Photoluminescence Properties and Photoactivities of N-doped TiO_2 Nano-powders with Oxygen Vacancies

In order to study the effect mechanism of N-doping on the visible-light photoactivity of TiO2,N-doped and un-doped TiO2 nano-powders were prepared by an acid-catalyzed sol-gel method and characterized by X-ray diffraction(XRD),X-ray photoelectron spectroscopy(XPS),electron spin resonance(ESR),UV-Vis diffuse reflection spectra(DRS),and photoluminescence spectra(PL)techniques.Their photoactivities are evaluated by the photocatalytic degradation of methylene blue(MB)in aqueous solution under UV light and visib...     

多酸基铜复合材料的合成及其催化还原硝基苯酚的研究

以Dawson结构的磷钨酸和缺位Keggin结构的硅钨酸为配体合成了铜复合微米材料,分别研究其结构形貌,并作为催化剂催化硼氢化钠还原对硝基苯酚、邻硝基苯酚和间硝基苯酚和铁氰化钾,结果表明,两种催化剂都能高效地催化还原反应,经比较其速率常数,基于硅钨酸合成的铜微米复合材料具有更高的催化活性.     

单壁碳纳米管的制备及其在储氢方面的应用

阐述了单壁碳纳米管制备技术的发展情况,展望其作为储氢材料在氢能利用领域的前景,探讨影响单壁碳纳米管制备及实际应用的几个关键影响因素及今后的发展方向.