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Synthesis and charecterization of copper-doped nickle oxide nanophotocatalysts for degradation of erichrome black-t and methylene blue
(University of Management and Technology Lahore, 2016) Ahmad, Zaheer
To improve the photocatalytic activity of NiO nanoparticles, Cu doped NiO nanoparticles were synthesized by chemical co-precipitation method. The UV-Visible spectroscopy was used to measure the photocatalytic activity. The nanoparticles were characterized by XRD, DRS and FT-IR. XRD results showed that the peaks were broadened by introduction of Cu. XRD measurements showed that the peak intensity was decreased as nickel onide nanoparticles were doped with copper. The peak broadness in XRD spectra for doped particles showed the loss of crystallinity. The size of CuO, NiO and Cu doped nickel oxide as calculated by Sherrer’s fomula were 11.3 nm, 9.1 nm and 2.4 nm respectively. FT-IR spectra for doped NiO nanoparticles showed that no extra peak was appeared. The DRS spectra indicated that band gap decrease due to cu doping of NiO nanoparticles lead the enhancement of activity of photocatalytic degradation. Degradation of methylene blue MB and erichrome Black-T under visible light was applied to appraise the photocatalytic activity. When NiO nanoparticles were doped with CuO nanoparticles, the band gap was shifted to lesser value of 2.08 eV than 2.29 eV for pure NiO nanoparticles. Lowering band gap will be responsible for degradation of dyes.