Preparation of porous titania particles by partial dissolution and hot-water or hydrothermal treatment of hydrous titania
Preparation of porous titania particles by partial dissolution and hot-water or hydrothermal treatment of hydrous titania
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DOI：
10.1080/17436753.2023.2182993
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发表时间：
2023-01
影响因子：
2.2
通讯作者：
Takashi Kojima;Tsukasa Baba;Kohei Inamoto;Rena Isowaki;Chieko Yukita;Kazuya Ujiie;Akiko Takeda
中科院分区：
文献类型：
--
作者：
Takashi Kojima;Tsukasa Baba;Kohei Inamoto;Rena Isowaki;Chieko Yukita;Kazuya Ujiie;Akiko Takeda
制备了尺寸均匀、表面无孔或多孔的无定形水合二氧化钛颗粒(HTPs)，并通过热水或水热处理诱导二氧化钛相结晶，以制备具有微米级高比表面积和高外径的多孔二氧化钛颗粒。与结晶无孔球形HTPs所需的处理条件相比，多孔HTPs在较温和的处理条件下结晶。这种差异归因于水合二氧化钛缩聚状态的不同。经80℃热水处理24 h的多孔二氧化钛颗粒的比表面积为216m2g−1，尽管其颗粒尺寸为微米级。这种简单的方法可以在低温下合成高功能的二氧化钛颗粒，是一种通用的制备用作吸附剂、催化剂和催化剂载体的多孔颗粒的方法。
Uniform-sized amorphous hydrous titania particles (HTPs) with nonporous or porous surface were prepared and subjected to hot-water or hydrothermal treatment to induce crystallisation of the titania phase for preparing porous titania particles with high specific surface area (SSA) and outer diameter in a micron order. Porous HTPs were crystallised under milder treatment conditions than those required to crystallise nonporous spherical HTPs. This difference was attributed to the difference in the polycondensation states of hydrous titania. The SSA of the porous titania particles crystallised by hot-water treatment at 80°C for 24 h was 216 m2 g−1, despite their micron-order particle size. This simple method can synthesise highly functional titania particles at low temperatures and is a general-purpose method for preparing porous particles for use as adsorbents, catalysts and catalyst supports.