Hydrophobic Silicalite-1 shell enhances SCR hydrothermal stability of CuSAPO-34 at low temperature
Cu/SAPO-34@ Silicalite core-shell composite molecular sieves with different fluorine contents were synthesized by secondary growth method. The hydrophobicity of core-shell structures was adjusted by changing the fluorine content in the seed guide solution. The structure and low-temperature hydrothermal stability of the samples were analyzed by XRD, TG, SEM and micro-reaction. The results show that compared with the Cu / SAPO-34 core structure, the core-shell structure molecular sieves have larger specific surface area, higher active Cu <sup>2+</sup> ion relative ratio and strong
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