An olefin metathesis catalyst consists essentially of a transition metal or oxide thereof supported on a high purity silica support possessing low amounts of acidic or basic sites such that in the reaction of pure butene-1 over said catalyst under metathesis reaction conditions the reaction possesses...
Acidic and basic properties of hydroxylated metal oxide surfaces Discuss. Faraday Soc., 52 (1971), p. 264 View in ScopusGoogle Scholar [50] M.A. Fox, M.T. Dulay Heterogeneous photocatalysis Chem. Rev., 93 (1993), pp. 341-357 CrossrefView in ScopusGoogle Scholar [51] G. Kovács, L...
Interestingly, successive reduction of the produced NO2−and NO3− is linked to re-oxidation of Fe2+/Mn2+ leading to efficient nitrogen removal and replenishing of Fe3+/Mn4+, which provide oxide surfaces (electron acceptors) for continuing cycles of NH4+ oxidation. Thus, this new pathway ...
The macroscopic measure for the metal oxide surface’s acid–base characteristics is the iso-electric point (IEP) of the surface, where a high IEP indicates a basic surface and a low value resembles an acidic surface. This surface charge directly affects the compatibility and the wetting ability...
Higher extracellular solubilization of copper oxide could explain its increased toxicity. Rather, copper's intracellular bioavailability may be critical. Nanoparticles and microparticles are most likely taken up by endocytosis and deposited in lysosomes. They are dissolved here due to the acidic pH, ...
Two-dimensional (2D) transition metal oxide and chalcogenide (TMO&C)-based photocatalysts have recently attracted significant attention for address
et al. High capacitance of surface-modified 2D titanium carbide in acidic electrolyte. Electrochem. Commun. 48, 118–122 (2014). Article CAS Google Scholar Lin, Z. et al. Capacitance of Ti3C2Tx MXene in ionic liquid electrolyte. J. Power Sources 326, 575–579 (2016). Article CAS ...
(b) loading the support by attaching biomolecules to the activated surface, characterized in that subsequently the loaded support is treated with an acidic solution, and provided that the method is not used for the preparation of silica wafers which are aminated by silanation using (3-aminopr...
In addition, in order to increase their stability in different pH values, ligands modification, such as the ligands containing porphyrin rings, can enhance their stability in both acidic and basic conditions [60]. Removal of heavy metal oxoanions by MOF-based materials is mainly owed to the ...
It is, for example, shown by Leleyter et al. (1999) that between 20% and 60% of REE in various suspended river sediments are removed by successive extractions by water, by Mg(NO3)2 (exchangeable fraction), sodium actetate (acid-soluble fraction), NH2OH + HCl (manganese oxide ...