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Aerosol Spray Pyrolysis Synthesis of Porous Anatase TiO_2 Microspheres with Tailored Photocatalytic Activity
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作者 Wen-Ge Li yan-jie hu +1 位作者 Hao Jiang Chun-Zhong Li 《Acta Metallurgica Sinica(English Letters)》 SCIE EI CAS CSCD 2019年第3期286-296,共11页
Porous titanium dioxide(TiO_2) microspheres(MS) were prepared by a facile ultrasonic spray pyrolysis process with commercial colloidal silica as a sacrificial template. The morphology structure, Brunauer–Emmett–Tell... Porous titanium dioxide(TiO_2) microspheres(MS) were prepared by a facile ultrasonic spray pyrolysis process with commercial colloidal silica as a sacrificial template. The morphology structure, Brunauer–Emmett–Teller surface areas and pore size distribution of TiO_2 microspheres were studied by changing the content and diameter of the silica template in detail. These porous micro-sized MS are composed of anatase TiO_2 nanocrystallites of 5–10 nm and have unique bimodal mesopores. The largest specific surface area of 112.3 m^2/g has been achieved using 60 wt% 20 nm silica as a template.When used as photocatalysts, the best photocatalytic activity of the as-prepared porous MS is comparable to commercial P25 nanopowders. Moreover, the micro-size and tailored properties from the design that appear during the ultrasonic spray pyrolysis process give these porous MS a promising application in photocatalytic reaction. 展开更多
关键词 Ultrasonic spray PYROLYSIS TiO2 MICROSPHERES POROUS structure PHOTODEGRADATION
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