自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
自然科学版 英文版
英文版编委
自然科学版 英文版
英文版首届青年编委

您目前所在的位置:首页 - 期刊简介 - 详细页面

中南大学学报(英文版)

Journal of Central South University

Vol. 25    No. 3    March 2018

[PDF Download]    [Flash Online]

    

Preparation of α-calcium sulfate hemihydrate whiskers with high aspect ratios in presence of a minor amount of CuCl2·2H2O
GUAN Qing-jun(管青军), SUN Wei(孙伟), LIU Run-qing(刘润清),YIN Zhi-gang(殷志刚), ZHANG Chen-hu(张谌虎)

School of Mineral Processing and Bioengineering, Central South University, Changsha 410083, China

Abstract:In order to produce α-calcium sulfate hemihydrate (α-CaSO4·0.5H2O) whiskers with high aspect ratios, a minor amount of CuCl2·2H2O was used as the modifying agent in the process of hydrothermal treatment of calcium sulfate dihydrate (CaSO4·2H2O) precursor. The presence of 2.60×10–3 mol/L CuCl2·2H2O resulted in the increase of the aspect ratios of α-CaSO4·0.5H2O whiskers from 81 to 253. The preferential adsorption of Cu2+ on the negative {110} and {100} facets of α-CaSO4·0.5H2O crystal structures was confirmed by EDS and XPS. And ATR-FTIR demonstrated the ligand adsorption of Cu2+ on the surface of α-CaSO4·0.5H2O whiskers. The experimental results reveal that the whiskers with high aspect ratios are attributed to the adsorption of Cu2+, which promotes the 1-D growth of α-CaSO4·0.5H2O whiskers along the c axis.

 

Key words: α-CaSO4·0.5H2O whisker; CuCl2·2H2O; hydrothermal treatment; aspect ratio

中南大学学报(自然科学版)
  ISSN 1672-7207
CN 43-1426/N
ZDXZAC
中南大学学报(英文版)
  ISSN 2095-2899
CN 43-1516/TB
JCSTFT
版权所有:《中南大学学报(自然科学版、英文版)》编辑部
地 址:湖南省长沙市中南大学 邮编: 410083
电 话: 0731-88879765(中) 88836963(英) 传真: 0731-88877727
电子邮箱:zngdxb@csu.edu.cn 湘ICP备09001153号