Porous Hydrogel Photothermal Conversion Membrane to Facilitate Water Purification

Hongping Zhang, Pengfei Tang, Youhong Tang, Chenghua Sun, Kun Yang, Wei Feng, Qingyuan Wang

Research output: Contribution to journalArticlepeer-review

7 Citations (Scopus)

Abstract

Solar water purification technology is one of the most potent methods to obtain freshwater due to its low cost and non-polluting characteristics. However, the purification efficiency is limited by the high ion concentration, organic pollution, and biological pollution during the actual water purification process. Here, we report a porous hydrogel membrane (Fe/TA-TPAM) for the purification of high ion concentration and contaminated water. The hydrogel membrane exhibits good light absorption and photothermal conversion ability, which shows high evaporation rates (1.4 kg m-2 h-1) and high solar efficiency for seawater. Furthermore, with the introduction of tannic acid (TA) and Ti3C2 MXenes, the Fe/TA-TPAM hydrogel membrane exhibits satisfied purification properties for organic-contaminated and biologically contaminated water. The excellent purification effect of Fe/TA-TPAM under light not only confirms the rationality of the hydrogel porous design and in situ generation of photosensitizer in improving the photothermal performance but also provides a novel strategy for designing advanced photothermal conversion membranes for water purification.

Original languageEnglish
Pages (from-to)7345-7352
Number of pages8
JournalLangmuir
Volume39
Issue number21
Early online date19 May 2023
DOIs
Publication statusPublished - 30 May 2023

Keywords

  • Evaporation
  • Hydrogels
  • Membranes
  • Water purification
  • Two dimensional materials

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