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首页> 外文期刊>Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology >Preparation of titanium dioxide in the nano-spaces of activated carbon using carbon dioxide supercritical fluid as a solvent
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Preparation of titanium dioxide in the nano-spaces of activated carbon using carbon dioxide supercritical fluid as a solvent

机译：以二氧化碳超临界流体为溶剂在活性炭纳米空间中制备二氧化钛

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摘要

The penetration of titanium tetraisopropoxide (TTIP) dissolved in supercritical CO_2 into the nano-spaces of activated carbon was studied in terms of coating TiO_2 on a carbon surface.The amount of TiO_2,which was derived from TTIP through thermal decomposition,depended on the density of the solvent and the content of an entrainer,2-propanol (IPA),in the CO_2.In the system without the entrainer,the amount of TiO_2 in the activated carbon pores increased with 'the solvent density.The addition of the entrainer to the solvent fluid also influenced the TTIP adsorption level.The molar fraction of CO_2 in the solvent (X_(CO2)) should be more than 0.9 at 393 K for the penetration of TTIP,above which only the supercritical phase existed in the system without any other liquid phases.These results suggested that a supercritical fluid is useful,and that control of the solvent content,density and treatment time should be important for the preparation of activated carbon/metal oxide composites.
机译：研究了超临界CO_2中溶解的四异丙醇钛（TTIP）在活性炭纳米空间中的渗透情况。通过热分解由TTIP获得的TiO_2的量取决于密度CO_2中溶剂和夹带剂2-丙醇（IPA）的含量。在没有夹带剂的系统中，活性炭孔中TiO_2的含量随溶剂密度的增加而增加。 TTIP的渗透在393 K时，溶剂中的CO_2（X_（CO2））的摩尔分数（X_（CO2））大于0.9，且在系统中仅存在超临界相而没有任何这些结果表明，超临界流体是有用的，并且溶剂含量，密度和处理时间的控制对于制备活性炭/金属氧化物复合材料应该是重要的。

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