Highly sensitive and selective ethanol sensor based on Sm2O3-loaded flower-like ZnO nanostructure

Bagheri, Minoo; Hamedani, Naghmeh Faal; Mahjoub, Ali Reza; Khodadadi, Abbas Ali; Mortazavi, Yadollah

doi:10.1016/j.snb.2013.10.001

Cited by 77 publications

(31 citation statements)

References 58 publications

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“…A certain amount of C 2 H 5 OH gas was injected into the testing container through a syringe, such that the concentration of the gas in the container was 10, 20, 50, or 100 ppm. The ZnO-based sensor was used to detect the gas at these concentrations [17][18][19]. The response of the ZnO-based sensor with respect to the reducing gas, C 2 H 5 OH, was defined as Ra/Rg, where Ra and Rg were the resistances of the ZnO-based sensor in air and in the target gas, respectively.…”

Section: Methodsmentioning

confidence: 99%

Synthesis of porous ZnO nanostructures using bamboo fibers as templates

Lian

et al. 2014

Materials Science-Poland

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In this study, we fabricated ZnO nanostructures using bamboo fibers as templates. The starting material used was zinc acetate, and the nanostructures were synthesized by soaking and calcining the bamboo fibers. The fabricated nanostructures were characterized using X-ray powder diffraction (XRD) analysis, scanning electron microscopy (SEM), and ultravioletvisible spectrophotometry. The results showed that the size of the ZnO nanoparticles was approximately 20 -100 nm. When the ZnO nanoparticles were used as the catalyst in the photodegradation of methyl orange, the dye degraded by 95.98 % in 80 min. The response and recovery times of a gas sensor based on the ZnO nanoparticles were 25 and 24 s, respectively, during the detection of C 2 H 5 OH in a concentration of 10 ppm at 270°C.

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Section: Methodsmentioning

confidence: 99%

Synthesis of porous ZnO nanostructures using bamboo fibers as templates

Lian

et al. 2014

Materials Science-Poland

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“…In fact with increasing the concentration of oxygen vacancies as electron donors in ZnO 1-x lattice, the amount of active absorbed oxygen species increases. Theoretically, because of the smaller Ga 3+ radius, when Ga 2 O 3 is diffused into ZnO lattice, Ga 3+ will substitute Zn 2+ [40] and create oxygen vacancies which caused more efficient sensing behavior [41,42].…”

Section: Characterization Of Ga 2 O 3 -Zno Nanohybridsmentioning

confidence: 99%

“…As gallia is added to ZnO, the structure becomes harder and the adsorption of ethanol gets stronger [58]. In addition, usually maximum responses of n-type semiconductor metal oxide sensors are much larger to ethanol than to CO, because the number of electrons released upon exposure to ethanol is more than those to CO [59,60].…”

Section: Page 11 Of 37mentioning

confidence: 99%

Gallia–ZnO nanohybrid sensors with dramatically higher sensitivity to ethanol in presence of CO, methane and VOCs

Bagheri

Khodadadi

Mahjoub

et al. 2016

Sensors and Actuators B: Chemical

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“…Many metal oxide semiconductor sensors such as SnO 2 , TiO 2 , and ZnO have been fabricated and they exhibit a high sensitivity. Even, the Sm 2 O 3 -loaded ZnO sensor was prepared to improve the sensitivity and selectivity in a gas mixture [89]. Generally, Cd-based materials were not extensively studied for gas sensing applications because of the poor sensitivity of these materials in the bulk form.…”

Section: Sensorsmentioning

confidence: 99%

Overview on the synthesis and applications of cadmium hydroxide nanomaterials

Liu

et al. 2015

J IRAN CHEM SOC

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common methods, such as hydrothermal method, solvothermal method, wet chemical method. Besides, the metalorganic coordination polymers (MOCPs) have been thought as effective templates to obtain the desired nanomaterials in the recent studies. By choosing appropriate MOCP precursors with special morphologies and under suitable experimental conditions, we can obtain the desired morphologies and even the nano-compounds that can be obtained by other methods [3,4]. Among the various divalent metal hydroxides, cadmium hydroxide [Cd(OH) 2 ] is a wide band gap semiconductor with a wide range of possible applications, including solar cells, phototransistors and diodes, transparent electrodes, and sensors, and consequently [5][6][7]. Furthermore, Cd(OH) 2 is an important precursor to prepare cadmium oxide (CdO) [8-11] by high-temperature calcination or for other functional materials such as cadmium sulfide (CdS) [12,13] and cadmium selenide (CdSe) [14-17] by reaction with appropriate compounds, which can be used as electrode additives to increase the discharge capacity of Cd-Ni batteries or pseudocapacitor and reduce self-discharge [18][19][20][21][22]. Numerous techniques have been proposed to synthesize various Cd(OH) 2 nanostructures with promising control of properties. And their potential applications and future prospects have also been discussed. Synthesis of Cd(OH) 2 nanomaterials Hydrothermal synthesisAs a common and an effective method to synthesize functional nanomaterials, hydrothermal synthesis method has the advantage of high yield, less pollution, and being easy to operate. And products with good crystallization and various morphologies can be prepared via hydrothermal Abstract Recently, Cd(OH) 2 nanomaterials have attracted attention because of their distinct properties. Cd(OH) 2 nanostructures with different morphologies have been successfully synthesized and used in various fields. In this paper, the preparation of Cd(OH) 2 nanomaterials is reviewed including hydrothermal, solvothermal, wet chemical, refluxing, microwave-assisted methods, and their applications are briefly introduced in hydrophobic and hydrophilic materials, adsorption of negative organic molecules, sensors, and electrode materials. The development trend and prospects of the preparation of nano Cd(OH) 2 are proposed.

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Highly sensitive and selective ethanol sensor based on Sm2O3-loaded flower-like ZnO nanostructure

Cited by 77 publications

References 58 publications

Synthesis of porous ZnO nanostructures using bamboo fibers as templates

Synthesis of porous ZnO nanostructures using bamboo fibers as templates

Gallia–ZnO nanohybrid sensors with dramatically higher sensitivity to ethanol in presence of CO, methane and VOCs

Overview on the synthesis and applications of cadmium hydroxide nanomaterials

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