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Your search keyword '"Alomair, Nuhad A."' showing total 26 results
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26 results on '"Alomair, Nuhad A."'

2. Author Correction: Beneficial effects of adding magnesium to desalinated drinking water on metabolic and insulin resistance parameters among patients with type 2 diabetes mellitus: a randomized controlled clinical trial

Author

Albaker, Waleed I., Al-Hariri, Mohammed T., Al Elq, Abdulmohsen H., Alomair, Nuhad A., Alamoudi, Ahmed S., Voutchkov, Nikalay, Ihm, Seungwon, Namazi, Mohammed A., Alsayyah, Ahmed A., AlRubaish, Fatima A., Alohli, Fadwa T., Zainuddin, Fatma A., Alobaidi, Anwar A., Almuzain, Fatimah A., Elamin, Mohamed O., Alamoudi, Naela B., Alamer, Mashael A., Alghamdi, Abdulrahman A., and AlRubaish, Nafie A.

Published
2023
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6. Beneficial effects of adding magnesium to desalinated drinking water on metabolic and insulin resistance parameters among patients with type 2 diabetes mellitus: a randomized controlled clinical trial

Author

Albaker, Waleed I., Al-Hariri, Mohammed T., Al Elq, Abdulmohsen H., Alomair, Nuhad A., Alamoudi, Ahmed S., Voutchkov, Nikalay, Ihm, Seungwon, Namazi, Mohammed A., Alsayyah, Ahmed A., AlRubaish, Fatima A., Alohli, Fadwa T., Zainuddin, Fatma A., Alobaidi, Anwar A., Almuzain, Fatimah A., Elamin, Mohamed O., Alamoudi, Naela B., Alamer, Mashael A., Alghamdi, Abdulrahman A., and AlRubaish, Nafie A.

Published
2022
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15. The Role of the Ferroelectric Polarization in the Enhancement of the Photocatalytic Response of Copper-Doped Graphene Oxide–TiO2 Nanotubes through the Addition of Strontium

Author

Alomair, Nuhad Abdullah, primary, Al-Aqeel, Nouf Saleh, additional, Alabbad, Sanaa Saad, additional, Kochkar, Hafedh, additional, Berhault, Gilles, additional, Younas, Muhammad, additional, Jomni, Fathi, additional, Hamdi, Ridha, additional, and Ercan, Ismail, additional

Published
2023
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19. The role of strontium on the enhancement of photocatalytic response of TiO2 nanotubes – application in methylene blue and formic acid photodegradation under visible light and UV-A.

Author

Alomair, Nuhad A.

Subjects
METHYLENE blue, VISIBLE spectra, PHOTODEGRADATION, FORMIC acid, STRONTIUM, NANOTUBES
Abstract

The influence of ferroelectric strontium nanoparticles on the photocatalytic performance of 1 D TiO2 nanotubes (NT) was herein highlighted. The effect of adding various amounts of Sr nanoparticles onto NTs was therefore deeply characterized by means of Raman, UV-vis diffuse reflectance, photoluminescence (PL) and X-ray photoelectron spectroscopies, X-ray diffraction, N2 adsorption-desorption measurements and scanning electron microscopy coupled with energy-dispersive X-ray analysis as well as determining dielectric properties. The different xwt%Sr-NTs with x =(0.2, 0.4, 0.6, 0.8 and 1 wt%) were investigated for the photodegradation of Methylene Blue (MB) under visible light and formic acid under UV-A. Results emphasize that the kinetic study fits well with Langmuir-Hinshelwood (LH) model; for the same surface coverage (θ =0.99), the rate constant kLH increases versus Sr loading with an optimum at 0.8 wt% Sr. Under UV-A light, photodegradation increases versus Sr loading. As evidenced by PL, impedance and XPS measurements, the presence of ferroelectric strontium generates structural defects (Ti3+ and Ov) with strong opportunity to monitor the separation the photogenerated (electron- hole) pairs regardless of the synthesis limitations. Herein, the molar ratio O2-/Ti4+ increases vs strontium loading. Hence, Sr-NTs opens new route for "assisted" photocatalysts. [ABSTRACT FROM AUTHOR]

Published
2022
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26. Kinetic and mechanistic features on the reaction of stored TiO2 electrons with Hg (II), Pb (II) and Ni (II) in aqueous suspension

Author

Mohamed, Hanan H., Alomair, Nuhad A., Bahnemann, Detlef W., Mohamed, Hanan H., Alomair, Nuhad A., and Bahnemann, Detlef W.

Abstract

The reaction of electrons stored on TiO2 nanoparticles with heavy metal ions Hg (II), Ni (II) and Pb (II) has been studied employing steady state and stopped flow spectrophotometric techniques. Prior to kinetic investigation the formation of metal deposits is detected by their surface Plasmon absorbance observed after mixing of their corresponding metal ions with stored electron on TiO2 nanoparticles (eTiO2-). The dynamic of transfer of stored TiO2 electrons to Hg (II), Pb (II) and Ni (II) in water has been investigated after mixing in the stopped flow chamber following the decrease of the absorbance of eTiO2- at 600nm. The results indicate that Hg (II), Pb (II) and Ni (II) ions react readily with eTiO2-The kinetic parameters of the electron transfer reactions have been obtained by pseudo first order fitting. In the presence of Hg (II) ions, the transients decay followed by a buildup at 380-480nmrange. In the presence of Pb (II) and Ni (II), a concurrent decay of TiO2 electron absorbance and buildup of the absorbance of metal deposits were observed. The rate constants of the electron transfer reactions induced by TiO2 stored electrons to metal ions increase with the driving force of the reaction according to Tafel equation.

Published
2016

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