Natural dyes as TIO2 sensitizers with membranes for photoelectrochemical water splitting: An overview

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Abstract

The development of titanium dioxide-based semiconductors has been widely studied due to the efficiency of this material in photoelectrochemical water splitting. However, the large band gap of titanium dioxide can only absorb UV light, thus reducing its performance in photoelectrochemical applications. Moreover, the recombination of electron-hole pairs also affects the efficiency of phototelectrochemical reactions. Thus, many efforts have been made to enhance the performance of titanium dioxide, and considerable attention has been focused on dye sensitizers, particularly natural dyes, due to their environmental friendliness and low cost. In addition, dye sensitizers exhibit fast electron injection and slow backward reactions. However, natural dye sensitizers are unstable in solution, thus requiring a protective layer, such as a conductive polymer layer. This paper presents an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dyes, the types of natural dyes used in water splitting and membranes used as protective layers.

LanguageEnglish
Pages698-709
Number of pages12
JournalRenewable and Sustainable Energy Reviews
Volume78
DOIs
StatePublished - 1 Oct 2017

Fingerprint

Dyes
Membranes
Water
Titanium dioxide
Electron injection
Pigments
Ultraviolet radiation
Energy gap
Semiconductor materials
Electrons
Polymers
Costs

Keywords

  • Membrane
  • Natural dye sensitizer
  • Photoelectrochemical cell
  • Titanium oxide
  • Water splitting

ASJC Scopus subject areas

  • Renewable Energy, Sustainability and the Environment

Cite this

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title = "Natural dyes as TIO2 sensitizers with membranes for photoelectrochemical water splitting: An overview",
abstract = "The development of titanium dioxide-based semiconductors has been widely studied due to the efficiency of this material in photoelectrochemical water splitting. However, the large band gap of titanium dioxide can only absorb UV light, thus reducing its performance in photoelectrochemical applications. Moreover, the recombination of electron-hole pairs also affects the efficiency of phototelectrochemical reactions. Thus, many efforts have been made to enhance the performance of titanium dioxide, and considerable attention has been focused on dye sensitizers, particularly natural dyes, due to their environmental friendliness and low cost. In addition, dye sensitizers exhibit fast electron injection and slow backward reactions. However, natural dye sensitizers are unstable in solution, thus requiring a protective layer, such as a conductive polymer layer. This paper presents an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dyes, the types of natural dyes used in water splitting and membranes used as protective layers.",
keywords = "Membrane, Natural dye sensitizer, Photoelectrochemical cell, Titanium oxide, Water splitting",
author = "Jaafar, {Siti Nur Hidayah} and Minggu, {Lorna Jeffery} and Khuzaimah Arifin and Kassim, {Mohammad B.} and Wan, {Wan Ramli Daud}",
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T2 - Renewable and Sustainable Energy Reviews

AU - Jaafar,Siti Nur Hidayah

AU - Minggu,Lorna Jeffery

AU - Arifin,Khuzaimah

AU - Kassim,Mohammad B.

AU - Wan,Wan Ramli Daud

PY - 2017/10/1

Y1 - 2017/10/1

N2 - The development of titanium dioxide-based semiconductors has been widely studied due to the efficiency of this material in photoelectrochemical water splitting. However, the large band gap of titanium dioxide can only absorb UV light, thus reducing its performance in photoelectrochemical applications. Moreover, the recombination of electron-hole pairs also affects the efficiency of phototelectrochemical reactions. Thus, many efforts have been made to enhance the performance of titanium dioxide, and considerable attention has been focused on dye sensitizers, particularly natural dyes, due to their environmental friendliness and low cost. In addition, dye sensitizers exhibit fast electron injection and slow backward reactions. However, natural dye sensitizers are unstable in solution, thus requiring a protective layer, such as a conductive polymer layer. This paper presents an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dyes, the types of natural dyes used in water splitting and membranes used as protective layers.

AB - The development of titanium dioxide-based semiconductors has been widely studied due to the efficiency of this material in photoelectrochemical water splitting. However, the large band gap of titanium dioxide can only absorb UV light, thus reducing its performance in photoelectrochemical applications. Moreover, the recombination of electron-hole pairs also affects the efficiency of phototelectrochemical reactions. Thus, many efforts have been made to enhance the performance of titanium dioxide, and considerable attention has been focused on dye sensitizers, particularly natural dyes, due to their environmental friendliness and low cost. In addition, dye sensitizers exhibit fast electron injection and slow backward reactions. However, natural dye sensitizers are unstable in solution, thus requiring a protective layer, such as a conductive polymer layer. This paper presents an overview of common pigments found in natural dyes, extraction methods, the general efficiency of natural dyes, the types of natural dyes used in water splitting and membranes used as protective layers.

KW - Membrane

KW - Natural dye sensitizer

KW - Photoelectrochemical cell

KW - Titanium oxide

KW - Water splitting

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