Aerosol spray assisted synthesis of Ni doped BaTiO3 hollow porous spheres | Waleed M

Summary :
⁣A key challenge in photoelectrochemical water splitting is to fabricate nanostructured photoelectrodes with desirable properties. Herein, Ni doped BaTiO3 hollow spheres (HS) supported on reduced graphene oxide (RGO) nanocomposite were successfully synthesized by aerosol spray drying method. Former spheres consisted of small nanoparticles with size 5-20 nm possessing high porosity and large area. Characterizations were done by X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), high-resolution transmission electron microscopy (HRTEM), and field emission scanning electron microscopy (FESEM). Ni doped BaTiO3 HS/RGO nanocomposites as photoanodes exhibited an enhanced photoelectrochemical performance and long-term stability compared to BaTiO3 HS and BaTiO3 HS/RGO. The photocurrent density of Ni doped BaTiO3 HS/RGO photoanode revealed 8.14 μA/cm2 which is 37% more than BaTiO3 HS. From electrochemical impedance spectroscopy (EIS) analysis, Ni doped BaTiO3 HS/ RGO exhibited the lowest charge transfer resistance in comparison with BaTiO3 HS and BaTiO3 HS/ RGO which leads to enhancement in the electrocatalytic activity


About Author :
⁣Waleed M. A. El Rouby received his MSc and PhD degrees from Beni-Suef University, Egypt in May 2008 and November 2011 respectively. In September 2013 he worked as assistant professor at Beni-Suef University, Egypt. In September 2015 he got Erasmus Munds postdoctoral fellowship at Universidade de Vigo, Spain. In December 2017, he got a postdoctoral position for 2 years at Institut de Chimie Moléculaire et des Matériaux d’Orsay, Recherche et Innovation en Electrochimie pour l’Energie, Université Paris-Sud, France. Now, he is associate professor and head of Materials Science and Nanotechnology at Faculty of Postgraduate Studies for Advanced Sciences, Beni-Suef University. He is the co-chair of publishing unit at Beni-Suef University. His research work is focusing on elaboration of different morphological nanomaterials for different purposes such as water splitting, methanol electrooxidation, water treatment, photocatalysis and sensing applications. He has more than 60 international peer reviewed publications and participation in 18 conferences. He has participated in the organization of more than 12 international conferences and workshops.