以酵母粉为模板制备的多孔/中空TiO_2的储氢性能研究(英文)  

Hydrogen Storage Property of Porous/Hollow TiO_2 Using Yeast as Template

作　　者：赵忠义[1] 陈慧苗 王宁[1] 柴玉俊[1] 

机构地区：[1]河北师范大学,河北石家庄050024

出　　处：《稀有金属材料与工程》2013年第12期2467-2471,共5页Rare Metal Materials and Engineering

基　　金：National Natural Science Foundation of China(50901030);Youth Foundation of Hebei Normal University(L2008Q07);Fund of Hebei Education Department(2010256)

摘　　要：研究表明:在620℃煅烧后,模板除去,TiO2形成。产物主要由TiO2和少量的H2Ti3O7组成。得到的产物的比表面积为252.6m2/g。P-C-I测试结果表明,30℃时TiO2显示可逆的吸/放氢过程。在吸/放氢过程中,化学键发生微小的偏移,表明氢可能和OH基团发生反应。随着吸/放氢循环的增加以及比表面积的明显的降低,多孔/中空TiO2坍塌。同时,随着温度的升高,化学吸附量增加,吸氢量升高。The hydrogen storage property of the porous/hollow TiO2 using yeast as template was investigated. It is demonstrated that crystalline TiO2 forms until the temperature reaches 620 ℃. The product is composed of TiO2 and minor amount of H2Ti3O7 after heat treatment. The porous/hollow TiO2 with a specific surface area of 252.6 m2/g is obtained due to the removal of yeast. Pres- sure-composition isothermal （P-C-I） curve of TiO2 shows that a reversible hydriding/dehydridng process occurs at 30 ℃, suggesting an obvious physisorption. The change of the chemical bond in Fourier-transform infrared （FT-IR） spectrum in hydriding/dehydridng indicates that hydrogen reacts with OH group on TiO2 surface even at 30 ℃. The porous/hollow TiO2 collapses as cycles increase and the corresponding specific surface area decreases dramatically. Contrary, the hydrogen uptake increases with increasing of tem- perature, which is caused by chemisorption.

关 键 词：储氢材料 多孔 空心材料 酵母粉 TIO2 

分 类 号：O614.411[理学—无机化学]