Hollow CuO-CeO2-ZrO2nano-particles were prepared with supercritical anti-solvent apparatus by using methanol as sol-vent and supercritical carbon dioxide as anti-solvent. Two key factors (i.e., pressure and temperature) were investigated to explore the effects of catalyst structure and physic-chemical properties (i.e., morphology, reducing property, oxygen storage capacity and specific surface area). The resulting materials were characterized with X-ray diffraction (XRD), high resolution transmission electron micros-copy (HRTEM), Brunauer-Emmett-Teller (BET),hydrogen temperature programmed reduction (H2-TPR) and oxygen storage capac-ity (OSC) measurement, respectively. The experimental results showed that lower temperatures promoted production of hollow struc-ture nano-particulates. The particle morphology also changed significantly, i.e. the solid construction was first transferred to hollow structure then back to solid construction. The optimal conditions for obtaining hollow nano-particles were determined at 45 °C, 18.0–24.0 MPa.
参考文献
| [1] | Huazhen Chang;Junhua Li;Xiaoyin Chen.Effect of Sn on MnO_x-CeO2 catalyst for SCR of NO_x by ammonia: Enhancement of activity and remarkable resistance to SO2[J].Catalysis Communications,2012:54-57. |
| [2] | Shin'ichi Matsumoto.Recent advances in automobile exhaust catalysts[J].Catalysis Today,20043/4(3/4):183-190. |
| [3] | 赵福真;龚渺;张广营;李金林.Effect of the loading content of CuO on the activity and structure of CuO/Ce-Mn-O catalysts for CO oxidation[J].稀土学报（英文版）,2015(6):604-610. |
| [4] | 祝星;杜云鹏;王华;魏永刚;李孔斋;孙令玥.Chemical interaction of Ce-Fe mixed oxides for methane selective oxidation[J].稀土学报（英文版）,2014(9):824-830. |
| [5] | Benjaram M. Reddy;Pankaj Bharali;Gode Thrimurthulu.Catalytic Efficiency of Ceria-Zirconia and Ceria-Hafnia Nanocomposite Oxides for Soot Oxidation[J].Catalysis Letters,20083/4(3/4):327-333. |
| [6] | Rui-tang Guo;Wen-long Zhen;Wei-guo Pan.Effect of Cu doping on the SCR activity of CeO2 catalyst prepared by citric acid method[J].Journal of industrial and engineering chemistry,20144(4):1577-1580. |
| [7] | Xin-Fa Dong;Han-Bo Zou;Wei-Ming Lin.Effect of preparation conditions of CuO-CeO_2-ZrO_2 catalyst on CO removal from hydrogen-rich gas[J].International journal of hydrogen energy,200615(15):2337-2344. |
| [8] | Jennifer Jung;Michel Perrut.Particle design using supercritical fluids: Literature and patent survey[J].The Journal of Supercritical Fluids,20013(3):179-219. |
| [9] | A. Erriguible;S. Laugier;M. Late.Effect of pressure and non-isothermal injection on re-crystallization by CO2 antisolvent: Solubility measurements, simulation of mixing and experiments[J].The Journal of Supercritical Fluids,2013:115-125. |
| [10] | Matthias Rossmann;Andreas Braeuer;Alfred Leipertz.Manipulating the size, the morphology and the polymorphism of acetaminophen using supercritical antisolvent (SAS) precipitation[J].The Journal of Supercritical Fluids,2013:230-237. |
| [11] | Dongyu Jiang;Minhua Zhang;Haoxi Jiang.Preparation and formation mechanism of nano-sized MnO_x-CeO_2 hollow spheres via a supercritical anti-solvent technique[J].Materials Letters,20118(8):1222-1225. |
| [12] | KUANG Li;HUANG Pan;SUN Huanhua;JIANG Haoxi;ZHANG Minhua.Preparation and characteristics of nano-crystalline Cu-Ce-Zr-O composite oxides via a green route: supercritical anti-solvent process[J].稀土学报（英文版）,2013(02):137-144. |
| [13] | Aymonier C;Loppinet-Serani A;Reveron H;Garrabos Y;Cansell F.Review of supercritical fluids in inorganic materials science[J].The Journal of Supercritical Fluids,20062(2):242-251. |
| [14] | Zi-Rong Tang;Jennifer K.Edwards;Jonathan K.Bartley.Nanocrystalline cerium oxide produced by supercritical antisolvent precipitation as a support for high-activity gold catalysts[J].Journal of Catalysis,20072(2):208-219. |
| [15] | Ernesto Reverchon;Iolanda De Marco;Enza Torino.Nanoparticles production by supercritical antisolvent precipitation:A general interpretation[J].The Journal of Supercritical Fluids,20071(1):126-138. |
| [16] | Martinez=Arias A..Comparative Study on Redox Properties and Catalytic Behavior for CO Oxidation of CuO/CeO_2 and CuO/ZrCeO_4 Catalysts[J].Journal of Catalysis,20001(1):207-216. |
| [17] | Dongyu Jiang;Minhua Zhang;Guiming Li.Preparation and evaluation of MnO_x-CeO2 nanospheres via a green route[J].Catalysis Communications,2012:59-63. |
| [18] | Dongyu Jiang;Minhua Zhang;Haoxi Jiang.Preparation and formation mechanism of nano-sized MnO_x-CeO_2 hollow spheres via a supercritical anti-solvent technique[J].Materials Letters,20118(8):1222-1225. |
| [19] | Joan Papavasiliou;George Avgouropoulos;Theophilos Ioannides.Production of hydrogen via combined steam reforming of methanol over CuO-CeO_2 catalysts[J].Catalysis Communications,20045(5):231-235. |
| [20] | Chaoquan Hu;Oingshan Zhu;Zheng Jiang.Nanosized CuO-Zr_xCe_(1-x)O_y aerogel catalysts prepared by ethanol supercritical drying for catalytic deep oxidation of benzene[J].Powder Technology: An International Journal on the Science and Technology of Wet and Dry Particulate Systems,20091/2(1/2):109-114. |
| [21] | Dukhin SS;Shen Y;Dave R;Pfeffer R.Droplet mass transfer, intradroplet nucleation and submicron particle production in two-phase flow of solvent-supercritical antisolvent emulsion[J].Colloids and Surfaces, A. Physicochemical and Engineering Aspects,20051/3(1/3):163-176. |
| [22] | Li D.;Yang GY.;Han BX.;Yan HK.;Liu ZM..Phase equilibria of CO2-PET-phenol system and generation of PET powders by supercritical CO2 anti-solvent[J].Polymer: The International Journal for the Science and Technology of Polymers,200015(15):5707-5712. |
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