Open AccessPhotocatalytic degradation of heavy metal in dairy milk by N-doped ZnO thin film using spray coating technique
Author(s) -
Nurul Pratiwi,
M. I. Ilsatoham,
M. Z. Asror,
Heri Sutanto
Publication year - 2020
Publication title -
iop conference series. materials science and engineering
Language(s) - English
Resource type - Journals
eISSN - 1757-899X
pISSN - 1757-8981
DOI - 10.1088/1757-899x/850/1/012046
Subject(s) - materials science , thin film , doping , photocatalysis , zinc , fourier transform infrared spectroscopy , metal , chemical engineering , metallurgy , nanotechnology , optoelectronics , chemistry , catalysis , organic chemistry , engineering
Zinc Oxide (ZnO) is a photocatalytic material. N-doped ZnO thin film can reduce heavy metals in milk. In the process, N-doped ZnO thin film photocatalyst is deposited on the glass by spray coating technique. N-doped ZnO thin film was characterized using UV-Vis (Ultraviolet/Visible Spectroscopy), X-Ray Diffraction (XRD) and FTIR (Fourier Transform Infrared). This study aims to investigate the reduction of heavy metals in milk due to N-doped ZnO thin film. In this study, dairy milk was obtained from farms in Central Java. Characterization results show that the band gap of N-doped ZnO thin film is 3.2 eV that N- doped ZnO thin film can function under visible light. Photocatalytic activity of prepared N-doped ZnO thin film was evaluated by the degradation of heavy metals in dairy milk. Duration of N-doped ZnO thin film degradation was found to vary from 0, 60, and 120 to 180 minutes. Heavy metal content in dairy milk is 0.5775 ppm. Addition of N-doped ZnO thin film to dairy milk reduced heavy metal content to 0.0053 ppm. In can then be inferred that heavy metal degradation using N-doped ZnO thin film is by as much as 89-99 %.