Oriented CuZnAl Ternary Layered Double Hydroxide Films: In situ Hydrothermal Growth and Anticorrosion Properties

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• 作者：Xiaodong Lei ; Linna Wang ; Xuhui Zhao ; Zheng Chang ; Meihong Jiang ; Dongpeng Yan ; Xiaoming Sun
• 刊名：Industrial & Engineering Chemistry Research
• 出版年：2013
• 出版时间：December 18, 2013
• 年：2013
• 卷：52
• 期：50
• 页码：17934-17940
• 全文大小：333K
• 年卷期：v.52,no.50(December 18, 2013)
• ISSN：1520-5045

文摘

Oriented dense thin films of CuZnAl鈥揘O₃ layered double hydroxide (CuZnAl鈥揘O₃ LDH) have been grown on the surface of copper foil by an in situ hydrothermal method with Cu substrate as Cu source, boehmite sol as Al source, and Zn(NO₃)₂ aqueous solution as Zn source. The structure and morphology of the as-prepared CuZnAl鈥揘O₃ LDH films were studied by X-ray diffraction, elemental analysis, room temperature Fourier transform infrared spectra, and scanning electron microscopy analysis. The results showed that the [00l] direction (or ab plane) of CuZnAl鈥揘O₃ LDH platelets was parallel to the surface of the Cu substrate. By a facial immersion method, intercalation of laurate anions by ion exchange with the CuZnAl鈥揘O₃ LDH film precursors endowed hydrophobic properties on Cu substrate. Moreover, the corrosion behavior of the hydrophobic laurate intercalated LDH films was then investigated by detecting the contact angle, potentiodynamic polarization, and electrochemical impedance properties, which showed that the corrosion resistance of the pristine Cu was highly improved due to the 鈥渉ydrophobic interaction鈥?and 鈥渁nion exchange鈥?effects. Therefore, this work provides an effective way to develop a new type of ternary LDH films with potential application as hydrophobic and long-term anticorrosive materials.