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水溶液中自組裝膜對(duì)銀的緩蝕作用及吸附機(jī)理分析
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江蘇高校優(yōu)勢(shì)學(xué)科建設(shè)工程資助項(xiàng)目；江蘇省2011年度普通高校研究生科研創(chuàng)新計(jì)劃項(xiàng)目 (CXLX11_0359)


Anticorrosion Action and Adsorption Mechanism of the Self-Assemble Monolayers
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    摘要:

    采用不同的分散劑將十八烷基硫醇 (ODT)分散在水溶液中，并以其在銀表面制備了自組裝膜 (SAMs)。用極化曲線、交流阻抗、循環(huán)伏安等電化學(xué)方法研究了ODT SAMs對(duì)銀的緩蝕作用及吸附行為。結(jié)果表明：ODT分子能夠在銀表面形成穩(wěn)定、致密的SAMs，有效抑制了銀的陰極氧去極化過程和陽極硫化過程，改變了電極表面的雙電層結(jié)構(gòu)，對(duì)銀有良好的緩蝕作用。ODT在銀表面的吸附行為符合Langmuir吸附等溫式，吸附機(jī)理是典型的化學(xué)吸附

    Abstract:

    The odtadecanethiol (ODT) was dispersed in aqueous solution with different surfactants, and then self-assembled monilayers (SAMs) were prepared on the surface of silver. The anticorrosion function and adsorption behavior of ODT SAMs on the silve surface was investigated by means of polarization curve, AC impedance and circular voltammetric methods. The results show that ODT is easy to form dense and stable SAMs on the surface of silver. It effectively suppresses silver anodic oxidation process and cathodic reduction process, and changes the surface electric double layer structure of the silver electrode. The results from electrochemical measurement indicate that the corrosion resistance of silver is improved by the ODT SAMs. Adsorption of the ODT SAMs follows the Langmuir’s adsorption isotherm, and the adsorption mechanism is typical chemisorption

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杜 偉,萬 俐,李佳佳,陳步榮,丁 毅.水溶液中自組裝膜對(duì)銀的緩蝕作用及吸附機(jī)理分析[J].稀有金屬材料與工程,2013,42(3):545~549.[Du Wei, Wan Li, Li Jiajia, Chen Burong, Ding Yi. Anticorrosion Action and Adsorption Mechanism of the Self-Assemble Monolayers[J]. Rare Metal Materials and Engineering,2013,42(3):545~549.]
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  • 收稿日期:2012-12-19
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