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. 2016 Jul 19;6:29902. doi: 10.1038/srep29902

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Nitrogen adsorption–desorption isotherm (a), and BJH corresponding pore size distribution curve (b) of B_0.21–N–TiO₂/EP (molar ratio of Ti:B = 1:0.21, 400 ml·min⁻¹ ammonia flow), N–TiO₂/EP, TiO₂/EP.