化工新型材料

化工新型材料 ›› 2020, Vol. 48 ›› Issue (4) : 269-273.

开发与应用

响应面法优化C改性TiO₂磁性光催化剂的制备及其光降解甲基橙

^1,2

^1,2*

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Preparation of C-TiO₂@Fe₃O₄/AC magnetic photocatalyst optimized by response surface method and MO photodegradation

Zhu Lin^1,2, Kong Xiangquan^1,2, Ren Baixiang^1,2

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文章历史 +

Received
2018-12-11
Issue Date	Revised Date
2020-05-14	2018-12-11

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摘要

采用水解-共沉淀法将C改性TiO₂负载于Fe₃O₄磁性活性炭上,制备出具有磁性特性的C改性TiO₂光催化剂,并通过响应面分析法,确定了其制备最佳条件。模拟太阳光采用该催化剂光降解模拟污染物甲基橙溶液,最佳条件下反应30min,50mg/L甲基橙降解率可达97.1%,高出商用TiO₂光催化剂去除率25.1%。同时,该催化剂也具有较为优异的可见光激发降解效果,在400～800nm可见光辐照条件下,光催化降解甲基橙降解率可达64.7%,效果高出商用TiO₂光催化剂2.09倍。本研究为光催化降解有机污染物提供了新的催化剂合成思路和途径。

Abstract

A novel magnetic photocatalyst (C modified TiO₂ loading on magnetic Fe₃O₄ actived carbon,C-TiO₂@Fe₃O₄/AC) was prepared by hydrolysis-coprecipitation method.The response surface method was used to obtain the optimal conditions of catalyst synthesis.The methyl orange (MO) was selected as the model pollutant and C-TiO₂@Fe₃O₄/AC was utilized in photo degradation with simulated sunlight light.At the optimal conditions,50mg·L^-1 MO was degraded up to 97.1% for 30min reaction.The MO degradation rate was 25.1% higher than the commercial TiO₂ catalyst.Furthermore,C-TiO₂@Fe₃O₄/AC had excellent visible light catalytic effect.In the condition of 400～800nm visible light irradiation,MO degradation rate also can reach 64.7% which was 2.09 times higher than that of the commercial TiO₂ light catalyst.This study provided a new approach for photocatalytic degradation of organic pollutants.

关键词

改性二氧化钛 / 光催化剂 / 响应面法 / 磁性催化剂 / 可见光

Key words

modified TiO₂ / photocatalyst / response surface method / magnetic catalyst / visible light

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响应面法优化C改性TiO₂磁性光催化剂的制备及其光降解甲基橙[J]. 化工新型材料, 2020, 48(4): 269-273 DOI:

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