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Related Experiment Video

Updated: Aug 10, 2025

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Synthesis of Hydrogels with Antifouling Properties As Membranes for Water Purification

Published on: April 7, 2017

Biochar-Based Photothermal Hydrogel for Efficient Solar Water Purification.

Liang Wang¹, Jilei Wei², Kun Fang²

¹School of Chemistry and Materials Engineering, Nanjing Polytechnic Institute, 188 Xinle Road, Nanjing 210048, China.

Molecules (Basel, Switzerland)

|February 11, 2023

Summary

A novel composite hydrogel membrane using silver nanoparticles and carbonized cattail enhances solar evaporation for sustainable water resource management. This advanced material achieves high evaporation rates and effectively purifies contaminated water, offering solutions for water scarcity.

Keywords:

ACPH membrane AgNP@CC hybrid seawater desalination solar interface evaporation wastewater purification

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Area of Science:

Materials Science
Environmental Engineering
Nanotechnology

Background:

Solar interface evaporation is crucial for sustainable water resource management, especially in remote areas.
Developing solar evaporators with high efficiency and water treatment capabilities presents significant challenges.

Purpose of the Study:

To engineer a composite hydrogel membrane for enhanced solar evaporation and water purification.
To investigate the synergistic effects of silver nanoparticles and carbonized cattail on photothermal conversion and water transmission.

Main Methods:

Fabrication of a silver nanoparticle (AgNP)@carbonized cattail (CC)/polyvinyl alcohol (PVA) composite hydrogel (ACPH) membrane.
Characterization of the ACPH membrane's photothermal conversion performance, hydrophilicity, and water transmission properties.
Evaluation of the membrane's evaporation rate, efficiency, and pollutant removal capabilities in various sewage types.

Main Results:

The ACPH-10 membrane demonstrated excellent photothermal conversion due to AgNP-CC synergy.
Achieved a high evaporation rate of 1.66 kg m⁻² h⁻¹ and 88.0% efficiency, driven by photothermal conversion and hydrophilicity.
Exhibited superior purification of heavy metal and organic dye sewage, with removal rates exceeding 99.8%.

Conclusions:

The developed ACPH membrane offers a promising solution for efficient solar water evaporation and purification.
The material holds significant potential for wastewater recovery and seawater desalination, addressing global water crisis issues.