Abstract
In this study, two novel crystal materials pcp1 and pcp1-L have been synthesized successfully. The different conformations of the two crystals are mainly attributed to the introduction of the Schiff-base ligand L (L=(E)-4-methyl-N-((6-methoxypyridin-2-yl)methylene)aniline). Subsequently, pcp1 and pcp1-L composites have been firstly produced by a vacuum filtration method on various substrates (i.e., melamine foam, plastic mesh, carbon fiber cloth and glass cloth). The obtained robust composites show excellent performance in removing PMs owing to high ζ potential, microporous structure, large conjugation system and electron cloud-exposed metal center (DFT calculations) of pcp1 and pcp1-L. Particularly, pcp1-L@glass cloth with low pressure drop exhibits high thermal stability and high long-term reproducibility. Additionally, the high removal efficiency of pcp1-L@glass cloth towards particulate matters could also be maintained, even achieving >99.9 % in the car exhaust gas field test.
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