波浪纹黑色二氧化钛微米管的制备及其光催化性能研究

黄竞1,2, 陈志谦1, 张艳华2*

化工新型材料 ›› 2023, Vol. 51 ›› Issue (1) : 203 -208.

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化工新型材料 ›› 2023, Vol. 51 ›› Issue (1) : 203-208. DOI: 10.19817/j.cnki.issn1006-3536.2023.01.039
科学研究

波浪纹黑色二氧化钛微米管的制备及其光催化性能研究

    黄竞1,2, 陈志谦1, 张艳华2*
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Preparation of wavy black titanium dioxide microtubes and its photocatalytic performance study

  • Huang Jing1,2, Chen Zhiqian1, Zhang Yanhua2
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摘要

为了提高TiO2的光催化性能,以钛酸丁酯(TBT)为钛源通过溶胶-凝胶法制备出TiO2前驱体,再以棉纤维为模板,将吸附有TiO2前驱体的棉纤维煅烧后得到了一种表面呈波浪纹的TiO2微米管,随后通过原位固态还原法,以硼氢化钠(NaBH4)为还原剂制备出黑色二氧化钛(TiO2-x)光催化剂。采用X射线衍射、拉曼光谱、X射线光电子能谱等手段对样品晶体结构与表面化学状态进行表征。以可见光下亚甲基蓝(MB)的光降解反应为模型,对所制备的TiO2-x的光催化性能进行评估。结果表明:相比于TiO2,TiO2-x在可见光下具有更高的催化活性,3h内对MB的降解率达到65.1%,是一种性能优异的光催化剂。

Abstract

To improve the activity of TiO2,TiO2 precursor was prepared by a sol-gel method using titanium(Ⅳ) n-butoxide (TBT) as Ti source,and then the cotton fiber was used as template to adsorb TiO2 precursor and calcined in air to synthesize a TiO2 microtube with wavy surface.Subsequently,using sodium borohydride (NaBH4) as a reducing agent,a black titanium dioxide (TiO2-x) photocatalyst was obtained by an in-situ solid-state reduction method.The crystal structure and surface chemical state of TiO2-x were characterized by X-ray diffraction (XRD),Raman spectroscopy (Raman),and X-ray photoelectron spectroscopy (XPS).The photodegradation reaction of methylene blue (MB) under visible light was used as a model to evaluate the photocatalytic performance of the prepared TiO2-x.The result demonstrated the catalytic activity of TiO2-x under visible light was higher than that of TiO2,and the degradation rate of TiO2-x to MB within 3h reached 75.1%,which indicated TiO2-x was a high-performance photocatalyst.

关键词

模板法 / TiO2-x / NaBH4 / 光催化剂

Key words

template / TiO2-x / NaBH4 / photocatalysis

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波浪纹黑色二氧化钛微米管的制备及其光催化性能研究[J]. 化工新型材料, 2023, 51(1): 203-208 DOI:10.19817/j.cnki.issn1006-3536.2023.01.039

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