Mesoporous Carbon for Capacitive Deionization of Saline Water
Mesoporous Carbon for Capacitive Deionization of Saline Water
复制标题
DOI：
10.1021/es201551e
复制
发表时间：
2011-12-01
影响因子：
11.4
通讯作者：
Dai, S.
中科院分区：
文献类型：
--
作者：
Tsouris, C.;Mayes, R.;Dai, S.
合成了自组装介孔碳（MC）材料，并测试了其在盐水电容去离子（CDI）中的应用。MC是通过自组装的三嵌段共聚物与氢键链通过酚醛树脂，如间苯二酚或间苯三酚在酸性条件下，然后通过碳化，并在某些情况下，活化KOH。以这种方式合成的碳被研磨成粉末，由其生产活性MC片材。在该方法的变型中，在三嵌段共聚物与间苯二酚或间苯三酚反应后，使用形成的凝胶涂覆石墨板，然后涂覆。在这种情况下，涂覆的石墨板未被活化，并在CDI过程中被测试用作集电器。将这些MC材料的性能与碳气凝胶在1000 ppm至35，000 ppm的盐浓度范围内的性能进行比较。基于间苯二酚的MC去除高达15.2mg盐/克碳，而碳气凝胶去除5.8mg盐/克碳。基于间苯三酚的MC涂覆的石墨在35，000 ppm盐浓度下每克碳21 mg盐时表现出最高的离子去除能力。
Self-assembled mesoporous carbon (MC) materials have been synthesized and tested for application in capacitive deionization (CDI) of saline water. MC was prepared by self-assembly of a triblock copolymer with hydrogen-bonded chains via a phenolic resin, such as resorcinol or phloroglucinol in acidic conditions, followed by carbonization and, in some cases, activation by KOH. Carbon synthesized in this way was ground into powder, from which activated MC sheets were produced. In a variation of this process, after the reaction of triblock copolymer with resorcinol or phloroglucinol, the gel that was formed was used to coat a graphite plate and then carbonized. The coated graphite plate in this case was not activated and was tested to serve as current collector during the CDI process. The performance of these MC materials was compared to that of carbon aerogel for salt concentrations ranging between 1000 ppm and 35,000 ppm. Resorcinol-based MC removed up to 15.2 mg salt per gram of carbon, while carbon aerogel removed 5.8 mg salt per gram of carbon. Phloroglucinol-based MC-coated graphite exhibited the highest ion removal capacity at 21 mg of salt per gram of carbon for 35,000 ppm salt concentration.