Adjusting the host–guest interaction to promote KNO3 decomposition and strong basicity generation on zeolite NaY

Constructing mesoporous solid superbases by a dualcoating strategy

“…S3, † all samples before activation reveal an obvious band at 1383 cm À1 that can be attributed to the asymmetric stretching vibrations of N-O in nitrate. [38][39][40] Activation only slightly weakens the band at 1383 cm À1 in the sample KS, reecting that a large amount of KNO 3 remains undecomposed in the sample. In the case of the KZS(I)-30 and KZS(G)-30 samples, the intensity of such a band decreased signicantly aer activation under the same activation conditions, while the amount of residual KNO 3 in KZS(G)-30 is larger than that in KZS(I)-30.…”

Design and fabrication of mesoporous heterogeneous basic catalysts

“…With the development of material chemistry and catalysis chemistry, a large number of solid bases have been reported since then. [19][20][21][22][23] However, the small pore openings of zeolites result in slow diffusion of substrates, and prevent bulky molecules from reaching the active sites in micropores. MgO) [7][8][9] to multicomponent metal oxides (e.g.…”

“…In addition to this renowned process, various solid bases were also prepared based on zeolites due to their capacity in recognizing and organizing molecules with excellent precision. [19][20][21][22][23] However, the small pore openings of zeolites result in slow diffusion of substrates, and prevent bulky molecules from reaching the active sites in micropores. Of course, the size constraints of basic zeolites are advantageous in terms of shape selectivity even if the diffusion of substrates is slow.…”

Generating Basic Sites on Zeolite Y by Potassium Species Modification: Effect of Base Precursor

“…The samples were activated at 600°C in a flow of N 2 (30 mL min -1 ) for 2 h before measurement. For titration of aqueous-soluble amount of basic sites, 100 mg of sample was shaken in 10 mL of water for 24 h after activation at 600°C for 2 h [6]. The liquid/solid slurry obtained was separated by centrifuge.…”

“…The porous hosts generally possess large surface areas and pore volumes, which provides suitable accommodation for the dispersion of basic guests. Therefore, double-component bases combine the advantages of guest and host, and basic materials with different properties can be obtained by adjusting guest or host [5,6].…”