Twin suppression effect of dihydroxy-benzene isomers during the secondary growth of -oriented zeolite MFI nanosheet films

The presence of MFI twin crystals on b -axis oriented zeolite MFI nanosheet films was suppressed by adding dihydroxy-benzene isomers in the synthesis mixture. The resulting nanosheet films exhibit good intergrowth and a small grain thickness of 30-45 nm within a relatively short synthesis time (hour...

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Published in:CrystEngComm 2023-04, Vol.25 (16), p.2359-2365
Main Authors: Xu, Ruilan, Peng, Yong, Lu, Peng, Miao, Yurun, Duan, Xuekui, Lee, Dennis T, Wang, Rui, Wang, Zhengbao, Tsapatsis, Michael
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Summary:The presence of MFI twin crystals on b -axis oriented zeolite MFI nanosheet films was suppressed by adding dihydroxy-benzene isomers in the synthesis mixture. The resulting nanosheet films exhibit good intergrowth and a small grain thickness of 30-45 nm within a relatively short synthesis time (hours). The possible twin suppression mechanisms for the three isomers are discussed. MFI twin crystals on b -axis oriented zeolite MFI nanosheet films were suppressed in the presence of dihydroxybenzene isomers. The resulting films presented an ultra-thin grain thickness of 30-45 nm within hours.
ISSN:1466-8033
DOI:10.1039/d2ce01407f