Spray Pyrolysis Preparation and Humidity Sensing Characteristics of Spinel Zinc Stannate Thin Films

Stambolova, I.; Konstantinov, Konstantin; Kovacheva, D.; Peshev, P.; Donchev, T.

doi:10.1006/jssc.1996.7174

Cited by 93 publications

(48 citation statements)

References 8 publications

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“…ZnO is a wide band gap material with a direct band gap (3.37 eV) and large exciton binding energy of 60 MeV. Zinc and tin compounds have recently attracted considerable attention because they exhibit technological properties [28], such as high capacity anode material, which can also be used to oxygen separation acting as a photo catalyst under the action of visible light, humidity and gas sensors [29][30][31]. Doping is an attractive and effective method for manipulating different applications of semiconductors.…”

Section: Introductionmentioning

confidence: 99%

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Rama¹,

Yadav²,

Chandkiram³

2011

JST

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In this paper zinc stannate (ZnSnO 3 ) nanoparticles was synthesized by a chemical precipitation method. The synthesized samples were characterized using X-ray powder diffraction (XRD), Differential scanning calorimetry (DSC) and UV-Visible absorption spectroscopy. Sensing material was made as pellet by hydraulic press machine under uniform pressure of 616 MPa. Then the material was annealed at 600˚C. Surface morphologies of the samples were analyzed using Scanning electron microscopy (SEM) for pellet of different weight ratio annealed at 600˚C. The XRD pattern indicates that ZnSnO 3 has a perovskite phase with an orthorhombic structure having minimum crystallite size 4 nm. Further, humidity sensing investigations of these sensing materials were done. Our result indicate that ZnSnO 3 in form of pellet annealed at 600˚C for 1:4 weight ratio was most sensitive of humidity in comparison to pure SnO 2 under same conditions. Maximum sensitivity of the sample was 3 GΩ/% RH which is better in comparison to pure SnO 2 . The results were reproducible up to ± 77% after 2 months of observations.

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Section: Introductionmentioning

confidence: 99%

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Rama¹,

Yadav²,

Chandkiram³

2011

JST

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“…poly (3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) 8 and pure ZnSnO 3 have been used alone in many sensors including humidity sensors. ZnSnO 3 has been used in the sensing of ethanol, 9 H 2 , 10 H 2 S, HCHO, C 2 H 5 OH, 11 and humidity sensing 5,12,13 On the other hand, PEDOT:PSS has also been widely used for sensing of gases 14,15 as well as for humidity sensing.…”

Section: Introductionmentioning

confidence: 99%

Humidity Sensor Based on PEDOT:PSS and Zinc Stannate Nano-composite

Aziz

Chang

Doh

et al. 2015

Journal of Elec Materi

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A composite of poly(3,4-ethylenedioxythiophene) polystyrene sulfonate (PEDOT:PSS) and zinc stannate (ZnSnO 3 ) has been introduced for impedancebased humidity sensing, owing to its high sensitivity, good stability, very fast response ($0.2 s) and recovery time ($0.2 s), small hysteresis, repeatability, low-cost fabrication and wide range of sensitivity. Both materials were mixed in three different weight percentage ratios, to optimize the performance of the sensors. Best response was observed for 5 wt.% PEDOT:PSS and 5 wt.% ZnSnO 3 . The impedance of the sensor was dropped immensely from 1.5 MX to 50 kX by changing relative humidity from 0% to 90%. The reason for this improvement in sensitivity was analyzed by virtue of sensing mechanisms and different characterizations (three dimensional (3D) nano-profiler, optical microscope, and fourier transform infra-red (FTIR) spectroscopy) revealing the surface morphology and chemical structure of the film. Due to its response and ability to sense human breath and skin humidity, it is suitable for environmental, artificial skin and food industry applications.

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“…Semiconductor oxide materials such as ZnO, CuO, TiO 2 , Al 2 O 3 , SnO 2 , ZrO 2 and WO 3 are attractive photocatalysts because they are not only environmentally sustainable but also high catalytic efficiency in degradation of various environmental pollutants such as pesticides, detergents, dyes and volatile organic compounds [2][3][4][5]. Ternary semiconductor oxides Zn 2 SnO 4 (ZTO) is known for owning high-electron mobility, high-electrical conductivity, low visible absorption and attractive optical properties, which makes it suitable for applications in solar cell [6], gas sensor (detecting humidity and various combustible gases) [7,8], photoluminescence, negative electrode of Li-ion battery [9,10] and photocatalysis (degrading organic pollutants) [11][12][13].…”

Section: Introductionmentioning

confidence: 99%

Electrochemical Generation of Cubic Shaped Nano Zn2SnO4 Photocatalysts

2013

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Abstract:In this contribution, an efficient and simple two-step hybrid electrochemical-thermal route was developed for the synthesis of cubic shaped Zn2SnO4 (ZTO) nanoparticles using aqueous sodium bicarbonate (NaHCO3) and sodium stannate (Na2SnO3) electrolyte. The sacrificial Zn was used as anode and cathode in an undivided cell under galvanostatic mode at room temperature. The bath concentration and current density were respectively varied from 30 to 120 mmol and 0.05 to 1.5 A/dm 2 . The electrochemically generated precursor was calcined for an hour at different range of temperature from 60 to 600℃. The crystallite sizes in the range of 24-53 nm were calculated based on Debye-Scherrer equation. Scanning electron microscope and transmission electron microscopy results reveal that all the particles have cubic morphology with diameter of 40-50 nm. The as-prepared ZTO samples showed higher catalytic activity towards the degradation of methylene blue (MB) dye, and 90% degradation was found for the sample calcined at 600℃, which is greater than that of commercial TiO2-P25 photocatalysts. The photodegradation efficiency of ZTO samples was found to be a function of exposure time and the dye solution pH value. These results indicate that the ZTO nanoparticles may be employed to remove dyes from wastewater.

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Spray Pyrolysis Preparation and Humidity Sensing Characteristics of Spinel Zinc Stannate Thin Films

Cited by 93 publications

References 8 publications

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Humidity Sensor Based on PEDOT:PSS and Zinc Stannate Nano-composite

Electrochemical Generation of Cubic Shaped Nano Zn2SnO4 Photocatalysts

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Spray Pyrolysis Preparation and Humidity Sensing Characteristics of Spinel Zinc Stannate Thin Films

Cited by 93 publications

References 8 publications

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO&lt;sub&gt;3&lt;/sub&gt;

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO&lt;sub&gt;3&lt;/sub&gt;

Humidity Sensor Based on PEDOT:PSS and Zinc Stannate Nano-composite

Electrochemical Generation of Cubic Shaped Nano Zn2SnO4 Photocatalysts

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Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>

Synthesis and Humidity Sensing Investigations of Nanostructured ZnSnO<sub>3</sub>