Mineralogy and Thermal Analysis of Natural Pozzolana Opal Shale with Nano-pores  

作　　者：贾援 王宝民 

机构地区：[1]School of Civil Engineering, Dalian University of Technology, Dalian 116024, China

出　　处：《Journal of Wuhan University of Technology(Materials Science)》2017年第3期532-537,共6页武汉理工大学学报（材料科学英文版）

基　　金：Funded by the National Natural Science Foundation of China(Nos.51278086,51578108);Special Fund for Scientific Research in the Public Interest by Ministry of Water Resource of the People’s Republic of China(No.201501003)

摘　　要：Thermodynamic stability, microvoid distribution and phases transformation of natural pozzolana opal shale（POS） were studied systematically in this work. XRD analysis showed that opal-CT, including microcrystal cristobalite and tridymite, is a major component of POS. DTA and FT-IR indicated that there were many hydroxyl groups and acid sites on the surface of amorphous SiO2 materials. FE-SEM analysis exhibited amorphous SiO2 particles（opal-A） covering over stacking sequences microcrystal cristobalite and tridymite. Meanwhile, MIP analysis demonstrated that porosity and pore size distribution of POS remained uniform below 600 ℃. Because stable porous microstructure is a key factor in improving photocatalyst activity, POS is suited to preparing highly active supported.Thermodynamic stability, microvoid distribution and phases transformation of natural pozzolana opal shale（POS） were studied systematically in this work. XRD analysis showed that opal-CT, including microcrystal cristobalite and tridymite, is a major component of POS. DTA and FT-IR indicated that there were many hydroxyl groups and acid sites on the surface of amorphous SiO2 materials. FE-SEM analysis exhibited amorphous SiO2 particles（opal-A） covering over stacking sequences microcrystal cristobalite and tridymite. Meanwhile, MIP analysis demonstrated that porosity and pore size distribution of POS remained uniform below 600 ℃. Because stable porous microstructure is a key factor in improving photocatalyst activity, POS is suited to preparing highly active supported.

关 键 词：pozzolana opal shale cyclic utilization thermal analysis mineralogy analysis nano-pore 

分 类 号：TB321[一般工业技术—材料科学与工程] TB383.1