物理化学学报 >> 2013, Vol. 29 >> Issue (04): 874-880.doi: 10.3866/PKU.WHXB201302045

材料物理化学 上一篇    下一篇

碱式硫酸锌转化法制备ZnO多孔片及其光致发光性能

何朋1,2, 高相东1, 吴历斌3, 蒋正武4, 王彩露1,2, 李效民1   

  1. 1 中国科学院上海硅酸盐研究所,高性能陶瓷和超微结构国家重点实验室, 上海 200050;
    2 中国科学院大学, 北京 100049;
    3 上海石化技术研究所, 上海 200137;
    4 同济大学先进土木工程材料教育部重点实验室, 上海 201804
  • 收稿日期:2012-11-07 修回日期:2013-02-04 发布日期:2013-03-25
  • 通讯作者: 高相东 E-mail:xdgao@mail.sic.ac.cn
  • 基金资助:

    国家重点基础研究发展规划(973) (2009CB623304, 2011CB013805)和国家自然科学基金(51072214, 51002174)资助项目

Porous ZnO Sheets Transformed from Zinc Sulfate Hydroxide Hydrate and Their Photoluminescence Performance

HE Peng1,2, GAO Xiang-Dong1, WU Li-Bin3, JIANG Zheng-Wu4, WANG Cai-Lu1,2, LI Xiao-Min1   

  1. 1 State Key Laboratory of High Performance Ceramics and Superfine Microstructures, Shanghai Institute of Ceramics, Chinese Academy of Sciences, Shanghai 200050, P. R. China;
    2 University of Chinese Academy of Sciences, Beijing 100049, P. R. China;
    3 Shanghai Research Institute of Petrochemical Technology, Shanghai 200137, P. R. China;
    4 Key Laboratory of Advanced Civil Engineering Materials of Ministry of Education, Tongji University, Shanghai 201804, P. R. China
  • Received:2012-11-07 Revised:2013-02-04 Published:2013-03-25
  • Supported by:

    The project was supported by the National Key Basic Research Program of China (973) (2009CB623304, 2011CB013805) and National Natural Science Foundation of China (51072214, 51002174).

摘要:

采用化学浴沉积法制备了碱式硫酸锌(ZSH)纳米片, 并经1000 ℃煅烧处理得到了ZnO多孔片. 详细研究了ZSH在Zn2+-六亚甲基四胺前驱体溶液体系中的形成机理、ZSH 的热解过程、ZnO的结晶性、微结构以及光致发光性能. 结果表明, 所得ZnO多孔片呈规则六角形状, 其尺寸为10-50 μm, 厚度为200-500 nm, 由于高温固相反应中传质等因素的限制, 构成薄片的ZnO晶粒呈多边形或不规则形貌, 晶粒间的孔为亚微米孔, 尺寸在100-500 nm范围. ZnO多孔薄片结晶性良好, 在388 nm处表现出较强紫外发光, 无可见光区的缺陷发光. 机理分析表明, SO42- 与Zn2+的高亲和力是Zn2+-六亚甲基四胺体系中ZSH生成的根本原因, 而ZSH的热分解过程对ZnO多孔片的形貌和微结构影响显著. 本研究提出了一种制备高结晶质量ZnO多孔材料的新方法, 所得ZnO多孔片可望在催化、染料敏化太阳能电池、紫外光电器件等领域得到应用.

关键词: ZnO, 多孔片, 碱式硫酸锌, 光致发光

Abstract:

Highly crystalline, porous ZnO sheets were prepared from chemically-deposited zinc sulfate hydroxide hydrate (ZSH) sheets by sintering at 1000 ℃. The formation mechanism of ZSH in Zn2+- hexamethyltetramine (HMT) precursor system, the transformation process of ZSH to ZnO, and the crystalline, microstructural and optical properties of the ZnO sheets were investigated. The porous ZnO sheets possessed a well-defined hexagonal shape with controllable size (10-50 μm) and thickness (200-500 nm), high crystallinity, and strong ultraviolet photoluminescence without detectable defectrelated visible emission. Submicron-sized pores (100-500 nm) and polygonal or irregular ZnO particles resulting from the limited mass transport during high temperature sintering were observed in the ZnO sheets. Analysis of the formation mechanism indicated that the high affinity of SO42- for Zn2+ was responsible for the formation of ZSH in the Zn2+-HMT precursor system, and the thermolysis of ZSH affected the morphology and microstructure of the ZnO sheets. This work reveals a facile route to porous ZnO nanostructures with good crystallinity and optical properties, which make them suitable for application in catalysis, and photo and/or electrical devices.

Key words: ZnO, Porous sheet, Zinc sulfate hydroxide hydrate, Photoluminescence

MSC2000: 

  • O649