The structure, surface area, Lewis acidity, reducibility and active sites of the catalyst were significantly influenced by adding S and N. The results of ultraviolet-visible spectroscopy and electron paramagnetic resonance indicated that the presence of the strong electron interactions between dispersed ...
Demonstration of cross reaction in hybrid graphene oxide/tantalum dioxide guided mode resonance sensor for selective volatile organic compound Khwanchai Tantiwanichapan Romuald Jolivot Sakoolkan Boonruang Scientific Reports (2023) High-sensitivity NH3 gas sensor using pristine graphene doped with CuO na...
For practical applications, the Cu-SSZ-13 materials were prepared and characterized to explore their structure and texture as well as their acidic and redox properties. The Cu-SSZ-13 materials were characterized by X-ray diffraction (XRD), solid-state nuclear magnetic resonance (NMR) spectroscopy,...
(Quadrosorb, Quantachrome, Boynton Beach, FL, USA), a thermogravimetry-differential thermal analysis (TG-DTA, Thermoplus EVO II TG8120, Rigaku, Tokyo, Japan; TGDTA2000SA, Bruker AXS, Billerica, MA, USA), and29Si magic angle spinning-nuclear magnetic resonance (MASNMR, ECA-600, JEOL, Tokyo...
The coordination environments of Al in the Al-SBA-15 materials were determined by27Al MAS NMR spectroscopy. The spectra of the Al-SBA-15 materials show two resonances (Fig.2b). The resonance at 0 ppm, which arises from six-coordinated Al, is more intense than the resonance at 56 ppm...
Fulvene is a non-alternant hydrocarbon, although it also displays a planar structure. Unlike benzene, this planar molecule is unstable both thermodynamically and kinetically, with very low resonance energy [4] and aromatic stabilization energy [5]. Despite fulvene being a non-aromatic molecule, the...
The catalysts were investigated by XRD, specific surface area measurements, Raman and EPR (Electron Paramagnetic Resonance) spectroscopy, temperature-programmed reduction (TPR), and SCR. It was concluded that tungsten plays a promotional effect on the neighboring vanadium oxide species, favoring their ...