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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Leaching in sol-gel-derived silica films for optical pH sensing
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Leaching in sol-gel-derived silica films for optical pH sensing

机译：溶胶-凝胶二氧化硅薄膜中的浸出以进行光学pH传感

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摘要

The effect of different processing parameters on the efficiency of entrapment of pH indicators in a sol-gel-derived silica film is reported. An evanescent wave absorption approach was used to monitor dopant-leaching from these films. The issues investigated include the effect on the rate of leaching of the water:alkoxide ratio, the pH of the leachant solution and the choice of silicon alkoxide. Results indicate that the most suitable sol-gel films in terms of leaching and response time are those prepared using tetraethoxysilane as precursor, acid catalysis and a water:alkoxide ratio of at least 4. Leaching is more pronounced for films used directly after preparation and varies for different pH environments. Implications of leaching for the lone-term use of sol-gel based pH sensors are discussed. (C) 1998 Elsevier Science B.V. [References: 20]
机译：报道了不同工艺参数对溶胶-凝胶衍生的二氧化硅膜中pH指示剂截留效率的影响。消逝波吸收方法用于监测这些膜中的掺杂物浸出。研究的问题包括对水：醇盐比率的浸出速率，浸出液的pH值和烷氧基硅的选择的影响。结果表明，就浸出和响应时间而言，最合适的溶胶-凝胶薄膜是使用四乙氧基硅烷作为前体，酸催化和水：醇盐比至少为4制备的。适用于不同的pH环境。讨论了浸出对基于溶胶-凝胶的pH传感器的单独使用的影响。 （C）1998 Elsevier Science B.V. [参考：20]

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