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纳米Ni/TiO₂介孔复合体的组装及结构表征研究

Synthesis and Structure Characteristics of Nano-sized Ni/TiO₂ Mesoporous Composites

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【Author】 WANG De-bao 1, WU Yu-cheng 1,2, WANG Wen-fang 1, SONG Guang-ming 3, ZHENG Yu-chun 1, HUANG xin-min 1, LI Guang-hai 2, ZHANG Li-de 2 (1. Hefei University of Technology, Hefei 230009, Anhui, China; 2 Institute of Solid State Physics, Chinese Academy of Sciences, Hefei 230031, Anhui,China; 3. Institute of Intelligent Machinery, Chinese Academy of Sciences, Hefei 230031, Anhui, China)

【机构】合肥工业大学材料学院；中国科学院智能机械研究所；中国科学院固体物理研究所；中国科学院固体物理研究所安徽合肥230009；安徽合肥230009；安徽合肥230031；安徽合肥230009；安徽合肥230031；

【摘要】采用溶胶凝胶工艺制备纳米Ni TiO2 介孔组装复合体。用BET、DSC TGA、XRD及TEM等手段研究其比表面积、晶粒大小、结构及相变特性。结果表明 :在反应溶剂中加入DCCA(干燥控制剂 )和提高n(EtOH) n(Ti)值 (醇钛比 )可使孔径分布由分散变为集中 ,孔容也有所增大 ,Ni的加入明显抑制了基体TiO2 的A—R(锐钛矿—金红石 )的相变 ,使相变温度大大提高更多还原

【Abstract】 Nano-sized Ni/TiO 2 mesoporous composites solids were synthesized using sol-gel method. The specific surface area, grain size, structure and phase properties of nano-sized Ni/TiO 2 mesoporous composites solids were studied by BET, DSC-TGA, XRD, TEM. The results show that adding DCCA into the reactive solvent and increasing the rate of n[EtOH] and n[Ti] can both make the pore diameter distribution become concentrated and pore volume increased. The addition of Ni obviously restrains the A—R phase transformation, thus increasing temperature of phase transformation.更多还原