Preparation of porous titania particles by partial dissolution and heat treatment of hydrous titania
Preparation of porous titania particles by partial dissolution and heat treatment of hydrous titania
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DOI：
10.2109/jcersj2.16208
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发表时间：
2016-12
影响因子：
1.1
通讯作者：
T. Kojima;Tsukasa Baba;Kosuke Ota;Chieko Yukita;Kohei Inamoto;N. Uekawa
中科院分区：
文献类型：
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作者：
T. Kojima;Tsukasa Baba;Kosuke Ota;Chieko Yukita;Kohei Inamoto;N. Uekawa
通过水合二氧化钛的部分溶解和随后的热处理，制备了多孔二氧化钛颗粒。以醇钛为原料，在不同的水解条件下，制得了均匀、球形的水合二氧化钛。将制备的水合二氧化钛颗粒浸泡在乙醇中以溶解颗粒中的弱凝聚部分。结果表明，温和水解法制备的水合二氧化钛颗粒表面形成了中孔和大孔结构。在400℃热处理后，颗粒仍为锐钛矿相，但仍保持了多孔结构。水合二氧化钛在400℃下热处理15min制得的多孔二氧化钛颗粒的比表面积为121m2/g。
Porous titania particles were prepared by partial dissolution of hydrous titania and subsequent heat treatment. Uniform and spherical particles of hydrous titania were prepared by hydrolysis of titanium alkoxide at different hydrolysis conditions. The asprepared hydrous titania particles were soaked in ethanol to dissolve the weakly polycondensed part of the particles. As a result, mesoand macroporous structures were formed on the surface of the hydrous titania particles that were prepared by mild hydrolysis. The porous structure was retained even after heat treatment at 400°C while the particles crystallized into the anatase phase. The specific surface area of the porous titania particles prepared by heat treatment of hydrous titania at 400°C for 15min was 121m2/g.