Cu-boosted one-pot nanoarchitectonics for synthesis of polydopamine membranes as reusable laccase mimic

As a good alternative for natural enzyme, enzyme mimics with artificial functional materials have attracted considerable attention. However, it remains a great challenge to develop a facile method to design laccase mimic with high catalytic activity, long-term stability and reusability. In this report, we propose the one-pot synthesis of reusable paper filter templated Cu-doped polydopamine membranes (PF@PDA/Cu) with laccase-like activity. Compared with the natural laccase, the PF@PDA/Cu membrane exhibits enhanced catalytic activity for the chemical conversion of hydroquinone into benzoquinone . Interestingly, these membranes present good tolerance to high temperature and the catalytic activity increases with the increase of temperature. Moreover, these membranes could be stored for 7 days and recycled for 5 times with negligible loss of catalytic activity. This work provides a promising paradigm for rational design and practical applications of metal-loading PDA materials based on one-pot synthesis methodology.