水热法制备ZnO纳米棒薄膜及其机理  

The Growth Mechanism of Ultra Long ZnO Nanorod Arry Films by Using PEI Assisted Hydrothermal Method

作　　者：刘宽菲[1] 武卫兵[1] 陈晓东[1] 陈宝龙[1] 张楠楠[1] 

机构地区：[1]济南大学材料科学与工程学院,山东济南250022

出　　处：《济南大学学报（自然科学版）》2013年第4期363-368,共6页Journal of University of Jinan(Science and Technology)

基　　金：山东省自然科学基金(ZR2010EZ003)

摘　　要：采用连续水热法在Zn(NO3)2-HMT-PEI体系的前驱体溶液中,成功合成20μm长的ZnO纳米棒薄膜;分析生长溶液变色及ZnO纳米棒生长机理。结果表明:六次甲基四胺(HMT)高温分解出的甲醛(HCHO),能与聚乙烯亚胺(PEI)发生Mannich反应生成席夫碱化合物是溶液由无色变为红色的原因;该反应使得PEI分子中具有强络合能力伯胺(—NH2)转变为弱络合能力的亚胺(C N),迫使原被PEI稳定螯合的Zn2+重新释放,是水热法生长ZnO纳米棒的关键。Well-aligned ZnO nanorod arrays with a long length of more than 20 μm were prepared successfully in a zinc nitrate-hexamethylenetetramine-polyethylenimine aqueous solution at low temperatures.We found that the color change of the ZnO growth solution came out of the Mannich reaction between formaldehyde(HCHO),the decomposition products of hexamethylenetetramine(HMT),and polyethylenimine(PEI).And the key aspect for the continuous growth of ZnO nanorod arrays is that reaction could destroy the PEI-NH2-Zn2+ chelate compound to set Zn2+ ions free.Then the free Zn2+ would react with OH-to form ZnO nanorods.

关 键 词：染料敏化太阳能电池 量子点敏化太阳能电池 ZNO纳米棒 聚乙烯亚胺 亚胺 

分 类 号：O614.241[理学—无机化学] TB383.2[理学—化学]