摘要
采用 5种不同的纳米二氧化钛为光催化剂 ,考察了它们在丙炔水解反应中的光催化活性 ,并用X射线衍射和漫反射紫外 可见吸收光谱技术进行了表征 .研究了催化剂表面物理化学性质与在丙炔光催化水解反应中的构效关系 .实验结果表明 ,纳米二氧化钛光催化剂能够引发丙炔的光催化水解反应 ,生成乙烷和乙烯等产物 ;锐钛矿相纳米二氧化钛具有较高的光催化活性 ,在晶型相同的情况下 ,影响光催化活性的主要因素是催化剂的粒径和比表面积 .
Five kinds of nanosized titania were used as photocatalysts for the hydrolysis of methylacetylene and characterized by X-ray diffraction and diffuse reflecta nce UV-Vis absorption spectroscopy. The relationship between the photocatalytic activity and the physico-chemical properties of the catalysts was investigate d. The results show that the nanosized titania photocatalysts can induce photo catalytic hydrolysis of methylacetylene to produce ethane, ethylene and other pr oducts. Nanosized titania with anatase exhibits higher photocatalytic activity. The main factors that affect the photocatalytic activity are grain size and surf ace area when the photocatalysts have the same crystal structure.
出处
《催化学报》
SCIE
CAS
CSCD
北大核心
2003年第11期845-848,共4页
基金
国家自然科学基金资助项目( 2 0 0 73 0 2 6)
教育部科技重点项目
上海市教委曙光计划
上海市纳米发展与促进中心纳米专项资助
关键词
纳米二氧化钛
光催化剂
丙炔
水解
紫外光辐射
nanosized titania, photocatalyst, methylacetylene, hydrolysis, ultraviolet ligh t irradiation
