节点文献

纳米氧化锌的粒度控制与表征

Size Control and Characterization of ZnO Nanoparticles

  • 推荐 CAJ下载
  • PDF下载
  • 不支持迅雷等下载工具,请取消加速工具后下载。

【作者】 张士成李春和李星国

【Author】 Zhang Shi-Cheng Li Chun-He 1 Li Xing-Guo(State Key Laboratory of Rare Earth Ma terials Chemistry and Applications,Peking University,Beijing 100871;1 School of Materials Science and Tech nology,University of Science and Technology Beijing,Beijing 100083)

【机构】 北京大学稀土材料化学及应用国家重点实验室北京科技大学材料科学与工程学院北京大学稀土材料化学及应用国家重点实验室 北京100871北京100083北京100871

【摘要】 采用溶胶-凝胶法制备了粒度小于10nm的ZnO纳米颗粒,用沉淀法制备了粒度大于10nm的ZnO纳米颗粒.讨论了颗粒粒度的控制因素,得到不同粒度的产品.采用TEM、XRD、BET、UV-Vis等检测手段对不同粒度的ZnO纳米颗粒进行表征.结果表明:粒度小于10nm的ZnO纳米颗粒,具有量子效应,随粒度减小,紫外可见光光谱蓝移;粒度大于10nm的ZnO纳米颗粒,不具有量子效应,它们的禁带宽度与块体ZnO的禁带宽度相同,为3.2eV,不同粒度的ZnO纳米颗粒紫外可见光光谱相同.

【Abstract】 ZnO nanoparticles with different size were prepared by using sol-gel and precipitation method.With particle size of 10~50nm,they were p repared by using precipitation meth od,and particle size and size distri-bution were controlled by milling pr ocess of an intermediate product Zn 5 (CO 3 ) 2 (OH) 6 .With particle size smaller than 10nm,they were synthesized by u sing sol-gel method,and the size was adjusted by changing the reaction conditions,such as reaction temperature,reaction time,etc.The ZnO nanoparticles with different size were characterized by using TEM,XRD,BET,UV-Vis.From UV-Vis spectra,the qu antum effects of ZnO nanoparticles smaller than 10nm were found,i.e.,the absorption onset s howed blue-shifts with the decrease of size,and the ZnO nanoparticles bigger than 10nm did not show quantum effe cts,the absorption edge was about 387nm,corresponding to the bulk ban d gap for ZnO of 3.2eV.

【基金】 国家自然科学基金(20171002,20025103);中国石油科技中青年创新基金(2002CXKF-2);中国博士后科学基金资助项目~~
  • 【文献出处】 物理化学学报 ,Acta Physico-chimica Sinica , 编辑部邮箱 ,2004年S1期
  • 【分类号】TB383
  • 【被引频次】34
  • 【下载频次】721
节点文献中: 

本文链接的文献网络图示:

本文的引文网络