Synthesis,characterization and catalytic oxidation performance of VTS-2 molecular sieves

VTS-2 molecular sieves with MEL morphology and binary transition metal(Ti-V) oxide framework were synthesized by hydrothermal crystallization using tetrabutylorthotitanate(TBOT) as Ti source,tetraethyl orthosilicate(TEOS) as Si source,tetrabutyl ammonium hydroxide(TBAOH) as template,isopropanol as solvent.The crystallinity,spectroscopic properties and catalytic oxidation performance were evaluated by means of XRD,FT-IR,UV-Vis,EDS and catalytic tests respectively.The results of catalytic reaction styrene oxidation showed that VTS-2 molecular sieves with binary transition metal(Ti-V) oxide framework had the higher catalytic activity than TS-2 and VS-2 molecular sieves with single transition metal oxide framework under the condition of closely framework-metal content.,which indicated that the introduction of vanadium into framework of TS-2 molecular sieves helped to improve the catalytic activity of TS-2 and adjust the oxidative products distribution.