物加工过程，2021，19（4）:387-395.
	XIA Chengyao， CHEN Qiongzhen， SHEN Wenjing， et al.Advancement inmicrobial degradation of Para⁃nitrophenol[J].Chinese Jo⁃urnal of Bioprocess Engineering，2021，19（4）:387-395.
[5]	DENG Fang， ZHANG Qian， YANG Lixia， et al.Visible⁃light⁃responsive graphene⁃functionalized Bi-bridge Z-scheme black BiOCl/Bi₂O₃ heterojunction with oxygen vacancy and multiple charge transfer channels for efficient photocatalytic degradation of 2-nitrophenol and industrial wastewater treatment[J].Applied Catalysis B:Environmental，2018，238:61-69.
[6]	KADAM V V， SHANMUGAM S D， ETTIYAPPAN J P， et al.Photocatalytic degradation of p-nitrophenol using biologically synthesized ZnO nanoparticles[J].Environmental Science and Pollution Research，2021，28（10）:12119-12130.
[7]	王丽，刘进，师兆忠，等.溶剂热法制备CdS@g-C₃N₄复合材料及其催化性能研究[J].工业水处理，2021，41（1）:38-42.
	WANG Li， LIU Jin， SHI Zhaozhong， et al.Preparation of CdS@g-C₃N₄ by solvothermal method and its catalytic performance[J].Industrial Water Treatment，2021，41（1）:38-42.
[8]	王晨鑫，陈美丽，田蒙奎，等.镂空α-氧化铁纳米带制备及其光催化性能研究[J].无机盐工业，2021，53（6）:185-189.
	WANG Chenxin， CHEN Meili， TIAN Mengkui， et al.Study on preparation of hollow α-Fe₂O₃ nanobelts and their photocatalytic properties[J].Inorganic Chemicals Industry，2021，53（6）:185-189.
[9]	黄夏梦.光催化材料Bi₄O₇/BiOBr的制备及其光催化性能研究[J].无机盐工业，2021，53（4）:112-116.
	HUANG Xiameng.Preparation of photocatalytic materials of Bi₄O₇/BiOBr and study on their photocatalytic performance[J].Inorganic Chemicals Industry，2021，53（4）:112-116.
[10]	LIU Haijin， DU Cuiwei， LI Meng， et al.One-pot hydrothermal synthesis of SnO₂/BiOBr heterojunction photocatalysts for the efficient degradation of organic pollutants under visible light[J].ACS Applied Materials & Interfaces，2018，10（34）:28686-28694.
[11]	ARTHUR R B， BONIN J L， ARDILL L P， et al.Photocatalytic degradation of ibuprofen over BiOCl nanosheets with identification of intermediates[J].Journal of Hazardous Materials，2018，358:1-9.
[12]	LI Shijie， CHEN Jialin， LIU Yanping， et al.Insitu anion exchange strategy to construct flower⁃like BiOCl/BiOCOOH p-n heterojunctions for efficiently photocatalytic removal of aqueous toxic pollutants under solar irradiation[J].Journal of Alloys and Compounds，2019，781:582-588.
[13]	LIU Juanjuan， CHEN Lingze， ZHANG Suling， et al.Visible⁃light photoactive BiOCl nanosheets prepared by a solution chemistry method[J].Materials Letters，2018，233:174-176.
[14]	GAO Xiaoya， PENG Wen， TANG Guangbei， et al.Highly efficient and visible⁃light⁃driven BiOCl for photocatalytic degradation of carbamazepine[J].Journal of Alloys and Compounds，2018，757:455-465.
[15]	ALI M E M， ASSIREY E A， ABDEL-MONIEM S M， et al.Low temperature⁃calcined TiO₂ for visible light assisted decontamination of 4-nitrophenol and hexavalent chromium from wastewat⁃er[J].Scientific Reports，2019，9.Doi:10.1038/s41598-019-55912-2.
[16]	HASAN I， SHEKHAR C， SHARFAN I I BIN， et al.Ecofriendly green synthesis of the ZnO-doped CuO@Alg bionanocomposite for efficient oxidative degradation of p-nitrophenol[J].ACS Omega，2020，5（49）:32011-32022.
[17]	HUANG Jingwen， JIN Bo， LIU Huiqiang， et al.Controllable synthesis of flower⁃like MoSe₂ 3D microspheres for highly efficient visible⁃light photocatalytic degradation of nitro⁃aromatic explosives[J].Journal of Materials Chemistry A，2018，6（24）:11424-11434.
[18]	ZHANG Guangshan， HU Limin， ZHAO Renbo， et al.Microwave⁃assisted synthesis of ZnNiAl⁃layered double hydroxides with calcination treatment for enhanced PNP photo-degradation under visible⁃light irradiation[J].Journal of Photochemistry and Photobiology A:Chemistry，2018，356:633-641.
[19]	LU Xiaoying， CHE Wenjie， HU Xiufeng， et al.The facile fabrication of novel visible⁃light⁃driven Z-scheme CuInS₂/Bi₂WO₆ heterojunction with intimate interface contact by in situ hydrothermal growth strategy for extraordinary photocatalytic performan⁃ce[J].Chemical Engineering Journal，2019，356:819-829.

污染物	BiOCl加入量/ （g·L^-1）	一级动力学参数
污染物	BiOCl加入量/ （g·L^-1）	k₁/min^-1	b	R²
PNP	0.0	0.001	0.001	0.994 5
	0.1	0.011	0.061	0.984 3
	0.2	0.015	0.092	0.992 2
	0.3	0.027	-0.002	0.988 2
	0.4	0.043	-0.024	0.992 1
	0.5	0.026	-0.011	0.989 6

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