Enhancement of gas sensing properties of CdS Nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation

Jiali Zhai; Lingling Wang; Dejun Wang; Haiyan Li; Yu Zhang; Dong Qing He; Tengfeng Xie

doi:10.1021/am200008y

Enhancement of gas sensing properties of CdS Nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation

Jiali Zhai
, Lingling Wang
, Dejun Wang
, Haiyan Li
, Yu Zhang
, Dong Qing He
, Tengfeng Xie^*

^*Corresponding author for this work

Jilin University

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

105 Scopus citations

Abstract

CdS nanowire/ZnO nanosphere materials (CdS/ZnO) with hierarchical structure were synthesized by a three-step solvothermal process. XRD, FESEM and TEM analysis confirmed the growth of ZnO nanospheres on the surface of CdS nanowires (NWs). The transient photovoltage (TPV) measurements revealed that the interface between CdS and ZnO can inhibit the recombination of photogenerated excess carriers and prolong the lifetime of excess carriers in CdS/ZnO materials. Moreover, the CdS/ZnO materials exhibit a dramatic improvement in optoelectronic performance and visible-light-irradiation gas sensing activity, which gave 1 order of magnitude larger than that of CdS NWs in response to formaldehyde. The enhancement of sensing properties is attributed to the interfacial transport of excess carriers.

Original language	English
Pages (from-to)	2253-2258
Number of pages	6
Journal	ACS Applied Materials and Interfaces
Volume	3
Issue number	7
DOIs	https://doi.org/10.1021/am200008y
State	Published - 27 Jul 2011
Externally published	Yes

Keywords

gas sensing
hierarchical structure
interface
visible-light irradiation

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10.1021/am200008y

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title = "Enhancement of gas sensing properties of CdS Nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation",

abstract = "CdS nanowire/ZnO nanosphere materials (CdS/ZnO) with hierarchical structure were synthesized by a three-step solvothermal process. XRD, FESEM and TEM analysis confirmed the growth of ZnO nanospheres on the surface of CdS nanowires (NWs). The transient photovoltage (TPV) measurements revealed that the interface between CdS and ZnO can inhibit the recombination of photogenerated excess carriers and prolong the lifetime of excess carriers in CdS/ZnO materials. Moreover, the CdS/ZnO materials exhibit a dramatic improvement in optoelectronic performance and visible-light-irradiation gas sensing activity, which gave 1 order of magnitude larger than that of CdS NWs in response to formaldehyde. The enhancement of sensing properties is attributed to the interfacial transport of excess carriers.",

keywords = "gas sensing, hierarchical structure, interface, visible-light irradiation",

author = "Jiali Zhai and Lingling Wang and Dejun Wang and Haiyan Li and Yu Zhang and He, \{Dong Qing\} and Tengfeng Xie",

year = "2011",

month = jul,

day = "27",

doi = "10.1021/am200008y",

language = "英语",

volume = "3",

pages = "2253--2258",

journal = "ACS Applied Materials and Interfaces",

issn = "1944-8244",

publisher = "American Chemical Society",

number = "7",

}

TY - JOUR

T1 - Enhancement of gas sensing properties of CdS Nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation

AU - Zhai, Jiali

AU - Wang, Lingling

AU - Wang, Dejun

AU - Li, Haiyan

AU - Zhang, Yu

AU - He, Dong Qing

AU - Xie, Tengfeng

PY - 2011/7/27

Y1 - 2011/7/27

N2 - CdS nanowire/ZnO nanosphere materials (CdS/ZnO) with hierarchical structure were synthesized by a three-step solvothermal process. XRD, FESEM and TEM analysis confirmed the growth of ZnO nanospheres on the surface of CdS nanowires (NWs). The transient photovoltage (TPV) measurements revealed that the interface between CdS and ZnO can inhibit the recombination of photogenerated excess carriers and prolong the lifetime of excess carriers in CdS/ZnO materials. Moreover, the CdS/ZnO materials exhibit a dramatic improvement in optoelectronic performance and visible-light-irradiation gas sensing activity, which gave 1 order of magnitude larger than that of CdS NWs in response to formaldehyde. The enhancement of sensing properties is attributed to the interfacial transport of excess carriers.

AB - CdS nanowire/ZnO nanosphere materials (CdS/ZnO) with hierarchical structure were synthesized by a three-step solvothermal process. XRD, FESEM and TEM analysis confirmed the growth of ZnO nanospheres on the surface of CdS nanowires (NWs). The transient photovoltage (TPV) measurements revealed that the interface between CdS and ZnO can inhibit the recombination of photogenerated excess carriers and prolong the lifetime of excess carriers in CdS/ZnO materials. Moreover, the CdS/ZnO materials exhibit a dramatic improvement in optoelectronic performance and visible-light-irradiation gas sensing activity, which gave 1 order of magnitude larger than that of CdS NWs in response to formaldehyde. The enhancement of sensing properties is attributed to the interfacial transport of excess carriers.

KW - gas sensing

KW - hierarchical structure

KW - interface

KW - visible-light irradiation

UR - https://www.scopus.com/pages/publications/80053217373

U2 - 10.1021/am200008y

DO - 10.1021/am200008y

M3 - 文章

AN - SCOPUS:80053217373

SN - 1944-8244

VL - 3

SP - 2253

EP - 2258

JO - ACS Applied Materials and Interfaces

JF - ACS Applied Materials and Interfaces

IS - 7

ER -

Enhancement of gas sensing properties of CdS Nanowire/ZnO nanosphere composite materials at room temperature by visible-light activation

Abstract

Keywords

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