Mesoporous silica gel as an effective and eco-friendly catalyst for highly selective preparation of cyclohexanone oxime by vapor phase oxidation of cyclohexylamine with air

Solvent-free liquid-phase selective catalytic oxidation of toluene to benzyl alcohol and benzaldehyde over CeO2–MnOx composite oxides

“…To date, few research studies on Ce-Mn composite oxides have been reported in solvent-free liquid-phase selective catalytic aerobic oxidation of toluene. Based on this concept and our previous studies of the oxidation reaction, [32][33][34][35][36] a simple and environmentally friendly approach for selective preparation of BAL and BOL from the liquid-phase aerobic oxidation of toluene in a solvent-free system has been successfully developed employing CeO 2 -MnO x composite oxides as an efficient and cheap catalyst. The obtained results from the catalytic aerobic oxidation process of toluene will be reported in detail in the present work.…”

Highly Dispersed Low-Polymeric VOx/Silica Gel Catalyst for Efficient Catalytic Dehydrogenation of Propane to Propylene

“…It was obviously observed a broad characteristic diffraction peak at 2θ = 22°, which was the typical amorphous feature. 48 In addition, the characteristic peaks of V 2 O 5 are not detected in fresh, spent and regenerated 3% VO x /SG samples (see Figures 5b, 5c, and 5d), which indicated that the VO x species without the form of V 2 O 5 presented in the catalyst. 36 These results demonstrated that the isolated and low-polymerized VO x species were highly dispersed in 3% VO x /SG catalyst.…”

“…Figure shows the N 2 adsorption–desorption isotherms and the pore diameter distribution cures of samples, and their textural properties are shown in Table . All samples displayed a typical type IV isotherms with a H1-type hysteresis loop at P / P 0 = 0.6–0.8 (Figure A), which is an indicative typical characteristic of mesoporous materials . After loading the VO x species, the textural properties of SG was hardly changed (Figure B and Table ).…”

“…In Figure , the XRD patterns of SG and 3% VO x /SG samples were exhibited. It was obviously observed a broad characteristic diffraction peak at 2θ = 22°, which was the typical amorphous feature . In addition, the characteristic peaks of V 2 O 5 are not detected in fresh, spent and regenerated 3% VO x /SG samples (see Figures b, c, and d), which indicated that the VO x species without the form of V 2 O 5 presented in the catalyst .…”

“…All samples displayed a typical type IV isotherms with a H1-type hysteresis loop at P/P 0 = 0.6−0.8 (Figure 7A), which is an indicative typical characteristic of mesoporous materials. 48 After loading the VO x species, the textural properties of SG was hardly changed (Figure 7B and Table 2). Besides, the textural properties of 3% VO x /SG catalyst showed the declining tendency with TOS, while the properties were basically unchanged with regard to the pore size.…”