无机材料学报 ›› 2012, Vol. 27 ›› Issue (9): 1003-1008.DOI: 10.3724/SP.J.1077.2012.12188 CSTR: 32189.14.SP.J.1077.2012.12188

• 研究快报 • 上一篇    

一步水热模板法制备Cu-TiO2异质结构纳米粒子  

赵鹏君1,2, 吴 荣1, 侯 娟1,2, 常爱民1, 关 芳1,2, 张 博1,2   

  1. (1. 中国科学院 新疆理化技术研究所, 新疆电子信息材料与器件重点实验室, 乌鲁木齐 830011; 2. 中国科学院 研究生院, 北京 100049)
  • 收稿日期:2012-03-27 修回日期:2012-05-11 出版日期:2012-09-20 网络出版日期:2012-08-28
  • 作者简介:ZHAO Peng-Jun (1986–), male, candidate of master degree. E-mail: zhaopengjun110@163.com
  • 基金资助:

    “Western Light Joint Scholar Foundation” Program of Chinese Academy of Sciences( LHXZ200902); China Postdoctoral Science Foundation(20100471679, 201104704)

One-step Self Assemble of Cu-TiO2 Heterogeneous Nanoparticles Using a Soft Template

ZHAO Peng-Jun1,2, WU Rong1, HOU Juan1,2, CHANG Ai-Min1, GUAN Fang1,2, ZHANG Bo1,2   

  1. (1. Xinjiang Key Laboratory of Electronic Information Materials and Devices, Xinjiang Technical Institute of Physics & Chemistry, Chinese Academy of Sciences, Urumqi 830011, China; 2. Graduate University of Chinese Academy of Sciences, Beijing 100049, China)
  • Received:2012-03-27 Revised:2012-05-11 Published:2012-09-20 Online:2012-08-28
  • About author:ZHAO Peng-Jun (1986–), male, candidate of master degree. E-mail: zhaopengjun110@163.com
  • Supported by:

    “Western Light Joint Scholar Foundation” Program of Chinese Academy of Sciences( LHXZ200902); China Postdoctoral Science Foundation(20100471679, 201104704)

摘要: 以聚乙二醇(PEG)为软模板剂, 采用一步水热法合成了具有异质结构的铜–二氧化钛复合纳米粒子. 利用X射线衍射谱(XRD)、透射电子显微镜(TEM)等分别对制备材料的相组成、微观结构进行了研究. 结果表明, 一步水热法制备的异质纳米粒子由单一立方相铜和锐钛矿相二氧化钛组成. 高分辨透射电子显微镜(HRTEM)在单一粒子中观测到清晰的铜(101)和二氧化钛(111)晶面构成的界面. 该界面有助于二氧化钛光生电子–空穴对的分离. 同时, 所制备纳米粒子的颗粒尺寸和光吸收特性可以通过改变PEG分子链长进行微调. 本研究还对水热过程的反应机理进行了讨论, 结果表明: PEG与铜氨络合物通过氢键连接, 其链长对于粒子尺寸的影响在于PEG对Cu颗粒的尺寸进行的调节, 而此过程中二氧化钛的晶粒尺寸并无明显变化. 紫外–可见吸收光谱表明该异质纳米粒子与普通二氧化钛纳米粉体相比, 对可见光区光谱有较为强烈的吸收. 该界面纳米材料是一种有潜在应用价值的光催化材料和太阳能电池材料.

关键词: Cu-TiO2, PEG, 异质结构, 水热, 可见光吸收

Abstract: Cu-TiO2 heterostructure nanoparticles were successfully synthesized via a novel one-step self-assemble hydrothermal method using polyethylene glycol as the soft template. The nanospheres were characterized in light of the chemical composition and morphology using X-ray diffraction (XRD) and transmission electron microscope (TEM), respectively. The products are composed of cubic copper and anatase TiO2. Interfaces between Cu (101) and TiO2 (111) were observed by HRTEM. In addition, the nanoparticles size could be controlled by adjusting the polymerization degrees of PEG. The accommodations of the particle sizes were mainly caused by Cu nanospheres rather than TiO2. A possible synthetic mechanism which interprets the formation of Cu-TiO2 heterogeneous nanoparticles could be ascribed to the hydrogen bonds between Cu(NH3)2+ and PEG. UV-Vis absorption spectra indicated that the prepared product has strong absorbency in the visible region. Therefore, the unique interface nanomaterial could be used as a potential class of the materials platform as visible-light-driven photocatalyst and electrode on enhancing the photoelectric properties of solar cells.

Key words: Cu-TiO2, PEG, heterogeneous, hydrothermal method, visible-light absorption

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