Silver oxides nanoparticle in gas sensors applications

Hassan, Ehssan S.; Elttayef, Abdulhussain K.; Mostafa, Suzan Hadi; Kt, Mohammed Salim; Chiad, Sami Salman

doi:10.1007/s10854-019-01954-1

Cited by 23 publications

(10 citation statements)

References 14 publications

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“…The reduction in the surface roughness observed for the films was a result of the drop in the grain sizes estimated for the CuO‐40d, CuO‐80d, and CuO‐120d samples relative to CuO‐1d (Figure 1), similar to previous reports. [ 27 ] This is because smaller grains can decrease the coercivity of nanoparticles, which will result in the formation of smoother films. [ 28 ] The surface roughness significantly improved to 20.9 nm for the CuO‐150d films.…”

Section: Resultsmentioning

confidence: 99%

Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

Kyesmen,

Nombona,

Diale

2023

Adv Materials Inter

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The surface properties of semiconductors have a significant influence on their photoelectrocatalytic efficiency. This research presents a precursor aging method for tuning the surface properties of CuO films, for enhanced catalytic response. A precursor solution made using copper acetate, polyethylene glycol (PEG) 400, and diethanolamine, and aged for 1, 40, 80, 120, 150, 180, and 250 days is used in each case to fabricate CuO photocathodes via the dip‐coating method. The films fabricated using the 1‐day‐old precursor reveal compact and homogeneous nanoparticles. The films eventually get tuned to yield highly porous and rougher surfaces after aging the precursors for 180–250 days. The film's bandgap decreases by 9% after 180–250 days of precursor aging. Photocathodes prepared using the 180‐day‐old precursor produce the optimum photocurrent density of 1.6 mA cm−2 at 0.35 V versus reversible hydrogen electrode (RHE), representing a 196% increase relative to the films fabricated using the 1‐day‐old solution. They also produce an anodic onset potential shift of 260 mV. This improved photoelectrocatalytic response is due to the porous morphology of the films, which produces a larger surface area that enhances light absorption, increases active sites for catalytic reactions, and reduces charge transfer resistance at the photocathode‐electrolyte interface.

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Section: Resultsmentioning

confidence: 99%

Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

Kyesmen,

Nombona,

Diale

2023

Adv Materials Inter

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“…Due to the improving crystallization reduces crystal defects, microstrain, and dislocation density. The estimate of the crystallite size, micro-strain and dislocation density were calculated by using the equations (1,2,3) and listed in Table (1), measured and calculated structural parameters [30]. Where λ =1.5405 Å, is the wavelength of the used X-ray, k = 0.9 is the geometrical constant, β is the FWHM in rad, and θ is the reflection angle.…”

Section: Resultsmentioning

confidence: 99%

Optical and Electrical Conductivity of SnO:Cu Nanoparticles

Ali

2021

MJS

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This study included a different weight ratio of copper (2, 4, 6, 8) wt% as a dopant, with tin oxide SnO2 deposits on glass substrate by RF reactive magnetron sputter. The structural properties show polycrystalline pattern nature for all deposit samples with dominated reflection (110). The electrical conductivity increased to 1×13010 S-1 and the optical conductivity to 35×1016 S-1. The energy gap decreased to 3.60 eV when the rate of deformation was 8wt%, due to the increase in the crystallite size to 24.5 nm with the improvement of crystallization. While the surface measurements showed an increase in the surface roughness to 50 nm when the rate of deformation at 8wt%.

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“…Generally speaking, an increase in crystallite size can be linked to a decrease in optical band gap [36]. The bandgap energy Eg of these films has been determined based on the absorption spectra utilizing the relation [37,38]:…”

Section: Optical Properties Analysismentioning

confidence: 99%

Synthesis and characterization of manganese-doped FeS2 thin films via chemical spray pyrolysis

Ali¹,

Rasheed²,

Habubi³

et al. 2023

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A thin film of iron disulfide (FeS2) and Mn-doped was prepared using the chemical spray pyrolysis (CSP) method at a constant temperature of the glass substrate at around 400 °C. According to XRD examination, films were structurally cubic oriented with a predominant planar orientation (201). The doping of Mn ions in the FeS2 host matrix was confirmed by a minor shift of the diffraction peak towards the lower 2θ values. The surface of the produced film for pyrite was homogeneous, according to the AFM investigations. According to the XRD data, the predicted grain size altered as the consistent manganese increased. When compared to undoped FeS2 thin films, the Mn2+- doped FeS2 thin films' desired bandgap energy showed a red shift.

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Silver oxides nanoparticle in gas sensors applications

Cited by 23 publications

References 14 publications

Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

Tuning the Surface Properties of CuO Films Using the Precursor Aging Approach for Enhanced Photoelectrocatalytic Reactions

Optical and Electrical Conductivity of SnO:Cu Nanoparticles

Synthesis and characterization of manganese-doped FeS2 thin films via chemical spray pyrolysis

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