Gas-sensing properties of composites of Y-zeolite and SnO2
- 408 Downloads
Y-zeolite was first modified by means of ions exchange with Al, Ca and Na, respectively. The modified materials were characterized by using X-ray diffraction (XRD), scanning electron microscopy (SEM) and inductively coupled plasma optical emission spectrometry (ICP-OES). Gas sensors were fabricated by SnO2 and coating Y-zeolites on the outside of SnO2 surface, respectively. It was found that the responses of the composites of all types of zeolite- and SnO2-based sensors became lower comparing with that of the pure SnO2-based one response of SnO2 sensor to ethanol vapor. It indicates a suppression effect of zeolites on the response to ethanol vapor. In contrast, the response of the composite-sensing materials of the modified Y-zeolite/SnO2-based sensors except the Ca-modified one to acetone indicates a significantly improved response, 2–3 times higher than that of pure SnO2-based sensor which is smaller than the one of SnO2 sensor. The possible mechanism of the effects of the Y-zeolites on the response of the sensors has been discussed.
The authors thank the National Natural Science Foundation of China (61574025, 61474012 and 51602035) for financial support. The authors also thank Mr. Liu Xuanzhou for his help in the experiments.
- 3.Tokumura M, Nakajima R, Znad HT, Kawase Y (2008) Chemical absorption process for degradation of VOC gas using heterogeneous gas–liquid photocatalytic oxidation: toluene degradation by photo-Fenton reaction. Chemosphere 73(5):768–775. https://doi.org/10.1016/j.chemosphere.2008.06.021 CrossRefGoogle Scholar
- 9.Leite ER, Weber IT, Longo E, Varela JA (2000) A new method to control particle size and particle size distribution of SnO2 nanoparticles for gas sensor applications. Adv Mater 12(13):965–968. https://doi.org/10.1002/1521-4095(200006)12:13<965::aid-adma965>3.0.co;2-7
- 18.Jadsadapattarakul D, Thanachayanont C, Nukeaw J, Sooknoi T (2010) Improved selectivity, response time and recovery time by [0 1 0] highly preferred-orientation silicalite-1 layer coated on SnO2 thin film sensor for selective ethylene gas detection. Sens Actuators B Chem 144(1):73–80. https://doi.org/10.1016/j.snb.2009.10.035 CrossRefGoogle Scholar
- 33.Lisnawati E, Krisnandi YK, Triyono D, Aip (2017) Modification of hybrid NaY/ZSM-5/IDC zeolite composite with exchanged Cu2+ and its application as ammonia gas sensor. In: International conference on chemistry, chemical process and engineering, vol 1823. AIP Conference Proceedings. https://doi.org/10.1063/1.4978169
- 37.Shao Q, Huang LL, Zhou J, Lu LH, Zhang LZ, Lu XH, Jiang SY, Gubbins KE, Zhu YD, Shen WF (2007) Molecular dynamics study on diameter effect in structure of ethanol molecules confined in single-walled carbon nanotubes. J Phys Chem C 111(43):15677–15685. https://doi.org/10.1021/jp0736140 CrossRefGoogle Scholar