Abstract
The development of waste-derived heterogeneous catalysts can offer substantial savings in manufacturing costs and reduces disposal costs. Herein, we have developed waste iron oxide nanopowder having 7.6 wt.% of titanium dioxide (IOW-9 h) from industrial waste materials adopting a simple cost-effective planetary wet ball milling technique. Most prominently, the IOW-9 h nanopowder was obtained without using any chemical treatment with an average size distribution of ∼10 nm. IOW-9 h was characterized by several sophisticated analytical instruments like powder X-ray diffractogram (XRD), X-ray photoelectron spectrometer (XPS), high-resolution transmission electron microscope (HRTEM), field emission scanning electron microscope (FESEM), vibrating sample magnetometer (VSM), Raman spectroscopy, Fourier transform infrared (FT-IR), fluorescence spectrophotometer and zeta potential analyzer. IOW-9 h nanopowder was utilized towards the photocatalytic degradation of model dye molecules, inactivation of bacteria cells and decolorization of tannery wastewater under sunlight irradiation. The formation of degradation intermediates for dye molecules was also studied by HR-MS analysis at different time intervals. IOW-9 h nanopowder showed a better recyclable capability of 78 % upto 10 cycles through photocatalytic dye degradation. Further, we characterized the IOW-9 h nanopowder after use in the photocatalytic degradation process. There are no significant changes in morphology after the use of the IOW-9 h nanopowder as a photocatalyst.
Published Version
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