文摘
The effect of Mg2+ on hydrothermal formation of 伪-CaSO4路0.5H2O whiskers with high aspect ratios was investigated in this paper. 伪-CaSO4路0.5H2O whiskers with a preferential growth along the c axis and an average aspect ratio up to 370 were synthesized using hydrothermal treatment of CaSO4路2H2O precursor in the presence of 1.97 脳 10鈥? mol路L鈥? MgCl2. The preferential adsorption of Mg2+ on the negative (200), (400), and (020) facets was confirmed by EDS, XPS, and zeta potential measurements. ATR-FTIR analysis revealed the ligand adsorption of Mg2+ on the surface of 伪-CaSO4路0.5H2O. The doping of Mg2+ in 伪-CaSO4路0.5H2O whiskers was confirmed by the XRD analysis. The experimental results indicated that the adsorption and doping of Mg2+ promoted the 1-D growth of 伪-CaSO4路0.5H2O whiskers, leading to the formation of whiskers with high aspect ratios.