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. 2015 Mar 20;5:9270. doi: 10.1038/srep09270

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(a) FESEM image of FeZ-DR; (b, c) TEM images of a single hierarchical FeZ-DR particle at low and high magnifications (the inset in c is the lattice fringes of FeZ-DR); and (d) nitrogen adsorption-desorption isotherms and BJH pore size distributions (inset) of FeZ-DR and FeZ-CA.