The unique features of reduced graphene oxide (rGO) enable their applications in the field of photocatalysis as well as unique electrical properties. In the present research work, a novel series of Nb doped CeO2 decorated with rGO (2, 8 and 12 wt %) were synthesized by hydrothermal method. The structural and morphological features of nanomaterials (NMs) investigated by using different analytical techniques namely, XRD (X-ray diffraction), UV-visible, SEM (scanning electron microscopy), EDX (energy dispersive X-ray), XPS (X-ray photoelectron spectroscopy), BET (Brunauer-Emmett-Teller). The XRD analysis present polycrystalline mixed phase of tetragonal/cubic crystal structure and microstructure analysis showed flower shaped morphology having mesoporous nature. The addition of rGO results in the increased specific surface area and pore diameter. Redshift in optical absorbance results with decrease in direct optical band gap as rGO concentration increases in NMs. The EDX/XPS studies showed the chemical composition and oxidation states of elements NB, Ce, O, C in NMs. Zeta potential studies showed increased poly disparity with increase in the mobility of the NMs. The zeta potential varies from 88.1 mV to 110.8 mV as the rGO concentration increases on bimetallic oxide NMs. Further, Photocatalytic dye degradation studies of  rGO (2, 8 and 12 wt %): Nb2O3@CeO2 against Methylene blue (NM), Rodhamaine B (RB) and Sudan 1 dye showed increased photocatalytic activity. The Photocatalytic performances increase with increase in rGO concentration on bimetallic oxide NMs. The findings of the present work can be better candidate for photocatalytic and an excellent material for charge transport capability. 

Fifteen years of research experience as senior Scientist, associate research scientist in R&D organizations of TATA, Astra Zeneca India, Trans Chem Ltd. Overseas Research Fellow of Nanyang Global Research Center, Bangkok, Malaysia. Published more than 150 research articles, and 15 Books/several book chapters in Scopus, Q-ratted journals with high impact factor, attended and presented papers in National and International Conferences as Key note speaker, distinguished speaker, Chaired/ Key note speaker/Organizing secretory, Editor for International and National conferences, Editorial Board Member, Life Member of many international societies. Editor of the special issues published in springer, Elsevier and Wiley. Research interest includes, Optoelectronics, Material Chemistry, Sensors and Actuators, Bio Nanomaterials, Medicinal Chemistry.