Siam Physics Congress 2018

Effects of Yttrium Doping on Acetone Sensing Properties of Flame-spray-made SnO2 Nanoparticles

22 May 2018, 15:00

1h

Ayutthaya Room

Poster Material Physics and Functional Materials A013: Materials Physics (Poster)

Speaker

Saowalak Homnan

Description

Saowalak Homnan${}^1$${}^{,}$${}^a$, Anurat Wisitsoraat${}^2$${}^{,}$${}^3$${}^{,}$${}^b$, Adisorn Tuantranont${}^2$${}^{,}$${}^4$${}^{,}$${}^c$, Sukon Phanichphant${}^2$${}^{,}$${}^d$, Chaikarn Liewhiran${}^1$${}^{,}$${}^2$${}^{,}$${}^5$${}^{\ast }$
${}^1$Department of Physics and Materials Science, Faculty of Science, Chiang Mai University,Chiang Mai 50200, Thailand
${}^2$Center of Advanced Materials for Printed Electronics and Sensors, Materials Science Research Center, Faculty of Science, Chiang Mai University, Chiang Mai 50200, Thailand
${}^3$Carbon-based Devices and Nanoelectronics Laboratory, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Klong Luang, Pathumthani 12120, Thailand
${}^4$Thailand Organic and Printed Electronics Innovation Center, National Electronics and Computer Technology Center, National Science and Technology Development Agency, Klong Luang, Pathumthani 12120, Thailand
${}^5$Center of Excellence in Materials Science and Technology, Chiang Mai University, Chiang Mai 50200, Thailand
${}^a$ppsaowalak.h@gmail.com,${}^b$anuratwisit@hotmail.com,${}^c$adisorn.tuantranont@gmail.com,${}^d$sphanichphant@gmail.com
${}^{\ast }$ Corresponding author’s e-mail address: cliewhiran@gmail.com (C. Liewhiran)

Abstract. In the present study, gas-sensing properties of flame-spray-made 0-2 wt% Y${}_2$O${}_3$-doped SnO${}_2$ nanoparticles are systematically and selectively studied for detection of acetone (C${}_3$H${}_6$O) which practically occurred in specific applications. Structural characterizations by electron microscopy, X-ray analysis and nitrogen adsorption further confirmed the formation of loosely agglomerated SnO${}_2$ nanoparticles (5-15 nm) with high specific surface area and highly crystalline tetragonal-cassiterite SnO${}_2$ structure doped with Y${}^3$${}^{+}$oxidation states. The gas-sensing properties of undoped SnO${}_2$ and Y${}_2$O${}_3$-doped SnO${}_2$ sensors were systematically tested towards C${}_3$H${}_6$O under atmospheric conditions at the working temperature ranging from 200-350°C. Tested results indicated that the optimal 0.2 wt% Y${}_2$O${}_3$-doped SnO${}_2$ exhibited high responses of ∼322 to 400 ppm acetone under exposure at working temperature of 350°C in dry air compared with undoped one. Moreover, the optimal Y${}_2$O${}_3$-doped SnO${}_2$ sensors evidently displayed high selectivity against various gas/vapor categories including flammable gases, toxic gas and VOCs. Therefore, Y${}_2$O${}_3$-doped SnO${}_2$ sensors are potential for responsive detections of C${}_3$H${}_6$O at ppm-level but with limited selectivity and may be useful for environmental and biomedical applications.

Keywords : n-type Y/SnO${}_2$, Nanoparticles, Acetone, Acetylene, Sensor.