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首页> 外文期刊>Journal of Materials Science >Transformation of microporous titanium glycolate nanorods into mesoporous anatase titania nanorods by hot water treatment
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Transformation of microporous titanium glycolate nanorods into mesoporous anatase titania nanorods by hot water treatment

机译：热水处理将微孔乙醇酸钛纳米棒转变为介孔锐钛型二氧化钛纳米棒

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摘要

High surface area titanium glycolate microporous multi-faceted nanorods were synthesized from the reaction of titanium alkoxides (Ti(OEt)(4), Ti(O (i) Pr)(4), or Ti(O (n) Bu)(4)) with ethylene glycol, using a sol-gel reflux method. The specific surface area of the as-synthesized titanium glycolate nanorods obtained from Ti(OEt)(4) is similar to 480 m(2)/g. A hot water treatment at 90 A degrees C for 1 h transformed the titanium glycolate microporous nanorods into mesoporous anatase TiO2 nanorods. The shape of the nanorods was conserved after hot water treatment and the microporous to mesoporous transformation took place without significant change in the surface area (477 m(2)/g). Micro Raman spectroscopy, scanning electron microscopy, transmission electron microscopy, X-ray diffraction, solid state NMR, and nitrogen adsorption/desorption were used to characterize the samples. As a demonstration of potential applications, the thus formed mesoporous anatase TiO2 nanorods were tested for their photocatalytic efficiency in the degradation of crystal violet, and a photodegradation mechanism is proposed.
机译：高表面积乙醇酸钛微孔多面纳米棒是由钛醇盐（Ti（OEt）（4），Ti（O（i）Pr）（4）或Ti（O（n）Bu）（4）的反应合成的））和乙二醇，采用溶胶-凝胶回流法。从Ti（OEt）（4）获得的合成的乙醇酸钛酸钛纳米棒的比表面积类似于480 m（2）/ g。在90 A摄氏度下进行1小时的热水处理，将乙醇酸钛微孔纳米棒转变为中孔锐钛矿型TiO2纳米棒。纳米棒的形状在热水处理后得以保留，并且发生了从微孔到中孔的转变，表面积没有明显变化（477 m（2）/ g）。显微拉曼光谱，扫描电子显微镜，透射电子显微镜，X射线衍射，固态NMR和氮吸附/解吸用于表征样品。作为潜在应用的证明，测试了如此形成的介孔锐钛矿型TiO2纳米棒在结晶紫的降解中的光催化效率，并提出了光降解机理。

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