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

Abstract

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

CLC Number:

O652.6

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.

Figures/Tables 7

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References 19

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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

National Inorganic Salts Information Center

Inorganic Acid-Base-Salt Committee of CIESC

Facile synthesis of bismuth oxychloride and its photocatalytic degradation performance of p-nitrophenol

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