A convenient route to synthesize SBA-15 rods with tunable pore length for lysozyme adsorption

• DOI: 10.1016/j.micromeso.2012.11.028
• Publication Date: 2012-11-29T02:46:27Z
• Authors: Yi Ding; Guangfu Yin; Xiaoming Liao; Zhongbing Huang; Xianchun Chen; Yadong Yao; Jun Li
• Keywords: Rod

Abstract Highly ordered SBA-15 rods with tunable length and width have been synthesized by using nonionic surfactant P123 (EO20PO70EO20) as a structure-directing agent without any additives. SBA-15 rods with varying lengths (0.6–3.0 μm) and widths (0.26–0.40 μm) were tuned by simply adjusting the HCl concentration in the range of 0.5–2.5 M. The acidity was identified to be the key factor affecting the growing manner of the rod-like particles. It was found that the length of these SBA-15 rods decreased with the increase of the HCl concentration in the synthetic mixture, while the width increased slightly. Based on our results, a possible mechanism for the effect of the HCl concentration on the growing manner of the rod-like particles was proposed. Furthermore, adsorption of lysozyme (LYS) on these SBA-15 rods was investigated and the results showed that the shorter rods with shorter pore length demonstrated very rapid LYS adsorption (