Abstract
We report on novel, sensitive, selective and low-temperature hydrogen sulfide (H2S) gas sensors based on metal-oxide nanoparticles incorporated within polymeric matrix composites. The Copper-Oxide (CuO) nanoparticles were prepared by a colloid microwave-assisted hydrothermal method that enables precise control of nanoparticle size. The sodium carboxymethyl cellulose (CMC) powder with 5% glycerol ionic liquid (IL) was prepared and mixed with different concentrations of CuO NPs (2.5–7.5 wt.%) to produce flexible and semi-conductive polymeric matrix membranes. Each membrane was then sandwiched between a pair of electrodes to produce an H2S gas sensor. The temperature-dependent gas sensing characteristics of the prepared sensors were investigated over the temperature ranges from 40 °C to 80 °C. The sensors exhibited high sensitivity and reasonably fast responses to H2S gas at low working temperatures and at a low gas concentration of 15 ppm. Moreover, the sensors were highly selective to H2S gas, and they showed low humidity dependence, which indicates reliable functioning in humid atmospheres. This organic-inorganic hybrid-materials gas sensor is flexible, with good sensitivity and low power consumption has the potential to be used in harsh environments.
Highlights
We report on novel, sensitive, selective and low-temperature hydrogen sulfide (H2S) gas sensors based on metal-oxide nanoparticles incorporated within polymeric matrix composites
Fabrication of electronic devices based on organic materials and inorganic nanomaterials has been intensively studied because they enable applications, such as transparent and flexible electronic devices, which are power saving, size compactable, and portable[18,19,20]
The X-ray diffraction (XRD) peaks of the sample were indexed according to JCPDS card No
Summary
Sensitive, selective and low-temperature hydrogen sulfide (H2S) gas sensors based on metal-oxide nanoparticles incorporated within polymeric matrix composites. Metal-oxide semiconducting nanoparticles based sensors are the most promising materials for the H2S gas detection; they are cost-effective, easy to operate and fast in response with high sensitivity to the target gas[14,15]. The development of new sensors that include polymer membranes and metal-oxide nanoparticles (organic-inorganic sensors) is expected to enhance the functionalities of such sensors; as they are flexible, easy to fabricate, and can be operated at low temperature with a low electrical power requirement[14,15,16].
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