Synthesis of a novel ZnAl2O4/CuS nanocomposite and its characterization for photocatalytic degradation of acid red 1 under UV illumination

Fahoul, Youssef; Zouheir, Morad; Tanji, Karim; Kherbeche, Abdelhak

doi:10.1016/j.jallcom.2021.161708

Cited by 30 publications

(4 citation statements)

References 66 publications

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“…The symmetry of the peaks decreased in the solids at lower zinc content, and the NiAl 2 O 4 species primarily occurred in the AZ15-500 material. The broader peaks in materials with lower zinc content were caused by the presence of spinel-type structures, which occur in aluminates and transitional aluminas [1,2,32,33,34].…”

Section: Resultsmentioning

confidence: 99%

Study of NiO/Al2O3 and NiO/Zn-Al2O3 catalysts for water gas shift reaction

Meza-Fuentes,

Rodríguez Ruíz,

Castellar Arroyo

et al. 2023

Universitas Scientiarum

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Nickel-based catalysts are of great importance for the generation of hydrogen from natural gas. Within this process, the conditions in which commercial NiO/Al2O3 is converted to Ni0/Al2O3 catalyst should be further investigated. A widely used technique to identify Ni2+ reduction conditions and the different compounds or types of particles in which this element is present is temperature-programmed reduction. In this work, the type of nickel oxide particles occurring on Al2O3 and ZnO-Al2O3-based supports were studied by different techniques, such as energy-dispersive X-ray spectroscopy, FTIR, the BET method, X-ray diffraction (XRD), and Temperature Programmed Reduction (TPR). All materials were evaluated in the water gas shift reaction (WGS), and the influence of their characteristics on the catalytic activity was assessed. Solids were prepared at different temperatures and Ni/Zn molar ratios. The results showed the presence of NiO in all materials, as well as the presence of ZnO, NiAl2O4, and ZnAl2O4 in materials prepared at higher temperatures. In all the materials calcined at the lowest temperature, the formation of NiO particles that fail to interact with the supports was prioritized. As the calcination temperature increased, NiO aggregates were formed, which, to a greater degree, interacted with the supports, whereby nickel aluminate was detected in all materials prepared at 750 °C. Zinc increased the selectivity but decreased specific surface area and activity through the WGS reaction. The solid labeled AZ15-500 showed higher activity and selectivity, reaching values of 100% for the water gas shift reaction.

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Section: Resultsmentioning

confidence: 99%

Study of NiO/Al2O3 and NiO/Zn-Al2O3 catalysts for water gas shift reaction

Meza-Fuentes,

Rodríguez Ruíz,

Castellar Arroyo

et al. 2023

Universitas Scientiarum

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“…In this regard, the XRD diffraction patterns of PVC-NC@TALCM at 1%, 3%, and 5% of titanium aluminate exhibit the varied type of crystalline phase’s peak; this reveals the presence of some crystalline peak indicating the complete homogenous distribution of TiAl 2 O 4 in the PVC/NC membrane matrix. Furthermore, the increase in TiAl 2 O 4 % leads to a sharp, intense peak at about 2θ of 24.13, 25.93, and 33.5 for 1%, 3%, and 5% of TiAl 2 O 4 respectively (Fahoul et al 2021 ). Multiple peaks with lower intensities appear at 2ϴ of 27.8, 34.6, 43.59, and 50.35, 38.17, and 48.55, attributed to (220) and (311) of TiAl 2 O 4 %, respectively.…”

Section: Resultsmentioning

confidence: 99%

Removing of cationic dyes using self-cleaning membranes-based PVC/nano-cellulose combined with titanium aluminate

Elfiky,

Mubarak,

Keshawy

et al. 2023

Environ Sci Pollut Res

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This research used the phase inversion approach to construct polyvinyl chloride nanocellulose@titanium aluminate nanocomposite membranes (PVC/NC@TALCM) to adsorb and filter dye from wastewater. FTIR, XRD, and SEM were used to determine the adsorptive nanocomposite membrane that had been synthesized. The thermal and electrical properties measurements were carried out using a static system. The influence of several adsorbent dosages, pH, and dye concentrations on the nanocomposite membrane’s adsorption ability was investigated. Using a dead-end filtration system, the PVC-NC@TALCM was evaluated as a pressure filtration membrane system. It was found that 98.6% of MB dye was removed by PVC-NC@TALCM membrane, which was loaded with 5% titanium aluminate at pH 10. The kinetic adsorption studies indicated that the adsorption of MB onto the PVC-NC@TALCM nanocomposite membrane obeys pseudo-second-order that indicates the chemosorption process. The isotherm data were described using Freundlich and Langmuir models, and the Freundlich isotherms were shown to be more closely match the experimental data than the Langmuir model. Finally, the PVC-NC@TALCM nanocomposite membrane was economical, environmentally friendly, and self-cleaning.

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“…7,8 Metal chalcogenides have been proven to exhibit high activity in degrading dyes in just a few hours. 9,10 Although nanomaterials offer a larger surface area and higher energy, they can suffer from self-agglomeration, which can reduce their efficiency. To address this issue, composites are oen created to enhance their effectiveness.…”

Section: Introductionmentioning

confidence: 99%