Effect of Mg2+ on Hydrothermal Formation of 伪-CaSO4路0.5H2O Whiskers with High Aspect Ratios

详细信息    查看全文

• 作者：Sichao Hou ; Jing Wang ; Xiaoxue Wang ; Haoyuan Chen ; Lan Xiang
• 刊名：Langmuir
• 出版年：2014
• 出版时间：August 19, 2014
• 年：2014
• 卷：30
• 期：32
• 页码：9804-9810
• 全文大小：540K
• ISSN：1520-5827

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.