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首页> 外文期刊>Journal of Materials Science >Studying chemical activation in carbon xerogels
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Studying chemical activation in carbon xerogels

机译：研究碳干凝胶中的化学活化

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Chemical activation of carbon xerogels synthesized with different resorcinol/sodium carbonate molar ratios (R/C) was performed using alkaline hydroxides (KOH and NaOH). The effect of R/C and the type and amount of alkaline hydroxide on the final properties of the activated carbon xerogels were evaluated. It was found that, in general, both hydroxides produce an increase in microporosity regardless of the R/C value chosen, without altering the meso/macroporosity developed during the synthesis. KOH develops the microporosity of micro-mesoporous carbon xerogels more efficiently than NaOH, and for samples of large pore size (micro-macroporous samples), a similar textural development was observed for both hydroxides. However, when NaOH is used as activating agent, it is more difficult to eliminate residual Na from the activated carbon xerogels.
机译：使用碱性氢氧化物（KOH和NaOH）对以不同间苯二酚/碳酸钠摩尔比（R / C）合成的碳干凝胶进行化学活化。评价了R / C以及碱性氢氧化物的类型和量对活性炭干凝胶最终性能的影响。已发现，通常，两种氢氧化物均产生微孔性的增加，而与所选择的R / C值无关，而不会改变合成过程中产生的介孔/大孔度。 KOH比NaOH更有效地开发了微中孔碳干凝胶的微孔性，对于大孔径的样品（微大孔样品），两种氢氧化物的结构也相似。然而，当使用NaOH作为活化剂时，更难以从活性炭干凝胶中除去残留的Na。

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