| 氟化铵对纳米金红石型钛硅复合氧化物表面改性研究 |
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| 引用本文： | 赵淑芳,侯磊鑫,柳丹丹,方 莉,程芳琴.氟化铵对纳米金红石型钛硅复合氧化物表面改性研究[J].日用化学工业,2018,48(5):283-287. |
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| 作者姓名： | 赵淑芳 侯磊鑫 柳丹丹 方 莉 程芳琴 |
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| 作者单位： | 山西大学化学化工学院;山西大学资源与环境工程研究所山西低附加值煤基资源高值利用协同创新中心 |
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| 基金项目： | 国家重点研发计划(2017YFB0603101，2017YFB0603102)；山西省煤基低碳科技重大专项(MC2016-05)；“三晋学者”支持计划 |
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| 摘 要： | 以硫酸氧钛为钛源、硅酸钠为硅源,采用改进的水解沉淀法制备了纳米金红石型钛硅复合氧化物(TiO_2-SiO_2),以氟化铵(NH_4F)为表面改性剂,采用水热法在不同溶剂中对TiO_2-SiO_2进行改性,并通过X-射线衍射仪、傅里叶红外光谱仪、扫描电镜、原子力显微镜和接触角测量仪等,研究了不同溶剂对改性效果的影响。结果表明,以异丙醇为溶剂进行NH_4F改性时,由于表面Si-F键的形成、异丙醇表面自组装和表面微纳分层粗糙结构的形成等因素的协同作用,改性后的纳米金红石型TiO_2-SiO_2比表面积大,具有良好的表面性能,其比表面积达332 m2/g,水和二碘甲烷接触角分别达到147.1°和147.2°。
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| 关 键 词： | 氟化铵 表面改性 钛硅复合氧化物 异丙醇 |
| 收稿时间： | 2018/2/2 0:00:00 |
Surface modification of rutile titania-silica nanocomposites by ammonium fluoride |
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| ZHAO Shu-fang,HOU Lei-xing,LIU Dan-dan,FANG Li and CHENG Fang-qin.Surface modification of rutile titania-silica nanocomposites by ammonium fluoride[J].China Surfactant Detergent & Cosmetics,2018,48(5):283-287. |
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| Authors: | ZHAO Shu-fang HOU Lei-xing LIU Dan-dan FANG Li and CHENG Fang-qin |
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| Abstract: | Rutile-TiO2-SiO2 nanocomposites were synthesized by an improved hydrolysis-coprecipitation method using sodium metasilicate and titanium oxysulfate as precursors. Using hydrothermal method, the obtained nanocomposites were further modified by ammonium fluoride (NH4F) in different solvents. The effects of solvents on modification were studied by characterization of the modified nanocomposites by X-ray diffraction, fourier transform infrared spectra, scanning electron microscopy, atomic force microscope and contact angle (CA) measurements. The results show that, the rutile-TiO2-SiO2 modified by NH4F in isopropanol exhibits large specific surface area and has good surface properties, due to the cooperative factors happening at the surface, such as the formation of Si-F bonds, the micro/nano hierarchical rough structure and the self-assembly of isopropanol. Its specific surface area is 332 m2/g, and the contact angles of water and diiodomethane are 147.1° and 147.2°, respectively. |
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| Keywords: | ammonium fluoride surface modification titania-silica composites isopropanol |
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