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Your search keyword '"Chang, Sook-keng"' showing total 7 results
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7 results on '"Chang, Sook-keng"'

6. Unveiling the Exceptional Performance of ZnO/Zn 2 TiO 4 Nanocomposites.

Author

Abbasi, Husnain Ahmad, Al Moneef, Maha M., Khan, Jahanzeb, Hafeez, Muhammad, Hameed, Muhammad Usman, Khan, Muhammad Abdullah, Shahida, Shabnam, Abbasi, Habib Ahmad, and Chang, Sook-Keng

Subjects
POLLUTANTS, TITANIUM dioxide, NANOCOMPOSITE materials, METHYLENE blue, ZINC acetate, DYES & dyeing
Abstract

In this study, we engineered a sub-70 nm nanocomposite of ZnO/Zn2TiO4 using a low-temperature solution-phase method with titanium isopropoxide and zinc acetate as precursors, and isopropyl alcohol and water as solvents. The investigation focused on nanocomposite growth by varying precursor and surfactant concentrations and their efficiency within different pH ranges. All three ZnO/Zn2TiO4 nanocomposites exhibited hexagonal wurtzite ZnO and Zn2TiO4 structures. The crystallite size in these nanocomposites ranged from 39.50 nm to 62.67 nm for ZnO and 21.24 nm to 26.15 nm for Zn2TiO4. Morphological observations using FESEM revealed the formation of dispersed cotton packet-like nanocomposites with sizes ranging from 18 to 350 nm. FTIR analysis showed peaks indicative of Ti–O and Zn–O bond formation, and EDX spectrum confirmed the presence of Ti, O, and Zn. UV spectrums and photocatalytic investigations confirmed the successful formation of ZnO/Zn2TiO4 nanocomposites with notable photocatalytic degradation efficiency for methylene blue dye under various conditions. These findings suggest the potential applicability of the synthesized nanocomposites for environmental pollutant degradation. [ABSTRACT FROM AUTHOR]

Published
2024
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7. Structural, optical, magnetic and photocatalytic properties of Mn-doped Fe2O3nanostructured particles

Author

Jayaprakash, N., Madhappan, Santhamoorthy, Karthikeyan, N.S., Chang, Sook-Keng, and Suresh, R.

Abstract

In this research article, characterization and catalytic properties of manganese ion (Mn)-doped iron(III) oxide (Mn–Fe2O3) nanostructured particles have been reported. Mn–Fe2O3samples were synthesized via the co-precipitation - thermal decomposition (CPTD) method. Samples were analyzed by X-ray diffraction, spectroscopic, and microscopic techniques. The influence of the Mn-doping process in the phase and crystalline structure of Fe2O3was determined by powder X-ray diffractometry (p-XRD), and Fourier transform infrared (FTIR) spectroscopy. The optical energy band gap and fluorescence feature of Mn–Fe2O3samples were explored through UV–Visible absorption and fluorescence spectroscopies, respectively. The morphology and size of Mn–Fe2O3were determined through field emission scanning electron microscopy (FE-SEM). The influence of Mn3+ion concentration on the magnetic property of Fe2O3was determined. The dye pollutant removal ability of Mn–Fe2O3samples was examined by employing hydrogen peroxide (H2O2)-mediated degradation of Methylene blue (MB) and Congo red (CR) dyes under visible light conditions. The benefit of the Mn-doping process in the photocatalytic property of Fe2O3was discussed.

Published
2024
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