Improving MCM-41 as a Nitrosamines Trap through a One-Pot Synthesis

摘要

Copper oxide was incorporated into MCM-41 by a one-pot synthesis under acidic conditions to prepare a new mesoporous nitrosamines trap for protection of the environment.The resulting composites were characterized by XRD,N_2 adsorption-desorp-tion,and H_2 temperature-programmed reduction techniques,and their adsorption capabilities were assessed in the gaseous adsorption of N-nitrosopyrrolidine (NPYR).The adsorption isotherms were consistent with the Freundlich equation.The copper salt was deposited onto MCM-41 during the evaporation stage and was fixed on the host in the calcination process that followed.MCM-41 was able to capture NPYR in air below 373 K but not at 453 K.Loading of copper oxide on MCM-41 greatly improved its adsorption capability at elevated temperatures.The influence of the incorporation of copper into MCM-41 samples and the adsorption behavior of these samples are discussed in detail.