Synthesis of mesoporous TiO2 nanorods via a mild template-free sonochemical route and their photocatalytic performances

Synthesis of mesoporous TiO2 nanorods via a mild template-free sonochemical route and their photocatalytic performances
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温和无模板声化学路线合成介孔TiO2纳米棒及其光催化性能

DOI:
10.1016/j.catcom.2009.05.027
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发表时间:
2009-07
影响因子:
3.7
通讯作者:
Dong F.
Dong F.
中科院分区:
化学3区
文献类型:
--
作者:
Wu Z.;Wang H.;Guo S.;Dong F.

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以工业块状钛粉为原料,发展了一种温和的无模板声化学法合成介孔二氧化钛纳米棒。声化学合成过程是在常压和较低温度下进行的。所制备的材料含有大量不规则的橄榄状纳米棒聚集体。纳米棒宽8~12 nm,长15~100 nm,晶粒度为10.3 nm。提出了氧化-抖动-上卷收缩(OSRS)机制来解释晶体生长。样品的光催化活性是P25的2.8倍。
A mild template-free sonochemical method has been developed to synthesize mesoporous TiO2nanorods using industrial bulk Ti powder. The sonochemical synthesis process was carried out under normal atmospheric pressure and relative low temperature. The as prepared materials contained numerous irregular olive-like nanorods aggregates. The nanorods were 8–12nm in width and 15–100nm in length, with the crystalline size of 10.3nm. A mechanism of Oxidation–Shaking off–Rolling up–Shrinkage (OSRS) has been proposed to explain the crystal growth. The photocatalytic activity of the sample was 2.8 times that of P25.
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