Titanium dioxide (TiO2) powder was synthesized via the solvothermal method. Titanium isopropoxide (C12H28O4Ti), ammonium hydroxide (NH4OH) and nitric acid (HNO3) were used as the starting materials. The mixed solution was diluted with ethanol (C2H5OH) and heated at 100°C for 5h in a Teflon–lined stainless steel autoclave vessel. The phase transition of TiO2 powder was studied by X–ray diffraction (XRD). The morphology and chemical composition of TiO2 powder were investigated by scanning electron microscopy (SEM) and energy dispersive spectroscopy (EDS). The photocatalytic degradation of methylene blue and methyl orange over TiO2 powder were determined using Ultraviolet–visible spectroscopy (UV–Vis).
Titanium dioxide (TiO 2 ) powder was prepared by the solvothermal method. Titanium isopropoxide (C 12 H 28 O 4 Ti), ammonium hydroxide (NH 4 OH) and nitric acid (HNO 3 ) were used as the starting materials. The mixed solution was diluted to 0.25 M with ethanol (C 2 H 5 OH) and heated at 100°C-150°C for 3-5 h in a Teflon-lined stainless steel autoclave vessel. TiO 2 powder was characterised with X-ray diffraction (XRD), scanning electron microscopy (SEM) and energy dispersive spectrometry (EDS). The photocatalytic degradation of phenol over TiO 2 powder under UV light irradiation was studied. The influence of the amount of TiO 2 powder and irradiation time was investigated. The concentration of phenol was measured using UV-VisThe photocatalytic degradation of phenol over titanium dioxide powder 45 spectrometry (UV-Vis). The optimum condition was obtained at 1.0 g.L -1 for the amount of TiO 2 powder and irradiation time was 120 min. It was found that TiO 2 powder prepared by the solvothermal method at 100°C for 3 h has the best performance photocatalytic for degradation of phenol.
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