Open AccessStructural and optical study of Cu-doped TiO2 nanoparticles synthesized by co-precipitation method
Author(s) -
H Sokoidanto,
Ardiansyah Taufik,
Rosari Saleh
Publication year - 2020
Publication title -
journal of physics. conference series
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.21
H-Index - 85
eISSN - 1742-6596
pISSN - 1742-6588
DOI - 10.1088/1742-6596/1442/1/012008
Subject(s) - dopant , materials science , spectroscopy , electron paramagnetic resonance , analytical chemistry (journal) , coprecipitation , diffuse reflectance infrared fourier transform , band gap , fourier transform infrared spectroscopy , tetragonal crystal system , doping , anatase , infrared spectroscopy , crystallography , chemistry , nuclear magnetic resonance , inorganic chemistry , photocatalysis , crystal structure , chemical engineering , biochemistry , physics , optoelectronics , organic chemistry , quantum mechanics , chromatography , engineering , catalysis
In this study, we synthesized Cu-doped TiO 2 nanoparticles using a coprecipitation method, with chemical TiO 2 as the base material and CuSO 4 .5H 2 O as a dopant precursor. To characterize their compositional, structural, optical, and paramagnetic properties, we employed energy dispersive X-ray spectroscopy, X-ray diffraction spectroscopy, Fourier transform infrared spectroscopy, diffuse reflectance UV-Visible spectroscopy, and electron spin resonance (ESR) spectroscopy. The outcome of the research study showed the samples to have a tetragonal anatase structure with grain sizes of 52-54 nm. The secondary CuO phase in the 6 at.% and 12 at.% samples showed a Cu solubility limit in their TiO 2 lattice, which also influences the lattice parameters. We observed band-gap narrowing with an increasing concentration of the Cu dopant, as indicated by the redshift on the reflectance band edge. Substituting Ti with Cu atoms led to the detection of a paramagnetic species by ESR spectroscopy.