Structural, optical and gas sensing properties of Cu<sub>2</sub>O/CuO mixed phase: effect of the number of coated layers and (Cr + S) co-Doping

Shaban, Mohamed; Abdelkarem, Khaled; Sayed, Adel M. El

doi:10.1080/01411594.2019.1581886

Cited by 38 publications

(18 citation statements)

References 38 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Table 3 show that Optical band gap, refractive index and extinction coefficient values increase with increasing film thickness up to 4 at% Cu doping and then started to increase. These obtained values satisfy with other works [7,10,11]. Figure 5 ; where R is the reflectance; F(R) is propotional to the absorption coefficient.…”

Section: Optical Propertiessupporting

confidence: 90%

See 1 more Smart Citation

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Zahan

Podder

2020

SN Appl. Sci.

View full text Add to dashboard Cite

In the present investigation, pure MnO 2 and Cu doped MnO 2 (Cu:MnO 2 ) thin films were successfully prepared by the spray pyrolysis deposition technique. Different Cu concentrations were used to analyze the morphological, structural, optical, electrical properties and as well glucose sensitivity measurement has been performed. MnO 2 doped with Cu induces microstructure and is set in the lattice by keeping Mn +2 leading to the micro spherical shape of the samples highlighted from a scanning electron microscope. X-ray diffraction analysis has confirmed the tetragonal MnO 2 crystal structure with α-phase. The crystallite size, crystal structure, texture, and nanoparticle formation in MnO 2 films have been influenced by Cu dopant. The maximum optical transmittance is found to be about 83%. The energy band gap associated with the allowed direct transition is found to increase from 3.82 to 3.96 eV with increasing Cu doping concentration up to 4 at%. Glucose sensitivity was measured by the four-probe technique. Notably, 4 at% Cu:MnO 2 films have demonstrated the superior sensing ability of glucose of 29%.

show abstract

Section: Optical Propertiessupporting

confidence: 90%

“…A good number of research work have been done on the synthesis and characterization of Al, Ag, Co, and Cr, etc. doped MnO 2 thin films [7][8][9][10]. Supplementary to these metals, Cu has a great deal of diligence dopant because of its low cost, good electrical conductivity, non-toxicity and environmentally friendly nature [11].…”

Section: Introductionmentioning

confidence: 99%

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Zahan

Podder

2020

SN Appl. Sci.

View full text Add to dashboard Cite

show abstract

“…The ionic radius of Cs + (272 pm) is higher than that of Na + (191 pm) and Li + (76 pm). Also, using the crystallographic plane indices (hkl), the a and c lattice constants, interplanar distance (d), the volume of the unit cell (V), dislocation constant (δ), the bond length (L), and the strain (∈) are also calculated by Equations ) and shown in Table 1 36‐39

normald = normalλ / 2 sinθ

\frac{1}{normald} = \sqrt{\frac{4}{3} ((), \frac{{normalh}^{2} + {normalk}^{2} + h k}{a^{2}}) + \frac{{normall}^{2}}{{normalc}^{2}} false]}

normalV = \frac{\sqrt{3}}{2} a^{2} normalc

normalL = \sqrt{false(\frac{{normala}^{2}}{3} + {(\frac{1}{2} - u)}^{2} c^{2}} and normalU = ((), \frac{1}{3}) ((), \frac{a 2}{c^{2}}) + \frac{1}{4}

normalδ = D^{- 2}

normal∈ = 0.25 normalβ \cot normalθ

…”

Section: Resultsmentioning

confidence: 99%

“…Also, using the crystallographic plane indices (hkl), the a and c lattice constants, interplanar distance (d), the volume of the unit cell (V), dislocation constant (δ), the bond length (L), and the strain (∈) are also calculated by Equations (3)-(8) and shown in Table 1. [36][37][38][39] d = λ=2 sinθ ð3Þ…”

