Citation: LIU Yu-Liang, YOU Cui-Rong, LI Yang, HE Tao, ZHANG Xiang-Qin, SUO Zhang-Huai. Preparation of Au@TiO₂ Catalyst Using Escherichia Coil as the Template and Its Oxidation Reaction Activity toward CO[J]. Acta Physico-Chimica Sinica, ;2010, 26(09): 2455-2460. doi: 10.3866/PKU.WHXB20100909 shu

Preparation of Au@TiO₂ Catalyst Using Escherichia Coil as the Template and Its Oxidation Reaction Activity toward CO

1.
Chemistry and Biology College, Yantai University, Yantai 264005, Shandong Province, P. R. China

Received Date: 17 March 2010
Available Online: 12 July 2010
Fund Project: 国家自然科学基金(20473070, 20973148)资助项目 (20473070, 20973148)

Many microorganisms can adsorb metal ions strongly and even reduce them to their metal states. We studied the adsorption of ld nanoparticles on Escherichia coil (DH5α) to form Au@DH5α. Titanium tetrabutoxide was added to Au@DH5αto prepare Au@DH5α-Ti(OH)₄ by hydrolysis. The DH5αtemplate was removed by calcination in air to obtain the Au@TiO₂ catalyst. These materials were characterized by N₂ adsorption, X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (UV-Vis DRS), thermogravimetry-differential thermal analysis (TG-DTA), and transmission electron microscopy (TEM). The results show that the ld catalyst maintains a rod-like structure similar to DH5αand the porous structure of the titanium oxide prepared using DH5αas a biological template can prevent the aggregation of ld nanoparticles to some extent. With higher amounts of DH5αdosage, smaller ld nanoparticles were obtained and the surface plasmon absorption of ld nanoparticles shifted toward shorter wavelengths. The obtained ld catalyst has a larger surface area than the catalyst prepared by the impregnation method. However, this increases the coke content of the catalyst. Catalytic activity was evaluated by the CO oxidation reaction. We found that with a DH5αdosage of 100 or 150 mL, the obtained ld catalyst can convert CO to CO₂ completely at 80 ℃.
- Titaniumoxide,
- Escherichia coil,
- Template agent,
- ld catalyst,
- CO oxidation
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Preparation of Au@TiO2 Catalyst Using Escherichia Coil as the Template and Its Oxidation Reaction Activity toward CO

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通讯作者: 陈斌, bchen63@163.com

Preparation of Au@TiO₂ Catalyst Using Escherichia Coil as the Template and Its Oxidation Reaction Activity toward CO