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首页> 外文期刊>RSC Advances >The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2
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The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2

机译：有机磷配体修饰的SBA-15的制备对刚果红和活性红2的有效吸附

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摘要

P,P-bis (2-oxooxazolidin-3-yl)- N -(3-(triethoxysilyl)propyl)phosphinic amide (APTES-BOP)-modified SBA-15 (SBA-15-BOP) was prepared by a post-synthesis grafting method for the removal of anionic azo dyes from aqueous solutions. The properties of the prepared adsorbent were characterized by PXRD, FT-IR, SEM, TEM, nitrogen sorption, and elemental analysis. Adsorption equilibrium and adsorption kinetic studies demonstrated that the experimental data fitted well with the Langmuir isotherm model and pseudo-second-order model. According to Langmuir fitting, SBA-15-BOP showed high adsorption capacity for CR and RR2 dyes, with the maximum adsorption capacities of 518.1?mg g ~(?1) and 253.8 mg g ~(?1) , respectively. The thermodynamic study indicated that the adsorption processes of CR and RR2 dyes on SBA-15-BOP were spontaneous and exothermal. The prepared SBA-15-BOP can be a promising adsorbent for the removal of anionic dyes from aqueous solutions.
机译：P，P-双（2-氧杂恶唑烷-3-基）-N-（3-（三乙氧基甲硅烷基）丙基）次膦酰胺（APTES-BOP）修饰的SBA-15（SBA-15-BOP）合成接枝法从水溶液中去除阴离子偶氮染料。通过PXRD，FT-IR，SEM，TEM，氮吸附和元素分析对制备的吸附剂的性能进行了表征。吸附平衡和吸附动力学研究表明，实验数据与Langmuir等温模型和伪二级模型非常吻合。根据Langmuir拟合，SBA-15-BOP对CR和RR2染料显示出高吸附容量，最大吸附容量分别为518.1？mg g〜（？1）和253.8 mg g〜（？1）。热力学研究表明，CR和RR2染料在SBA-15-BOP上的吸附过程是自发的和放热的。制备的SBA-15-BOP可能是从水溶液中去除阴离子染料的有前途的吸附剂。

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