Cu-enhanced photoelectronic and ethanol sensing properties of Cu2O/Cu nanocrystals prepared by one-step controllable synthesis

Yao Hu; Muwei Ji; Yiqing He; Ziyi Liu; Qinghua Yang; Chaozheng Li; Jiajia Liu; Bo Li; Jiatao Zhang; Caizhen Zhu; Jin Wang

doi:10.1039/c7qi00657h

Cu-enhanced photoelectronic and ethanol sensing properties of Cu₂O/Cu nanocrystals prepared by one-step controllable synthesis

Yao Hu, Muwei Ji, Yiqing He, Ziyi Liu, Qinghua Yang, Chaozheng Li, Jiajia Liu, Bo Li, Jiatao Zhang^*, Caizhen Zhu, Jin Wang

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

7 Citations (Scopus)

Abstract

Metal nanocrystals are considered as effective components to enhance the photoelectronic properties of semiconductors. Herein, we report the enhancement of the photoelectronic response and photoelectronic catalysis on Cu₂O by forming a Cu nanocrystal layer on its surface via a one-step approach. The photocurrent of Cu₂O-rich Cu₂O/Cu reaches 190 μA cm^-2 in the first run and is about 4 times that of pure Cu₂O. The cyclic voltammetry (CV) signal for methanol oxidation with Cu₂O/Cu gives a higher methanol oxidation peak current than with that with Cu₂O when irradiated by ultraviolet-visible light. The ethanol gas sensing performance of Cu₂O-rich Cu₂O/Cu hetero-nanocrystals is also investigated. It is shown that the sensitivity of the Cu₂O-rich Cu₂O/Cu hetero-nanocrystals is higher (4.83) than that of Cu₂O nanocrystals (3.87) at an ethanol concentration of 2000 ppm.

Original language	English
Pages (from-to)	425-431
Number of pages	7
Journal	Inorganic Chemistry Frontiers
Volume	5
Issue number	2
DOIs	https://doi.org/10.1039/c7qi00657h
Publication status	Published - Feb 2018

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title = "Cu-enhanced photoelectronic and ethanol sensing properties of Cu2O/Cu nanocrystals prepared by one-step controllable synthesis",

abstract = "Metal nanocrystals are considered as effective components to enhance the photoelectronic properties of semiconductors. Herein, we report the enhancement of the photoelectronic response and photoelectronic catalysis on Cu2O by forming a Cu nanocrystal layer on its surface via a one-step approach. The photocurrent of Cu2O-rich Cu2O/Cu reaches 190 μA cm-2 in the first run and is about 4 times that of pure Cu2O. The cyclic voltammetry (CV) signal for methanol oxidation with Cu2O/Cu gives a higher methanol oxidation peak current than with that with Cu2O when irradiated by ultraviolet-visible light. The ethanol gas sensing performance of Cu2O-rich Cu2O/Cu hetero-nanocrystals is also investigated. It is shown that the sensitivity of the Cu2O-rich Cu2O/Cu hetero-nanocrystals is higher (4.83) than that of Cu2O nanocrystals (3.87) at an ethanol concentration of 2000 ppm.",

author = "Yao Hu and Muwei Ji and Yiqing He and Ziyi Liu and Qinghua Yang and Chaozheng Li and Jiajia Liu and Bo Li and Jiatao Zhang and Caizhen Zhu and Jin Wang",

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year = "2018",

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doi = "10.1039/c7qi00657h",

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T1 - Cu-enhanced photoelectronic and ethanol sensing properties of Cu2O/Cu nanocrystals prepared by one-step controllable synthesis

AU - Hu, Yao

AU - Ji, Muwei

AU - He, Yiqing

AU - Liu, Ziyi

AU - Yang, Qinghua

AU - Li, Chaozheng

AU - Liu, Jiajia

AU - Li, Bo

AU - Zhang, Jiatao

AU - Zhu, Caizhen

AU - Wang, Jin

PY - 2018/2

Y1 - 2018/2

N2 - Metal nanocrystals are considered as effective components to enhance the photoelectronic properties of semiconductors. Herein, we report the enhancement of the photoelectronic response and photoelectronic catalysis on Cu2O by forming a Cu nanocrystal layer on its surface via a one-step approach. The photocurrent of Cu2O-rich Cu2O/Cu reaches 190 μA cm-2 in the first run and is about 4 times that of pure Cu2O. The cyclic voltammetry (CV) signal for methanol oxidation with Cu2O/Cu gives a higher methanol oxidation peak current than with that with Cu2O when irradiated by ultraviolet-visible light. The ethanol gas sensing performance of Cu2O-rich Cu2O/Cu hetero-nanocrystals is also investigated. It is shown that the sensitivity of the Cu2O-rich Cu2O/Cu hetero-nanocrystals is higher (4.83) than that of Cu2O nanocrystals (3.87) at an ethanol concentration of 2000 ppm.

AB - Metal nanocrystals are considered as effective components to enhance the photoelectronic properties of semiconductors. Herein, we report the enhancement of the photoelectronic response and photoelectronic catalysis on Cu2O by forming a Cu nanocrystal layer on its surface via a one-step approach. The photocurrent of Cu2O-rich Cu2O/Cu reaches 190 μA cm-2 in the first run and is about 4 times that of pure Cu2O. The cyclic voltammetry (CV) signal for methanol oxidation with Cu2O/Cu gives a higher methanol oxidation peak current than with that with Cu2O when irradiated by ultraviolet-visible light. The ethanol gas sensing performance of Cu2O-rich Cu2O/Cu hetero-nanocrystals is also investigated. It is shown that the sensitivity of the Cu2O-rich Cu2O/Cu hetero-nanocrystals is higher (4.83) than that of Cu2O nanocrystals (3.87) at an ethanol concentration of 2000 ppm.

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U2 - 10.1039/c7qi00657h

DO - 10.1039/c7qi00657h

M3 - Article

AN - SCOPUS:85042103961

SN - 2052-1545

VL - 5

SP - 425

EP - 431

JO - Inorganic Chemistry Frontiers

JF - Inorganic Chemistry Frontiers

IS - 2

ER -

Cu-enhanced photoelectronic and ethanol sensing properties of Cu₂O/Cu nanocrystals prepared by one-step controllable synthesis

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