Surface, optical and photocatalytic properties of silica-supported TiO 2 treated with electron beam

Wroński, P.; Surmacki, Jakub; Abramczyk, Halina; Adamus, Agnieszka; Nowosielska, Magdalena; Maniukiewicz, Waldemar; Kozanecki, Marcin; Szadkowska–Nicze, M.

doi:10.1016/j.radphyschem.2014.12.009

Cited by 11 publications

(3 citation statements)

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“…After the irradiation with gamma rays (0.8 MGy) of the catalysts based on CuO/MgO and NiO/MgO, the rate of decomposition of hydrogen peroxide increased several times [7]. A significant number of studies are devoted to the investigation of the activation process of heterogeneous catalysts by irradiating them with a stream of accelerated high-energy electrons up to 15 MeV generated with the help of an electronic accelerator [13,14]. Under the influence of a beam of accelerated electrons, both on the surface and in the depth of the catalyst, a number of processes take place; they lead to the activation of chemical bonds and the formation of defects on the surface and in the volume of the solid-state body.…”

Section: Introductionmentioning

confidence: 99%

“…In addition, it was found that the concentration of active centers such as Ni 2+ and NiO or surface defects increases with an increase in the dose of absorbed radiation, thereby increasing the conversion rate. Silica-supported titanium dioxide was irradiated in the range of 100-1000 kGy and the photoactivity of this catalyst in the decomposition reaction of azo-dyes increased with the increase in the irradiation dose to 250 kGy [14]. Supported (graphitized carbon, aluminum oxide, titanium) Pd catalysts after the irradiation using an electronic accelerator (1.2-9.0 MGy) were studied in the toluene hydrogenation reaction (in the liquid and gaseous phase).…”

Section: Introductionmentioning

confidence: 99%

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Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

et al. 2019

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This study considers the effect of various doses of electron irradiation on the crystal structure and properties of composite catalysts based on polyethylene terephthalate track-etched membranes and copper nanotubes. Copper nanotubes were obtained by electroless template synthesis and irradiated with electrons with 3.8 MeV energy in the dose range of 100–250 kGy in increments of 50 kGy. The original and irradiated samples of composites were investigated by X-ray diffraction technique (XRD), scanning electron microscopy (SEM) and atomic force microscopy (AFM). The improved catalytic activity of composite membranes with copper nanotubes was demonstrated by the example of the reduction reaction of p-nitrophenol in the presence of sodium borohydride. Irradiation with electrons at doses of 100 and 150 kGy led to reaction rate constant increases by 35 and 59%, respectively, compared to the non-irradiated sample. This enhancing catalytic activity could be attributed to the changing of the crystallite size of copper, as well as the surface roughness of the composite membrane.

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Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Electron Beam Induced Enhancement of the Catalytic Properties of Ion-Track Membranes Supported Copper Nanotubes in the Reaction of the P-Nitrophenol Reduction

et al. 2019

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“…It has been found that the activity of the irradiated solid is a function of its surface area. It is concluded that during EB treatment, formation of defects in the bulk and on the surface of irradiated crystals occurs (Wronski et al, 2015). It is believed that the energy of the radiation creates displacements and dislocations in the irradiated solid, which converts the solid into a form that is more catalytically active (James, 1961).…”

Section: E -+ N H 2 O → Eaqmentioning

confidence: 99%