Biochar-Based Photothermal Hydrogel for Efficient Solar Water Purification

The development of technology for solar interface evaporation has a significant meaning for the sustainable use of water resources in remote regions. However, establishing a solar evaporator with a high evaporation rate and favorable water treatment capabilities remains challenging. In this work, we...

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Bibliographic Details
Published in:Molecules (Basel, Switzerland) Switzerland), 2023-01, Vol.28 (3), p.1157
Main Authors: Wang, Liang, Wei, Jilei, Fang, Kun, Zhou, Chen, Yang, Shengyang
Format: Article
Language:English
Subjects:
ACPH membrane
AgNP@CC hybrid
Aquatic plants
Carbon
Charcoal
China
Desalination
Evaporation
Evaporation rate
Evaporators
Experiments
Germany
Heavy metals
Hydrogels
Light
Membranes
Methylene blue
Microscopy
Nanoparticles
Photothermal conversion
Pollutant removal
Pollutants
Polyvinyl alcohol
Remote regions
Saline water conversion
Sea-water
Seawater
seawater desalination
Sewage
Silver
solar interface evaporation
Sustainable use
Wastewater
wastewater purification
Water
Water crises
Water purification
Water resources
Water shortages
Water supply
Water transportation
Water treatment
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Summary:The development of technology for solar interface evaporation has a significant meaning for the sustainable use of water resources in remote regions. However, establishing a solar evaporator with a high evaporation rate and favorable water treatment capabilities remains challenging. In this work, we reported a silver nanoparticle (AgNP)@carbonized cattail (CC)/polyvinyl alcohol (PVA) composite hydrogel (ACPH) membrane. Because of the successfully loaded AgNPs, which have a photothermal synergy with the CC, the ACPH-10 membrane obtained an excellent photothermal conversion performance. Additionally, the hydrophilicity of the ACPH-10 membrane ensures a sustainable water supply which is necessary for the improvement of the evaporation rate. Therefore, the ACPH-10 membrane achieves an evaporation rate of 1.66 kg m h and an efficiency of 88.0%, attributed to the remarkable photothermal conversion and water transmission. More importantly, the membrane exhibits superior purification ability in a variety of sewage. Pollutant removal rates in heavy metal and organic dye sewage have exceeded 99.8%. As a result, the ACPH membrane holds great promise for wastewater recovery and seawater desalination, which can aid in resolving the water crisis issue.
ISSN:1420-3049
1420-3049
DOI:10.3390/molecules28031157