A versatile solar-powered vapor generating membrane for multi-media purification

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review

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Author(s)

  • Peng Wan
  • Xiaobin Gu
  • Xiaolong Ouyang
  • Shuyu Shi
  • Baolin Deng
  • Jiaqi Liu
  • Xue-Feng Yu

Detail(s)

Original languageEnglish
Article number117952
Journal / PublicationSeparation and Purification Technology
Volume260
Online published28 Oct 2020
Publication statusPublished - 1 Apr 2021

Abstract

Water evaporation driven by solar energy is an efficient, renewable, and environmentally friendly method to purify polluted or saline water. However, current solar-powered evaporation systems generally suffer from the poor stability, high materials cost, and complex fabrication processes. In this work, an inexpensive and versatile photothermal membrane (PTM) is prepared with basalt-fibers, which are prepared from natural basalt and synthesized by fiber forming and annealing. Owing to the special chemical composition and physical structure, the basalt-fiber PTM is very robust and corrosion resistant in extreme environments such as a strong acid, organic solvent, and alkali. The water evaporation processes are investigated and the floating-with-insulator mode shows the lowest heat dissipation and highest water evaporation rate. The basalt-fiber fabric is optimized by carbonization and a vaporization rate of 1.50 kg·m−2·h−1 and energy utilization efficiency of 82.5% are achieved for evaporation of pure water. The basalt-fiber PTM can be hand washed at least 30 times without efficiency deterioration and the process can be readily scaled up to address commercial needs.

Research Area(s)

  • Basalt, Desalination, Photothermal, Solar energy, Water purification

Citation Format(s)

A versatile solar-powered vapor generating membrane for multi-media purification. / Wan, Peng; Gu, Xiaobin; Ouyang, Xiaolong; Shi, Shuyu; Deng, Baolin; Liu, Jiaqi; Chu, Paul K.; Yu, Xue-Feng.

In: Separation and Purification Technology, Vol. 260, 117952, 01.04.2021.

Research output: Journal Publications and Reviews (RGC: 21, 22, 62)21_Publication in refereed journalpeer-review