Photoconversion efficiency of In2S3/ZnO core-shell heterostructures nanorod arrays deposited via controlled SILAR cycles

Almamari, Mohammed Rashid; Ahmed, Naser M.; Holi, Araa Mebdir; Yam, F.K.; Al‐Abri, Mohammed; Almessiere, M.A.; El-Badry, Basma A.; Ibrahem, Mohammed A.; Aldaghri, O.; Ibnaouf, K.H.

doi:10.1016/j.heliyon.2022.e09959

Cited by 7 publications

(3 citation statements)

References 66 publications

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“…For optical properties and electronic transitions of polymeric material, the most important parameters were investigated namely the optical band gap, the number of carbon atoms in clusters, Urbach's energy, refractive index, optical density, and extinction coefficient. By using Tauc's equation the optical energy band gap, E g op can be calculated as shown in equation (1) [20,35,36]:…”

Section: Band Gap Energy and Carbon Clustermentioning

confidence: 99%

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films

El-Badry¹,

Khouqeer²,

Zaki³

2023

Phys. Scr.

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In the present study, nanocomposite films made of TiO2 (0.01 wt.%) nanoparticles (NPs) embedded in polyvinyl alcohol (PVA) polymers were prepared via the solution casting technique. The PVA/TiO2 nanocomposite films were irradiated with several doses of gamma-ray, ranging from 10-90 kGy. The unirradiated/irradiated nanocomposite films were investigated using FTIR spectroscopy, scanning electron microscope (SEM), roughness testing, UV–Vis spectroscopy, refractometry, densitometry, and photoluminescence spectroscopy. The results were then compared to the pure PVA polymer. FTIR spectra showed a decrease in intensity and a broadening of absorption bands due to interactions between the host PVA polymer atoms/molecules and the TiO2 NPs. SEM showed homogeneous dispersion of the TiO2 NPs in the PVA matrix. Gamma irradiation resulted in more significant morphological alterations and changing the roughness characteristics, the magnitude of which depended on the dose. UV-Vis spectra showed the absorption edge significantly changing with increasing gamma doses. The optical energy gap band, Urbach's energy, and the number of carbon clusters of the PVA/TiO2 nanocomposite films before and after gamma radiation were changed in comparison to the pure PVA sample. The refractive index and optical density improved due to the addition of TiO2 and γ-irradiation. The photoluminescence emission results emphasized the PVA/TiO2 film's high sensitivity to γ-rays, especially at high doses, resulting in strong fluorescence peaks due to increased defects in the irradiated films. All in all, the results prove that there are alterations in the PVA polymer after the addition of TiO2 and γ-irradiation, making these films good candidates for a variety of industrial applications, including γ-ray dosimeters.

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Section: Band Gap Energy and Carbon Clustermentioning

confidence: 99%

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films

El-Badry¹,

Khouqeer²,

Zaki³

2023

Phys. Scr.

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“…Attention is paid to nano-heterostructures (NH) based on solids and their solutions, and alloys containing such NHs are incredibly intriguing and essential as building materials for optoelectronic devices [1]. II-VI Nano crystalline semiconductors are characterized by nanoparticles that exhibit compelling unique properties that are lacking in bulk materials, such as having more surface atoms [1][2][3][4]. Because of their unique features, researchers examined the structural properties using scanning electron microscopy (SEM), X-ray diffraction (XRD), and photoluminescence (PL) spectroscopy to investigate the materialsóptical characteristics.…”

Section: Introductionmentioning

confidence: 99%

SYNTHESIS AND CHARACTERIZATION OF CdS/CuAlO2/ITO NANO HETEREOSTRUCTURE NOVEL LED FOR OPTOELECTRONIC APPLICATIONS

Abdul-Ameer

2024

Momento

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Nano-heterostructures (NHs) are drawing attention due to their fascinating properties as materials for constructing nano-electronic devices. CdS and CuAlO2 were prepared using the co-precipitation method and deposited, respectively, on Indium Tin Oxide (ITO) substrate to study their characteristics and effectiveness for light-emitting diode (LED) applications and photodetectors. Investigations were made on the morphological, optical, and electrical characteristics. According to the X-ray diffraction pattern, CdS nanoparticles have a cubic phase structure and diffraction peaks at 26.3◦, 43.8◦, and 51.8◦. UV-visible optical studies were used to characterize the absorbance of CdS, CuAlO2, and CdS/CuAlO2/ITO with redshift around 400 nm for the nanoparticles. Using the Tauc plot, the band gap energy of the prepared heterostructure showed a value of 3.1eV. The Scanning Electron Microscopy (FESEM) images show homogeneous morphology with little agglomeration. I-V characterization reveals good properties with high forward current power. CdS/CuAlO2/ITO shows high responsivity of 0.45 A/W, which indicates a straightforward, low-cost, and effective fabrication technique for the fabrication of light-emitting diodes and a promising heterostructure for manufacturing photo detectors.

