Synthesis and characterization of dip-coated ZnO‒CuO composite thin film for room-temperature CO2 gas sensing

Musa, Abul Monsur Mohammed; Rasadujjaman, Md.; Gafur, M. A.; Jamil, A. T. M. K.

doi:10.1016/j.tsf.2023.139838

Cited by 11 publications

(2 citation statements)

References 41 publications

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“…As a result, there is a more efficient exchange of electrons between the two materials. This enhanced electron transfer is a key factor in reducing the band gap of the composite compared to the bare samples [43]. This lower band gap suggests that electron transfer processes are more likely to occur, which enhances gas sensing performance [44].…”

Section: Optical Propertiesmentioning

confidence: 99%

“…The presence of Cu atoms in the ZnO lattice can create defects that affect the band structure and reduce the band gap energy value of the CuO-ZnO composite [40][41][42]. This increased carrier concentration leads to a reduction in the band gap, making it narrower [43]. On the other hand, when ZnO is mixed with CuO, it may provide more active sites at the surface of materials.…”

Section: Optical Propertiesmentioning

confidence: 99%

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Enhanced Gas Sensing Performance of CuO-ZnO Composite Nanostructures for Low-Concentration NO2 Detection

Pakdel,

Borsi,

Ponzoni

et al. 2024

Chemosensors

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The detection of nitrogen dioxide (NO2) is essential for safeguarding human health and addressing environmental sustainability. That is why, in the last decades, gas sensors have been developed to detect NO2 to overcome these hazards. This study explores the use of a novel CuO-ZnO composite synthesized through a polyol and sol–gel technique to enhance gas sensing performance. The CuO-ZnO composite offers the advantage of a synergic combination of its properties, leading to improved sensitivity, selectivity, and low detection limit. The innovative polyol technique employed in this research enables the controlled synthesis of hierarchical CuO and porous ZnO structures. The composite formation is achieved using the sol–gel method, resulting in CuO-ZnO composites with different ratios. The structural, morphological, and optical properties of the materials have been characterized using FESEM, X-ray diffraction, and UV-vis spectroscopy. Gas sensing experiments demonstrate enhanced performance, particularly in sensitivity and selectivity for NO2, even at low concentrations. The composites also exhibit improved baseline stability compared to pristine CuO and ZnO. This study explains the influence of humidity on gas sensing properties by examining interactions between water molecules and sensor surfaces. Notably, the developed CuO-ZnO composite displays excellent selectivity towards NO2, attributed to favorable bonding characteristics and acid-base properties. Overall, this research contributes to advancing gas sensor technology, providing a promising potential for sensitive and selective NO2 detection, thereby addressing critical needs for human health and environmental protection.

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Section: Optical Propertiesmentioning

confidence: 99%

Section: Optical Propertiesmentioning

confidence: 99%

Enhanced Gas Sensing Performance of CuO-ZnO Composite Nanostructures for Low-Concentration NO2 Detection

Pakdel,

Borsi,

Ponzoni

et al. 2024

Chemosensors

View full text Add to dashboard Cite

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Gas sensing performance of Ni-doped CuO/ZnO p–n heterostructures for ethanol detection: high sensitivity, selectivity and stability

Janene,

Moulahi,

Touati

et al. 2023

J Mater Sci: Mater Electron

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Gas sensing capabilities of sol–gel dip-coated pure SnO2 thin films for CO and C3H8 detection

Selvam,

de la Luz Olvera Amador,

Álvarez

2024

J Mater Sci: Mater Electron

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This paper presents a comprehensive investigation to increase the gas sensing capability of pure tin oxide (SnO2) film coatings while ensuring non-contamination. The SnO2 thin-film coatings deposited on glass substrates were processed by homogeneous precipitation and sol–gel dip coating methods. Various characterization techniques, including X-ray diffraction, ultraviolet–visible spectroscopy (UV–Vis), and scanning electron microscopy were used to analyze the structural, optical, and morphological properties of the coatings. The prepared SnO2 coatings were tested using separately two different gases, carbon monoxide (CO) and propane (C3H8), to assess their gas sensing capabilities. The results show a significant influence of the multilayer coating of SnO2 on the sensing performance. Remarkably, the SnO2 sample with three layers exhibited a high sensitivity. By enhancing the gas sensing capabilities of tin oxide films through the dip coating technique, this study contributes to the advancement of gas sensing technologies.

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Synthesis and characterization of dip-coated ZnO‒CuO composite thin film for room-temperature CO2 gas sensing

Cited by 11 publications

References 41 publications

Enhanced Gas Sensing Performance of CuO-ZnO Composite Nanostructures for Low-Concentration NO2 Detection

Enhanced Gas Sensing Performance of CuO-ZnO Composite Nanostructures for Low-Concentration NO2 Detection

Gas sensing performance of Ni-doped CuO/ZnO p–n heterostructures for ethanol detection: high sensitivity, selectivity and stability

Gas sensing capabilities of sol–gel dip-coated pure SnO2 thin films for CO and C3H8 detection

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