论文部分内容阅读
In order to investigate the rules on preparation of titanium silicalite (TS-1) the 1H→13C CP/MAS NMR spectrometers were applied to track the function of template TPAOH in the process of crystal lization of titanium silicalite.The research results revealed that at the initial stage of crystallization the TPA+ ions acting as the template could predominantly absorb the polymers of negatively charged silicatitania sol and the interactions between silica sol and titania sol could gradually lead to the formation of tiny crystal nuclei that could slowly grow up to form molecular sieves.Upon investigating the course of crystallization of titanium silicalite the 1H→13C CP/MAS NMR spectrometers were applied to effectively enhance the resolution of 29Si signals in the titanium silicalite.Study results have shown that during the formation of tiny crystal nuclei upon interaction between titania sol and silica sol the influence of titania sol on the silica sol was insignificant.However,when tiny crystal nuclei broke out into molecular sieves the titania sol could enter the zeolite framework that could apparently impose an enhanced effect on the silica sol.