Raman spectra have been obtained for La 2 O 3 dispersed on Al 2 O 3 , but only after La 2 O 3 coverages reach one theoretical monolayer or higher. Sharp peaks at 104, 191, and 408 cm −1 were observed, which are in excellent agreement with previous studies of bulk La 2 O 3 ...
IR and Raman spectra (solids and liquids)ChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 100 leading journals. To access a ChemInform Abstract of an article which was published elsewhere, please select a "Full Text" option. The...
Infrared & Raman spectroscopy 1. Introduction Radiation sources threaten human health and the integrity of sensitive equipment, necessitating effective shielding materials [1]. Exposure to X-rays, gamma rays, and neutrons impacts both the environment and living organisms [2]. Glass materials have garne...
RamanThe effect of triethylene glycol on phosphate-doped Co(Zn)Mo catalysts supported on 纬-Al2O3 was studied by means of 31P magic angle spinning nuclear magnetic resonance (MAS NMR) and Raman spectroscopy. 31P MAS NMR experiments, carried out on ZnMo/纬-Al2O3 doped with phosphate and ...
The incorporation of SrO also modified the reducibility (H-2-TPR) of the catalysts. VOx appeared as amorphous polymeric species on the support, confirmed by XRD, Raman and FTIR analyses. The oxidative cracking of n-hexane was conducted by using a fluidized CREC Riser Simulator in absence of ...
Cobalt catalysts were prepared on supports of SiO2 and γ-Al2O3 by the impregnation method, using a solution of Co precursor in methanol. The samples were characterized by XRD, TPR, and Raman spectroscopy and tested in ethanol steam reforming. According to the XRD results, impregnation with ...
Laser Raman spectroscopy (LRS), X-ray diffraction (XRD), X-ray photoelectron spectroscopy (XPS), ultraviolet and diffuse reflectance spectroscopy (UV-DRS), and temperature-programmed reduction (TPR) are used to characterize a series of TiO2/gamma -Al2O3, NiO/gamma -Al2O3, and NiO/TiO2/...
A near band edge peaking at 3.4 eV at room temperature is observed by photoluminescence spectroscopy. Raman scattering does not detect any cubic phase coexistence.Wang LSLiu XLZan YDWang DLu DCWang ZG中国科学院半导体研究所(2009年前)
The synthesized catalysts were thoroughly characterized by XRD, Raman, FE-SEM, etc. and were screened for condensation reaction. Among the metal-exchanged catalysts, Zn(0.5)TPA/Al(2)O(3)showed highest aniline conversion with the highest yield of TMQ up to three consecutive cycles. The acidic ...
The mechanisms responsible for TL emission and enhancement of TL output were discussed in view of the results obtained from optical absorption, IR, and Raman spectral studies. The results suggested that both e− and h+ trapped centers were generated at the deeper trap levels and gave TL ...