透過您的圖書館登入
IP:3.235.243.45
  • 學位論文

低溫水熱法合成氧化鋅奈米結構於可撓性基板上之成長與特性研究

The Growth and Properties of ZnO Nanostructures on Flexible Substrates Using Hydrothermal Method

指導教授 : 呂明諺
若您是本文的作者,可授權文章由華藝線上圖書館中協助推廣。

摘要


本實驗旨在探討氧化鋅奈米結構在可撓性基板上的成長並開發其應用,共分為兩個部分。 第一部分為利用低溫水熱法成長氧化鋅奈米結構於UV光處理過後的石墨烯基板上,首先將石墨烯轉印到矽晶片上,接著以不同的UV光照射時間進行石墨烯基板表面處理,由接觸角及片電阻量測結果知石墨烯基板經過UV光照射後會變得較為親水而片電阻也會因為不同的照射時間而有所變化,於照射10分鐘處理的條件可達最低片電阻值。對於成長氧化鋅於不同UV光處理時間的石墨烯上也呈現不一樣的變化,在UV光照射10分鐘的石墨烯基板上所成長的氧化鋅奈米線的密度與均勻性可達最佳化。穿透式掃描電子顯微鏡可以觀察到氧化鋅奈米線確實於石墨烯表面成長。氧化鋅於石墨烯上成長的差異推測是與石墨烯在UV光處理後產生的缺陷多寡有關,可由拉曼光譜的量測結果得知。從實驗可知在10分鐘的UV光照射後的石墨烯會有最低的片電阻且能成長出高密度均勻的氧化鋅奈米線。第二部分我們使用兩階段的成長方式將氧化鋅奈米線陣列均勻成長於紙上,兩階段成長包含:氧化鋅奈米粒子的合成和水熱法氧化奈米線成長。將適當濃度的醋酸鋅和不同容量的氫氧化鈉混合溶液在溫度60度進行反應可得到平均約為4 nm的氧化鋅奈米粒子,由吸收光譜結果可知合成的氧化鋅奈米粒子會隨加入的氫氧化鈉的量而不同。之後以合成的氧化鋅奈米粒子塗佈於紙上進行水熱法成長,由掃描式電子顯微鏡結果可知氧化鋅奈米線陣列可均勻成長在紙上。而後將長滿均勻氧化鋅奈米線陣列的紙張進行染料降解的光催化量測,也針對不同入射角的UV光進行光催化量測,結果顯示入射角會影響到光催化的特性,以垂直入射的特性最佳。

關鍵字

可撓性 氧化鋅 水熱法

並列摘要


In the present study, we conducted two related topics on the growth and properties of ZnO nanostructures on flexible substrates using hydrothermal method. In the first topic, the effects of UV light illuminations to the properties of graphene and the growth of ZnO on graphene substrates are discussed. First, the graphene was transferred onto the Si substrate, and was exposed under the UV light for different durations, then. After the seeding using the spin coater, the graphene was used as the growth substrate for hydrothermal growth of ZnO nanowires. The scanning electron microscopy results show the nanowire densities are varies with different UV exposure time and Transmission Electron Microscopy image of ZnO nanowires grown on graphene, revealed that the ZnO nanowires preferentially grew vertically along the c-axis. The variation of ZnO nanowire density can be attributed to the variations of the hydrophobicity and the defect density of graphene after UV treatments. Contact angle measurements, Raman Spectroscopy, were used to clarify the role of UV exposure plays on the nanowire growth. In the second part of this study, we implanted two-step growth strategy to grow ZnO nanowire arrays on paper substrates uniformly.We successfully grown ZnO nanowire arrays on paper surface through a two-step growth process. The process growth involved including synthesizing synthesis of ZnO nanoparticles and hydrothermal growth of ZnO nanowire arrays on paper substrates. The incident-angle photocatalytic activities of ZnO nanowires arrays on paper were carried out. The photocatalytic activity of samples was examined by the degradation of methylene blue (MB) solution. The results revealed that the photocatalytic activities of samples show the great dependence to UV light incident-angle.

並列關鍵字

ZnO Hydrothermal Method Flexible

參考文獻


(18) Hsieh, Y. P.; Wang, Y. W.; Ting, C. C.; Wang, H. C.; Chen, K. Y.; Yang, C. C.: Effect of Catalyst Morphology on the Quality of CVD Grown Graphene. J Nanomater 2013, 2013, 393724 .
(1) Yang, Y.; Guo, W. X.; Pradel, K. C.; Zhu, G.; Zhou, Y. S.; Zhang, Y.; Hu, Y. F.; Lin, L.; Wang, Z. L.: Pyroelectric Nanogenerators for Harvesting Thermoelectric Energy. Nano Lett 2012, 12, 2833-2838.
(2) Wang, Z. L.: ZnO nanowire and nanobelt platform for nanotechnology. Mat Sci Eng R 2009, 64, 33-71.
(3) Wang, Z. L.: Nanostructures of zinc oxide. Mater Today 2004, 7, 26-33.
(4) Kwon, B. J.; Lee, K. M.; Shin, H. Y.; Kim, J.; Liu, J.; Yoon, S.; Lee, S.; Ahn, Y. H.; Park, J. Y.: Synthesis of vertical arrays of ultra long ZnO nanowires on noncrystalline substrates. Mater Sci Eng B-Adv 2012, 177, 132-139.

延伸閱讀