标题:Effects of inorganic acids and divalent hydrated metal cations (Mg2+, Ca2+, Co2+, Ni2+) on gamma-AlOOH sol-gel process
作者:Zhang, Jian; Xia, Yuguo; Zhang, Li; Chen, Dairong; Jiao, Xiuling
作者机构:[Zhang, Jian; Chen, Dairong; Jiao, Xiuling] Shandong Univ, Sch Chem & Chem Engn, Jinan 250100, Peoples R China.; [Xia, Yuguo; Zhang, Li; Chen, Dairo 更多
通讯作者:Xia, YG
通讯作者地址:[Xia, YG]Shandong Univ, Natl Engn Res Ctr Colloidal Mat, Jinan 250100, Peoples R China.
来源:PHYSICAL CHEMISTRY CHEMICAL PHYSICS
出版年:2015
卷:17
期:41
页码:27391-27398
DOI:10.1039/c5cp03859f
摘要:In-depth understanding of the sol-gel process plays an essential role in guiding the preparation of new materials. Herein, the effects of different inorganic acids (HCl, HNO3 and H2SO4) and divalent hydrated metal cations (Mg2+, Ca2+, Co2+, Ni2+) on gamma-AlOOH sol-gel process were studied based on experiments and density functional theory (DFT) calculations. In these experiments, the sol originating from the gamma-AlOOH suspension was formed only with the addition of HCl and HNO3, but not with H2SO4. Furthermore, the DFT calculations showed that the strong adsorption of HSO4- on the surface of the gamma-AlOOH particles, and the hydrogen in HSO4- pointing towards the solvent lead to an unstable configuration of electric double layer (EDL). In the experiment, the gelation time sequence of gamma-AlOOH sol obtained by adding metal ions changed when the ionic strength was equal to or greater than 0.198 mol kg(-1). The DFT calculations demonstrated that the adsorption energy of hydrated metal ions on the g-AlOOH surface can actually make a difference in the sol-gel process.
收录类别:SCOPUS;SCIE
WOS核心被引频次:1
Scopus被引频次:1
资源类型:期刊论文
原文链接:https://www.scopus.com/inward/record.uri?eid=2-s2.0-84944348284&doi=10.1039%2fc5cp03859f&partnerID=40&md5=dbd0891ebecd030b6ca1e39dba699ebb
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