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Updated: Jan 16, 2026

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Bio-inspired Polydopamine Surface Modification of Nanodiamonds and Its Reduction of Silver Nanoparticles

Published on: November 14, 2018

Harnessing Polyaminal Porous Networks for Sustainable Environmental Applications Using Ultrafine Silver

Bedour Almalki¹, Maymounah A Alrayyani¹, Effat A Bahaidarah¹

¹Chemistry Department, Faculty of Science, King Abdulaziz University, P.O. Box 80203, Jeddah 21589, Saudi Arabia.

|September 27, 2025

Summary

This study developed novel silver nanoparticles embedded in porous polyaminals to combat environmental pollution. The material efficiently captures carbon dioxide and removes heavy metals like copper, offering a sustainable solution.

Keywords:

CO2 capture heavy metal removal melamine-based porous polyaminals reverse double-solvent method silver nanoparticles (Ag NPs)

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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

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Last Updated: Jan 16, 2026

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Detection and Recovery of Palladium, Gold and Cobalt Metals from the Urban Mine Using Novel Sensors/Adsorbents Designated with Nanoscale Wagon-wheel-shaped Pores

Published on: December 6, 2015

Area of Science:

Environmental Science
Materials Science
Nanotechnology

Background:

Greenhouse gas (GHG) emissions, particularly carbon dioxide (CO2), drive climate change.
Heavy metal contamination (Ni, Cd, Cu, Hg, Pb) degrades water and soil quality.
Noble metal nanoparticles (MNPs) show potential for pollution remediation but suffer from aggregation and instability.

Purpose of the Study:

To synthesize stable silver nanoparticles (Ag NPs) for environmental applications.
To develop a novel porous material for effective Ag NP immobilization.
To evaluate the material's efficacy in carbon dioxide capture and heavy metal removal.

Main Methods:

Utilized the reverse double-solvent method (RDSM) to synthesize melamine-based porous polyaminals (POPs).
Achieved in situ growth of silver nanoparticles (Ag NPs) within the POPs structure.
Characterized the Ag NPs@POPs material for surface area, pore volume, and composition.

Main Results:

Synthesized Ag NPs@POPs with ultrafine Ag NP sizes, high surface area (~279 m²/g), and total pore volume (1.21 cm³/g).
Demonstrated significant CO2 capture capacity (2.99 mmol/g at 273 K and 1 bar).
Achieved high removal efficiency for Cu(II) ions (99.04%).

Conclusions:

Nitrogen-rich POPs effectively immobilize and stabilize Ag NPs.
Ag NPs@POPs exhibit excellent performance as adsorbents for selective CO2 capture.
The developed material shows great promise for environmental remediation, including heavy metal removal.