One-step synthesis of highly dispersed nanosheets of magadiite

被引：5
|
作者：
Yuan, Zhiqing [1 ]
Tao, Weichuan [1 ]
Wang, Zhendong [1 ]
Yang, Weimin [1 ]
机构：
[1] Sinopec Shanghai Res Inst Petrochem Technol, State Key Lab Green Chem Engn & Ind Catalysis, Shanghai 201208, Peoples R China
来源：
APPLIED CLAY SCIENCE | 2019年 / 181卷
基金：
国家重点研发计划;
关键词：
Magadiite; Layered silicates; Dispersion; Complexation; Polyethylene glycol; ORGANIC-INORGANIC NANOCOMPOSITES; LAYERED SILICATE MAGADIITE; NA-MAGADIITE; HYDROTHERMAL SYNTHESIS; CATALYTIC PERFORMANCE; INTERLAYER SPACE; HYBRID MATERIALS; H+-MAGADIITE; METAL-IONS; INTERCALATION;
D O I：
10.1016/j.clay.2019.105231
中图分类号：
O64 [物理化学（理论化学）、化学物理学];
学科分类号：
070304 ; 081704 ;
摘要：
By using the combination of PEG 300 (polyethylene glycol with average molecular weight of 300) and sodium salts, highly dispersed nanosheets of magadiite were directly obtained from hydrothermal synthesis. The total concentration of sodium ions(Na+/PEG 300), the crystallization time and the stirring speed are three key parameters that determine the dispersion of magadiite. As the molar ratio of Na+/PEG 300 was increased to 0.96 or above, highly dispersed nanosheets of magadiite were synthesized. By increasing the stirring speed, magadiite becomes more stable and its dispersity is greatly enhanced. Based on these results, a mechanism for the formation of dispersed magadiite has been proposed, in which "in situ delamination" was assumed.
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页数：8
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