Design and Characterization of Concave Hollow Double-Layer Nanospheres for Efficient Cd(II) and Pb(II) Adsorption DOI

Fangfen Jing,

Xin Xu,

Weiwei Lu

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 12, 2025

Polymer-based adsorbents have emerged as promising candidates for heavy-metal remediation due to their tailorable porosity and multifunctional surfaces, yet challenges persist in achieving both structural precision adsorption efficiency. Here, we report a concave hollow double-layer nanosphere (CHDN) synthesized through facile self-assembly strategy engineered selective capture of Cd(II) Pb(II) ions. Comprehensive characterization via transmission electron microscopy (TEM), scanning (SEM), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetric analysis (TGA) confirmed the hierarchical architecture with abundant amino/hydroxyl moieties. The CHDN demonstrated exceptional capacities 198.40 mg/g 60.34 Pb(II), outperforming conventional adsorbents. Isotherm revealed followed Sips model (R2 > 0.99), while adhered Langmuir model, suggesting monolayer heterogeneous binding mechanisms, respectively. Kinetic studies further corroborated chemisorption dominance pseudo-second-order fitting Elovich compatibility Pb(II). We propose synergistic mechanism involving ligand complexation ion exchange, facilitated by dual functionality surface groups advantages architecture. This work provides blueprint designing spatially polymers environmental remediation.

Язык: Английский

Design and Characterization of Concave Hollow Double-Layer Nanospheres for Efficient Cd(II) and Pb(II) Adsorption DOI

Fangfen Jing,

Xin Xu,

Weiwei Lu

и другие.

Langmuir, Год журнала: 2025, Номер unknown

Опубликована: Апрель 12, 2025

Polymer-based adsorbents have emerged as promising candidates for heavy-metal remediation due to their tailorable porosity and multifunctional surfaces, yet challenges persist in achieving both structural precision adsorption efficiency. Here, we report a concave hollow double-layer nanosphere (CHDN) synthesized through facile self-assembly strategy engineered selective capture of Cd(II) Pb(II) ions. Comprehensive characterization via transmission electron microscopy (TEM), scanning (SEM), Fourier transform infrared spectroscopy (FT-IR), Raman spectroscopy, thermogravimetric analysis (TGA) confirmed the hierarchical architecture with abundant amino/hydroxyl moieties. The CHDN demonstrated exceptional capacities 198.40 mg/g 60.34 Pb(II), outperforming conventional adsorbents. Isotherm revealed followed Sips model (R2 > 0.99), while adhered Langmuir model, suggesting monolayer heterogeneous binding mechanisms, respectively. Kinetic studies further corroborated chemisorption dominance pseudo-second-order fitting Elovich compatibility Pb(II). We propose synergistic mechanism involving ligand complexation ion exchange, facilitated by dual functionality surface groups advantages architecture. This work provides blueprint designing spatially polymers environmental remediation.

Язык: Английский

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