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A hollow porous carbon nanospheres (HPCNs) material which suits for adsorption of Direct Black 38 (DB38) was prepared from coal tar using zinc acetate as a template coupled with KOH activation. The synthesized HPCNs features with nanospheres structure and contains both micropores and a lot of mesopores. The HPCN1−4−2 made with the mass weight ratio of coal tar/zinc acetate/KOH at 1:4:2 shows a large...
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