Novel-structured electrospun TiO2/CuO composite nanofibers for high efficient photocatalytic cogeneration of clean water and energy from dye wastewater

Siew Siang Lee, Hongwei Bai, Zhaoyang Liu, Darren Delai Sun

Research output: Contribution to journalArticle

124 Citations (Scopus)

Abstract

It is still a challenge to photocatalytically cogenerate clean water and energy from dye wastewater owing to the relatively low photocatalytic efficiency of photocatalysts. In this study, novel-structured TiO2/CuO composite nanofibers were successfully fabricated via facile electrospinning. For the first time, the TiO2/CuO composite nanofibers demonstrated multifunctional ability for concurrent photocatalytic organic degradation and H2 generation from dye wastewater. The enhanced photocatalytic activity of TiO2/CuO composite nanofibers was ascribed to its excellent synergy of physicochemical properties: 1) mesoporosity and large specific surface area for efficient substrate adsorption, mass transfer and light harvesting; 2) red-shift of the absorbance spectra for enhanced light utilization; 3) long nanofibrous structure for efficient charge transfer and ease of recovery, 4) TiO2/CuO heterojunctions which enhance the separation of electrons and holes and 5) presence of CuO which serve as co-catalyst for the H2 production. The TiO2/CuO composite nanofibers also exhibited rapid settleability by gravity and uncompromised reusability. Thus, the as-synthesized TiO2/CuO composite nanofibers represent a promising candidate for highly efficient concurrent photocatalytic organic degradation and clean energy production from dye wastewater.

Original languageEnglish
Pages (from-to)4059-4073
Number of pages15
JournalWater Research
Volume47
Issue number12
DOIs
Publication statusPublished - 1 Aug 2013
Externally publishedYes

Fingerprint

cogeneration
Nanofibers
dye
Wastewater
Dyes
wastewater
Composite materials
energy
Water
water
Degradation
degradation
Reusability
Electrospinning
physicochemical property
Photocatalysts
absorbance
Specific surface area
Heterojunctions
Charge transfer

Keywords

  • Cogeneration
  • Dye wastewater
  • Electrospinning
  • Hydrogen generation
  • Nanofibers
  • TiO/CuO

ASJC Scopus subject areas

  • Water Science and Technology
  • Waste Management and Disposal
  • Pollution
  • Ecological Modelling

Cite this

Novel-structured electrospun TiO2/CuO composite nanofibers for high efficient photocatalytic cogeneration of clean water and energy from dye wastewater. / Lee, Siew Siang; Bai, Hongwei; Liu, Zhaoyang; Sun, Darren Delai.

In: Water Research, Vol. 47, No. 12, 01.08.2013, p. 4059-4073.

Research output: Contribution to journalArticle

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