Although many material designs or strategic methods have been proposed for treating oil spills and oily wastewater,the complex oily state,dealing with the harsh operating conditions of oil-water separation(such as the recovery of viscous spilled crude oil,bacteria-containing oily wastewa-ter,and removal of spilled oil under fire),and the autorecycling of oil and absorption materials re-main a great challenge.This work proposed an ingenious design strategy of"several birds with one stone"to prepare pH/thermoresponsive flame-retardant/photothermal bactericidal P-Fe304-polydopamine(PDA)@melamine-formaldehyde(MF)foams.This design makes the foams remarkably effective in the re-covery of spilled viscous crude oil as well as in the separation of bacteria-containing oily emulsions,par-ticularly for instant fire extinguishing by magnetically controlled oil absorption as well as for fire alarms.The photothermal effect and pH response induce a change in the surface wettability of the foams,facil-itating excellent autoadsorption/desorption of the spilled oil.The photothermal bactericidal activity and fouling resistance of the foam are beneficial to the separation of bacteria-containing oily wastewater.Outstanding flame-retardant properties and maneuverable magnetic control enable the foam to rapidly recover the spilled oil in a large range of fires,extinguish fires instantly,and facilitate early fire warn-ing.The proposed strategy is expected to inspire further research on treating oil spills under complex conditions.

School of Chemistry and Chemical Engineering,Guangzhou University,Guangzhou 510006,China;Department of Chemistry,College of Science,Taif University,P.O.Box 11099 Taif 21944,Saudi Arabia;College of Materials Science and Engineering,Taiyuan University of Science and Technology,Taiyuan 030024,China;Department of Mechanical and Construction Engineering,Faculty of Engineering and Environment,Northumbria University,Newcastle upon Tyne,NE1 8ST,UK;Integrated Composites Laboratory(ICL),Department of Chemical&Biomolecular Engineering,University of Tennessee,Knoxville,TN 37996,USA

[1]Ya Chen;Jing Lin;Gaber A.M.Mersal;Jianliang Zuo;Jialin Li;Qiying Wang;Yuhong Feng;Jianwei Liu;Zili Liu;Bin Wang;Ben Bin Xu;Zhanhu Guo-."Several birds with one stone"strategy of pH/thermoresponsive flame-retardant/photothermal bactericidal oil-absorbing material for recovering complex spilled oil)[J].材料科学技术（英文版）,2022(33):82-97

spilled,wastewa,autorecycling,itating,autoadsorption,extinguish

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