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首页> 外文期刊>RSC Advances >A combined H3PO4 activation and boron templating process for easy synthesis of highly porous, spherical activated carbons as a superior adsorbent for rhodamine B
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A combined H3PO4 activation and boron templating process for easy synthesis of highly porous, spherical activated carbons as a superior adsorbent for rhodamine B

机译：组合的H3PO4活化和硼模板过程，用于易于合成高度多孔的球形活性炭作为罗丹明B的高级吸附剂

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摘要

Spherical activated carbons (SACs) with a high surface area of 2729 m ~(2) g ~(?1) and a large total pore volume of 1.529 cm ~(3) g ~(?1) were easily prepared using phosphoric acid activation of polymeric precursor in which boron was embedded, followed by washing off of the boron phosphate formed in situ with a base solution. The reaction induced extraction of the pre-embedded boron from the carbon matrix which produced additional pores, and this greatly improved the textural properties of the SACs obtained. The SACs were tested as an adsorbent for bulky rhodamine B molecule, and the SACs exhibited an extremely high adsorption capability of up to 833 mg g ~(?1) at ambient temperature at an adsorbent dosage of 1 g L ~(?1) . The adsorption isotherms and kinetics data showed a good fit with the Langmuir isotherm model and a pseudo-second-order kinetic model, respectively, and this is suggestive of the formation of a rhodamine B (RB) monolayer on the SACs possibly through chemical interactions such as ionic or covalent bonds.
机译：使用磷酸活化易于制备高表面积为2729m〜（2）g〜（α1）的球形活性炭（囊），较大的总孔体积为1.529cm〜（3）g〜（α1）嵌入其中硼的聚合物前体，然后用碱溶液洗涤原位形成的硼磷酸盐。反应诱导从产生额外的孔的碳基质中提取预嵌入的硼，并且这大大提高了所获得的囊的纹理性质。将囊作为体积罗丹明B分子的吸附剂测试，并且囊在环境温度下在1g L〜（α1）的吸附剂剂量下在环境温度下显示出高达833mg的〜（α1）的极高吸附能力。吸附等温线和动力学数据分别良好地符合Langmuir等温线模型和伪二阶动力学模型，这是通过化学相互作用的化学相互作用的褪色式B（RB）单层的形成。作为离子或共价键。

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