Ag doped CuO thin film prepared via pulsed laser deposition for 4-nitrophenol degradation

Menazea, A.A.; Mostafa, Ayman M.

doi:10.1016/j.jece.2020.104104

Cited by 97 publications

(33 citation statements)

References 72 publications

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“…This result is also confirmed by other reports from literature where the effect of other background gases was investigated. [ 11,16,18 ] With the increase in the N 2 pressure from 5 × 10 –5 to 10 Pa, we observed a 60% decrease in the expansion velocity of the ions, a 40%–50% increase in electron temperature, and almost one order of magnitude increase in electron density. These changes reveal, in the laser‐produced plasma, a rather complex exchange balance between the kinetic energy and the thermal energy of the ejected particles, with very little contribution from the thermal movement.…”

Section: Resultsmentioning

confidence: 84%

“…[3,4] The development of these types of applications requires a profound comprehension of the fundamental mechanisms involved in plasma plume formation and evolution. For the case of PLD, which has become a widely used technique to produce complex thin films, [1,5,6] for application as sensors, [7,8] catalysis, [9] biocompatible coatings, [9][10][11] the deposition process usually takes place in a reactive gas, which complicates the dynamics of the ablated material. The presence of the background gas is either justified by the chemical balance needed for the production of oxide, nitride, or carbide films or to control the kinetic energy of the ablated particles during the impact with the substrate to avoid defects formation in deposited films.…”

Section: Introductionmentioning

confidence: 99%

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Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

Irimiciuc

Chertopalov

Crăciun

et al. 2020

Plasma Processes & Polymers

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With the continuous development of pulsed laser deposition as a versatile technique for the deposition of complex thin films, there is a need for a better understanding of the role and control of the deposition parameters. The understanding of the particle kinetics and plasma chemistry during the deposition process can greatly improve the properties of the synthesized films. By using the floating voltage regime of the Langmuir probe technique, we performed angular and time-resolved measurements during laser ablation of an Ag target, which evidenced the structuring of the plasma plume in ultrahigh vacuum conditions. The addition of N 2 gas in the pressure range from 5 × 10-5 to 10 Pa leads to more rapid plasma thermalization and the control of its kinetic energy. The electrical measurements were complemented by optical emission spectroscopy, which showcased the presence of neutral and multiple ionized species distributed across the laser-produced plasma plume. The plasma homogenization resulted in a decrease of the mean free path of Ag ions and atoms, which increased both their excitation temperature and electron density.

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Section: Resultsmentioning

confidence: 84%

Section: Introductionmentioning

confidence: 99%

Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

Irimiciuc

Chertopalov

Crăciun

et al. 2020

Plasma Processes & Polymers

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show abstract

“…They are important because they provide the potential for economical processing employing the smallest quantity of raw materials while achieving the application requirements. [ 20–23 ] They have been utilized in various applications, such as antireflective coatings, [ 24 ] air/water filters, [ 25 ] drug delivery, [ 26 ] light‐emitting diodes, [ 27 ] electronic recording devices, [ 28 ] solar cells [ 29 ] and food packaging. [ 30–33 ] Nanocomposite films immobilized with nanomaterials have received great consideration due to their desirable properties, such as optical, [ 34 ] catalytic, [ 35 ] sensory, [ 36,37 ] water‐repellent, [ 38,39 ] antimicrobial, [ 40 ] UV protection, [ 41 ] and electrical conductivity [ 42 ] that make them suitable for various advanced technical applications.…”

Section: Introductionmentioning

confidence: 99%

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

et al. 2020

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Smart photochromic and fluorescent products can respond to an external stimulus by changing their colour and emission spectra with light. Here, we developed a simple formulation of an organic–inorganic nanocomposite photoluminescent cellulose acetate (CA) film based on immobilization of a lanthanide‐doped pigment. Strontium aluminium oxide pigment doped with Eu2+ and Dy3+ (SAOED) exhibits an optimal excitation wavelength at 365 nm. For better fabrication of the multifunctional colourless pigment–cellulose acetate composites (CA–SAOED), the lanthanide‐doped colourant must be well‐dispersed physically without agglomeration. The fabricated photoluminescence cellulose film exhibited an excitation peak at 436 nm and two fluorescence peaks at 494 and 524 nm. The findings revealed that the originated nanocomposite films demonstrated improved superhydrophobic activity, high ultraviolet light protection and enhanced antibacterial activity without adversely influencing its native physico‐mechanical characteristics. The films demonstrated fast and reversible photochromic responsiveness without fatigue during ultraviolet light irradiation.

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“…[1] Since then, PLD has been used for oxides, nitrides, carbides and more complex perovskite structures for a wide range of applications, such as solar cells, microelectronics, hard and protective coatings and water splitting. [2][3][4][5][6] Achieving and tailoring the properties of complex films have been proven to be demanding tasks as defects, phase changes and nonstoichiometric transfer can affect thin films. [7] As for all plasma-based technologies, for the PLD technique, the ablated cloud (transient plasma) plays a dual role: one role is related to the deposition process kinetics (energies, excited states and velocities) and the second is related to plasma chemistry (molecular formation, nanoparticle agglomeration or bond dissociations), especially for deposition in reactive gases.…”

Section: Introductionmentioning

confidence: 99%

Insight into the plasma oxidation process during pulsed laser deposition

Irimiciuc

Chertopalov

Bulı́ř

et al. 2021

Plasma Processes & Polymers

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The dynamics of transient plasmas generated by ns laser ablation of Ag targets under various O 2 gas pressures (10 −5 -10 Pa) were investigated by implementing angle-and time-resolved Langmuir probe (LP) analysis and space-and timeresolved optical emission spectroscopy (OES). The effects of an O 2 atmosphere on silver oxide formation and the ionic kinetics and the overall plasma energy were systematically investigated. Measurements performed in the LP floating regime revealed the presence of three-ionic structures with kinetic energies varying from 0.8 to 350 eV, which can be tailored by the addition of O 2 . The timemodulated regime of electron temperature in the 0.5-3 eV observed for pressures higher than 2 Pa of O 2 could be explained by the formation and dissociation of silver oxide molecules. The energetic balance sustains molecular oxide formation, as confirmed by OES measurements, which revealed emission signatures of AgO (B 2 Π 3/2 and X 2 Π 3/2 ) in the 350 nm (B 2 Π 3/2 ) and 460 nm (X 2 Π 3/2 ) spectral regions. Finally, thin films were deposited to understand the range of possibilities offered by pulsed laser deposition of Ag in O 2 . The morphology and atomic structure of the films were analysed for large-scale deposition. Silver oxides were detected in the films starting from 2 Pa, while at higher values, we found mixtures of different Ag x O y phases. A cauliflower-like morphology was dominant above 5 Pa of O 2 atmosphere pressures, which signals the formation of the AgO phase in the deposited film. Our results demonstrate that the properties of deposited thin films are influenced by plasma properties.

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Ag doped CuO thin film prepared via pulsed laser deposition for 4-nitrophenol degradation

Cited by 97 publications

References 72 publications

Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

Investigation of laser‐produced plasma multistructuring by floating probe measurements and optical emission spectroscopy

Facile development of photochromic cellulose acetate transparent nanocomposite film immobilized with lanthanide‐doped pigment: ultraviolet blocking, superhydrophobic, and antimicrobial activity

Insight into the plasma oxidation process during pulsed laser deposition

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