化工新型材料

化工新型材料 ›› 2017, Vol. 45 ›› Issue (9) : 92-94.

新材料与新技术

Sr₆Bi₂O₉的制备及其可见光催化性能研究

^1,2*

作者信息 +

Study on the preparation and visible light photocatalytic performance of Sr₆Bi₂O₉

Liu Ruixiang¹, Yang Yanqing^1,2

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文章历史 +

Received		Published
2016-06-21		2017-10-19
Issue Date	Revised Date
2017-10-19	2016-06-21

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摘要

以Bi(NO₃)₃·5H₂O和Sr(NO₃)₂为原料,采用溶胶-凝胶法合成了Sr₆Bi₂O₉光催化剂。使用X射线衍射(XRD)、紫外-可见光漫反射(UV-Vis DRS)和傅里叶红外光谱(FT-IR)等对Sr₆Bi₂O₉催化剂的结构进行了表征。Sr₆Bi₂O₉样品的光催化性能是通过在可见光下(λ≥400nm)光催化降解直接耐酸大红(4BS)溶液来评估。实验结果表明,经过800℃焙烧处理的Sr₆Bi₂O₉光催化剂对模拟印染废水4BS显示出优异的降解性能,60min内对4BS的去除率高达98%。此外,研究了反应条件如有机物初始浓度、Sr₆Bi₂O₉投加量、溶液pH值对催化剂的光催化活性的影响。并进一步通过紫外-可见光谱分析结果验证了光催化剂对4BS的降解机理。

Abstract

Sr₆Bi₂O₉ powders were successfully synthesized by a sol-gel method using Bi(NO₃)₃·5H₂O and Sr(NO₃)₂ as the starting materials.The as-prepared materials were characterized by X-ray diffraction (XRD),UV-Vis diffuse reflectance spectrum (UV-Vis DRS) and fourier transform infrared spectrum (FT-IR),respectively.The photocatalytic activity of Sr₆Bi₂O₉ powders were evaluated by the degradation of 4BS under visible light irradiation (λ≥400nm).The results showed that the sample calcined at 800℃ exhibited a high photocatalytic activity,which reached to the complete removal of 4BS (98%) in 60min.In addition,some experimental factors such as initial concentration of organic solution,Sr₆Bi₂O₉ dosage,light source and solution pH were studied.Based on this result,the photocatalytic mechanism was further demonstrated through UV-Vis spectrum analysis.

关键词

铋酸锶 / 光催化 / 溶胶-凝胶法 / 直接耐酸大红 / 降解机理

Key words

Sr₆Bi₂O₉ / photocatalysis / sol-gel method / 4BS / degradation mechanism

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Sr₆Bi₂O₉的制备及其可见光催化性能研究[J]. 化工新型材料, 2017, 45(9): 92-94 DOI:

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