Sol-gel preparation of mesoporous Al2O3-SiO2 glasses: structural evolution monitored by solid state NMR

CORC > 上海光学精密机械研究所 > 中国科学院上海光学精密机械研究所 > 中科院强激光材料重点实验室

	Sol-gel preparation of mesoporous Al2O3-SiO2 glasses: structural evolution monitored by solid state NMR
	Ren, Jinjun ; Zhang, Long ; Eckert, Hellmut
刊名	j. sol-gel sci. technol.
	2014
卷号	70 期号:3 页码:482
关键词	Silica-alumina Aluminum lactate Solid state NMR Mesoporous glasses
通讯作者	eckert, h (reprint author), univ munster, inst phys chem, corrensstr 30, d-48149 munster, germany.
英文摘要	glasses along the composition line 0.5al(2)o(3)-xsio(2) (1 a parts per thousand currency sign x a parts per thousand currency sign 6) were prepared via a novel sol-gel route using tetraethylorthosilicate and aluminum lactate as precursors. the structural evolution from solution to gel to glass is monitored by standard al-27 and si-29 nuclear magnetic resonance (nmr) spectroscopies, revealing important insights about molecular level mechanisms occurring at the various stages of glass formation. under the experimental conditions reported, silica and alumina precursors undergo homoatomic condensation processes when the gel is heat treated at about 100 and 300 a degrees c, respectively, and only little heteroatomic co-condensation occurs in this temperature range. the latter is promoted only upon elimination of the residual lactate and water ligands upon annealing the gels above 300 a degrees c. following calcination at 650 a degrees c, mesoporous glasses are obtained, having average pore diameter of about 3 nm and a surface areas near 500 m(2)/g. si-o-al connectivities are detected by si-29 magic angle spinning (mas)-nmr. al-27 mas-nmr spectra reveal aluminum in four-, five- and six-coordination. the spectra differ significantly from those of other sol-gel derived al2o3-sio2 materials prepared from different precursor routes, suggesting that the lactate route results in a higher degree of compositional homogeneity.
收录类别	SCI
语种	英语
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.siom.ac.cn/handle/181231/13783]
专题	上海光学精密机械研究所_中科院强激光材料重点实验室
作者单位	1.[Ren, Jinjun 2.Eckert, Hellmut] Univ Munster, Inst Phys Chem, D-48149 Munster, Germany 3.[Zhang, Long] Chinese Acad Sci, Shanghai Inst Opt & Fine Mech, Shanghai 201800, Peoples R China 4.[Eckert, Hellmut] Univ Sao Paulo, Inst Fis Sao Carlos, BR-13590 Sao Car
推荐引用方式 GB/T 7714	Ren, Jinjun,Zhang, Long,Eckert, Hellmut. Sol-gel preparation of mesoporous Al2O3-SiO2 glasses: structural evolution monitored by solid state NMR[J]. j. sol-gel sci. technol.,2014,70(3):482.
APA	Ren, Jinjun,Zhang, Long,&Eckert, Hellmut.(2014).Sol-gel preparation of mesoporous Al2O3-SiO2 glasses: structural evolution monitored by solid state NMR.j. sol-gel sci. technol.,70(3),482.
MLA	Ren, Jinjun,et al."Sol-gel preparation of mesoporous Al2O3-SiO2 glasses: structural evolution monitored by solid state NMR".j. sol-gel sci. technol. 70.3(2014):482.