Study of WO3-In2O3 nanocomposites for highly sensitive ENCO and NO2 gas sensors

被引：57

作者：

Haiduk, Yu. S. ^{[1
]}

Khort, A. A. ^{[2
,3
]}

Lapchuk, N. M. ^{[1
]}

Savitsky, A. A. ^{[1
]}

机构：

[1] Belarusian State Univ, Minsk 220030, BELARUS

[2] Natl Acad Sci Belarus, AV Luikov Heat & Mass Transfer Inst, Minsk 220072, BELARUS

[3] Natl Univ Sci & Technol MISIS, Ctr Funct Nanoceram, Moscow 119049, Russia

来源：

JOURNAL OF SOLID STATE CHEMISTRY | 2019年 / 273卷

关键词：

WO3; In2O3; Sol-gel; Semiconductor gas-sensors; CO; NO2; IN2O3; NANOPARTICLES; SENSING PERFORMANCE; THIN-FILMS; WO3; NANOSTRUCTURES; ENHANCEMENT; TEMPERATURE;

D O I：

10.1016/j.jssc.2019.02.023

中图分类号：

O61 [无机化学];

学科分类号：

070301 ; 081704 ;

摘要：

Pure semiconductor tungsten oxide (WO3), indium oxide (In2O3) and mixed nanocomposites with different WO3 to In2O3 ratios were successfully synthesized by simple sol-gel method following calcination at 600 degrees C. The morphology, phase composition and features of crustal structure of the materials were studied by X-ray diffraction, Fourier-transform infrared spectroscopy, scanning electron microscopy, transition electron microscopy and electron paramagnetic resonance spectroscopy. It was found that the nanocomposite materials are characterized by fine crystallinity of 8-38 nm, highly defective crystal cells and presence of delocalized electrons in their structures, which can significantly affect gas sensitivity. The gas sensors based on WO3-In2O3 composite structures exhibited excellent CO and NO2 detecting performance at optimal operating temperature of similar to 240 degrees C and similar to 140 degrees C, respectively.

引用

页码：25 / 31

页数：7

共 36 条

[31] In situ formation of Au/SnO2 nanocrystals on WO3 nanoplates as excellent gas-sensing materials for H2S detection [J].