Enzyme-Mimetic Catalyst-Modified Nanoporous SiO2鈥揅ellulose Hybrid Composites with High Specific Surface Area for Rapid H2O2 Detection

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• 作者：Yijun Jiang ; Wei Wang ; Xiutao Li ; Xicheng Wang ; Jianwei Zhou ; Xindong Mu
• 刊名：ACS Applied Materials & Interfaces
• 出版年：2013
• 出版时间：March 27, 2013
• 年：2013
• 卷：5
• 期：6
• 页码：1913-1916
• 全文大小：279K
• 年卷期：v.5,no.6(March 27, 2013)
• ISSN：1944-8252

文摘

Mesoporous silica鈥揷ellulose hybrid composites were prepared by surface sol鈥揼el coating process on nature cellulose substance. The template CTAB (hexadecyl trimethyl ammonium Bromide) in the silica film can be removed by extraction to obtain high specific surface area (80.7 m² g^鈥?), which is 2 orders of magnitude higher than that of raw cellulose. In the following, the enzyme-mimetic catalyst and chromogenic agent were introduced onto the hybrid system. Just as the peroxidase, the resultant hybrid material exhibits extraordinary sensitivity for the H₂O₂ and shows an immediate and obvious color change. The detection limit is about 1 渭mol L^鈥? by the naked eye.

Keywords:

mesoporous silica; hybrid nanostructures; enzyme-mimetic catalyst; H₂O₂ detection