UV-enhanced room temperature gas sensor based on hollow sphere SnO2-TiO2

Author

Sun, J.B. ; Xu, J. ; Yu, Y.S. ; Guan, Y. ; Liu, F.M. ; Lu, G.Y.

Author_Institution

State Key Lab. on Integrated Optoelectron., Jilin Univ. Region, Jilin, China

fYear

2011

fDate

5-9 June 2011

Firstpage

158

Lastpage

161

Abstract

Sensing characteristics of the UV-enhanced gas sensor using the SnO₂-TiO₂ hollow sphere (HS SnO₂-TiO₂) at room temperature has been investigated. HS SnO₂-TiO₂ was prepared by coating the TiO₂ on the outer- and inner-surfaces of HS SnO₂ with hydrolysisof the titanium tetrachloride. HS SnO₂ was synthesized by chemically induced self-assembly under hydrothermal condition. The morphology, crystalline structure and optical absorptivity of the HS SnO₂-TiO₂ were measured by means of X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM) and UV-Vis absorption spectra. A sensing mechanism related to the SnO₂-TiO₂ heterojunction as well as UV illumination was proposed.

Keywords

X-ray diffraction; field emission electron microscopy; gas sensors; scanning electron microscopy; tin compounds; titanium compounds; transmission electron microscopy; FESEM; SnO₂-TiO₂; UV illumination; UV-enhanced room temperature gas sensor; X-ray diffraction; XRD; crystalline structure; field emission scanning electron microscopy; hydrolysisof; hydrothermal condition; optical absorptivity; room temperature; titanium tetrachloride; transmission electron microscopy; Lead; Lighting; Optical diffraction; Optical films; Optical imaging; Optical sensors; Sensitivity; (UV) light; gas sensor; heterojunction; hollow sphere; room temperature;

fLanguage

English

Publisher

ieee

Conference_Titel

Solid-State Sensors, Actuators and Microsystems Conference (TRANSDUCERS), 2011 16th International

Conference_Location

Beijing

ISSN

Pending

Print_ISBN

978-1-4577-0157-3

Type

conf

DOI

10.1109/TRANSDUCERS.2011.5969256

Filename

5969256