Effect of 8 MeV electron beam irradiation on the structural and optical properties of CeO 2 nanoparticles

Improvement of NO2 Sensing Properties in Pd Functionalized Reduced Graphene Oxides by Electron-Beam Irradiation

“…For Pd-RGO-0, Pd-RGO-100, and Pd-RGO-500, the peak positions of the (002) plane are located at 26.02 • , 26.33 • , and 26.77 • , respectively, which is in accordance with the (002) plane of graphite as a raw material (Yeung et al, 2008). It has been reported that the interplanar spacing is proportional to the degree of oxidation (Xu et al, 2011) and the compressive residual strain (Babitha et al, 2014). Due to the generation of oxygen-functional groups between the layers, the d-spacing of RGO can be increased and the presence of strain will result in a decrease in the interplanar spacing (Xu et al, 2011;Babitha et al, 2014).…”

“…It has been reported that the interplanar spacing is proportional to the degree of oxidation (Xu et al, 2011) and the compressive residual strain (Babitha et al, 2014). Due to the generation of oxygen-functional groups between the layers, the d-spacing of RGO can be increased and the presence of strain will result in a decrease in the interplanar spacing (Xu et al, 2011;Babitha et al, 2014). As observed here, the peak positions are shifted to higher angles after irradiation with an electron beam, resulting in a slight decrease in the lattice spacing.…”

Structural Modifications and Extended Spectral Response of CeO2/CoPc Nanocomposites for Potential Applications

“…Samples S1 and S2 show very good absorption in the regions 200–300 nm, centered on 240 nm. The absorption of CeO 2 in the UV region originates from the charge‐transfer transition between the O 2p and Ce 4f states in O 2− and Ce 4+ . The intense bands in the regions 300–400 nm (Soret band) and 650–700 nm (Q band) correspond to absorption peaks of metal phthalocyanines.…”

“…CoPc (1 wt%) dissolved in a solvent mixture containing 50% dimethyl sulphoxide, 30% dimethyl formamide, and 20% ethanol, at 60°C. CeO 2 nanoparticles prepared by precipitation method were described elsewhere . The required amount of synthesized CeO 2 was gradually added to this solution under constant stirring and heating, resulting in a suspension with homogeneous appearance.…”

Модификация Наночастиц Оксида Церия При Облучении Ускоренными Электронами

“…Систематические исследования в области управления кислородной нестехиометрией наночастиц оксида церия отсутствуют. Опубликованы отдельные работы по модификации наночастиц CeO 2 разными методами: с помощью отжига оксидов в восстановительных или нейтральных средах [11,13], легирования матрицы [14], облучения ионизирующим излучением [15][16][17]. В ряде работ отмечают возможность создания кислородных вакансий и изменения люминесцентно-оптических свойств материалов.…”