The alumina supported vanadium oxide catalysts (VO x /γ-Al 2 O 3 ) were prepared by wet impregnation-solid phase reaction method with aluminum hydroxide as support precursor. The prepared catalysts were characterized by N 2 adsorptiondesorption, UV-vis, X-ray photoelectron spectroscopy and Raman spectroscopy. The performances of the catalysts were tested for propane dehydrogenation (PDH) reaction. The results indicate that the loading of vanadium on the aluminum hydroxide can influence the surface morphology of the catalysts and greatly improve the specific surface area of the resulted VO x /γ-Al 2 O 3 compared to pure γ-Al 2 O 3 support. The vanadium content markedly influences the polymerization degree of surface VO x species and catalytic performances of VO x /γ-Al 2 O 3 catalysts for PDH. Among all samples, the 2.9VO X /γ-Al 2 O 3 catalyst (vanadium content is 2.9 wt.%) possesses the maximum specific surface area and harmonious polymerization degree of VO X species. It exhibits the best catalytic performances during the 8 h of PDH reaction. Meanwhile, the 2.9VO x /γ-Al 2 O 3 catalyst possesses high regeneration stability and the highest TOF (turnover frequencies) value of 9.0 × 10 À 3 s À 1 , which is evidently higher those of previous works. After 7 reactionregeneration cycles, the initial activity and propene selectivity can be almost restored.
A series of new benzimidazole derivatives were designed and synthesized. Their chemical structures were testified by 1 H NMR, infrared spectroscopy (IR), mass spectrography (MS), and elemental analysis. Their potent antiviral properties indicated the prospect of new drugs. Compound 13, 16, 18, 19, 21, 22, and 23 were identified as novel antivirus with much better selective activity and inhibitory activity than the comparable ribavirin against Coxsackie virus B 3 in VERO cells.
scite is a Brooklyn-based organization that helps researchers better discover and understand research articles through Smart Citations–citations that display the context of the citation and describe whether the article provides supporting or contrasting evidence. scite is used by students and researchers from around the world and is funded in part by the National Science Foundation and the National Institute on Drug Abuse of the National Institutes of Health.