化工新型材料

化工新型材料 ›› 2022, Vol. 50 ›› Issue (1) : 196-200. DOI: 10.19817/j.cnki.issn1006-3536.2022.01.040

科学研究

煤矸石负载TiO₂复合高分子材料的制备及其去除水体中苯酚的研究

作者信息 +

Preparation of TiO₂/St/CGTiO₂/St/CG composite and its application in phenol removal from water

Zhang Yan, Wang Rui, Chen Jia, Gao Pingqiang

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文章历史 +

Received		Published
2021-07-11		2022-01-20
Issue Date	Revised Date
2022-02-08	2021-07-11

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摘要

以固废物煤矸石(CG)为载体,以Ti(SO₄)₂为钛源,采用水热法制备煤矸石负载型二氧化钛(TiO₂/CG),并通过淀粉(St)对TiO₂/CG进行表面改性,得到TiO₂/St/CGTiO₂/St/CG复合高分子材料,用于处理含酚废水。利用扫描电镜和红外光谱对产物的组成和微观形貌结构进行表征。以苯酚为目标污染物,考察TiO₂/St/CG投加量、苯酚初始pH、反应时间、苯酚溶液初始浓度和反应温度对苯酚去除率的影响,研究反应动力学规律。结果表明:TiO₂以锐钛矿的形式被负载于煤矸石表面,通过淀粉与TiO₂之间形成的C—O—Ti键,实现了淀粉对其表面改性。当TiO₂/St/CG用量为2g/L、反应时间为60min、反应温度为30^oC、苯酚初始浓度为20mg/L、苯酚初始pH为5,苯酚去除率达到64%。伪二级动力学模型拟合相关系数在0.99以上,能很好地描述苯酚在材料上的吸附行为。

Abstract

Using solid waste coal gangue (CG) as carrier and Ti(SO₄)₂ as titanium source,TiO₂/CG was prepared by hydrothermal method.and TiO₂/St/CG composite material used to treat phenol containing wastewater was obtained through the surface of TiO₂/CG modified by starch (St).Scanning electron microscopy and infrared spectroscopy were used to characterize the composition and microstructure of the products.The effects of the dosage of TiO₂/St/CG,initial pH value of phenol,reaction time,initial concentration of phenol solution and reaction temperature on the removal performance were investigated.The results showed that TiO₂ as anatase was successfully loaded on the surface of coal gangue,and the surface modification was achieved through the C—O—Ti bond formed between starch and TiO₂.When the dosage of TiO₂/St/CG was 2g/L,the reaction time 60min,the reaction temperature 30^oC,the initial concentration of phenol 20mg/L,and the initial pH of phenol 5,the removal rate of phenol reached 64%.The pseudo second-order kinetic model fitting correlation coefficients were above 0.99,which could well describe the adsorption behavior of phenol on the material.

关键词

煤矸石 / 二氧化钛 / 苯酚 / 淀粉 / 去除反应

Key words

coal gangue / TiO₂ / phenolic / starch / removal performance

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煤矸石负载TiO₂复合高分子材料的制备及其去除水体中苯酚的研究[J]. 化工新型材料, 2022, 50(1): 196-200 DOI:10.19817/j.cnki.issn1006-3536.2022.01.040

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基金资助

陕西省教育厅重点实验室科研计划项目(19JS072);榆林学院高层次人才科研启动金项目(18GK20);国家大学生创新创业训练计划项目(S202011395022);国家大学生创新创业训练计划项目(202111395024);国家大学生创新创业训练计划项目(S202111395070);国家市场监管局科技计划项目(2019MK069);中科院洁净能源创新研究院-榆林学院联合基金(2021003)

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