Gas sensing property of ZnO under visible light irradiation at room temperature - Details

author：

Geng, Qiang (Geng, Qiang.) ^[1] | He, Zhoujun (He, Zhoujun.) ^[2] | Chen, Xun (Chen, Xun.) ^[3] (Scholars：陈旬) | Dai, Wenxin (Dai, Wenxin.) ^[4] (Scholars：戴文新) | Wang, Xuxu (Wang, Xuxu.) ^[5] (Scholars：王绪绪)

Indexed by：

EI Scopus SCIE

Abstract：

The　photo-responded　behavior　of　ZnO　and　its　sensing　response　to　ethylene　or　acetone　under　visible-light　irradiation　at　room　temperature　were　reported.　A　ZnO　sensor　without　any　response　to　target　gas　in　the　air　atmosphere　in　dark　at　room　temperature,　exhibits　not　only　a　photo　response　but　also　an　obvious　sensing　response　to　target　gas　in　the　air　atmosphere　under　visible-light　irradiation.　It　is　suggested　that　the　non-intrinsic　photo-absorption　induced　by　the　native　defects　of　ZnO　(i.e.,　the　two-photon　or　multi-photon　excitation　process　via　the　intraband)　may　be　responsible　for　the　photo-responded　behavior　to　the　visible　light.　Moreover,　a　mechanism　model　that　accounts　for　the　solid-state　process　of　photo-carrier　generation/recombination　is　proposed　to　explain　the　photo-induced　gas　sensing　response　of　ZnO　under　visible-light　irradiation.　This　indicates　that　the　photo-activated　gas　sensing　response　property　of　semiconductor　can　be　also　caused　by　its　non-intrinsic　photo-absorption.　(C)　2013　Elsevier　B.V.　All　rights　reserved.

Keyword：

Acetone Ethylene Non-intrinsic absorption Visible-light ZnO

Community：

[ 1 ] [Geng, Qiang]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China
[ 2 ] [He, Zhoujun]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China
[ 3 ] [Chen, Xun]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China
[ 4 ] [Dai, Wenxin]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China
[ 5 ] [Wang, Xuxu]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China

Reprint 's Address：

戴文新
[Dai, Wenxin]Fuzhou Univ, Res Inst Photocatalysis, Fujian Prov Key Lab Photocatalysis, State Key Lab Breeding Base, Fuzhou 350002, Peoples R China

Email：

daiwenxin@fzu.edu.cn |
xwang@fzu.edu.cn

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