Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting

Guilian Zhu; Hao Yin; Chongyin Yang; Houlei Cui; Zhou Wang; Jijian Xu; Tianquan Lin; Fuqiang Huang

doi:10.1002/cctc.201500488

Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting

Guilian Zhu (Co-first Author)
, Hao Yin (Co-first Author)
, Chongyin Yang
, Houlei Cui
, Zhou Wang
, Jijian Xu
, Tianquan Lin^*
, Fuqiang Huang

^*Corresponding author for this work

Research output: Journal Publications and Reviews › RGC 21 - Publication in refereed journal › peer-review

100 Citations (Scopus)

Abstract

To utilize visible-light solar energy to meet environmental and energy crises, black TiO2 as a photocatalyst is an excellent solution to clean polluted air and water and to produce H2. Herein, black TiO2 with a crystalline core-amorphous shell structure reduced easily by CaH2 at 400°C is demonstrated to harvest over 80% solar absorption, whereas white TiO2 harvests only 7%, and possesses superior photocatalytic performances in the degradation of organics and H2 production. Its water decontamination is 2.4times faster and its H2 production was 1.7times higher than that of pristine TiO2. Photoelectrochemical measurements reveal that the reduced samples exhibit greatly improved carrier densities, charge separation, and photocurrent (a 4.5-fold increase) compared with the original TiO2. Consequently, this facile and versatile method could provide a promising and cost-effective approach to improve the visible-light absorption and performance of TiO2 in photocatalysis. Back to black: Black TiO2 with excellent solar absorption (81%) is reduced successfully at low temperature (300-400°C) by CaH2. Defect states and structure distortion are introduced, which enables a bandgap decrease and visible-light absorption. The black TiO2 delivers superior photocatalytic and photoelectrochemical water-splitting performance, 1.7- and 4.5-fold higher over pristine TiO2, respectively. Water decontamination is also improved greatly (2.4times) after reduction. CB=conduction band; VB=valence band. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

Original language	English
Pages (from-to)	2614-2619
Journal	ChemCatChem
Volume	7
Issue number	17
Online published	6 Aug 2015
DOIs	https://doi.org/10.1002/cctc.201500488
Publication status	Published - 1 Sept 2015
Externally published	Yes

Bibliographical note

Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

Funding

This work was financially supported by NSF of China (Grant Nos. 91122034, 51125006, 61376056, and 51402336), and Science and Technology Commission of Shanghai (Grants 13JC1405700 and 14YF1406500).

UN SDGs

This output contributes to the following UN Sustainable Development Goals (SDGs)

SDG 7 Affordable and Clean Energy

Research Keywords

electrochemistry
hydrogen
photochemistry
titanium
water splitting

Access Output

10.1002/cctc.201500488

Other Access Options

Check CityUHK Library

Permanent Link

Right click to copy link

Cite this

@article{97c4ad6810eb4600b9dd92c5563baf10,

title = "Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting",

abstract = "To utilize visible-light solar energy to meet environmental and energy crises, black TiO2 as a photocatalyst is an excellent solution to clean polluted air and water and to produce H2. Herein, black TiO2 with a crystalline core-amorphous shell structure reduced easily by CaH2 at 400°C is demonstrated to harvest over 80\% solar absorption, whereas white TiO2 harvests only 7\%, and possesses superior photocatalytic performances in the degradation of organics and H2 production. Its water decontamination is 2.4times faster and its H2 production was 1.7times higher than that of pristine TiO2. Photoelectrochemical measurements reveal that the reduced samples exhibit greatly improved carrier densities, charge separation, and photocurrent (a 4.5-fold increase) compared with the original TiO2. Consequently, this facile and versatile method could provide a promising and cost-effective approach to improve the visible-light absorption and performance of TiO2 in photocatalysis. Back to black: Black TiO2 with excellent solar absorption (81\%) is reduced successfully at low temperature (300-400°C) by CaH2. Defect states and structure distortion are introduced, which enables a bandgap decrease and visible-light absorption. The black TiO2 delivers superior photocatalytic and photoelectrochemical water-splitting performance, 1.7- and 4.5-fold higher over pristine TiO2, respectively. Water decontamination is also improved greatly (2.4times) after reduction. CB=conduction band; VB=valence band. {\textcopyright} 2015 WILEY-VCH Verlag GmbH \& Co. KGaA, Weinheim.",

keywords = "electrochemistry, hydrogen, photochemistry, titanium, water splitting",

author = "Guilian Zhu and Hao Yin and Chongyin Yang and Houlei Cui and Zhou Wang and Jijian Xu and Tianquan Lin and Fuqiang Huang",

