Synthesis of Length Controllable Ordered Mesoporous Rodslike SBA-15 by Co-surfactant Method†

doi:10.7503/cjcu20130814

Abstract

Abstract:

SBA-15 rods with different lengths(from hexagonal paticials to short rods, and to longer rods) were synthesized via triblock copolymer P123 as a structure-directing agent and chitosan as a co-surfactant. The results show that chitosan is indispensable for tuning the length of SBA-15 rods. Addition of chitosan could improve the periodicity of the SBA-15 and the specific surface area and total proe volume are increased to 1157 cm²/g and 1.53 cm³/g, respectively.

Key words: SBA-15, Morphology control, Chitosan

CLC Number:

O611.4

TrendMD:

WANG Min, LI Dong, CAI Wenjing, JIANG Nanzhe. Synthesis of Length Controllable Ordered Mesoporous Rodslike SBA-15 by Co-surfactant Method^†[J]. Chem. J. Chinese Universities, 2014, 35(1): 26.

Figures/Tables 4

Fig.1 Small angle XRD patterns of CS-0(a),CS-1(b), CS-2(c) and CS-3(d)

Fig.2 Nitrogen adsorption-desorption(A) and pore size distribution curves(B) of four mesoporous SBA-15 samplesa. CS-0; b. CS-1; c. CS-2; d. CS-3.

Table 1 Textural properties of mesoporous silica SBA-15 samples*

Sample	w(CS)/g	a₀/nm	S_BET/(m²·g^-1)	V_p/(cm³·g^-1)	D/nm	Wall thickness/nm
CS-0	0	11.07	769	1.21	7.24	3.8
CS-1	0.1	10.61	809	1.24	6.34	4.3
CS-2	0.2	11.57	1157	1.53	7.24	4.3
CS-3	0.4	11.07	847	1.10	6.34	4.7

Fig.3 SEM images of CS-0(A), CS-1(B), CS-2(C) and CS-3(D)

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