Synthesis of ZnO by thermal decomposition of different precursors: photocatalytic performance under UV and visible light illumination

Abd-Rabboh, Hisham S.M.; Eissa, Murad; Mohamed, Sayed Iqbal; Hamdy, Mohamed S.

doi:10.1088/2053-1591/ab04ff

Cited by 17 publications

(7 citation statements)

References 41 publications

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“…Photocatalysis requires irradiation with light of a definite wavelength, while adsorption occurs even in the absence of light. For photocatalysis applications, different sources of light irradiation were applied as Xe lamp (Zhao et al 2017(Zhao et al , 2018, black light UV lamp (Abd-Rabboh et al 2019), UV lamp (360 nm) , and direct sunlight irradiation Wang et al 2018).…”

Section: Introductionmentioning

confidence: 99%

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

Mohamed

Elhgrasi

Ali

2022

Environ Sci Pollut Res

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Tailoring a material that has a synergistic role as an adsorbent and a photocatalyst for environmental application is an attractive field for research. This article presents a study of facile synthesis of NiO and Ni/NiO with a synergistic role as super adsorbents in the lake of light and photocatalysts under light irradiation. Nano flower-like mesoporous NiO and Ni/NiO were synthesized by the co-precipitation method. XRD, SEM, EDAX, XPS, BET, and DR/UV–Vis spectroscopy techniques were employed for samples’ analysis. The point of zero surface charge of prepared samples was detected by the batch equilibrium method. The adsorption efficiency was investigated in the absence of light using aniline blue as a pollutant model dye. The synergistic effect as an adsorbent and a photocatalyst was investigated under UV and sunlight irradiation. Different parameters affecting the adsorption in the dark have been optimized. The results showed that in the absence of light, the prepared samples are super adsorbents with a maximum adsorption capacity ranging from 210 to 230 mg g−1 and a removal % ranging from 95 to 100% within 2 h. Under UV or sunlight irradiation, the adsorbent/photocatalyst attained a dye removal % of 99.8% within 30 min. The adsorption data matched the pseudo-second-order model, and the equilibrium adsorption data showed compatibility with Langmuir model. The findings of experiments revealed that the adsorption is spontaneous, exothermic, and results in less entropy. Under sunlight irradiation, the dye removal efficiency increased by 19% in the case of Ni/NiO hybrid; it showed a removal efficiency of 99.5% within 30 min under sunlight irradiation versus 80% after 120 min in the dark.

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Section: Introductionmentioning

confidence: 99%

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

Mohamed

Elhgrasi

Ali

2022

Environ Sci Pollut Res

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“…ZnO nanostructures have recently attracted considerable attention with their superior response characteristics under different environmental/experimental conditions and have become a widely used for the fabrication of humidity sensors [3], oxygen sensors [4], gas sensors [5], acoustic vibration sensors [6], chemical sensors [7], vacuum pressure sensors [8], photoconductive/photovoltaic photodetectors [9] and light emitters in the UV-region of the electromagnetic spectrum [10]. ZnO nanoparticles can be synthesised by various approaches including sol-gel processing [11], homogeneous precipitation [12], organometallic synthesis [13], mechanochemical synthesis [14], microwave methods [15], thermal evaporation [16], and chemical vapor deposition [17]. It has been revealed that, in using these techniques, various morphologies of ZnO nanostructures such as nanoparticles [1], nanowires [3], nanorods [4], nanofilms [10], nanonails [13], nanobelts [18] (ref), etc.…”

Section: Introductionmentioning

confidence: 99%

ZnO nanoparticles-based vacuum pressure sensor

Sarcan

2020

Nanotechnology

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ZnO nanoparticles synthesized using the sol-gel technique with an average diameter of 11.5 nm are used to fabricate a vacuum pressure sensor in the range of 1 mbar to 10+3 mbar (low vacuum limit). A drastic increase in the current of the drop-casted ZnO on glass with 30 µm separated Au contacts defined by e-beam lithography is observed. The sensor reveals a linear relationship in current versus pressure in a logarithmic plot. In the range of 1 mbar to 10+3 mbar, the sensor sensitivity is found be 110. Using the resistance-time plot of the vacuum pressure, the rise (response) and fall (recovery) times of the sensor are determined as 6.6 and 15.6 s, respectively. The power consumption of the sensor is 6.5 W. The operational parameters of the proposed sensor are found be much better than those of previously reported ZnO nanostructure-based sensors and, indeed, traditional ones. The sensing mechanism of the sensor is explained by the adsorption/desorption of OH− ions from the surface of the ZnO nanoparticles, leaving behind oxygen ions combined with oxygen vacancy states.

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“…The ZnO was a white and thin powder, following the literature. 53,54 The obtained PHB filaments presented a similar morphology to other polyhydroxyalkanoate filaments (PHAs), 55,56 without apparent cracks or voids, indicating that the processing conditions were appropriate. ZnO influenced the surface morphology of the composites filaments.…”

Section: Optical Microscopy and Densitymentioning

confidence: 62%

A promising sustainable PHB‐ZnO composite for development of biodegradable filaments

et al. 2021

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The development of new biodegradable composites with superior properties is an attractive approach to develop environmentally friendly materials with new potential applications. In this work, we prepared and characterized PHB filaments with different concentrations of ZnO particles (from 0.5 up to 16 wt%) to evaluate this mixture's effect on the physico-chemical, thermal properties, and morphological biofilament characteristics. The FTIR and Raman results indicated a possible chemical interaction between the ZnO and PHB, altering the helical polymeric and crystalline structure. The ZnO particles increased the composites' thermal stability, mainly at higher filler contents, confirmed

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Synthesis of ZnO by thermal decomposition of different precursors: photocatalytic performance under UV and visible light illumination

Cited by 17 publications

References 41 publications

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

Facile synthesis of mesoporous nano Ni/NiO and its synergistic role as super adsorbent and photocatalyst under sunlight irradiation

ZnO nanoparticles-based vacuum pressure sensor

A promising sustainable PHB‐ZnO composite for development of biodegradable filaments

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