Journal ArticleDOI
Solvent thermal synthesis and gas-sensing properties of Fe-doped ZnO
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TLDR
In this article, a simple solvent thermal process using methanol or ethanol as solvents was studied, and their gas-sensing properties were also investigated, and the morphology of ZnO micro-bullets synthesized in ethanol was similar to but more uniform than that of pure ZnOs microbullets.Abstract:
In this study, pure ZnO microbullets, ZnO–ZnFe2O4 composite, and ZnO–Fe2O3–ZnFe2O4 composite with micron structured balloons, rods, and particles were prepared by a simple solvent thermal process using methanol or ethanol as solvents. The influence of solvents on the composition and morphology of the products was studied, and their gas-sensing properties were also investigated. The morphology of ZnO microbullets synthesized in ethanol is similar to but more uniform than that of ZnO microbullets synthesized in methanol. The Fe-doped ZnO synthesized in ethanol contains many micron particles homogeneously dispersing on the surface of the microbullets, which is composed of hexagonal wurtzite ZnO and franklinite ZnFe2O4, while Fe-doped ZnO prepared in methanol consists of micron structured balloons, rods, and particles, which is composed of hexagonal wurtzite ZnO, hematite Fe2O3, and franklinite ZnFe2O4. Compared with pure ZnO and ZnO–ZnFe2O4 composite, the ZnO–Fe2O3–ZnFe2O4 composite presented high response, rapid response/recovery characteristics, good selectivity, and excellent stability to acetone at relatively low operating temperature of 190 °C. This sensor could detect acetone in wide range of 1–1000 ppm, which was expected to be a promising gas sensor for detecting acetone.read more
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Applications of hierarchically structured porous materials from energy storage and conversion, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine
Ming-Hui Sun,Shaozhuan Huang,Li-Hua Chen,Yu Li,Xiao-Yu Yang,Zhong-Yong Yuan,Bao-Lian Su,Bao-Lian Su,Bao-Lian Su +8 more
TL;DR: Recent progress in the applications of hierarchically structured porous materials from energy conversion and storage, catalysis, photocatalysis, adsorption, separation, and sensing to biomedicine is reviewed and could stimulate researchers to synthesize new advanced hierarchically porous solids.
Journal ArticleDOI
Micro-lotus constructed by Fe-doped ZnO hierarchically porous nanosheets: Preparation, characterization and gas sensing property
TL;DR: In this article, a microlotus constructed by hierarchically porous Fe-doped ZnO nanosheets via a facile hydrothermal method is reported, and the results showed that the morphology of the sample did not change with the Fe doping amount.
Journal ArticleDOI
Facile fabrication of highly efficient modified ZnO photocatalyst with enhanced photocatalytic, antibacterial and anticancer activity
Waseem Raza,Syed Mohammad Faisal,Mohammad Owais,Detlef W. Bahnemann,Detlef W. Bahnemann,Mohammad Muneer +5 more
TL;DR: In this paper, the degradation of organic pollutants in the aqueous medium using semiconductor photocatalysts has become an attractive method for detoxification of water, and a strategy for the suppression of electron-hole pair recombination rate, extention the absorption edge in the visible region and enhancement of photocatalyst efficiency by introducing rare earth metal as a dopant was reported.
Journal ArticleDOI
Structural and frequency dependent dielectric properties of Fe3+ doped ZnO nanoparticles
TL;DR: In this paper, polycrystalline Fe doped ZnO nanoparticles were synthesized through citrate gel method using XRD, FESEM, EDS, TEM, SAED and FTIR spectroscopy.
Journal ArticleDOI
Synthesis of visible light driven ZnO: Characterization and photocatalytic performance
TL;DR: In this paper, Nanocrystalline materials of pure and doped ZnO with La/Ce metals have been successfully synthesized using sol gel method using standard analytical techniques, i.e., XRD, SEM, EDX, UV-vis Spectroscopy and FTIR.
References
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A water-soluble cationic oligopyrene derivative : Spectroscopic studies and sensing applications
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Sensing characteristics of tin-doped ZnO thin films as NO2 gas sensor
TL;DR: In this paper, the influence of variation of tin concentration in the chemical bath and the RPP temperature on NO 2 sensitivity of thin film sensor elements was investigated, and the experimental results showed that tin doping of zinc oxide thin films improved the sensor element sensitivity to 1.5ppm NO 2 in air and downshift the operating temperature.
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Nano-crystalline Cu-doped ZnO thin film gas sensor for CO
TL;DR: In this paper, a Cu-doped ZnO (CZO) film was prepared on a glass substrate by co-sputtering using znO and Cu targets, which possessed a columnar structure consisting of small crystals with an average grain size of around 5 nm.
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Oxygen sensing characteristics of individual ZnO nanowire transistors
TL;DR: In this article, individual ZnO nanowire transistors are fabricated and their sensing properties are investigated, and the transistors show a carrier density of 2300μm−1 and mobility up to 6.4cm2∕Vs, which are obtained from the ISD−VG curves.
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The tin oxide gas sensor and its applications
TL;DR: In this paper, the authors present a review of the performance of the semiconductor gas sensor in terms of sensitivity and selectivity to various gases, and of the problems presented by its response to changes in ambient temperature and humidity.