Synthesis of CuO thin film sensors by spray pyrolysis method for NO2 gas detection

Khot, Sambhaji; Phalake, Satish; Mahadik, Shivraj; Baragale, Mahendra; Jagadale, Sandhya; Burungale, Vishal; Navale, Y. H.; Patil, V. B.; Patil, Vithoba L.; Patil, Pramod S.; Patil, Shivajirao R.

doi:10.1016/j.matpr.2020.05.583

Cited by 19 publications

(10 citation statements)

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“…Many p-type MOX thin films, including Co 3 O 4 , CuO, and NiO, have been prepared to detect the NO 2 gas in academic research [ 65 , 84 , 158 , 159 , 160 , 161 , 162 ]. However, the development of highly efficient, low-cost, reliable sensors that can operate at room temperature, with the ability to detect NO 2 at concentrations below ppm or even at ppb levels, has yet to be achieved either in academic research or for practical applications.…”

Section: Sensing Properties Of P-type Mox Thin Filmsmentioning

confidence: 99%

“…Hence, it would be useful to discuss how these facts influence the response. Khot et al demonstrated that more porous and rougher surface morphology significantly improves NO 2 sensing efficiency [ 160 ]. In this study, different samples of CuO thin films were grown by varying the precursor concentration in the spray-pyrolysis method at 350 °C.…”

Section: Sensing Properties Of P-type Mox Thin Filmsmentioning

confidence: 99%

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P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Moumen

Kumarage

Comini

2022

Sensors

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This review focuses on the synthesis of p-type metal-oxide (p-type MOX) semiconductor thin films, such as CuO, NiO, Co3O4, and Cr2O3, used for chemical-sensing applications. P-type MOX thin films exhibit several advantages over n-type MOX, including a higher catalytic effect, low humidity dependence, and improved recovery speed. However, the sensing performance of CuO, NiO, Co3O4, and Cr2O3 thin films is strongly related to the intrinsic physicochemical properties of the material and the thickness of these MOX thin films. The latter is heavily dependent on synthesis techniques. Many techniques used for growing p-MOX thin films are reviewed herein. Physical vapor-deposition techniques (PVD), such as magnetron sputtering, thermal evaporation, thermal oxidation, and molecular-beam epitaxial (MBE) growth were investigated, along with chemical vapor deposition (CVD). Liquid-phase routes, including sol–gel-assisted dip-and-spin coating, spray pyrolysis, and electrodeposition, are also discussed. A review of each technique, as well as factors that affect the physicochemical properties of p-type MOX thin films, such as morphology, crystallinity, defects, and grain size, is presented. The sensing mechanism describing the surface reaction of gases with MOX is also discussed. The sensing characteristics of CuO, NiO, Co3O4, and Cr2O3 thin films, including their response, sensor kinetics, stability, selectivity, and repeatability are reviewed. Different chemical compounds, including reducing gases (such as volatile organic compounds (VOCs), H2, and NH3) and oxidizing gases, such as CO2, NO2, and O3, were analyzed. Bulk doping, surface decoration, and heterostructures are some of the strategies for improving the sensing capabilities of the suggested pristine p-type MOX thin films. Future trends to overcome the challenges of p-type MOX thin-film chemical sensors are also presented.

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Section: Sensing Properties Of P-type Mox Thin Filmsmentioning

confidence: 99%

Section: Sensing Properties Of P-type Mox Thin Filmsmentioning

confidence: 99%

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Moumen

Kumarage

Comini

2022

Sensors

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“…However, designing a high-performance NO 2 gas sensor in terms of selectivity, stability, and feasibility in various environmental conditions is still an open challenge for researchers. Nowadays, research has been aimed to enhance the selectivity, sensitivity, repeatability and long-term stability and reduce the response/recovery times of NO 2 gas sensors at lower temperatures. , …”

