Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications

Prabhakar Rai, Seung Ho Jeon, Chung Hyun Lee, Jong Heun Lee, Yeon Tae Yu

Research output: Contribution to journalArticle

36 Citations (Scopus)

Abstract

This study reports the functionalization of ZnO nanorods (NRs) through spike-shaped CuO nanoparticles (NPs) to create a nanosized p-n junction, their structural properties, and the mechanism by which bundles of these NRs are able to sense CO gas. The CuO NPs were deposited on solvothermally grown ZnO NRs by a chemical bath deposition method. The formation of the highly crystalline heterogeneous nanostructure of the ZnO NRs was confirmed by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the p-n junction on CO sensing behavior of ZnO NRs was evaluated in dry air. The response of ZnO NRs sensors to CO was enhanced after loading with CuO NPs. The role of catalyst NPs is explained by both a collective- and a local-site approach, in which deposition of catalyst NPs changed the overall band structure and surface chemistry of the ZnO matrix.

Original languageEnglish
Pages (from-to)23604-23609
Number of pages6
JournalRSC Advances
Volume4
Issue number45
DOIs
Publication statusPublished - 2014 Jan 1

Fingerprint

Chemical sensors
Nanorods
Nanoparticles
Carbon Monoxide
Catalysts
Surface chemistry
Band structure
Electron microscopy
Structural properties
Nanostructures
X ray photoelectron spectroscopy
Gases
Crystalline materials
X ray diffraction
Sensors
Air

ASJC Scopus subject areas

  • Chemical Engineering(all)
  • Chemistry(all)

Cite this

Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications. / Rai, Prabhakar; Jeon, Seung Ho; Lee, Chung Hyun; Lee, Jong Heun; Yu, Yeon Tae.

In: RSC Advances, Vol. 4, No. 45, 01.01.2014, p. 23604-23609.

Research output: Contribution to journalArticle

Rai, Prabhakar ; Jeon, Seung Ho ; Lee, Chung Hyun ; Lee, Jong Heun ; Yu, Yeon Tae. / Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications. In: RSC Advances. 2014 ; Vol. 4, No. 45. pp. 23604-23609.
@article{ab722c7dac994171b573cc463f3f38fa,
title = "Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications",
abstract = "This study reports the functionalization of ZnO nanorods (NRs) through spike-shaped CuO nanoparticles (NPs) to create a nanosized p-n junction, their structural properties, and the mechanism by which bundles of these NRs are able to sense CO gas. The CuO NPs were deposited on solvothermally grown ZnO NRs by a chemical bath deposition method. The formation of the highly crystalline heterogeneous nanostructure of the ZnO NRs was confirmed by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the p-n junction on CO sensing behavior of ZnO NRs was evaluated in dry air. The response of ZnO NRs sensors to CO was enhanced after loading with CuO NPs. The role of catalyst NPs is explained by both a collective- and a local-site approach, in which deposition of catalyst NPs changed the overall band structure and surface chemistry of the ZnO matrix.",
author = "Prabhakar Rai and Jeon, {Seung Ho} and Lee, {Chung Hyun} and Lee, {Jong Heun} and Yu, {Yeon Tae}",
year = "2014",
month = "1",
day = "1",
doi = "10.1039/c4ra00078a",
language = "English",
volume = "4",
pages = "23604--23609",
journal = "RSC Advances",
issn = "2046-2069",
publisher = "Royal Society of Chemistry",
number = "45",

}

TY - JOUR

T1 - Functionalization of ZnO nanorods by CuO nanospikes for gas sensor applications

AU - Rai, Prabhakar

AU - Jeon, Seung Ho

AU - Lee, Chung Hyun

AU - Lee, Jong Heun

AU - Yu, Yeon Tae

PY - 2014/1/1

Y1 - 2014/1/1

N2 - This study reports the functionalization of ZnO nanorods (NRs) through spike-shaped CuO nanoparticles (NPs) to create a nanosized p-n junction, their structural properties, and the mechanism by which bundles of these NRs are able to sense CO gas. The CuO NPs were deposited on solvothermally grown ZnO NRs by a chemical bath deposition method. The formation of the highly crystalline heterogeneous nanostructure of the ZnO NRs was confirmed by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the p-n junction on CO sensing behavior of ZnO NRs was evaluated in dry air. The response of ZnO NRs sensors to CO was enhanced after loading with CuO NPs. The role of catalyst NPs is explained by both a collective- and a local-site approach, in which deposition of catalyst NPs changed the overall band structure and surface chemistry of the ZnO matrix.

AB - This study reports the functionalization of ZnO nanorods (NRs) through spike-shaped CuO nanoparticles (NPs) to create a nanosized p-n junction, their structural properties, and the mechanism by which bundles of these NRs are able to sense CO gas. The CuO NPs were deposited on solvothermally grown ZnO NRs by a chemical bath deposition method. The formation of the highly crystalline heterogeneous nanostructure of the ZnO NRs was confirmed by electron microscopy, X-ray diffraction, and X-ray photoelectron spectroscopy. The effect of the p-n junction on CO sensing behavior of ZnO NRs was evaluated in dry air. The response of ZnO NRs sensors to CO was enhanced after loading with CuO NPs. The role of catalyst NPs is explained by both a collective- and a local-site approach, in which deposition of catalyst NPs changed the overall band structure and surface chemistry of the ZnO matrix.

UR - http://www.scopus.com/inward/record.url?scp=84902439118&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84902439118&partnerID=8YFLogxK

U2 - 10.1039/c4ra00078a

DO - 10.1039/c4ra00078a

M3 - Article

VL - 4

SP - 23604

EP - 23609

JO - RSC Advances

JF - RSC Advances

SN - 2046-2069

IS - 45

ER -