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Dr. Abdulwahed Fahad Alrefaei

Associate Professor

Faculty member in Ecology and Molecular Epidemiology

كلية العلوم
Zoology Department, College of Sciences, ground floor, Office No. AB 58
المنشورات
مقال فى مجلة
2021

A facile and green synthesis of CuO/NiO nanoparticles and their removal activity of toxic nitro compounds in aqueous medium

A., RAMU A., KUMARI M., ELSHIKH M., ALKHAMIS H., ALREFAEI . 2021

In this present work, we report the green synthesis of mixed bimetal oxides (CuO/NiO) for the efficient reduction of toxic nitrophenols (NP, DNP and TNP) in aqueous medium. The CuO/NiO NPs were synthesized by green hydrothermal method combined calcination process. The physiochemical properties of the synthesized CuO/NiO NPs were systematically characterized by using XRD, XPS, FTIR, SEM, and HR-TEM techniques. The calcinated CuO/NiO NPs XRD pattern and SEM morphology show the high crystalline nature than the non-calcinated. Whereas, the XPS and FTIR results confirmed the formation of the metal oxide bonding and the interaction of the bimetals. The HR-TEM images showed the spherical crystals with average particle size about 25 nm. In addition, the SAED pattern confirmed the polycrystalline nature of CuO/NiO NPs. The catalytic reduction of nitro compounds to amino derivative was studied with reducing agent (NaBH4). The CuO/NiO NPs showed the high catalytic activity and completed the reduction reaction of NP, DNP and TNP with in 2, 5 and 10 min respectively. In addition, CuO/NiO NPS exhibited the excellent kinetic rate constant k value about 1.519, 0.5102, 0.4601 min-1 for NP, DNP and TNP respectively. Furthermore, the conversion product aminophenol was observed for these three nitro compounds. The proposed CuO/NiO NPs showed excellent crystal stability after the nitrophenol reduction reactions. An inexpensive CuO/NiO NPs is a promising catalysts for reduction of toxic nitro compounds to useful products in aqueous or non-aqueous medium.

رقم المجلد
271
مجلة/صحيفة
Chemosphere
الصفحات
1-9
مزيد من المنشورات
publications

The current study aimed to examine thymic stromal lymphopoietin receptor (TSLPR) genetic variation and breast cancer (BC) susceptibility in women in Saudi Arabia.

بواسطة SEMLALI A., ALMUTAIRI M., ALHARBI S., AL AMRI A., ALREFAEI A. F., ALMUTAIRI B., & ROUABHIA M.
2021
publications

Methylenetetrahydrofolate reductase (MTHFR) polymorphism plays a fundamental role in susceptibility to various diseases, including cancers and autoimmune diseases.

بواسطة ALMUTAIRI M., AL-NUMAIR, N., PARINE, N., ALMUTAIRI, B., ALREFAEI, A., ROUABHIA M., SEMLALI, A.
2021
publications

Camptothetin (CPT) is a quinoline alkaloid originally isolated from the Chinese tree, Camptotheca acuminata Decne. CPT was found to have anticancerous and antiviral properties.…

بواسطة DEVASIA R., ALTAF M., ALREFAEI A., MANOHARADAS S.
2021