Design of nitrogen-doped graphitized 2D hierarchical porous carbons as efficient solid base catalysts for transesterification to biodiesel

Abstract

2D graphitized porous carbons decorated with high contents of nitrogen sites such as pyridinic nitrogen were developed, which were used as efficient and reusable solid base catalysts for transesterification to biodiesel.

Meso‐macroporous Carbons Decorated with Ample Nitrogen Sites as Bifunctional Catalysts in CO2 Catalytic Conversion and Oxygen Reduction Reaction

“…In the Raman spectra, two peaks ascribed to D and G bonds at 1344 and 1583 cm −1 were observed, respectively. The D and G bands are associated with sp 3 and sp 2 carbon materials, respectively [32–37] . From 3D‐NHPC‐1 to 3D‐NHPC‐6, the ratio of G band gradually decrease and the bands associated with 2D and S3 gradually disappear, suggesting the contents of structural defects and lattice disorders in the 3D‐NHPC‐x were increased.…”

Hierarchically Ordered Porous Solid Acid: Preparation and Application as a Biodiesel Catalyst

“…[25] The isotherms of HOP CLPS-SO 3 H-x have a steeply increasing trend at higher relative pressures (P/P 0 = 0.8 ∼ 1), indicating the existence of meso-macroporous structures. [26] The textural parameters of all prepared solid acid catalysts and Amberlyst-15 were listed in Table 1. The specific surface area of HOP CLPS-SO 3 H-x increases with the increase of the porogen, and the pore size decreases with the increase of the porogen, which also proves the existence of mesopores in HOP CLPS-SO 3 H-x in the previous SEM images (Figure 1).…”

Three Si-substituted polyoxovanadates as efficient catalysts for Knoevenagel condensation and selective oxidation of styrene to benzaldehyde

“…25 Increasing numbers of researchers are devoted to investigating the Knoevenagel condensation (formation of the CvC bond) and selective oxidation of styrene to benzaldehyde (the oxidative cleavage of the CvC bond) in recent years. [26][27][28][29] However, some of the catalysts still have some deficiencies, such as poor stability, high cost, prone to agglomeration, being difficult to recycle, and so on. [30][31][32][33] The base property and unique redox activity made the POVs potential promising catalysts for the Knoevenagel condensation and selective oxidation of styrene to benzaldehyde.…”