發(fā)布時間：2018-06-06 14:46

  本文選題：石墨烯 + 氧化鋅納米棒　； 參考：《東南大學》2015年碩士論文

【摘要】：石墨烯由于其高比表面積、優(yōu)異的導電性和機械性能等特點成為近年研究的熱點,由此產生的石墨烯基金屬氧化物(二氧化鈦、氧化鋅、二氧化錳、氧化鎳等)納米復合結構由于其在催化降解、超級電容器和傳感等方面具有巨大的潛在應用受到了廣泛關注。本文采用化學氣相沉積法在銅箔上制備石墨烯薄膜,在泡沫鎳基體上制備三維石墨烯。采用水熱法制備氧化鋅納米棒,得到了高度有序生長和結晶性好的氧化鋅納米棒,在此基礎上,采用原位結晶法制備石墨烯／氧化鋅納米棒復合結構。通過SEM、TEM、 Raman等手段表征三維石墨烯。并研究不同生長時間的氧化鋅納米棒的紫外-可見光吸收特性、光致發(fā)光性及疏水性質,從而確定了水熱法制備氧化鋅納米棒的最優(yōu)參數(shù),在選定的水熱法制備氧化鋅納米棒的最優(yōu)參數(shù)的基礎上,研究不同的生長液的濃度對三維石墨烯/氧化鋅納米棒復合結構形貌及電化學性能的影響。主要結果如下：采用常壓化學氣相沉積法制備石墨烯,在生長時間為10 mins,冷卻速率為20℃/mmins條件下系統(tǒng)探討了影響石墨烯薄膜的主要參數(shù)甲烷氫氣比,優(yōu)化出了制備石墨烯薄膜的最佳工藝參數(shù)：甲烷氫氣比=2 sccm:20 sccm。采用常壓化學氣相沉積法制備三維石墨烯,以泡沫鎳為模板,在泡沫鎳表面生長石墨烯,通過濕化學轉移得到結構完整的三維石墨烯,且為連續(xù)的三維網絡結構,孔徑大小為400μm左右。采用水熱法生長ZnO納米棒,直徑達50 nm,長度為530 nm左右。研究不同生長時間對氧化鋅納米棒的光致發(fā)光、紫外-可見光吸收特性及其親疏水性。得到高度有序生長的氧化鋅納米棒,且結晶性良好。以三維石墨烯作為基體,采用原位結晶法在三維石墨烯表面水熱法生長ZnO納米棒,對得到的復合結構進行電化學測試。Zn2+濃度為0.025M配置的生長液制備的復合結構作為電極對H202的探測限為10μm,且線性探測范圍為10 gM至160 μM,線性相關系數(shù)達0.99966,電流響應時間為3s,較相應單一的三維石墨烯性能有大幅度提高,有望應用于電化學傳感器等領域。
[Abstract]:Because of its high specific surface area, excellent electrical conductivity and mechanical properties, graphene has become a hot spot in recent years, resulting in graphene based metal oxides (titanium dioxide, zinc oxide, manganese dioxide, etc.) Due to its potential applications in catalytic degradation, supercapacitors and sensing, nickel oxide nanocomposites have attracted wide attention. In this paper, graphene thin films were prepared on copper foil by chemical vapor deposition, and three dimensional graphene was prepared on nickel foam substrate. Zinc oxide nanorods were prepared by hydrothermal method, and ZnO nanorods with high order growth and good crystallinity were obtained. On this basis, graphene / zinc oxide nanorods were prepared by in situ crystallization method. Three dimensional graphene was characterized by means of SEM-TEM, Raman and so on. The UV-Vis absorption characteristics, photoluminescence and hydrophobic properties of ZnO nanorods at different growth times were studied, and the optimum parameters for the preparation of ZnO nanorods by hydrothermal method were determined. On the basis of the optimum parameters for the preparation of ZnO nanorods by hydrothermal method, the effects of different concentration of growth solution on the morphology and electrochemical properties of 3D graphene / zinc oxide nanorods were studied. The main results are as follows: under the condition of 10 mins growth time and 20 鈩，

本文編號：1987004