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Integrated ternary nanocomposite of TiO^sub 2^/NiO/reduced graphene oxide as a visible light photocatalyst for efficient degradation of o-chlorophenol
This study investigated a novel approach for the synthesis of an integrated ternary nanocomposite which could act as a good photo-catalyst under visible light irradiation for the removal of organic pollutants from aqueous environments. The photo-catalyst included nickel oxide (NiO) as a dopant, and reduced graphene oxide (RGO) as a good carbon basal support for enhancement of the photo-catalytic activity of TiO^sub 2^. Under irradiation with visible light, the ternary nanocomposite (TiO^sub 2^/NiO-RGO) system generates e-/h+ pairs, and then reacts with H^sub 2^O and O^sub 2^- molecules to produce oxy-radicals which can be used for the mineralization of o-chlorophenol from aqueous solution. The characteristic of all photo-catalysts were investigated by UV-Vis analysis, with surface area and pore size measurements by Brunauer-Emmett-Teller (BET), crystallinity by X-ray diffraction (XRD), elemental composition by X-ray photoelectron spectroscopy (XPS), and morphology by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX). The functional groups were measured by Fourier transform infrared (FT-IR) spectroscopy before and after o-chlorophenol degradation. TiO^sub 2^/NiO-RGO was capable of achieving 88.4% photo-degradation of 100 mg/L o-chlorophenol (100 mL) within 8 h with addition of 0.01% H^sub 2^O^sub 2^ under visible light irradiation at pH 6.5. The photo-degradation followed a pseudo-first-order reaction. The TiO^sub 2^/NiO-RGO nanocomposite retained its high removal efficiency, even after four photo-catalytic cycles. [web URL: http://www.sciencedirect.com/science/article/pii/S0301479716304534]
Integrated ternary nanocomposite of TiO^sub 2^/NiO/reduced graphene oxide as a visible light photocatalyst for efficient degradation of o-chlorophenol
This study investigated a novel approach for the synthesis of an integrated ternary nanocomposite which could act as a good photo-catalyst under visible light irradiation for the removal of organic pollutants from aqueous environments. The photo-catalyst included nickel oxide (NiO) as a dopant, and reduced graphene oxide (RGO) as a good carbon basal support for enhancement of the photo-catalytic activity of TiO^sub 2^. Under irradiation with visible light, the ternary nanocomposite (TiO^sub 2^/NiO-RGO) system generates e-/h+ pairs, and then reacts with H^sub 2^O and O^sub 2^- molecules to produce oxy-radicals which can be used for the mineralization of o-chlorophenol from aqueous solution. The characteristic of all photo-catalysts were investigated by UV-Vis analysis, with surface area and pore size measurements by Brunauer-Emmett-Teller (BET), crystallinity by X-ray diffraction (XRD), elemental composition by X-ray photoelectron spectroscopy (XPS), and morphology by scanning electron microscopy with energy dispersive X-ray spectroscopy (SEM/EDX). The functional groups were measured by Fourier transform infrared (FT-IR) spectroscopy before and after o-chlorophenol degradation. TiO^sub 2^/NiO-RGO was capable of achieving 88.4% photo-degradation of 100 mg/L o-chlorophenol (100 mL) within 8 h with addition of 0.01% H^sub 2^O^sub 2^ under visible light irradiation at pH 6.5. The photo-degradation followed a pseudo-first-order reaction. The TiO^sub 2^/NiO-RGO nanocomposite retained its high removal efficiency, even after four photo-catalytic cycles. [web URL: http://www.sciencedirect.com/science/article/pii/S0301479716304534]
Integrated ternary nanocomposite of TiO^sub 2^/NiO/reduced graphene oxide as a visible light photocatalyst for efficient degradation of o-chlorophenol
Ajit Sharma (author) / Byeong-Kyu Lee
2016
Article (Journal)
English
BKL:
43.00
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