| 三聚磷酸钠辅助水热合成制备氧化锌纳米片 |
| Preparation of ZnO Nanosheets via Sodium Tripolyphosphate Assisted Hydrothermal Synthesis |
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| 摘要: 以三聚磷酸钠为表面活性剂,采用水热合成法制备了氧化锌纳米片.采用场发射扫描电镜,透射电镜,紫外可见分光光度计和荧光光谱仪对氧化锌纳米片的显微结构和光学性能进行了表征,并对氧化锌纳米片的形成机理进行了探讨.结果表明:在220℃水热反应28h可得到尺寸大约为600nm×500nm×50nm(长×宽×高)结晶良好的六角形氧化锌纳米片,氧化锌纳米片对可见光的反射率超过90%,对紫外光的反射率小于20%,在395nm附近均存在较强的紫外发射峰.氧化锌纳米片的形成是由于氧化锌晶体的正极面{001}晶面上显露的OH-悬健部分被具有负电性的磷酸根取代,这种取代的发生,阻碍了溶液中的生长基元Zn(OH)42-在该晶面上叠合,使得本应生长最快的(001)晶面生长受限,所以得到了片状的纳米氧化锌. |
| 关键词: 氧化锌纳米片 水热合成 光学性能 |
| 基金项目: 江西省教育厅2006年度科技计划资助项目 |
| Abstract: ZnO nanosheets were synthesized via hydrothermal technique by using sodium tripolyphosphate as the surfactant.The microstructure and optical properties of ZnO nanosheets were characterized by means of FSEM, TEM,UV-Vis and fluorescence spectrophotometry.The growth mechanism of the ZnO nanosheets was also discussed.The results show that hexagonal ZnO nanosheets with about 600 nm×500 nm×50 nm are obtained at 220℃ for 28 h.The reflectivity of the as-prepared products at UV band and visible light band are less 20% and over 90%,respectively.Room temperature photoluminescence spectrum showed a strong UV band emission at 395 nm.Some negative P3O105- replace of OH- dangling bond on ZnO positive polar faces {001}.These replacement hinders splicing growth of Zn(OH)42- growth units along the [001] direction,resulting in the formation of zinc oxide nanosheets. |
| Keywords: ZnO nano-sheets hydrothermal synthesis optical properties |
| 投稿时间：2007-11-05 修订日期：2008-01-10 |
| 摘要点击次数: 1383 |
| 全文下载次数: 1913 |
| 王艳香,范学运,余熙.三聚磷酸钠辅助水热合成制备氧化锌纳米片[J].无机化学学报,2008,24(3):434-438. |
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