Oak Ridge National Laboratory, Oak Ridge, Tennessee 37831-6181, United States.
Environ Sci Technol. 2011 Dec 1;45(23):10243-9. doi: 10.1021/es201551e. Epub 2011 Nov 7.
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.
自组装介孔碳 (MC) 材料已被合成并测试，以应用于盐水的电容去离子 (CDI)。MC 通过氢键链的三嵌段共聚物在酸性条件下自组装制备，例如间苯二酚或邻苯三酚，然后进行碳化，在某些情况下，通过 KOH 进行活化。以这种方式合成的碳被研磨成粉末，从中可以生产出活化的 MC 片。在该工艺的一种变体中，三嵌段共聚物与间苯二酚或邻苯三酚反应后，形成的凝胶被用于涂覆石墨板，然后进行碳化。在这种情况下，涂覆的石墨板没有被活化，并在 CDI 过程中被测试用作集流器。将这些 MC 材料的性能与碳气凝胶的性能进行了比较，盐浓度范围在 1000ppm 至 35000ppm 之间。基于间苯二酚的 MC 每克碳可去除高达 15.2mg 的盐，而碳气凝胶每克碳可去除 5.8mg 的盐。基于邻苯三酚的 MC 涂覆石墨在 35000ppm 盐浓度下每克碳可去除 21mg 的盐，具有最高的离子去除能力。