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“…The capacity of ZnO to photodegrade the organic contaminants from water is improved when these electrons are absorbed by the dissolved oxygen on its surface, producing hydrogen peroxide and a hydroxyl radical. Additionally, Almamari et al reported that ZnO nanostructure optimization can improve the optical absorbance and photochemical performance of ZnO [ 28 ]. As a result, it is critical to understand how turning ZnO nanomorphology with good crystallinity from nanoparticulates to nanorods affects the PEC performance and durability of the developed photoelectrodes.…”

Section: Introductionmentioning

confidence: 99%

Photoelectrochemical Green Hydrogen Production Utilizing ZnO Nanostructured Photoelectrodes

Al-Saeedi

2023

Micromachines

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One of the emerging and environmentally friendly technologies is the photoelectrochemical generation of green hydrogen; however, the cheap cost of production and the need for customizing photoelectrode properties are thought to be the main obstacles to the widespread adoption of this technology. The primary players in hydrogen production by photoelectrochemical (PEC) water splitting, which is becoming more common on a worldwide basis, are solar renewable energy and widely available metal oxide based PEC electrodes. This study attempts to prepare nanoparticulate and nanorod-arrayed films to better understand how nanomorphology can impact structural, optical, and PEC hydrogen production efficiency, as well as electrode stability. Chemical bath deposition (CBD) and spray pyrolysis are used to create ZnO nanostructured photoelectrodes. Various characterization methods are used to investigate morphologies, structures, elemental analysis, and optical characteristics. The crystallite size of the wurtzite hexagonal nanorod arrayed film was 100.8 nm for the (002) orientation, while the crystallite size of nanoparticulate ZnO was 42.1 nm for the favored (101) orientation. The lowest dislocation values for (101) nanoparticulate orientation and (002) nanorod orientation are 5.6 × 10−4 and 1.0 × 10−4 dislocation/nm2, respectively. By changing the surface morphology from nanoparticulate to hexagonal nanorod arrangement, the band gap is decreased to 2.99 eV. Under white and monochromatic light irradiation, the PEC generation of H2 is investigated using the proposed photoelectrodes. The solar-to-hydrogen conversion rate of ZnO nanorod-arrayed electrodes was 3.72% and 3.12%, respectively, under 390 and 405 nm monochromatic light, which is higher than previously reported values for other ZnO nanostructures. The output H2 generation rates for white light and 390 nm monochromatic illuminations were 28.43 and 26.11 mmol.h−1cm−2, respectively. The nanorod-arrayed photoelectrode retains 96.6% of its original photocurrent after 10 reusability cycles, compared to 87.4% for the nanoparticulate ZnO photoelectrode. The computation of conversion efficiencies, H2 output rates, Tafel slope, and corrosion current, as well as the application of low-cost design methods for the photoelectrodes, show how the nanorod-arrayed morphology offers low-cost, high-quality PEC performance and durability.

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Photoconversion efficiency of In2S3/ZnO core-shell heterostructures nanorod arrays deposited via controlled SILAR cycles

Cited by 7 publications

References 66 publications

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films

SYNTHESIS AND CHARACTERIZATION OF CdS/CuAlO2/ITO NANO HETEREOSTRUCTURE NOVEL LED FOR OPTOELECTRONIC APPLICATIONS

Photoelectrochemical Green Hydrogen Production Utilizing ZnO Nanostructured Photoelectrodes

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Photoconversion efficiency of In2S3/ZnO core-shell heterostructures nanorod arrays deposited via controlled SILAR cycles

Cited by 7 publications

References 66 publications

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO2 nanocomposite films

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO2 nanocomposite films

SYNTHESIS AND CHARACTERIZATION OF CdS/CuAlO2/ITO NANO HETEREOSTRUCTURE NOVEL LED FOR OPTOELECTRONIC APPLICATIONS

Photoelectrochemical Green Hydrogen Production Utilizing ZnO Nanostructured Photoelectrodes

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Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films

Gamma rays induced modifications in the structural, optical and photoemission properties of PVA/TiO₂ nanocomposite films