Synthesis, structural, magnetic and NO2 gas sensing property of CuO nanoparticles

Chethana, D. M.; Thanuja, T. C.; Mahesh, H.M.; Kiruba, M.; Jose, Anu; Barshilia, Harish C.; Manjanna, J.

doi:10.1016/j.ceramint.2020.06.129

Cited by 53 publications

(17 citation statements)

References 56 publications

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“…Mainly, CuO nanoparticles are used as a gas sensing material to detect various gases such as NO 2 , acetone, ethanol, H 2, etc. [200,203,204]. Findings have also proved that copper oxide thin films can be applied as gas sensors to detect other compounds such as carbon oxides, hydrogen sulfate, and ammonia with great sensor performance (high sensitivity, selectivity, and stability).…”

Section: Iron Oxide Nanoparticles (Fe 3 O 4 Nps)mentioning

confidence: 90%

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

Dadkhah

Tulliani

2022

Sensors

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During recent decades, metal oxide semiconductors (MOS) have sparked more attention in various applications and industries due to their excellent sensing characteristics, thermal stability, abundance, and ease of synthesis. They are reliable and accurate for measuring and monitoring environmentally important toxic gases, such as NO2, NO, N2O, H2S, CO, NH3, CH4, SO2, and CO2. Compared to other sensing technologies, MOS sensors are lightweight, relatively inexpensive, robust, and have high material sensitivity with fast response times. Green nanotechnology is a developing branch of nanotechnology and aims to decrease the negative effects of the production and application of nanomaterials. For this purpose, organic solvents and chemical reagents are not used to prepare metal nanoparticles. On the contrary, the synthesis of metal or metal oxide nanoparticles is done by microorganisms, either from plant extracts or fungi, yeast, algae, and bacteria. Thus, this review aims at illustrating the possible green synthesis of different metal oxides such as ZnO, TiO2, CeO2, SnO2, In2O3, CuO, NiO, WO3, and Fe3O4, as well as metallic nanoparticles doping.

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Section: Iron Oxide Nanoparticles (Fe 3 O 4 Nps)mentioning

confidence: 90%

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

Dadkhah

Tulliani

2022

Sensors

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“…For instance, the CO conversions of CNM and CNR catalyst were found to be 61.8 and 54.2, respectively at 150 ºC. The improved catalytic performance of CNM can be related to the high dispersion of the metal oxide particles and higher surface area of this catalyst compared to CNR, as evidenced by the preparation method, particle size, morphology, and textural properties [29][30][31]. Following the increase of temperature from 150 to 300 •C, a signi cant increase in the catalytic activity for CNM and CNR was absorbed, reaching a maximum at 300•C.…”

Section: Catalytic Performancementioning

confidence: 97%

2D Polymeric Network of Cu/Na, A Route for the Preparation Truncated Octahedral Catalyst Applicable in the WGS Reaction

Razmara

2021

Preprint

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A 2D heterometallic copper(II)–sodium(I) complex based on pyridine 2,6-dicarboxylato (dipic2-) formulated as [Cu(μ-dipic)2{Na2(µ-H2O)4}]n. 2nH2O (1) has been synthesized. Thermal stability of complex 1 was studied by thermo gravimetric analysis (TGA) and differential thermal analysis (DTA). Single-crystal X-ray diffraction (SC-XRD) analysis showed that the parallelepiped colorless crystal of complex 1 crystallizes in a monoclinic system with the space group P2/c . A highly dispersed truncated octahedral catalyst formulated as Cu-Na/Al2O3 (CNM) was prepared by thermal decomposition of complex 1. Besides, the reference catalyst of Cu-Na/Al2O3 (CNR) was prepared by impregnation conventional method. The catalysts were examined by FT-IR, powder X-ray diffraction (XRD), scanning electron microscopy (SEM), Brunauer–Emmett–Teller (BET) surface area, and subjected to water-gas shift (WGS) reaction in the temperature range of 150-400 °C. The catalysts showed strong surface structure-activity dependence in WGS reaction. Improved catalytic performance during the water-gas shift reaction was observed for CNM compared to CNR due to its high dispersion, smaller particle size, and higher BET specific surface area.

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“…In recent years, metal oxide semiconductors (MOSs), such as ZnO, In 2 O 3 , SnO 2 , TiO 2 , CuO, and WO 3 [8][9][10][11][12][13], have been widely used for detecting various gases (involving NO 2 [14], CO [15], H 2 S [16], Cl 2 [17], ethanol [18], acetone [19], etc.) due to the advantages of high sensitivity, good selectivity, fast response and recovery characteristics, and long-term stability [20].…”

Section: Introduction mentioning

confidence: 99%

Electrospun Cu-doped In2O3 hollow nanofibers with enhanced H2S gas sensing performance

et al. 2022

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One-dimensional nanofibers can be transformed into hollow structures with larger specific surface area, which contributes to the enhancement of gas adsorption. We firstly fabricated Cu-doped In2O3 (Cu-In2O3) hollow nanofibers by electrospinning and calcination for detecting H2S. The experimental results show that the Cu doping concentration besides the operating temperature, gas concentration, and relative humidity can greatly affect the H2S sensing performance of the In2O3-based sensors. In particular, the responses of 6%Cu-In2O3 hollow nanofibers are 350.7 and 4201.5 to 50 and 100 ppm H2S at 250 °C, which are over 20 and 140 times higher than those of pristine In2O3 hollow nanofibers, respectively. Moreover, the corresponding sensor exhibits excellent selectivity and good reproducibility towards H2S, and the response of 6%Cu-In2O3 is still 1.5 to 1 ppm H2S. Finally, the gas sensing mechanism of Cu-In2O3 hollow nanofibers is thoroughly discussed, along with the assistance of first-principles calculations. Both the formation of hollow structure and Cu doping contribute to provide more active sites, and meanwhile a little CuO can form p—n heterojunctions with In2O3 and react with H2S, resulting in significant improvement of gas sensing performance. The Cu-In2O3 hollow nanofibers can be tailored for practical application to selectively detect H2S at lower concentrations.

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Synthesis, structural, magnetic and NO2 gas sensing property of CuO nanoparticles

Cited by 53 publications

References 56 publications

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

Green Synthesis of Metal Oxides Semiconductors for Gas Sensing Applications

2D Polymeric Network of Cu/Na, A Route for the Preparation Truncated Octahedral Catalyst Applicable in the WGS Reaction

Electrospun Cu-doped In2O3 hollow nanofibers with enhanced H2S gas sensing performance

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