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首页> 外文会议>IUMRS International Conference in Asia >Hydrothermal Synthesis of Nanosized Titania Photocatalysts Using Novel Water-soluble Titanium Complexes
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Hydrothermal Synthesis of Nanosized Titania Photocatalysts Using Novel Water-soluble Titanium Complexes

机译：使用新型水溶性钛配合物的纳米二氧化钛光催化剂的水热合成

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Highly crystalline titania nano-particles were synthesized by hydrothermal method using novel stable water-soluble titanium complexes. It was confirmed that single phase anatase, rutile and brookite, which can be rarely synthesized as a single phase, can be obtained by varying the ligand in the complex and pH of the aqueous solution. TEM observations and BET specific surface area measurements had shown that these samples consisted of nanosized particles of 5～200 nm and had high specific surface areas of 25~150 m~2/g. According to UV-visible diffuse reflectance spectra, these titania samples absorbed light in the visible region (λ > 400 nm). Photocatalytic activities in NO oxidation reaction exhibited by synthesized titania powders under the irradiation by UV- visible light were higher than the activity of the commercial TiO_2 photocatalyst P25 (Degussa). Especially, under illumination by only visible light of above 510 nm wavelength, photocatalytic activity of the obtained specimens exceeded that of P25 more than four times. We also clearly demonstrated that single phase brookite had high photocatalytic activity for NO oxidation.
机译：通过使用新型稳定水溶性钛配合物通过水热法合成高度结晶的二氧化钛纳米颗粒。确认，通过改变水溶液的复合物和pH中的配体，可以获得单相锐钛矿，金红石和布鲁克钛矿，其可以很少合成为单相。 TEM观测和BET比表面积测量显示，这些样品由5〜200nm的纳米颗粒组成，并且具有25〜150m〜2 / g的高比表面积。根据UV可见散射反射光谱，这些二氧化钛样品在可见区域（λ> 400nm）中吸收光。通过UV-可见光照射的合成二氧化钛粉末没有氧化反应的光催化活性高于商用TiO_2光催化剂P25（Degussa）的活性。特别是，在仅通过高于510nm波长的可见光的照明下，所获得的标本的光催化活性超过P25以上的4倍。我们还清楚地表明，单相布鲁克石具有高光催化活性，无氧化。

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