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Rapid photo-degradation of 2-chlorophenol under visible light irradiation using cobalt oxide-loaded TiO.sub.2/reduced graphene oxide nanocomposite from aqueous media
The photocatalytic removal of 2-chlorophenol (2-CP) from water environment was investigated by TiO.sub.2-RGO-CoO. Cobalt oxide-loaded TiO.sub.2 (TiO.sub.2-CoO) supported with reduced graphene oxide (RGO) was synthesized using a sol-gel method and then annealed at 500 [degrees]C for 5 min. The material characteristics were analyzed by UV-Vis analysis, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy. Incorporation of cobalt oxide and RGO into the TiO.sub.2 system (TiO.sub.2-RGO-CoO) lowered the band gap energy to 2.83 eV, which greatly enhanced the visible light absorption. The TiO.sub.2-RGO-CoO photocatalyst showed complete removal of 20 mg/L 2-CP within 8 h with the addition of 0.01% H.sub.2O.sub.2 under 100 W visible light irradiation. The photo-degradation efficiency of 2-CP (10 mg/L) was 35.2, 48.9, 58.9 and 98.2% for TiO.sub.2, TiO.sub.2-RGO, TiO.sub.2-CoO and TiO.sub.2-RGO-CoO, respectively, in the presence of visible light irradiation at solution pH of 6.0. The TiO.sub.2-RGO-CoO photocatalyst retained its high removal efficiency even after five photocatalytic cycles.
Rapid photo-degradation of 2-chlorophenol under visible light irradiation using cobalt oxide-loaded TiO.sub.2/reduced graphene oxide nanocomposite from aqueous media
The photocatalytic removal of 2-chlorophenol (2-CP) from water environment was investigated by TiO.sub.2-RGO-CoO. Cobalt oxide-loaded TiO.sub.2 (TiO.sub.2-CoO) supported with reduced graphene oxide (RGO) was synthesized using a sol-gel method and then annealed at 500 [degrees]C for 5 min. The material characteristics were analyzed by UV-Vis analysis, Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM) and energy dispersive X-ray (EDX) spectroscopy. Incorporation of cobalt oxide and RGO into the TiO.sub.2 system (TiO.sub.2-RGO-CoO) lowered the band gap energy to 2.83 eV, which greatly enhanced the visible light absorption. The TiO.sub.2-RGO-CoO photocatalyst showed complete removal of 20 mg/L 2-CP within 8 h with the addition of 0.01% H.sub.2O.sub.2 under 100 W visible light irradiation. The photo-degradation efficiency of 2-CP (10 mg/L) was 35.2, 48.9, 58.9 and 98.2% for TiO.sub.2, TiO.sub.2-RGO, TiO.sub.2-CoO and TiO.sub.2-RGO-CoO, respectively, in the presence of visible light irradiation at solution pH of 6.0. The TiO.sub.2-RGO-CoO photocatalyst retained its high removal efficiency even after five photocatalytic cycles.
Rapid photo-degradation of 2-chlorophenol under visible light irradiation using cobalt oxide-loaded TiO.sub.2/reduced graphene oxide nanocomposite from aqueous media
Sharma, Ajit (author) / Lee, Byeong-Kyu
2016
Article (Journal)
English
BKL:
43.00
| British Library Online Contents | 2018
| British Library Online Contents | 2015