Highly Efficient and Selective Adsorption of Cationic Dyes in Aqueous Media on Microporous Hyper Crosslinked Polymer with Abundant and Evenly Dispersed Sulfonic Groups,ChemistrySelect

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Highly Efficient and Selective Adsorption of Cationic Dyes in Aqueous Media on Microporous Hyper Crosslinked Polymer with Abundant and Evenly Dispersed Sulfonic Groups
ChemistrySelect ( IF 1.9 ) Pub Date : 2020-06-09 , DOI: 10.1002/slct.202000927
Gang Xiong _{1,

2} , Qian Zhang _{1,

2} , Baoyi Ren _{1,

2} , Lixin You _{1,

2} , Fu Ding _{1,

2} , Yongke He _{1,

2} , Xiaolei Fan ₃ , Na Wang ₂ , Yaguang Sun _{1,

2}

Affiliation

To significantly promote the adsorption efficiency of dyes from aqueous media, a microporous hyper‐crosslinked polymer with abundant and evenly‐dispersed sulfonic groups acted as efficient and selective sites (HCP‐1 ) was synthesized via Friedel‐Crafts alkylation reaction from a simple Schiff‐based monomer containing sulfonic groups. HCP‐1 possessed micro‐plate morphology with the thickness of about 200 nm and high specific surface area of ∼1,111 m² g⁻¹. HCP‐1 displayed good adsorption capacities toward cationic dyes methylene blue (MB, 1,602.2 mg g⁻¹) and basic blue 7 (BB7, 496.7 mg g⁻¹) at 25 °C, but no adsorption capacity to anionic dye methyl orange (MO), showing charge selectivity. The pseudo‐second‐order kinetic model and Langmuir isotherm model were suitable for the describing adsorption process. The negative ΔG ⁰ values and the positive ΔH ⁰ values indicated that adsorption was spontaneous and endothermic. HCP‐1 still maintained adsorption efficiency of above 96% during five cycles. On the whole, HCP‐1 is an efficient and promising material in the future research and application in the purification of water polluted by cationic dyes. Furthermore, this work also develops a new strategy to directly synthesize porous HCPs containing abundant and evenly‐dispersed sulfonic groups on inner surface by designing suitable organic monomers.

中文翻译：

具有丰富且均匀分散的磺酸基的微孔超交联聚合物对水性染料阳离子染料的高效选择性吸附

为了显着提高染料在水性介质中的吸附效率，通过简单的Schiff-Friedel-Crafts烷基化反应合成了具有丰富且均匀分散的磺酸基团的微孔超交联聚合物，作为有效和选择性的位点（HCP-1）。磺酸基的单体。HCP-1具有微板形态，厚度约为200 nm，比表面积约为1,111 m ² g ^-1。HCP-1显示朝向阳离子染料良好的吸附能力，亚甲蓝（MB，1,602.2毫克克^-1）和碱性蓝7（BB7，496.7毫克克^-1）在25°C下，但对阴离子染料甲基橙（MO）没有吸附能力，显示出电荷选择性。拟二级动力学模型和Langmuir等温模型适合描述吸附过程。负Δ ģ ⁰值和正Δ ħ ⁰值表明，吸附是自发的吸热。在五个循环中，HCP-1的吸附效率仍保持在96％以上。总体而言，HCP-1是未来在阳离子染料污染的水的净化研究和应用中有效和有前途的材料。此外，这项工作还开发了一种新策略，可以通过设计合适的有机单体直接合成内表面含有丰富且均匀分散的磺酸基的多孔HCP。

更新日期：2020-06-09

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