片状纳米结构CeO_2晶体的制备及其吸附CO_2性能（英文）
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摘要
在室温下,将CeCl_3溶液与CO_2储存材料(CO_2SM)混合、搅拌0.5 h制备了片状碳酸铈前驱体(CCPs),并在500℃下煅烧CCPs 4 h,制得平均尺寸为4.94μm×0.92μm,厚度为0.04～0.08μm纳米结构片状CeO_2晶体。在此过程中,CO_2SM不但可以提供CO_3~(2-),还能起到分散剂和结构导向剂的作用。反应过程中,系统地研究了CO_2SM用量、Ce~(3+)浓度和搅拌时间3个因素对CCPs形态和大小的影响,得到最优制备条件:0.1 g CO_2SM和50 mL 0.03 mol·L~(-1) Ce~(3+)水溶液以1 000 r·min~(-1)转速在室温下搅拌0.5h。煅烧CCPs后,所制备的片状CeO_2晶体在室温下CO_2吸附量可达0.554 mmol·g~(-1)。
Nano-structure flake-like CeO_2 crystals with an average size of 4.94 μm×0.92 μm(length and width)and the thickness of 0.04～0.08 μm were prepared by simply calcining cerium carbonate precursors(CCPs) at 500℃ for 4 h, in which the flake-like CCPs were firstly prepared by stirring CeCl_3 aqueous solution with CO_2-storage material(CO_2SM) for 0.5 h at room temperature. Interesting, the CO_2SM could provide CO_3~(2-)and act as dispersant and structure-directing agent for the preparation of flake-like CCPs. In the process, the effect of three factors,including CO_2SM dosage, Ce~(3+)concentration and stirring time, on the morphology and size of CCPs were systemically studied, and the optimum preparation conditions of flake-like CCPs were confirmed at 0.1 g CO_2SM with 50 mL 0.03 mol·L~(-1)Ce~(3+)aqueous solution at 1 000 r·min~(-1)for 0.5 h at room temperature. After calcining CCPs, the as-prepared flake-like CeO_2 crystals presented the CO_2 adsorption amount of 0.554 mmol·g~(-1)at room temperature.
Nano-structure flake-like CeO_2 crystals with an average size of 4.94 μm×0.92 μm(length and width)and the thickness of 0.04～0.08 μm were prepared by simply calcining cerium carbonate precursors(CCPs) at 500℃ for 4 h, in which the flake-like CCPs were firstly prepared by stirring CeCl_3 aqueous solution with CO_2-storage material(CO_2SM) for 0.5 h at room temperature. Interesting, the CO_2SM could provide CO_3~(2-)and act as dispersant and structure-directing agent for the preparation of flake-like CCPs. In the process, the effect of three factors,including CO_2SM dosage, Ce~(3+)concentration and stirring time, on the morphology and size of CCPs were systemically studied, and the optimum preparation conditions of flake-like CCPs were confirmed at 0.1 g CO_2SM with 50 mL 0.03 mol·L~(-1)Ce~(3+)aqueous solution at 1 000 r·min~(-1)for 0.5 h at room temperature. After calcining CCPs, the as-prepared flake-like CeO_2 crystals presented the CO_2 adsorption amount of 0.554 mmol·g~(-1)at room temperature.
引文
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[14]Chaikittisilp W, Khunsupat R, Chen T T, et al. Ind. Eng.Chem. Res., 2011,50:14203-14210
[15]Chaikittisilp W, Kim H, Jones C W. Energy Fuels, 2011,25:5528-5537
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[21]Shang J, Li G, Singh R, et al. J. Am. Chem. Soc., 2012,134:19246-19253
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[24]Kamimura Y, Shimomura M, Endo A. J. Colloid Interface Sci., 2014,436:52-62
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[26]Binet C, Daturi M, Lavalley J. Catal. Today, 1999,50:207-225
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