Chemoresistive properties of photo-activated thin and thick ZnO films

Fabbri, Barbara; Gaiardo, Andrea; Giberti, A; Guidi, V.; Malagù, C.; Martucci, Alessandro; Sturaro, Marco; Zonta, Giulia; Gherardi, S.; Bernardoni, Paolo

doi:10.1016/j.snb.2015.06.048

Cited by 46 publications

(42 citation statements)

References 32 publications

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“…UV light irradiation results in an increase in the response signal, enhanced sensing reversibility, and an enhanced recovery rate. Such effects were observed for both oxidizing and reducing gases 13 17 18 19 20 23 . The wavelength and intensity of UV have been also examined in earlier reports 16 18 22 24 .…”

mentioning

confidence: 91%

“…Several studies on photo-activated metal oxide gas sensors at RT have been reported. The common oxide sensor materials, such as ZnO 1 16 17 18 19 , SnO 2 15 20 21 22 , TiO 2 23 24 , WO 3 25 , and In 2 O 3 20 26 , have been extensively investigated for RT operation under the illumination of light. UV light irradiation results in an increase in the response signal, enhanced sensing reversibility, and an enhanced recovery rate.…”

mentioning

confidence: 99%

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NO gas sensing kinetics at room temperature under UV light irradiation of In2O3 nanostructures

Chinh

Quang

Lee

et al. 2016

Sci Rep

110

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In2O3 nanostructure sensors were fabricated by arc-discharging a source composed of a graphite tube containing indium. The NO gas sensing properties, as well as the morphology, structure, and electrical properties, were examined at room temperature under UV light illumination. In particular, the response and recovery kinetics of the sensor at room temperature under various UV light intensities were studied. The maximum response signal was observed at an intermediate UV light intensity, which could be corroborated by a nano-size effect based on the conduction model of a resistive chemical nano sensor. The mechanism for the enhanced adsorption/desorption kinetics for NO in an air environment under UV light irradiation is discussed in detail. Furthermore, the general requirements of the sensor, including the stability, repeatability, and selectivity, are discussed.

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mentioning

confidence: 91%

mentioning

confidence: 99%

NO gas sensing kinetics at room temperature under UV light irradiation of In2O3 nanostructures

Chinh

Quang

Lee

et al. 2016

Sci Rep

110

View full text Add to dashboard Cite

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“…The high surface area also provides more adsorbing area for film contaminants. The ZnO nanostructures/films have been used in different application areas such as, Sensor (Fabbri et al 2016;Öztürk et al 2016;Yoo et al 2015;Vanalakar et al 2015), UV Detector (Shewale and Yu 2016), UV Laser (Wang and Su 2016), Light-Emitting Diode (Wang and Su 2016), Dye-Sensitized Solar Cells (Rahman et al 2015), Field Effect Transistor (Zulkifli, Kalita, Tanemura 2015), Photoelectrochemical application (Ge et al 2015), Electrocatalysis , Photocatalysis (Bechambi et al 2015;Bu 2015;Kaneva, Dimitrov, and Dushkin 2011;Khataee et al 2015;Xu et al 2012;Zhang et al 2012) due to the unique electrical, optical, and mechanical properties. Although ZnO has a wide range of application areas, its photocatalytic performance is has drawn much attention for wastewater treatment and clean energy production.…”

Section: Introductionmentioning

confidence: 99%

Electrochemical production of ZnO and ZnO@Ag core-shell nanorods on ITO substrate and their photocatalytic and photoelectrochemical performance

Haspulat-Taymaz¹,

Kamış²,

Duyar-Karakuş³

2019

Bilge International Journal of Science and Technology Research

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Zinc oxide (ZnO) and Ag deposited ZnO (ZnO@Ag) core-shell nanorods produced electrochemically on indium tin oxide coated glass (ITO) substrate for the first time without any organic surfactants or high annealing temperature. Nanorod films were synthesized two-step synthesis procedure. Firstly, ZnO nanorods electrodeposited at low temperature, in second step, in situ electrochemically etching of deposited ZnO nanorod was carried out. Characterizations of electrochemically produced films have been carried by using morphologic, spectroscopic and structural analysis methods by using X-ray diffraction (XRD), scanning electron microscope (SEM), atomic force microscope (AFM), fourier transform infrared spectroscopy (FTIR), Elemental mapping, UV-visible diffuse absorption spectra and photoluminesance spectroscopy (PL). The photocatalytic performance of the obtained films was determined by degradation of methylene blue and malachite green dyes under UV light illumination. Methylene blue and malachite green dyes completely degraded under UV light irradiation after 150 and 180 min, respectively. Also, photoelectrochemical (PEC; water splitting) performances of the produced films were investigated under dark conditions and UV light irradiation. The ZnO@Ag core-shell nanorods exhibited higher photocatalytic and photoelectrochemical performance in comparison with unmodified ZnO nanorods film. The nanorods grown on the ITO substrates showed very good photocatalytic activity and became reusable without significant loss of activity.

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“…Several designs of sensors' construction were proposed for achieving the selectivity of these sensors, such as directly doping small amounts of noble metals (Au, Pd, and Pt), a suitable filter containing the noble metal catalysts method, and nano-carbon-based composite materials film [3][4][5][6]. ZnO and TiO 2 are well known inorganic photocatalysts, so that ultra-violet (UV) irradiation has been used to reduce the operating temperature of these sensors [7][8][9][10]. ZnO-TiO 2 binary oxide systems have a better photocatalytic performance than single systems [11].…”

Section: Introductionmentioning

confidence: 99%

Preparation and NH3 Gas-Sensing Properties of Double-Shelled Hollow ZnTiO3 Microrods

Liu

2019

Sensors

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A novel double-shelled hollow (DSH) structure of ZnTiO3 microrods was prepared by self-templating route with the assistance of poly(diallyldimethylammonium chloride) (PDDA) in an ethylene glycol (EG) solution, which was followed by calcining. Moreover, the NH3 gas-sensing properties of the DSH ZnTiO3 microrods were studied at room temperature. The morphology and composition of DSH ZnTiO3 microrods films were analyzed using scanning electron microscopy (SEM), transmission electron microscopy (TEM) and X-ray diffractometry (XRD). The formation process of double-shelled hollow microrods was discussed in detail. The comparative gas-sensing results revealed that the DSH ZnTiO3 microrods had a higher response to NH3 gas at room temperature than those of the TiO2 solid microrods and DSH ZnTiO3 microrods did in the dark. More importantly, the DSH ZnTiO3 microrods exhibited a strong response to low concentrations of NH3 gas at room temperature.

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Chemoresistive properties of photo-activated thin and thick ZnO films

Cited by 46 publications

References 32 publications

NO gas sensing kinetics at room temperature under UV light irradiation of In2O3 nanostructures

NO gas sensing kinetics at room temperature under UV light irradiation of In2O3 nanostructures

Electrochemical production of ZnO and ZnO@Ag core-shell nanorods on ITO substrate and their photocatalytic and photoelectrochemical performance

Preparation and NH3 Gas-Sensing Properties of Double-Shelled Hollow ZnTiO3 Microrods

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