A Hybrid Artificial Photocatalysis System Splits Atmospheric Water for Simultaneous Dehumidification and Power Generation

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review

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Author(s)

  • Lin Yang
  • Dilip Krishna Nandakumar
  • Fuad Indra Alzakia
  • Wanheng Lu
  • Yaoxin Zhang
  • Jiachen Yang
  • Qian Zhang
  • Xueping Zhang
  • Swee Ching Tan

Detail(s)

Original languageEnglish
Article number1902963
Journal / PublicationAdvanced Materials
Volume31
Issue number51
Online published24 Oct 2019
Publication statusPublished - Dec 2019
Externally publishedYes

Abstract

A new approach for artificial photocatalysis of electrical generation directly from atmospheric water is reported. A hybrid system comprising a hydrogel incorporated with Cu2O and BaTiO3 nanoparticles is developed, wherein the Cu2O is designed to expose two different crystal planes, namely (100) and (111). These planes exhibit different surface potentials and form a polarization electric field of 2.3 kV cm−1 that acts on a ferroelectric dipole. With the help of this electric field, the dipole is redirected for aiding in positive and negative polarizations with (100) and (111) planes, then boosting water reduction and oxidation kinetics separately at (100) and (111) planes. Additonally, zinc-/cobalt-based superhygroscopic hydrogels serve as a water-capturing “hand” to harness humidity from the ambient environment. The integrated hydrogel–Cu2O@BaTiO3 hybrid is used to dehumidify air, which can split 36.5 mg of water by employing only 150 mg hydrogel and simultaneously generate a photocurrent of 224.3 µA cm−2 under 10 mW cm−2 illumination.

Research Area(s)

  • artificial photocatalysis, ferroelectrics, hydrogels, semiconductors, water splitting

Citation Format(s)

A Hybrid Artificial Photocatalysis System Splits Atmospheric Water for Simultaneous Dehumidification and Power Generation. / Yang, Lin; Ravi, Sai Kishore; Nandakumar, Dilip Krishna et al.
In: Advanced Materials, Vol. 31, No. 51, 1902963, 12.2019.

Research output: Journal Publications and ReviewsRGC 21 - Publication in refereed journalpeer-review