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We propose g-C3N4 nano-sheets and a graphene three-dimensional (3D) gel system composed of two metal free nano-sheets of g-C3N4 and graphene via the stacking effect of two-dimensional (2D) nano-sheets and the π-π conjugated at low temperature. This material has self-regeneration and containing only C and N, which confirms the ability to efficiently remove chromium (VI) (Cr(VI)) via the synergistic...
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