A photothermal cellulose-based material for rapid anti-bacteria and HCHO removal via sequential formation of MnO2 coatings and amine-quinone networks

Nowadays, with the rapid growth of population and acceleration of global urbanization, the microbial contamination on textiles and continuous formaldehyde (HCHO) releases from indoor decoration have aroused public attentions along with the textile consumption. Herein, a green, novel method for preparation of a multifunctional cotton fabric was reported, via the combination use of mussel-inspired fabrication of amine -quinone networks (AQN) and in-situ deposition of manganese dioxide (MnO2). Unlike the conventional methods under extreme conditions, in this method, the MnO2 particles were efficiently deposited on the fiber surfaces at room temperature within 30 min in the presence of reductive AQN surface composed of poly-ethyleneimine (PEI) and dopamine, and the MnO2-deposited cotton fabric exhibits efficient photothermal anti-bacterial capability against both Staphylococcus aureus and Escherichia coli, with inactivation efficiencies over 97% after 20 min of irradiation. In addition, this multi-functional fabric shows prominent UV-shielding property (UPF > 100) and HCHO purification ability, making 106.04 mu g of HCHO rapidly removed within 30 min by 2.5 g of modified cotton. Therefore, we believe that the functional fabric exhibits wide applications in the fields of home textiles for antibacterial and air purification under mild conditions, and the special AQN structure can be further expanded to fabrications of other multifunctional nano-composites.