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Nazir Muhammad Altaf,Jamshaid Muhammad,Altaf Muhammad,Najam Tayyaba,Al-Mohaimeed Amal M.,Al-onazi Wedad A.,Rehman Aziz ur,Shah Syed Shoaib Ahmad 한국화학공학회 2024 Korean Journal of Chemical Engineering Vol.41 No.8
This research presents a comprehensive investigation into the synthesis and application of novel composite photocatalysts, namely Mg 0.75 Ce 0.25 Fe 12 O 19 @ZIF-67 for the degradation of Rhodamine B (RhB) dye under sunlight irradiation. The synthesis involved the preparation of Mg 0.75 Ce 0.25 Fe 12 O 19 and ZIF-67 frameworks, followed by the fabrication of the composite catalyst. Various characterization techniques, such as XRD, SEM, EDX, and FTIR, were employed to assess the structural, morphological, and compositional properties of the synthesized materials. Photocatalytic experiments were conducted to evaluate the effi ciency of the catalysts in degrading RhB, revealing remarkable enhancement in degradation effi ciency (90%) using the composite photocatalyst compared to individual components. The eff ects of catalyst type, dosage, and pH on the degradation process were systematically investigated. Furthermore, a proposed mechanism elucidated the role of the Mg 0.75 Ce 0.25 Fe 12 O 19 @ZIF-67 cocatalyst for RhB degradation under solar light, highlighting the generation of radicals as key contributors for degradation process.
Iron doped vanadium sulfide anemone like nanorod structure for electrochemical water oxidation
Swathi S.,Yuvakkumar R.,Ravi G.,S.I. Hong,Babu E. Sunil,Velauthapillai Dhayalan,Algarni Tahani Saad,Al-Mohaimeed Amal M. 한국물리학회 2021 Current Applied Physics Vol.21 No.-
Bare and Fe doped vanadium sulfide nanorods was synthesized by employing sol-gel method. The obtained (011) plane revealed and confirmed the orthorhombic phase of vanadium sulfide (VS). Fe doped vanadium sulfide anemone like nanorods structure were demonstrated by morphological evolution employing SEM studies. FTIR studies confirmed the vibrational frequencies of the prepared samples and identify the functional groups. Raman technique is also used to observe the vibrational modes of molecules and PL revealed the prepared samples optical-electronic nature. Additionally, electrochemical studies such as cyclic voltammetry (CV), linear sweep voltammetry (LSV), electrochemical impedance spectroscopy (EIS) and chronoampherometry (CA) was recorded for determination of specific capacitance, current density and stability. High doped vanadium sulfide has elevated 1372 F/g specific capacitance at 385 mA/g current density attained from CV and LSV curves at 10 mV/s and it has proven the excellent OER activity.