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Surface morphologies of (a1,a2,a3) MXene sheets, (b1,b2,b3) MXene sheets–chitosan, (c1,c2,c3) MXene sheets–lignosulfonate, and (d1,d2,d3) MXene sheets–enzymatic hydrolysis lignin. Reproduced with permission from [50]. Copyright 2020 Elsevier.
