Low temperature hydrothermal precipitation and structural analysis of HTlc-Cl2-CO3 rod-shaped crystals
WU Jiansong1， PENG Chunyan2， YANG Yifeng2， HE Ziying2
1.School of Chemical and Chemical Engineering， Lingnan Normal University， Zhanjiang， Guangdong 524048， China；2.School of biological science and technology， Lingnan Normal University， Zhanjiang， Guangdong 524048， China
Abstract：High-quality HTlc-Cl2-CO3 rods were synthesized via a low temperature hydrothermal method using MgCl2·6H2O and Al(NO3)3·9H2O as raw materials and Na2CO3-NaHCO3 buffer solution as precipitant. The rod-shaped crystals were characterized by X-ray diffraction， transmission electron microscope， and Brunauer-Emmett-Teller N2 surface area measurement. In addition， the influence of buffer solution concentration on the characteristics of the rod-shaped crystals were investigated. The results showed that the buffer solution concentration had significant impact on rod-shaped crystals with intercalated structure. Overall， HTlc-Cl2-CO3 rods with well-defined geometry， distinct intercalated structure， high quality， and good dispersion capability were able to be obtained under the following conditions： buffer solution volume ratio of 37.5%， reaction temperature of 50°C， and reaction time of 196 h. Optimized concentration of buffer solution would provide favorable environment for crystal growth and effectively prevent disordered growth， maintaining stable pH value to prevent amorphous precipitation. The cell parameters values and channel height of HTlc-Cl2-CO3 were be calculated based on the numerical value of the diffraction，and a＝0.308 nm， c＝2.157 nm， h＝0.242 nm is obtained.
2019, Vol. 53 
