纤蛇纹石/酸浸二氧化硅负载TiO2复合材料的结构性能及其降解罗丹明B的实验研究
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国家自然科学基金资助项目(51774016);中国博士后科学基金(2017M610017)


Structures of TiO2-loaded chrysotile/leached silica composites and the experimental study of their photocatalytic decomposition properties of Rhodamine B
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    摘要:

    以天然纳米矿物纤蛇纹石和酸浸二氧化硅为载体,钛酸四丁酯为钛源,在室温条件下采用溶胶-凝胶法,制备了负载TiO2的复合光催化材料。采用气体吸附、扫描电子显微镜(SEM)、X射线衍射(XRD)等方法对载体和不同温度煅烧得到的样品进行微观形貌和结构分析,并在紫外光照射下,以10 mg/L罗丹明B为目标污染物评价不同样品的光催化活性。结果表明,750℃煅烧的酸浸二氧化硅负载TiO2复合材料的光催化性能最好,光照40 min对罗丹明B的去除率达到91.57%,载体良好的吸附能力能够促进污染物的降解。

    Abstract:

    In this study, TiO2 was loaded onto natural nano mineral chrysotile/leached silica by using hydrolysis of tetrabutyl titanate at room temperature using sol-gel method. The morphological properties and microstructure of the supporters and catalysts at different calcination temperatures were characterized by N2 adsorption/desorption, scanning electron microscopy (SEM) and X-ray diffraction (XRD). The photocatalytic reactivities of these different catalysts were investigated by UV-assisted degradation of 10 mg/L Rhodamine B. The results show that the TiO2-loaded silica calcined at 750℃ exhibits significantly excellent reactivity with the removal rate of Rhodamine B up to about 91.57% after irradiation for 40 min, the good adsorption capabilities of the supporters can also contribute to the removal rate of Rhodamine B.

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曹曦,传秀云,李爱军,黄杜斌,2017,纤蛇纹石/酸浸二氧化硅负载TiO2复合材料的结构性能及其降解罗丹明B的实验研究[J].岩石矿物学杂志,36(6):800~806. CAO Xi, CHUAN Xiu-yun, LI Ai-jun, HUANG Du-bin,2017,Structures of TiO2-loaded chrysotile/leached silica composites and the experimental study of their photocatalytic decomposition properties of Rhodamine B[J]. Acta Petrologica et Mineralogica,36(6):800~806.

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  • 收稿日期:2017-08-10
  • 最后修改日期:2017-10-06
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  • 在线发布日期: 2017-11-21
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