Open AccessElectrical and sensitivity properties of ZnO/TiO2 heterojunction nanocomposites for ammonia gas sensor
Author(s) -
Pitchanunt Chaiyo,
C. Makhachan,
Jeerapat Nutariya,
O. Thiabgoh,
Supon Sumran,
Supakorn Pukird
Publication year - 2019
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1259/1/012005
Subject(s) - nanocomposite , materials science , heterojunction , ohmic contact , anatase , rutile , nanoparticle , chemical engineering , nanotechnology , ammonia , photocatalysis , optoelectronics , chemistry , catalysis , biochemistry , organic chemistry , layer (electronics) , engineering
The ZnO/TiO 2 heterojunction nanocomposites were synthesized via a thermal process. The morphology of the samples showed TiO 2 nanoparticles with rang of 50 – 100 nm in diameter and ZnO nanoparticles with size of upper than 100 nm. The XRD patterns of ZnO/TiO 2 nanocomposites indicate ZnO, anatase, and rutile phases. The current - voltage characteristics of ZnO and TiO 2 nanoparticles, and ZnO/TiO 2 heterojunction nanocomposites show behaviour of ohmic contact materials. The material sensitivity was measured under an ammonia atmosphere for 200 seconds at room temperature. The results showed maximum response of ZnO/TiO 2 nanoparticles with 27.30 for 200 seconds.