Dr. Md Abdus Subhan
Dr. Md Abdus Subhan
Shah Jalal University of Science and Technology, Bangladesh
Title: Photocatalytic Properties and Sensor Applications of Multi-Metallic Oxide Nanocomposites for Sustainable Safe Environment
Mixed metal oxides are the combinations of two or more metallic ions with oxygen in appropriate proportions. An appropriate combination of different individual oxides in a nano mixed metal oxide composites, can produce new materials with exceptional structural or electronic properties that can lead to excellent electronic and catalytic activity [1-2]. Mixed metal oxide nanocomposites like B2O3•Zn6Al2O9•ZnO, Fe3O4@Ag@Ni are synthesized by facile co-precipitation and hydrothermal methods and characterized by AFM, XRD, SEM, TEM, EDS, FTIR and photoluminescence (PL) spectroscopic studies. Surface morphologies are investigated by SEM, TEM and AFM studies. The PL behavior of the catalysts are diverse and some of the catalysts are found exhibit excitation wavelength dependent PL. Dye removal efficiency of the composite materials is investigated by the photocatalytic process in aqueous medium under Visible or UV light irradiation using catalytic H2O2. Mixed metal oxide nanocomposites like AgO.ZnO•Fe3O4, MgO•ZnO•Al2O3 as well as APTMS and curcumin coated composites have also been synthesized. Both coated and noncoated nanocomposites have been characterized by AFM, XRD, SEM, EDS, FTIR and PL spectra. The average crystallite size of the Ag-ZnO-Fe3O4, APTMS coated Ag-ZnO-Fe3O4 and curcumin coated Ag-ZnO-Fe3O4 mixed metal oxides are found to be 21.63, 15.33 and 29.74 nm [2]. The catalysts showed excellent photo-catalytic dye degradation efficiency in slightly alkaline pH in presence or absence of catalytic H2O2 [3-4]. Trimetallic oxide nanocomposites particles are found to show an excellent sensor activity to detect hazardous chemicals for environmental protection as well as anti-microbial functions[5,6]. References 1. M. A. Subhan et al., Journal of Luminescence, 146(2014)123–127. 2. M. A. Subhan, N. Uddin, P. Sarker and N. U. Ahmed, Adv. Sci. Eng. Med. 8, 676–688 (2016). 3. M. A. Subhan, N. Uddin, P.Sarker, A.K. Azad and K. Begum, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 149 (2015) 839–850. 4. M. A. Subhan, N. Uddin, P. Sarker, H. Nakata and R. Makioka, Spectrochimica Acta Part A: Molecular and Biomolecular Spectroscopy 151 (2015) 56–63. 5. M. A. Subhan, P. C. Saha, M.M. Rahman, M. A. R. Akand, A.M. Asiri and M. A. Mamun, New J.Chem., 2017, 41, 7220. 6. M. A. Subhan et. al., New J.Chem., 2018, 42, 872.
Dr. Md Abdus Subhan obtained his PhD from Osaka University, Japan in March 2003. In 2004 he had been a Venture Business Laboratory (VBL) postdoctoral fellow at Materials and Life science, Faculty of Engineering, Osaka University for a year. Then he joined Shah Jalal University of Science and Technology, Sylhet, Bangladesh as faculty. In 2010 and 2017 he visited Osaka Kyoiku University, Japan as visiting Professor and studied the PL properties of mixed metal nano composite oxides. He had been National Research Foundation (NRF) postdoctoral fellow at Andong National University, South Korea for a year (2010–2011), where he studied novel macrocyclic metal complexes. He had been BK21 postdoctoral fellow at Seoul National University, South Korea for six months (2012–2013). At present he is a Professor and Head of Department Chemistry at Shah Jalal University of Science and Technology, Sylhet, Bangladesh. His major research field includes novel metal complexes of materials, medicinal and biological importance as well as structure, spectroscopy, catalysis and photocatalysis, anti-microbial activity of multi-metal nanocomposite oxides. He has received TWAS research Grant Award 2015; MOST (Ministry Of Science and Technology) Bangladesh Research Grant 2015-1016; SUST Research Grant 2013, 2015 and 2017; MOE (Ministry of Education) Bangladesh Research Grant 2014-1015. Recently he has received VC Award 2015, Excellent Article Award 2016 from Chinese Academy of Metals and Best Paper Award 2014 from United Group. Dr. Subhan is a Life member of Bangladesh Chemical Society (LM 1095) and a member of American Chemical Society. He has published 61 papers in peer reviewed international journals. He has been working as regular reviewer of several high impact journals of Elsevier Science Publications and Royal Society of Chemistry. He has also been editorial Board member of some international journals.