Nanoparticles Assembled CdIn2O4 Spheres with High Sensing Properties towards n-Butanol.

Weiping Liu,Ruijian Wang,Zhaofeng Wang,Ximing Zhang,Chen Chen,Chengjun Dong

doi:10.3390/nano9121714

Abstract

Cd/In-glycerate spheres are synthesized through a simple solvothermal method. After thermal treatment, these Cd/In-glycerates can be converted into CdIn2O4 spheres. Many characterization methods were performed to reveal the microstructure and morphology of the CdIn2O4. It was found that pure CdIn2O4 phase was obtained for the Cd/In starting materials at ratios of 1:1.6. The CdIn2O4 spheres are composed by a large number of nanoparticles subunits. The CdIn2O4 sphere-based sensor exhibited a low detection limit (1 ppm), high response (81.20 to 500 ppm n-butanol), fast response (4 s) and recovery (10 s) time, good selectivity, excellent repeatability, and stability at 280 °C. Our findings highlight the possibility to develop a novel gas sensor based on CdIn2O4 for application in n-butanol detection with high performance.

Highlights

With the rapid development of society and progress in industry, the increasing air pollution is becoming an urgent global problem [1,2]
Explosion or fire may occur if 1.45–11.25% n-butanol is mixed in air when the temperature is higher than its flash point of 35 ◦C
Several monitoring methods have been reported for n-butanol detection, in which metal oxide semiconductors such as SnO2 [8], ZnO [9], WO3 [10], Fe2O3 [6], and their hybrid-based gas sensors [11,12,13] have drawn considerable attention because of their advantages of sensing properties and low cost

Summary

Introduction

With the rapid development of society and progress in industry, the increasing air pollution is becoming an urgent global problem [1,2]. As a typical kind of VOC, n-butanol (CH3(CH2)3OH) is an excellent solvent, organic synthesis raw material, and intermediate as well as an extracting agent, and is widely used in laboratories and industry [5]. It is highly necessary to effectively detect n-butanol in laboratory and factory settings with fast speed and excellent selectivity. Several monitoring methods have been reported for n-butanol detection, in which metal oxide semiconductors such as SnO2 [8], ZnO [9], WO3 [10], Fe2O3 [6], and their hybrid-based gas sensors [11,12,13] have drawn considerable attention because of their advantages of sensing properties and low cost. It is still necessary to develop an n-butanol gas sensor based on novel sensing materials

Methods

Results

Conclusion