Estimation of neutron-irradiation-induced defect in 3C–SiC from change in XRD peak shift and DFT study

Sawabe, Takashi; Akiyoshi, Masafumi; Yoshida, Katsumi; Yano, Toyohiko

doi:10.1016/j.jnucmat.2010.12.180

Cited by 49 publications

(14 citation statements)

References 31 publications

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“…It was also noticed that the peaks in the spectrum of 10% Coe2%Ce/ZrO 2 catalyst shifted to lower 2q values indicating expansion of interplanar spacing [27] as also shown with dspacing values in Table 1. This might be attributed to lattice mismatching and/or distortion [28] due to more lattice oxygen vacancies in this sample [29].…”

Section: Characterization Of Coece/zro 2 Systemsupporting

confidence: 58%

The effects of Co/Ce loading ratio and reaction conditions on CDRM performance of Co Ce/ZrO2 catalysts

Paksoy

Çağlayan

Özensoy

et al. 2018

International Journal of Hydrogen Energy

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This work mainly aims to establish a link between Co/Ce loading ratio in CoeCe/ZrO 2 catalysts and their Carbon Dioxide Reforming of Methane (CDRM) performance. In this context, catalysts with different Co and Ce loadings were prepared and characterized via BET, XRD, HRTEM-EDX, XPS and Raman, and parametrically tested under different CDRM conditions. Dispersion of Co particles was nonhomogeneous on all samples. For the sample with the highest Co/Ce ratio (10%Coe2%Ce/ZrO 2), higher amount of lattice oxygen vacancies and lowest degree of ceria reduction were determined. Raman analysis showed that graphitic carbon coexisted with amorphous carbon on the surface of all spent samples. The extent of side reactions prevailed in determining selectivity. It was expressed that both CoeCe synergistic interaction and synchronous contribution of Ce and ZrO 2 were enhanced for the samples having lower Co/Ce ratio. It was confirmed that Ce is only responsible for oxygen transfer but not its formation.

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Section: Characterization Of Coece/zro 2 Systemsupporting

confidence: 58%

The effects of Co/Ce loading ratio and reaction conditions on CDRM performance of Co Ce/ZrO2 catalysts

Paksoy

Çağlayan

Özensoy

et al. 2018

International Journal of Hydrogen Energy

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“…The pre-wash results indicate that increased NaCl content in the samples generally shifted the NaCl peak from 31.2 to 31.4 and 31.7 • , i.e., from left to right, for 5, 10, and 20%-NaCl content, respectively. This shifting of the peak to a lower angle indicates expansion of the space lattice [45,46]. In the BET surface area analysis discussed above (Section 3.2.1.…”

Section: X-ray Diffraction Analysismentioning

confidence: 93%

Influence of NaCl Concentration on Food-Waste Biochar Structure and Templating Effects

Lee

Kim

et al. 2018

Energies

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Food-waste-derived biochar structures obtained through pyrolysis and with different NaCl concentrations were investigated. Increased NaCl concentration in the samples inhibited cellulose and lignin decomposition, ultimately increasing the biochar yield by 2.7% for 20%-NaCl concentration. NaCl added in solution state exhibited templating effects, with maximum increases in the Brunauer–Emmett–Teller (BET) surface area and pore volume of 1.23 to 3.50 m2∙g−1 and 0.002 to 0.007 cm3∙g−1, respectively, after washing. Adding a high concentration (20%) of NaCl reduced the BET surface area. In contrast, the mean pore diameter increased owing to the increased NaCl clustering area. Increased NaCl clustering with increased added NaCl was shown to have positive effects on NaCl removal by washing. Furthermore, as the NaCl adhered to the KCl scattered in the food waste, a high NaCl concentration also had positive effects on KCl removal. This study reports on an investigation on the effects of varying NaCl concentrations injected in solution form on the structure of food-waste biochar during pyrolysis. The templating effect was considered using both added NaCl and NaCl already contained in the food waste, with implementation of a desalination process essential for food-waste treatment for recycling.

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“…3. With an increase in temperature, the position of the (002) peak gradually shifts towards a lower 2θ value, which may be due to the lattice mismatch of the (002) surface or the in-situ growth of some defects [53]. In contrast, the (100) peak does not change, indicating that the increase in temperature has no effect on the (100) surface.…”

Section: Gas Distribution and Pneumatic Control Box Gas Gasmentioning

confidence: 98%

Thermo-driven photocatalytic CO reduction and H2 oxidation over ZnO via regulation of reactant gas adsorption electron transfer behavior

Wang

et al. 2021

Chinese Journal of Catalysis

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Photothermal catalysis is a widely researched field in which the reaction mechanism is usually investigated based on the photochemical behavior of the catalytic material. Considering that the adsorption of reactants is essential for catalytic reactions to occur, in this study, the synergistic effect of photothermal catalysis is innovatively elucidated in terms of the electron transfer behavior of reactant adsorption. For the H2 + O2 or CO + H2 reaction systems over a ZnO catalyst, UV irradiation at 25 °C or heat without UV irradiation did not cause H2 oxidation or CO reduction; only photothermal conditions (100 or 150 °C + UV light) initiated the two reactions. This result is related to the electron transfer behavior associated with the adsorption of CO or H2 on ZnO, in which H2 or CO that lost an electron could be oxidized by O2 or hydroxyls. However, the electron-accepting CO could be reduced by the electron-donating H2 into CH4 under photothermal conditions. Based on the in-situ characterization and theoretical calculation results, it was established that the synergistic effect of the photothermal conditions acted on the (002) crystal surface of ZnO to stimulate the growth of zinc vacancies, which resulted in the formation of defect energy levels, adsorption sites, and an adjusted Fermi level. As a result, the electron transfer behavior between adsorbed CO or H2 and the crystal surface varied, which further affected the photocatalytic behavior. The results show that the effect of photothermal synergy may not only produce the expected kinetic energy, but more importantly, produce energy that can change the activation mode of the reactant gas. This study provides a new understanding of the CO catalytic oxidation and reduction processes over semiconductor materials.

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Estimation of neutron-irradiation-induced defect in 3C–SiC from change in XRD peak shift and DFT study

Cited by 49 publications

References 31 publications

The effects of Co/Ce loading ratio and reaction conditions on CDRM performance of Co Ce/ZrO2 catalysts

The effects of Co/Ce loading ratio and reaction conditions on CDRM performance of Co Ce/ZrO2 catalysts

Influence of NaCl Concentration on Food-Waste Biochar Structure and Templating Effects

Thermo-driven photocatalytic CO reduction and H2 oxidation over ZnO via regulation of reactant gas adsorption electron transfer behavior

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