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The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2.

ABSTRACT: 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.

SUBMITTER: Zhang F 

PROVIDER: S-EPMC9063949 | biostudies-literature | 2019 Apr

REPOSITORIES: biostudies-literature

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The preparation of organophosphorus ligand-modified SBA-15 for effective adsorption of Congo red and Reactive red 2.

Zhang Fan F   Yang Chuting C   Li Yi Y   Chen Min M   Hu Sheng S   Cheng Haiming H  

RSC advances 20190401 24

P,P-bis (2-oxooxazolidin-3-yl)-<i>N</i>-(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  ...[more]

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