Constructing black titania with unique nanocage structure for solar desalination

Guilian Zhu, Jijian Xu, Wenli Zhao, Fuqiang Huang*

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

268 Scopus citations

Abstract

Solar desalination driven by solar radiation as heat source is freely available, however, hindered by low efficiency. Herein, we first design and synthesize black titania with a unique nanocage structure simultaneously with light trapping effect to enhance light harvesting, well-crystallized interconnected nanograins to accelerate the heat transfer from titania to water and with opening mesopores (4-10 nm) to facilitate the permeation of water vapor. Furthermore, the coated self-floating black titania nanocages film localizes the temperature increase at the water-air interface rather than uniformly heating the bulk of the water, which ultimately results in a solar-thermal conversion efficiency as high as 70.9% under a simulated solar light with an intensity of 1 kW m-2 (1 sun). This finding should inspire new black materials with rationally designed structure for superior solar desalination performance.

Original languageEnglish (US)
Pages (from-to)31716-31721
Number of pages6
JournalACS Applied Materials and Interfaces
Volume8
Issue number46
DOIs
StatePublished - Nov 23 2016

Keywords

  • black titania
  • light trapping
  • mesoporous
  • nanocage
  • photothermal
  • solar desalination

ASJC Scopus subject areas

  • Materials Science(all)

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