Mineralogy and Thermal Analysis of Natural Pozzolana Opal Shale with Nano-pore
With special physicochemical properties,the modifications and uses of natural pozzolana opal shale (POS) have attracted more and more attention.In this study,the prepared materials were characterized by X-ray diffraction (XRD),differential thermal analysis (DTA),fourier transform infrared spectrometry (FT-IR),automated mercury porosimeter (AMP) and field emission scanning electron microscope (FE-SEM).The XRD analysis showed that opal-CT,including microcrystal cristobalite and tridymite,is a major component of POS.DTA and FT-IR indicated there were many hydroxyl groups and acid sites on the surface of amorphous SiO2 materials.FE-SEM analysis exhibited amorphous SiO2 particles (opal-A) cover over stacking sequences microcrystal cristobalite and tridymite.Meanwhile,AMP analysis demonstrated porosity and pore size distribution of POS can remain uniformity below 600 ℃.Because smaller particles size,stable and inerter porous microstructure could be key factor in improving photocatalyat activity,POS might be suited to preparing highly active supported.
pozzolana opal shale mineralogy analysis,thermal analysis,opaline phases,nano-pore
Yuan Jia Baomin Wang
School of Civil Engineering, Dalian University of Technology, Dalian 116024, China
国内会议
中国大坝工程学会水库泥沙处理与资源利用技术专业委员会成立大会
长沙
英文
267-279
2017-11-09（万方平台首次上网日期，不代表论文的发表时间）