A layered double hydroxide (LDH) with nitrate as the counter anion (LDH- NO3 with Mg/Al = 3) was, for the first time, successfully delaminated in formamide under ultrasonic treatment. Atomic force microscopy (AFM) images showed that a large part of the LDH was delaminated into single and double brucite layers (0.7 - 1.4 nm in thickness). The nano-sheets had disk- like shapes with a diameter of ca. 20-40 nm. Findings from AFM were in good agreement with the average hydrodynamic diameter determined using dynamic light scattering. Powder X-ray diffraction pattern of LDH dispersed in formamide also confirmed that LDH-NO3 was exfoliated. The dispersions of LDH in formamide were stable and transparent up to a concentration of 40 g L-1. However, formation of transparent gels was observed at concentrations higher than 5 g L-1. Delaminated LDH could be restacked by adding sodium carbonate or ethanol.
机构:Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
Chen, W
;
Feng, L
论文数: 0引用数: 0
h-index: 0
机构:Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
Feng, L
;
Qu, BJ
论文数: 0引用数: 0
h-index: 0
机构:
Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R ChinaUniv Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
机构:
Seoul Natl Univ, Sch Chem & Mol Engn, Natl Nanohybrid Mat Lab, Seoul 151747, South KoreaSeoul Natl Univ, Sch Chem & Mol Engn, Natl Nanohybrid Mat Lab, Seoul 151747, South Korea
机构:Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
Chen, W
;
Feng, L
论文数: 0引用数: 0
h-index: 0
机构:Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
Feng, L
;
Qu, BJ
论文数: 0引用数: 0
h-index: 0
机构:
Univ Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R ChinaUniv Sci & Technol China, State Key Lab Fire Sci, Hefei 230026, Anhui, Peoples R China
机构:
Seoul Natl Univ, Sch Chem & Mol Engn, Natl Nanohybrid Mat Lab, Seoul 151747, South KoreaSeoul Natl Univ, Sch Chem & Mol Engn, Natl Nanohybrid Mat Lab, Seoul 151747, South Korea