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水熱法制備納米結(jié)構(gòu)TiO2的生長機(jī)制及表征
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Growth Mechanism and Characterization of Nano-Structured TiO2 Prepared by a Hydrothermal Method
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    摘要:

    將鈦片放入NaOH溶液中，用水熱法制備了TiO2納米線陣列薄膜。系統(tǒng)地研究了水熱參數(shù)對產(chǎn)物的影響以及納米結(jié)構(gòu)TiO2的生長機(jī)制。通過場發(fā)射掃描電子顯微鏡(FESEM)、X射線衍射儀(XRD)、透射電子顯微鏡(TEM)等對樣品進(jìn)行了表征。結(jié)果表明，水熱過程中，鈦溶解和鈦酸鹽結(jié)晶生長之間的動態(tài)平衡決定了產(chǎn)物的結(jié)構(gòu)和形貌。在相同溫度下，NaOH溶液濃度降低，水熱產(chǎn)物的維度就增加。溫度升高會促進(jìn)鈦溶解和鈦酸鹽擴(kuò)散，使產(chǎn)物在一維尺度上生長。同時(shí)高溫使晶體結(jié)構(gòu)更加完整。制備的TiO2納米線陳列顯示了良好的光電性能。

    Abstract:

    Ti foil was put into the NaOH solution and TiO2 nanowire array films were prepared by a hydrothermal method. The effects of hydrothermal parameters on the nano-structured TiO2 and its growth mechanism were systematically studied. The samples were characterized by FESEM, XRD and TEM. The results show that the dynamic equilibrium between the dissolution of Ti and crystal growth of titanate is the main influencing factor for structures and morphologies of the products. At the same temperature, the decreased concentration of the NaOH solution leads to the increased dimension of the hydrothermal products. The temperature rise can accelerate the dissolution of Ti and the diffusion of titanate, and the products grow along linear dimension. Meantime the high temperature makes more complete crystal structure. The prepared TiO2 nanowire array exhibits good optical and electrical properties.

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董 祥,陶 杰,李瑩瀅,汪 濤,朱 宏.水熱法制備納米結(jié)構(gòu)TiO2的生長機(jī)制及表征[J].稀有金屬材料與工程,2011,40(8):1478~1482.[Dong Xiang, Tao Jie, Li Yingying, Wang Tao, Zhu Hong. Growth Mechanism and Characterization of Nano-Structured TiO2 Prepared by a Hydrothermal Method[J]. Rare Metal Materials and Engineering,2011,40(8):1478~1482.]
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  • 收稿日期:2010-08-29
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