Graphene-linked graphitic carbon nitride/TiO2 nanowire arrays heterojunction for efficient solar-driven water splitting

Jingyang Su; Ping Geng; Xinyong Li; Guohua Chen

doi:10.1007/s10800-016-0928-2

Graphene-linked graphitic carbon nitride/TiO₂ nanowire arrays heterojunction for efficient solar-driven water splitting

Jingyang Su, Ping Geng, Xinyong Li, Guohua Chen^*

^*Corresponding author for this work

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

22 Citations (Scopus)

Abstract

Abstract: A novel structure composed of TiO₂ nanowire arrays (NWAs) was designed and synthesized by decorating with graphene-linked graphitic carbon nitride (GCN) layers. It serves as a robust photoanode for high-performance solar-driven water splitting in an alkaline solution. The GCN layers were deposited on TiO₂ NWAs by a facile electrophoretic method, producing an interconnected two-dimensional GCN nanosheets/one-dimensional TiO₂ NWAs heterostructure. Under simulated solar light illumination (light intensity 100 mW cm⁻²), the optimal GCN/TiO₂ NWAs photoelectrode produces a photocurrent density of 1.7 mA cm⁻² at 1.23 V versus reversible hydrogen electrode (RHE), which is around 2.6 times enhancement from that of pristine TiO₂ (0.7 mA cm⁻² at 1.23 V vs. RHE). The photo-conversion efficiency of GCN/TiO₂ NWAs is up to 0.92 % at a low bias potential 0.50 V versus RHE, 3.6 times higher than pristine TiO₂ (0.27 % at 0.59 V vs. RHE). The improved photoelectrochemical activity is mainly because of the improved charge separation and transport within the heterojunction as well as enhanced light absorption. Graphical Abstract: [Figure not available: see fulltext.]

Original language	English
Pages (from-to)	807-817
Journal	Journal of Applied Electrochemistry
Volume	46
Issue number	8
DOIs	https://doi.org/10.1007/s10800-016-0928-2
Publication status	Published - 1 Aug 2016
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].

Research Keywords

Graphitic carbon nitride
Photoelectrochemical
TiO2 nanowire arrays
Water splitting

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title = "Graphene-linked graphitic carbon nitride/TiO2 nanowire arrays heterojunction for efficient solar-driven water splitting",

abstract = "Abstract: A novel structure composed of TiO2 nanowire arrays (NWAs) was designed and synthesized by decorating with graphene-linked graphitic carbon nitride (GCN) layers. It serves as a robust photoanode for high-performance solar-driven water splitting in an alkaline solution. The GCN layers were deposited on TiO2 NWAs by a facile electrophoretic method, producing an interconnected two-dimensional GCN nanosheets/one-dimensional TiO2 NWAs heterostructure. Under simulated solar light illumination (light intensity 100 mW cm−2), the optimal GCN/TiO2 NWAs photoelectrode produces a photocurrent density of 1.7 mA cm−2 at 1.23 V versus reversible hydrogen electrode (RHE), which is around 2.6 times enhancement from that of pristine TiO2 (0.7 mA cm−2 at 1.23 V vs. RHE). The photo-conversion efficiency of GCN/TiO2 NWAs is up to 0.92 % at a low bias potential 0.50 V versus RHE, 3.6 times higher than pristine TiO2 (0.27 % at 0.59 V vs. RHE). The improved photoelectrochemical activity is mainly because of the improved charge separation and transport within the heterojunction as well as enhanced light absorption. Graphical Abstract: [Figure not available: see fulltext.]",

keywords = "Graphitic carbon nitride, Photoelectrochemical, TiO2 nanowire arrays, Water splitting",

author = "Jingyang Su and Ping Geng and Xinyong Li and Guohua Chen",

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doi = "10.1007/s10800-016-0928-2",

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T1 - Graphene-linked graphitic carbon nitride/TiO2 nanowire arrays heterojunction for efficient solar-driven water splitting

AU - Su, Jingyang

AU - Geng, Ping

AU - Li, Xinyong

AU - Chen, Guohua

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 - 2016/8/1

Y1 - 2016/8/1

N2 - Abstract: A novel structure composed of TiO2 nanowire arrays (NWAs) was designed and synthesized by decorating with graphene-linked graphitic carbon nitride (GCN) layers. It serves as a robust photoanode for high-performance solar-driven water splitting in an alkaline solution. The GCN layers were deposited on TiO2 NWAs by a facile electrophoretic method, producing an interconnected two-dimensional GCN nanosheets/one-dimensional TiO2 NWAs heterostructure. Under simulated solar light illumination (light intensity 100 mW cm−2), the optimal GCN/TiO2 NWAs photoelectrode produces a photocurrent density of 1.7 mA cm−2 at 1.23 V versus reversible hydrogen electrode (RHE), which is around 2.6 times enhancement from that of pristine TiO2 (0.7 mA cm−2 at 1.23 V vs. RHE). The photo-conversion efficiency of GCN/TiO2 NWAs is up to 0.92 % at a low bias potential 0.50 V versus RHE, 3.6 times higher than pristine TiO2 (0.27 % at 0.59 V vs. RHE). The improved photoelectrochemical activity is mainly because of the improved charge separation and transport within the heterojunction as well as enhanced light absorption. Graphical Abstract: [Figure not available: see fulltext.]

AB - Abstract: A novel structure composed of TiO2 nanowire arrays (NWAs) was designed and synthesized by decorating with graphene-linked graphitic carbon nitride (GCN) layers. It serves as a robust photoanode for high-performance solar-driven water splitting in an alkaline solution. The GCN layers were deposited on TiO2 NWAs by a facile electrophoretic method, producing an interconnected two-dimensional GCN nanosheets/one-dimensional TiO2 NWAs heterostructure. Under simulated solar light illumination (light intensity 100 mW cm−2), the optimal GCN/TiO2 NWAs photoelectrode produces a photocurrent density of 1.7 mA cm−2 at 1.23 V versus reversible hydrogen electrode (RHE), which is around 2.6 times enhancement from that of pristine TiO2 (0.7 mA cm−2 at 1.23 V vs. RHE). The photo-conversion efficiency of GCN/TiO2 NWAs is up to 0.92 % at a low bias potential 0.50 V versus RHE, 3.6 times higher than pristine TiO2 (0.27 % at 0.59 V vs. RHE). The improved photoelectrochemical activity is mainly because of the improved charge separation and transport within the heterojunction as well as enhanced light absorption. Graphical Abstract: [Figure not available: see fulltext.]

KW - Graphitic carbon nitride

KW - Photoelectrochemical

KW - TiO2 nanowire arrays

KW - Water splitting

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