Preparation and Characterization of Strong-lightweight Porous Silica Spheres in Millimeter Scale†

doi:10.7503/cjcu20150246

Abstract

Abstract:

Strong-lightweight porous silica spheres in millimeter scale were synthesized using cationic surfactant hexadecyltrimethyl ammonium bromide(CTAB) and nonionic surfactant F127 as templates, tetraethyl orthosilicate(TEOS) as silica source in liquid paraffin/water(W/O) system via self-assembly.The samples were characterized by means of laser particle size analyzer, scanning electron microscopy(SEM), transmission electron microscopy(TEM), nitrogen adsorption-desorption measurments and nanoindentor.The results indicate that spheres with diameter of (1.4±0.2) mm are obtained, the hierarchical pores with the size from 2 nm to tens of nanometers are within the samples, and the BET surface area of the sample is 498.00 m²/g. In addition, the bulk density of the sample is just 0.44 g/cm³, but its hardness is up to 549.00 MPa and elasticity modulus sums up to 9.19 GPa.

Key words: Porous silica spheres in millimeter scale, Strong-lightweight silica, Liquid paraffin/water system

CLC Number:

O613

TrendMD:

LI Wa, LI Fengyun, SHI Zhisheng, HUANG Jue, CAI Qiang, ZHANG Wei. Preparation and Characterization of Strong-lightweight Porous Silica Spheres in Millimeter Scale^†[J]. Chem. J. Chinese Universities, 2015, 36(9): 1655.

Figures/Tables 6

Fig.1 Optical images(A, B) and particle size distributions(C, D) of the as-synthesized sample 1(A, C) and sample 2(B, D)

Fig.2 SEM images of the as-synthesized sample 1(A, B) and sample 2(C, D)Inset image in (C) shows the mesoporous silica vesicles.

Fig.3 TEM images of the as-synthesized sample 2(A) and mesoporous silica vesicles(B)

Fig.4 Nitrogen adsorption-desorption isotherms obtained at 77 K(A) and the corresponding pore size distribution(B) of the as-synthesized sample 2

Table 1 Density and nano-indentation hardness of the as-synthesized samples

Sample	m/g	V/cm³	ρ/(g·cm^-3)	Elasticity modulus/GPa	Hardness/MPa
1	3.894	5.00	0.78	0.84	54
2	1.765	4.00	0.44	9.19	549

Fig.5 SEM images of the selected location for nanoindentation of the as-synthesized sample 2(A, B) and load-displacement curves for one selected porous silica sphere of sample 1(C) and sample 2(D)

References 18

[1]	Wang L. Q., Shin Y., Samuels W. D., J. Phys. Chem., 2003, 107, 13793—13802
[2]	Kaskel S., Farrusseng D., Schlichte K., J. Chem. Commun., 2000, 24, 2481—2482
[3]	Haskouri J., Cabrera S., Sapina F., Latorre J., Amomos P., J. Adv. Mater., 2001, 13, 192—195
[4]	Fan J., Yu C. Z., Gao T., Angew. Chem. Int. Ed., 2003, 42, 3146—3150
[5]	Jaroniec M., Kruk M., Olivier J. P., Langmuir, 1999, 15, 5410—5413
[6]	Brown J., Mercier L., Pinnavaia T. J., Chem. Commun., 1999, 1, 69—70
[7]	Wang H. N., Rong X., Huang W. Q., Han L., Wang T., Chen R. R., Chem. J. Chinese Universities, 2014,35(12), 2516—2522
	(王红宁, 戎宵, 黄维秋, 韩路, 王涛. 高等学校化学学报, 2014, 35(12), 2516—2522)
[8]	Liu F. J., Han B., Cao Y., Zou Y. C., Meng X. J., Xiao F. S., Chem. J. Chinese Universities, 2012, 33(9), 1908—1914
	(刘福建, 韩冰, 曹阳, 邹永存, 孟祥举, 肖丰收. 高等学校化学学报, 2012, 33(9), 1908—1914)
[9]	Chen K. J., Liang H. F., Chen H. L., ACS Nano., 2012, 7, 438—446
[10]	Thomas C. R., Ferris D. P., Lee J. H., J. Am. Chem. Soc., 2010, 132, 10623—10625
[11]	Ruiz-Hernandez E., Baeza A., Vallet-Regií M., ACS Nano, 2011, 5, 1259—1266
[12]	Chen L. H., Li X. Y., Tian G., Angew. Chem. Int. Ed., 2011, 50, 11156—11161
[13]	Huo Q., Feng J., Schüth F., J. Chem. Mater., 1997, 9, 14—17
[14]	Lu Y., Fan H., Stump A., Nature, 1999, 398, 223—226
[15]	Peng C., Mu M. W., Xie S. H., Cai Q., Chem. J. Chinese Universities, 2014, 35(9), 1864—1870
	(彭策, 牟鸣薇, 谢诗航, 蔡强. 高等学校化学学报, 2014, 35(9), 1864—1870)
[16]	Mu M. W., Peng C., Wang S., Jin C. Y., Cao X. Y., Cai Q., Chem. J. Chinese Universities, 2013, 34(6), 1309—1312
	(牟鸣薇, 彭策, 王颂, 金春阳, 曹献英, 蔡强. 高等学校化学学报, 2013, 34(6), 1309—1312)
[17]	Gregg S., Sing K., Adsorption, Surface Area and Porosity, 2nd Ed., Academic Press, London, 1982, 42—237
[18]	Lind A., Spliethoff B., Linden M., J. Chem. Mater., 2003, 15, 813—818