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Hydrogen Storage Property of Porous/Hollow TiO2 Using Yeast as Template
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Hydrogen Storage Property of Porous/Hollow TiO2 Using Yeast as Template
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National Natural Science Foundation of China (50901030); Youth Foundation of Hebei Normal University (L2008Q07); Fund of Hebei Education Department (2010256)

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    摘要:

    研究表明：在620 ℃煅燒后，模板除去，TiO2形成。產(chǎn)物主要由TiO2 和少量的H2Ti3O7組成。得到的產(chǎn)物的比表面積為252.6 m2/g。P-C-I測試結(jié)果表明，30 ℃時TiO2顯示可逆的吸/放氫過程。在吸/放氫過程中，化學(xué)鍵發(fā)生微小的偏移，表明氫可能和OH基團發(fā)生反應(yīng)。隨著吸/放氫循環(huán)的增加以及比表面積的明顯的降低，多孔/中空TiO2坍塌。同時，隨著溫度的升高，化學(xué)吸附量增加，吸氫量升高

    Abstract:

    The hydrogen storage property of the porous/hollow TiO2 using yeast as template was investigated. It is demonstrated that crystalline TiO2 forms until the temperature reaches 620 °C. The product is composed of TiO2 and minor amount of H2Ti3O7 after heat treatment. The porous/hollow TiO2 with a specific surface area of 252.6 m2/g is obtained due to the removal of yeast. Pressure-composition isothermal (P-C-I) curve of TiO2 shows that a reversible hydriding/dehydridng process occurs at 30 °C, suggesting an obvious physisorption. The change of the chemical bond in Fourier-transform infrared (FT-IR) spectrum in hydriding/dehydridng indicates that hydrogen reacts with OH group on TiO2 surface even at 30 °C. The porous/hollow TiO2 collapses as cycles increase and the corresponding specific surface area decreases dramatically. Contrary, the hydrogen uptake increases with increasing of temperature, which is caused by chemisorption.

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趙忠義,陳慧苗,王 寧,柴玉俊. Hydrogen Storage Property of Porous/Hollow TiO2 Using Yeast as Template[J].稀有金屬材料與工程,2013,42(12):2467~2471.[Zhao Zhongyi, Chen Huimiao, Wang Ning, Chai Yujun. Hydrogen Storage Property of Porous/Hollow TiO2 Using Yeast as Template[J]. Rare Metal Materials and Engineering,2013,42(12):2467~2471.]
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  • 收稿日期:2012-12-21
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