Section: Introductionmentioning

confidence: 99%

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

et al. 2023

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In view of facile, cost-effective, and environmentally friendly synthetic methods, palladium-doped copper oxide (Pd-CuO) nanoparticles have been synthesized from Ocimum sanctum (commonly known as "Tulsi") phytoextract for gas-sensing applications. The structural, morphological, and compositional properties of Pd-doped CuO nanoparticles were studied using various techniques such as XRD, FESEM, XPS, and EDX. The characterization results confirmed the doping of Pd on CuO nanoparticles, and Pd-CuO nanostructures appear as nanoflakes in FESEM analysis. The gas-sensing response of Pd (1.12 wt %)-CuO nanoflake-based sensor was measured at 5−100 ppm concentration of different gases, NO 2 , H 2 S, NH 3 , and H 2 , at 125 °C. Gas-sensing tests reveal that the sensitivity of the sensor were 81.7 and 38.9% for 100 and 5 ppm concentrations of NO 2, respectively, which was significantly greater than that of pure CuO. The response and recovery times of the sensor were 72 and 98 s for 100 ppm of NO 2 gas, while they were 90 and 50 s for 5 ppm NO 2 . The calculated limit of detection (LOD) value of the sensor is 0.8235. This appealing LOD is suitable for real-time gas detection. The gas sensor was found to exhibit excellent selectivity toward NO 2 gas and repeatability and stability in humid (80%) conditions. The Pd doping in CuO nanostructures plays a significant role in escalating the sensitivity and selectivity of CuO-based NO 2 gas sensor suitable to work at low operating temperatures.

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“…Gas sensors based on semiconducting metal oxides (SMO) including tin dioxide (SnO 2 ), [ 1 ] copper oxide (CuO), [ 2 ] zinc oxide (ZnO), [ 3 ] and tungsten trioxide (WO 3 ) [ 4,5 ] have been widely studied for NO 2 detection as listed in Table 1 . It can be seen that SnO 2 ‐based sensors offer relatively high NO 2 response at similar NO 2 concentrations and working temperatures compared with WO 3 , ZnO, CuO, and nickel oxide (NiO) based nanostructures.…”

Section: Introductionmentioning

confidence: 99%

Enhanced NO₂‐Sensing Properties of Cu‐Loaded SnO₂ Nanoparticles Synthesized via Precipitation and Impregnation Methods

Leangtanom

Chanlek

Yordsri

et al. 2022

Physica Status Solidi (a)

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Herein, NO2 noxious gas sensors based on precipitation/impregnation synthesized SnO2 nanoparticles loaded with Cu2O (Cu2O–SnO2) are presented. The particle properties are characterized by nitrogen adsorption, X‐ray spectroscopic, and microscopic analyses. The NO2‐sensing performances in terms of sensor response, response times, selectivity, and stability are optimized by varying Cu contents. The optimal sensing film (1.0 wt%Cu–SnO2) shows a high sensor response of ≈5680–5 ppm of NO2 at a low operating temperature of 200 °C. In addition, 1.0 wt%Cu–SnO2 sensor exhibits very high NO2 selectivity against SO2, H2S, C2H5OH, H2, C2H2, C2H4, and CH4 compared with unloaded one. Therefore, the 1.0 wt%Cu–SnO2 sensor is a promising candidate for highly sensitive and selective detection of NO2.

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Synthesis of CuO thin film sensors by spray pyrolysis method for NO2 gas detection

Cited by 19 publications

References 10 publications

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

Enhanced NO₂‐Sensing Properties of Cu‐Loaded SnO₂ Nanoparticles Synthesized via Precipitation and Impregnation Methods

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Synthesis of CuO thin film sensors by spray pyrolysis method for NO2 gas detection

Cited by 19 publications

References 10 publications

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

P-Type Metal Oxide Semiconductor Thin Films: Synthesis and Chemical Sensor Applications

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO2 Gas Sensors

Enhanced NO2‐Sensing Properties of Cu‐Loaded SnO2 Nanoparticles Synthesized via Precipitation and Impregnation Methods

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Product

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About

Ocimum sanctum Leaf Extract-Assisted Green Synthesis of Pd-Doped CuO Nanoparticles for Highly Sensitive and Selective NO₂ Gas Sensors

Enhanced NO₂‐Sensing Properties of Cu‐Loaded SnO₂ Nanoparticles Synthesized via Precipitation and Impregnation Methods