化工新型材料

化工新型材料 ›› 2019, Vol. 47 ›› Issue (2) : 116-121.

新材料与新技术

PPy/TiO₂复合微球的制备及其吸附-紫外光催化性能研究

李大军, 罗馨, 邓雨佳, 吴俏利

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Study on preparation of PPy/TiO₂ microsphere and adsorption UV photocatalysis

Li Dajun, Luo Xin, Deng Yujia, Wu Qiaoli

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文章历史 +

Received		Published
2017-09-20		2019-02-20
Issue Date	Revised Date
2019-03-18	2017-09-20

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摘要

以盐酸为无机酸,采用原位聚合法制备出不同摩尔比的聚吡咯/二氧化钛(PPy/TiO₂)复合微球,以亚甲基蓝(MB)染料为目标污染物,考察了PPy/TiO₂复合微球的吸附-紫外光催化性能以及影响因素。结果表明:制备PPy/TiO₂复合微球的最佳条件为摩尔比10:1,投加量为1.5g/L;提高反应温度有利于光催化效率的提升,但对吸附量影响小;在酸性条件下废水中MB的去除效果优于中性和碱性条件下的去除效果;影响因素优化后,经30min吸附和3h紫外光催化处理,MB的去除率可达99.1%;PPy/TiO₂复合微球对MB和孔雀石绿这2种离子染料均有较高的去除率;紫外光催化降解MB的反应符合Langmuir-Hinshelwood动力学模型;复合微球循环使用20次对MB的去除率依然可达到92.7%以上,说明PPy/TiO₂复合微球有极强的循环稳定性和应用潜力。

Abstract

Hydrochloric acid used as an inorganic acid,PPy/TiO₂ composite microspheres with different molar ratio were prepared by in situ polymerization.The adsorption of PPy/TiO₂ and the influencing factors were studied by using methylene blue (MB) dyes as the target pollutants.The results showed that the optimum molar ratio of PPy/TiO₂ was 10:1,and the optimum dosage was 1.5g/L.The improvement of reaction temperature was beneficial to the improvement of photocatalytic efficiency,but the effect on adsorption was small.MB removal efficiency was 99.1% after 30 minutes adsorption and 3h UV photocatalytic treatment.PPy/TiO₂ had high removal rates for both MB and MG.UV photocatalytic degradation of MB was consistent with the Langmuir-Hinshelwood kinetic model.MB removal rate was still up to 92.7% when cycling 20 times,indicating that PPy/TiO₂ microspheres had strong cycle stability and application potential.

关键词

二氧化钛 / 聚吡咯 / 复合微球 / 吸附 / 紫外光催化

Key words

titanium dioxide / polypyrrole / composite microsphere / adsorption / UV photocatalysis

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PPy/TiO₂复合微球的制备及其吸附-紫外光催化性能研究[J]. 化工新型材料, 2019, 47(2): 116-121 DOI:

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