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首页> 外文期刊>Chemistry: A European journal >Channelled Porous TiO_2 Synthesized with a Water-in-Oil Microemulsion
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Channelled Porous TiO_2 Synthesized with a Water-in-Oil Microemulsion

机译：油包水型微乳液合成的通道化多孔TiO_2

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摘要

Porous titanium dioxide synthesized with a bicontinuous surfactant template is a promising method that leads to a high active surface area electrode. The template used is based on a water/isooctane/dioctyl sodium sulfosuccinate salt together with lecithin. Several parameters were varied during the synthesis to understand and optimize channel formation mechanisms. The material is patterned in stacked conical channels, widening towards the centre of the grains. The active surface area increased by 116% when the concentration of alkoxide precursors was decreased and increased by 241% when the template formation temperature was decreased to 10 °C. Increasing the oil phase viscosity tends to widen the pore aperture, thus decreasing the overall active surface area. Changing the phase proportions alters the microemulsion integrity and disrupts channel formation.
机译：用双连续表面活性剂模板合成的多孔二氧化钛是一种有前途的方法，可产生高活性表面积的电极。使用的模板基于水/异辛烷/磺基琥珀酸二辛基钠盐和卵磷脂。在合成过程中改变了几个参数，以了解和优化通道形成机理。该材料在堆积的锥形通道中形成图案，并朝着晶粒的中心扩展。当降低醇盐前体的浓度时，有效表面积增加116％;当模板形成温度降至10°C时，活性表面积增加241％。油相粘度的增加趋向于扩大孔的孔径，从而减小了总的有效表面积。改变相比例会改变微乳液的完整性并破坏通道的形成。

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