The excellent performance of Bu4NBr/P C3N4-2 Bu4NBr/P C3N4-2o the synergetis effect of attributed and halide anions for ring opening of epoxide as well as to basic sithe for adsynergeticnd activation of CO2.
Meanwhile, three kinds of nitrogen-containing groups (amine, triazole, and terpyridine groups) were introduced or formed during the modification and cross-linking, which offer more basic sites for the acidic gas sorption.
It may be due to decarbonation of hydroxyapatite at different calcination temperatures, providing the different amounts of active basic sites for the transesterification.
Basic sites of various oxide catalysts for oxidative methane coupling have been studied with the IR spectra of CO2 probe molecules.
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For natural clinoptilolite, ΔpHs > 0 showing a prevalence of Lewis basic sites, whereas for acid-modified clinoptilolite forms, ΔpHs < 0, being evidence of a prevalence of Lewis acid sites.
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Lackland is best known for its role as the basic training site for the Air Force, Air Force Reserve and Air National Guard.
CO2-TPD results proved that mostly the medium strength basic sites were responsible for hydrogen abstraction from benzyl alcohol producing benzaldehyde.
However, the rich basic sites were effective for absorbing aliphatic sulfur compounds especially the mercaptans which had a nature of acid and providing enough hydrogen to crack them [11, 30].