Section: Structural Propertiesmentioning

confidence: 99%

Efficient photoselectrochemical hydrogen production utilizing of APbI ₃ (A = Na, Cs, and Li) perovskites nanorods

et al. 2020

Self Cite

View full text Add to dashboard Cite

This study investigated the structural, morphological, and optical absorption of three separate perovskites (NaPbI 3 , CsPbI 3 , and LiPbI 3) developed by a lowcost and massive hydrothermal production technique. For all samples, X-ray diffraction (XRD) measurement demonstrated the growth of perovskites in the hexagonal phase along (002) orientation. From the scanning electron microscope (SEM) analyses, the perovskites have mixed morphologies between nano/micro rods and nano/microdiscs. In the visible field, NaPbI 3 demonstrated stronger light absorption than CsPbI 3 and LiPbI 3. The prepared perovskites were tested under visible light as working electrodes for water splitting reactions using Na 2 S 2 O 3 electrolyte. With 2.76% at 405 nm, the NaPbI 3 perovskite photoelectrode in accordance with its optical properties showed the highest incident photon-to-current efficiency (IPCE) among the studied perovskites. Also, the NaPbI 3 perovskite demonstrated higher PEC performance with an H 2 production rate of 38 μmolh −1 cm −2 than many other reported perovskites. The studied perovskites have high stability and reproductivity for the photoelectrochemical H 2 production.

show abstract

“…For RW0.03, there are three peaks of Sr11Mg2Si10, located at 2θ = 29.59°, 30. The angle of X-ray diffraction is inversely related to the interplanar distance according to Bragg's equation: [61][62][63][64] m λ = 2 d sin θ…”

Section: Xrd Structure Analysismentioning

confidence: 99%

Fabrication and Characterization of Nanostructured Rock Wool as a Novel Material for Efficient Water-Splitting Application

et al. 2022

Self Cite

View full text Add to dashboard Cite

Rock wool (RW) nanostructures of various sizes and morphologies were prepared using a combination of ball-mill and hydrothermal techniques, followed by an annealing process. Different tools were used to explore the morphologies, structures, chemical compositions and optical characteristics of the samples. The effect of initial particle size on the characteristics and photoelectrochemical performance of RW samples generated hydrothermally was investigated. As the starting particle size of ball-milled natural RW rises, the crystallite size of hydrothermally formed samples drops from 70.1 to 31.7 nm. Starting with larger ball-milled particle sizes, the nanoparticles consolidate and seamlessly combine to form a continuous surface with scattered spherical nanopores. Water splitting was used to generate photoelectrochemical hydrogen using the samples as photocatalysts. The number of hydrogen moles and conversion efficiencies were determined using amperometry and voltammetry experiments. When the monochromatic wavelength of light was increased from 307 to 460 nm for the manufactured RW>0.3 photocatalyst, the photocurrent density values decreased from 0.25 to 0.20 mA/mg. At 307 nm and +1 V, the value of the incoming photon-to-current efficiency was ~9.77%. Due to the stimulation of the H+ ion rate under the temperature impact, the Jph value increased by a factor of 5 when the temperature rose from 40 to 75 °C. As a result of this research, for the first time, a low-cost photoelectrochemical catalytic material is highlighted for effective hydrogen production from water splitting.

show abstract

Structural, optical and gas sensing properties of Cu₂O/CuO mixed phase: effect of the number of coated layers and (Cr + S) co-Doping

Cited by 38 publications

References 38 publications

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Efficient photoselectrochemical hydrogen production utilizing of APbI ₃ (A = Na, Cs, and Li) perovskites nanorods

Fabrication and Characterization of Nanostructured Rock Wool as a Novel Material for Efficient Water-Splitting Application

Contact Info

Product

Resources

About

Structural, optical and gas sensing properties of Cu2O/CuO mixed phase: effect of the number of coated layers and (Cr + S) co-Doping

Cited by 38 publications

References 38 publications

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Structural, optical and electrical properties of Cu:MnO2 nanostructured thin films for glucose sensitivity measurements

Efficient photoselectrochemical hydrogen production utilizing of APbI 3 (A = Na, Cs, and Li) perovskites nanorods

Fabrication and Characterization of Nanostructured Rock Wool as a Novel Material for Efficient Water-Splitting Application

Contact Info

Product

Resources

About

Structural, optical and gas sensing properties of Cu₂O/CuO mixed phase: effect of the number of coated layers and (Cr + S) co-Doping

Efficient photoselectrochemical hydrogen production utilizing of APbI ₃ (A = Na, Cs, and Li) perovskites nanorods