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Application of Membrane Separation in Purification of Hydrated Titanium Dioxide Nanoparticles

Abstract

TiO2因其优异的化学稳定性、高折射率、强紫外吸收能力和光化学活性,使它在颜料、催化剂及载体、陶瓷、无机膜、废水处理等众多方面具有广阔的应用前景。纳米TiO2具有大的比表面而呈现奇特的性能,引起广泛的关注。但是在无机盐存在的情况下,纳米微粒容易团聚(特别是在烧结过程中),导致其热稳定性下降,从而影响其应用。 在本论文第一部分,我们研究了氯离子对纳米TiO2结构、性能的影响。据我们所知,氯离子对纳米TiO2的影响还未见报道。我们以TiCl4水解来制备纳米TiO2水合物,沉淀剂分别为尿素和氨水。沉淀物加水洗涤并用超滤膜过滤洗涤进行纯化处理,以除去夹杂在纳米TiO2中的NH4Cl。通过洗涤过程的控...Titanium dioxide shows outstanding chemical stability, high refraction index, great ultraviolet absorptive and photochemical activity, which are expected to play important roles in pigments, catalysts and supports, ceramics, inorganic membrane, waster water purification and so forth. The titanium dioxide nanoparticles have large specific surface area and exhibit some special characteristics. Howev...学位:理学硕士院系专业:化学化工学院材料科学系_高分子化学与物理学号:20003600

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