采用沉淀法制备了球形CeO2纳米粒子,将其作为核粒子溶液,然后向其中滴加四氯合金酸溶液,在CeO2胶体表面利用柠檬酸钠还原[AuCl4]-离子,得到了CeO2@Au核壳结构纳米粒子.TEM分析表明,CeO2纳米粒子分散效果好,粒径为5 nm;CeCl2@Au核壳粒子为球形,无团聚,平均粒径为15 nm.XRD分析表明,CeO2@Au核壳粒子为晶型结构,属于立方晶系,CeO2空间群为O5H-FM3M,Au的空间群为Fm-3m.UV-vis分析发现,CeO2@Au核壳粒子在300和520 nm处呈现出两个比较强的吸收峰,分别对应于CeO2胶体溶液的吸收峰和金粒子的表面等离子共振吸收峰.EDS分析了核壳结构CeO2@Au纳米粒子中存在Ce,O和Au 3种元素.XPS分析表明,Ce3d3/2和Au4f电子结合能与标准结合能相比发生了变化,说明CeO2与Au之间存在着相互作用.
参考文献
| [1] | Clement Sanchez;Benedicte Lebeau;Frederic Chaput;Jean-Pierre Boilot .Optical Properties of Functional Hybrid Organic-Inorganic Nanocomposites[J].Advanced Materials,2003(23):1969-1994. |
| [2] | Sanchez C;Julian B;Belleville P;Popall M .Applications of hybrid organic-inorganic nanocomposites[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2005(35/36):3559-3592. |
| [3] | M.Yu;J.Lin;J.Fang .Silica Spheres Coated with YVO_4:Eu~(3+) Layers via Sol-Gel Process:A Simple Method To Obtain Spherical Core-Shell Phosphors[J].Chemistry of Materials,2005(7):1783-1791. |
| [4] | Wang H;Lin C K;Liu X M;Lin J Yu M .Manodisperse spherical core-shell-structured phosphors obtained by functionalization of silica spheres with Y2O3:Eu3+ layers for field emission displays[J].Applied Physics Letters,2005,87(18):181907. |
| [5] | Yu M;Wang H;Lin CK;Li GZ;Lin J .Sol-gel synthesis and photoluminescence properties of spherical SiO2@LaPO4 : Ce3+/Tb3+ particles with a core-shell structure[J].Nanotechnology,2006(13):3245-3252. |
| [6] | Jia P Y;Liu X M;Li G Z;Yu M Fang J Lin J .Sol-gel synthesis and characterization of SiO2 @ CaWO4,SiO2 @ CaWO4:Eu3+/Tb3+ core-shell structured spherical particles[J].Nanotechnology,2006,17(03):734. |
| [7] | Lin CK;Wang H;Kong DY;Yu M;Liu XM;Wang ZL;Lin J .Silica supported submicron SiO2@Y2SiO5 : Eu3+ and SiO2@Y2SiO5 : Ce3+/Tb3+ spherical particles with a core-shell structure: Sol-gel synthesis and characterization[J].European journal of inorganic chemistry,2006(18):3667-3675. |
| [8] | Liu X M;Jia P Y;Lin J .Monodisperse spherical core-shell structured SiO2-CaTiO2:Pr3+ phosphors for field emission displays[J].Journal of Applied Physics,2006,99:124902. |
| [9] | Jia PY;Liu XM;Yu M;Luo Y;Fang J;Lin J .Luminescence properties of sol-gel derived spherical SiO2@Gd-2(WO4)(3): Eu3+ particles with core-shell structure[J].Chemical Physics Letters,2006(4-6):358-363. |
| [10] | Wang H;Yu M;Lin CK;Lin J .Core-shell structured SiO2@YVO4 : Dy3+/Sm3+ phosphor particles: Sol-gel preparation and characterization[J].Journal of Colloid and Interface Science,2006(1):176-182. |
| [11] | Li GZ;Wang ZL;Quan ZW;Liu XM;Yu M;Wang RS;Lin J .Sol-gel growth of Gd2MoO6 : Eu3+ nanocrystalline layers on SiO2 spheres (SiO2@Gd2MoO6 : Eu3+) and their luminescent properties[J].Surface Science: A Journal Devoted to the Physics and Chemistry of Interfaces,2006(16):3321-3326. |
| [12] | Lin CK;Li YY;Yu M;Yang PP;Lin J .A facile synthesis and characterization of monodisperse spherical pigment particles with a core/shell structnre[J].Advanced functional materials,2007(9):1459-1465. |