note = "Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected]. ",

year = "2015",

month = sep,

day = "1",

doi = "10.1002/cctc.201500488",

language = "English",

volume = "7",

pages = "2614--2619",

journal = "ChemCatChem",

issn = "1867-3880",

publisher = "Wiley-VCH Verlag GmbH",

number = "17",

}

TY - JOUR

T1 - Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting

AU - Zhu, Guilian

AU - Yin, Hao

AU - Yang, Chongyin

AU - Cui, Houlei

AU - Wang, Zhou

AU - Xu, Jijian

AU - Lin, Tianquan

AU - Huang, Fuqiang

N1 - Publication details (e.g. title, author(s), publication statuses and dates) are captured on an “AS IS” and “AS AVAILABLE” basis at the time of record harvesting from the data source. Suggestions for further amendments or supplementary information can be sent to [email protected].

PY - 2015/9/1

Y1 - 2015/9/1

N2 - To utilize visible-light solar energy to meet environmental and energy crises, black TiO2 as a photocatalyst is an excellent solution to clean polluted air and water and to produce H2. Herein, black TiO2 with a crystalline core-amorphous shell structure reduced easily by CaH2 at 400°C is demonstrated to harvest over 80% solar absorption, whereas white TiO2 harvests only 7%, and possesses superior photocatalytic performances in the degradation of organics and H2 production. Its water decontamination is 2.4times faster and its H2 production was 1.7times higher than that of pristine TiO2. Photoelectrochemical measurements reveal that the reduced samples exhibit greatly improved carrier densities, charge separation, and photocurrent (a 4.5-fold increase) compared with the original TiO2. Consequently, this facile and versatile method could provide a promising and cost-effective approach to improve the visible-light absorption and performance of TiO2 in photocatalysis. Back to black: Black TiO2 with excellent solar absorption (81%) is reduced successfully at low temperature (300-400°C) by CaH2. Defect states and structure distortion are introduced, which enables a bandgap decrease and visible-light absorption. The black TiO2 delivers superior photocatalytic and photoelectrochemical water-splitting performance, 1.7- and 4.5-fold higher over pristine TiO2, respectively. Water decontamination is also improved greatly (2.4times) after reduction. CB=conduction band; VB=valence band. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

AB - To utilize visible-light solar energy to meet environmental and energy crises, black TiO2 as a photocatalyst is an excellent solution to clean polluted air and water and to produce H2. Herein, black TiO2 with a crystalline core-amorphous shell structure reduced easily by CaH2 at 400°C is demonstrated to harvest over 80% solar absorption, whereas white TiO2 harvests only 7%, and possesses superior photocatalytic performances in the degradation of organics and H2 production. Its water decontamination is 2.4times faster and its H2 production was 1.7times higher than that of pristine TiO2. Photoelectrochemical measurements reveal that the reduced samples exhibit greatly improved carrier densities, charge separation, and photocurrent (a 4.5-fold increase) compared with the original TiO2. Consequently, this facile and versatile method could provide a promising and cost-effective approach to improve the visible-light absorption and performance of TiO2 in photocatalysis. Back to black: Black TiO2 with excellent solar absorption (81%) is reduced successfully at low temperature (300-400°C) by CaH2. Defect states and structure distortion are introduced, which enables a bandgap decrease and visible-light absorption. The black TiO2 delivers superior photocatalytic and photoelectrochemical water-splitting performance, 1.7- and 4.5-fold higher over pristine TiO2, respectively. Water decontamination is also improved greatly (2.4times) after reduction. CB=conduction band; VB=valence band. © 2015 WILEY-VCH Verlag GmbH & Co. KGaA, Weinheim.

KW - electrochemistry

KW - hydrogen

KW - photochemistry

KW - titanium

KW - water splitting

UR - https://www.scopus.com/pages/publications/84940704343

UR - https://www.scopus.com/pages/publications/84940704343#tab=impact

U2 - 10.1002/cctc.201500488

DO - 10.1002/cctc.201500488

M3 - RGC 21 - Publication in refereed journal

SN - 1867-3880

VL - 7

SP - 2614

EP - 2619

JO - ChemCatChem

JF - ChemCatChem

IS - 17

ER -

Black Titania for Superior Photocatalytic Hydrogen Production and Photoelectrochemical Water Splitting

Abstract

Bibliographical note

Funding

UN SDGs

Research Keywords

Access Output

Other Access Options

Permanent Link

Other Files and Links

Fingerprint

Cite this