钒酸铋晶面调控制备及其降解四环素类抗生素性能研究

doi:10.19964/j.issn.1006-4990.2021-0091

摘要/Abstract

摘要：

采用溶剂热法合成了单斜白钨矿型钒酸铋（m-BiVO₄）催化材料,采用XRD、BET、SEM、TEM等对其进行了表征。研究发现m-BiVO₄的形貌和晶面可以通过反应溶液的pH进行调控,在pH=7条件下制备出了具有（010）晶面择优暴露的m-BiVO₄（BVO-010）。以盐酸金霉素（CTC-HCl）、土霉素（OTC）、四环素（TC）和盐酸四环素（TCN）溶液为目标污染物,评价了制备材料的光催化降解性能。结果发现,与主要暴露热力学稳定的（-121）面的m-BiVO₄（BVO-121）相比,BVO-010的降解性能明显提高,光照150 min后对CTC-HCl、OTC、TC和TCN的降解率分别为77.9%、79.2%、63.6%和73.9%,可用于处理含抗生素类药物的污水。

关键词: BiVO₄, 晶面调控, 光催化, 四环素类抗生素

Abstract:

The monoclinic scheelite bismuth vanadate（m-BiVO₄） catalytic material was synthesized by a solvothermal method and characterized by XRD,BET,SEM,TEM,etc.It was found that the morphology and crystal facet of BiVO₄ could be con-trolled by the pH value of the reaction solution,and m-BiVO₄ with preferentially exposed（010） facet（BVO-010） was pre-pared at pH=7.With chlortetracycline hydrochloride（CTC-HCl）,oxytetracycline（OTC）,tetracycline（TC） and tetracycline hydrochloride（TCN） solutions as target pollutants,the degradation performance of the samples was evaluated.It was disclosed that compared to m-BiVO₄ that mainly exposed the thermodynamically more stable（-121） facets（BVO-121）,BVO-010 ex-hibited more outstanding photocatalytic performance,and the degradation rates of CTC-HCl,OTC,TC,and TCN were 77.9%,79.2%,63.6%,and 73.9%,respectively after 150 min illumination,which was expected to treat wastewater containing antibiotic drugs.

Key words: BiVO₄, crystal facet regulation, photocatalysis, tetracycline antibiotics

中图分类号:

TQ135.11

史苏琦,张守臣,张迪嘉,宁桂玲,叶俊伟. 钒酸铋晶面调控制备及其降解四环素类抗生素性能研究[J]. 无机盐工业, 2021, 53(11): 114-121.

SHI Suqi,ZHANG Shouchen,ZHANG Dijia,NING Guiling,YE Junwei. Study on crystal facet regulation of bismuth vanadate and its degradation properties of tetracycline antibiotics[J]. Inorganic Chemicals Industry, 2021, 53(11): 114-121.

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样品	I_（040）/ I_（-121）	晶胞参数						晶胞体积/（nm³）	晶粒尺寸/ nm
样品	I_（040）/ I_（-121）	a	b	c	α	β	γ	晶胞体积/（nm³）	晶粒尺寸/ nm
BVO-2	0.17	5.149	11.705	5.136	90	89.97	90	0.310	32.5
BVO-4	0.18	5.173	11.700	5.111	90	90.11	90	0.309	25.0
BVO-6	1.31	5.195	11.712	5.106	90	90.33	90	0.311	70.8
BVO-7	1.40	5.195	11.701	5.097	90	90.39	90	0.310	98.1

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