| [13] | Yufang Zhu;Jianlin Shi;Weihua Shen;Xiaoping Dong;Jingwei Feng;Meilin Ruan;Yongsheng Li .Stimuli-Responsive Controlled Drug Release from a Hollow Mesoporous Silica Sphere/Polyelectrolyte Multilayer Core-Shell Structure[J].Angewandte Chemie,2005(32):5083-5087. |
| [14] | Zhihui Ban;Yuri A.Barnakov;Feng Li;Vladimir O.Golub;Charles J.O'Connor .The synthesis of core-shell iron@gold nanoparticles and their characterization[J].Journal of Materials Chemistry: An Interdisciplinary Journal dealing with Synthesis, Structures, Properties and Applications of Materials, Particulary Those Associated with Advanced Technology,2005(43):4660-4662. |
| [15] | Ramjee Balasubramanian;Kwon Young-Gil;Wei Alexander .Encapsulation and funetionalization of nanoparticles in crosslinked resorcinarene shells[J].Journal of Materials Chemistry,2007,17(01):105. |
| [16] | Chen Huai-Chung;Lee Sheng-Wei;Chen Lih-Juann .Selfaligned nanolenses with multilayered Ge/SiO2 core/shall structures on Si(001)[J].Advanced Materials,2007,19(02):222. |
| [17] | Xiaoming Sun;Junfeng Liu;Yadong Li .Use of Carbonaceous Polysaccharide Microspheres as Templates for Fabricating Metal Oxide Hollow Spheres[J].Chemistry: A European journal,2006(7):2039-2047. |
| [18] | Fu Q;Deng WL;Saltsburg H;Flytzani-Stephanopoulos M .Activity and stability of low-content gold-cerium oxide catalysts for the water-gas shift reaction[J].Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications,2005(1/2):57-68. |
| [19] | Qi Fu;Adam Weber;Maria Flytzani-Stephanopoulos .Nanostructured Au-CeO_2 catalysts for low-temperature water-gas shift[J].Catalysis Letters,2001(1/3):87-95. |
| [20] | Fu Q.;Saltsburg H.;Flytzani-Stephanopoulos M. .Active nonmetallic Au and Pt species on ceria-based water-gas shift catalysts[J].Science,2003(5635):935-938. |
| [21] | Andreeva D.;Nedyalkova R.;Ilieva L.;Abrashev MV. .Nanosize gold-ceria catalysts promoted by vanadia for complete benzene oxidation[J].Applied Catalysis, A. General: An International Journal Devoted to Catalytic Science and Its Applications,2003(1):29-38. |
| [22] | Tabakova T;Boccuzzi F;Manzoli M;Andreeva D .FTIR study of low-temperature water-gas shift reaction on gold/eeria catalyst[J].Applied Catalysis A:General,2003,252(02):385. |
| [23] | Huang P X;Wu F;Zhu B L;Gao X P Zhu H Y Yan T Y Huang W P Wu S H Song D Y .CeO2 nanorods and gold nanocrystals supported on CeO2 nanerods as catalyst[J].Journal of Physical Chemistry B,2005,109(41):19169. |
| [24] | Jin-Seok Lee;Sung-Churl Choi .Crystallization behavior of nano-ceria powders by hydrothermal synthesis using a mixture of H2O2 and NH4OH[J].Materials Letters,2004,58(3-4):390. |
| [25] | Fan Guodong;Feng Changgen;Zhang Zhao .Surface and Texture Properties of Tb-Doped Ceria-Zirconia Solid Solution Prepared by Sol-Gel Method[J].Journal of Rare Earths,2007(1):42-47. |
| [26] | Link Stephan;El-Sayed Mostafa A. .Size and temperature dependence of the plasmon absorption of colloidal gold nanoparticles[J].The journal of physical chemistry, B. Condensed matter, materials, surfaces, interfaces & biophysical,1999(21):4212-4217. |
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