Open AccessLanthanum Doped Strontium Titanate Nanomaterial for Photocatalytic and Supercapacitor Applications
Author(s) -
V.V. Deshmukh,
H.P. Nagaswarupa,
C.R. Ravikumar,
Manjeet Kumar,
T.R. Shashi Shekhar,
H. C. Ananda Murthy
Publication year - 2020
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2020.22725
Subject(s) - strontium titanate , rhodamine b , materials science , cyclic voltammetry , perovskite (structure) , nanomaterials , scanning electron microscope , titanate , photocatalysis , chemical engineering , nanoparticle , lanthanum , malachite green , nuclear chemistry , analytical chemistry (journal) , nanotechnology , chemistry , inorganic chemistry , ceramic , electrode , electrochemistry , thin film , composite material , biochemistry , organic chemistry , adsorption , chromatography , engineering , catalysis
We report the synthesis of lanthanum doped strontium titanate (Sr1-xLaxTiO3,x=0.1) by sol-gel method.The physical properties of the as-synthesized sample were systematically studied through X-ray powderdiffraction (XRD), scanning electron microscopy (SEM), transmission electron microscopy (TEM)and energy dispersive X-ray spectroscopy (EDAX). Diffraction peaks in XRD supported the cubicformation of perovskite-type crystal structure. The image analysis of nanomaterial by SEM and TEMtechniques disclosed aggregates of nanoparticles with grain size about 20 nm. The study by UV-DRSexposed the band energy gaps (Eg) of 3.4 eV for strontium titanate nanoparticles, respectively. Thedegradation studies for three days were carried out for three dyes. Malachite green and rhodamineblue, strontium titanate nanoparticles showed utmost photocatalytic activity for rhodamine blue underUV light irradiation (from 0 to 80 min) as compared to malachite green. Properties of electrochemistrywere looked into by cyclic voltammetry and galvanostatic charge/discharge in 1M KCl electrolyte.The Sr0.9La0.1TiO3 electrode displayed maximal specific capacitance of 306.74 F g-1 at current 1mAfrom galvanostatic charge-discharge curve. The rare earth doped perovskite Sr0.9La0.1TiO3 nanomaterialexhibited increased surface area with superior supercapacitance property.