高校化学工程学报2017，Vol.31Issue(2)：413-419,7.DOI:10.3969/j.issn.1003-9015.2017.00.008
Al3+对水热法制备α-CaSO4·0.5H2O晶须的影响
Effects of Al3+onα-CaSO4·0.5H2O Whisker Formation in Hydrothermal Conditions
摘要
Abstract
The effects of Al3+ (Al2(SO4)3·18H2O) on hydrothermal formation of α-CaSO4·0.5H2O whiskers were investigated under condition of reaction temperature 130℃, stirring speed 60 r·min-1 and reaction time 90 min. α-CaSO4·0.5H2O whiskers with shorter diameters and smaller aspect ratios are synthesized with Al3+ in solution at concentrations of 4.50×10-3 mol·L-1 and 9.03×10-3 mol·L-1, which indicates that Al3+ is a crystal inhibitor and can produce α-CaSO4·0.5H2O whiskers with lower aspect ratios. The possible doping of Al3+ in α-CaSO4·0.5H2O whiskers with decreased interplanar spacing (rather than replacing Ca2+) is confirmed by XPS and XRD analysis, and SEM and EDS results confirm the adsorption of Al3+ on whisker surface. The preferential adsorption sites are (001) and (002) facets, which results in smaller aspect ratios.关键词
铝离子/晶型抑制剂/硫酸钙晶须/长径比/分布/水热法/化学反应/结晶Key words
Al3+/crystal inhibitor/calcium sulphate whisker/aspect ratio/distribution/hydrothermal method/chemical reaction/crystallization分类
数理科学引用本文复制引用
方羊,窦焰,孙祥斌,沈浩,郑之银,刘荣,崔鹏..Al3+对水热法制备α-CaSO4·0.5H2O晶须的影响[J].高校化学工程学报,2017,31(2):413-419,7.基金项目
安徽省创新环境建设专项项目(1606a1003040). （1606a1003040）
