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107. Photocatalytic Dye Degradation and Bio-Insights of Honey-Produced α-Fe 2 O 3 Nanoparticles.

Author

Sharmila, Mohamed, Mani, Ramasamy Jothi, Parvathiraja, Chelliah, Kader, Sheik Mohammed Abdul, Siddiqui, Masoom Raza, Wabaidur, Saikh Mohammad, Islam, Md Ataul, and Lai, Wen-Cheng

Subjects
IRON oxide nanoparticles, PHOTODEGRADATION, SCANNING electron microscopes, NANOPARTICLES, FOURIER transform infrared spectroscopy, HONEY, IRON oxides
Abstract

Iron oxide nanoparticles are produced using simple auto combustion methods with honey as a metal-stabilizing and -reducing agent. Herein, α-Fe2O3 nanoparticles are produced using an iron nitrate precursor. These prepared samples are analyzed by an X-ray diffractometer (XRD), FTIR spectroscopy, UV-DRS, and a field-emission scanning electron microscope (FESEM) combined with energy-dispersive spectroscopy and a vibrating sample magnetometer (VSM). The XRD results confirm a rhombohedral structure with an R3 c ¯ space group single-phase formation of α-Fe2O3 in all samples. FESEM images reveal the different morphologies for the entire three samples. TEM analysis exhibits spherical shapes and their distribution on the surfaces. XPS spectroscopy confirms the Fe-2p and O-1s state and their valency. The VSM study shows strong ferromagnetic behavior. The prepared α-Fe2O3 nanoparticles exhibit exceptional charge carriers and radical production. The prepared sample retains excellent photocatalytic, antifungal and antibacterial activity. [ABSTRACT FROM AUTHOR]

Published
2022
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114. The Enhanced Energy Density of rGO/TiO 2 Based Nanocomposite as Electrode Material for Supercapacitor.

Author

Anandhi, Palani, Harikrishnan, Santhanam, Senthil Kumar, Veerabadran Jawahar, Lai, Wen-Cheng, and Mahmoud, Alaa El Din

Subjects
ENERGY density, NANOCOMPOSITE materials, TITANIUM dioxide, GRAPHENE oxide, CYCLIC voltammetry
Abstract

TiO2 electrode material is a poor choice for supercapacitor electrodes because it has low conductivity, poor cyclic stability, and a low capacitance value. It is inevitable to enhance electrode materials of this kind by increasing the surface area and combining high electronic conductivity materials. In the current research work, it was proposed to combine reduced graphene oxide (rGO) as it might provide a large surface area for intercalation and deintercalation, and also, it could establish the shorter paths to ion transfer, leading to a reduction in ionic resistance. The size, surface morphology, and crystalline structure of as-prepared rGO/TiO2 nanocomposites were studied using HRTEM, FESEM, and XRD, respectively. Using an electrochemical workstation, the capacitive behaviors of the rGO/TiO2 electrode materials were assessed with respect to scan rate and current density. The capacitances obtained through cyclic voltammetry and galvanostatic charge-discharge techniques were found to be higher when compared to TiO2 alone. Furthermore, the as-synthesized nanocomposites were able to achieve a higher energy density and better cycle stability. [ABSTRACT FROM AUTHOR]

Published
2022
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