Welding partially reduced graphene oxides by MOFs into micro-mesoporous hybrids for high-performance oil absorption.

Partially reduced graphene oxides (PRGOs) with a small number of COOH groups remaining at the edges were interlocked by UiO-66-NH nanoparticles into hierarchical porous hybrids (PRGO@UiO-66-NH) during the synthesis of UiO-66-NH in the presence of PRGOs, in which the UiO-66-NH nanoparticles provide micropores and the interlocked PRGO skeletons provide mesopores. The peak intensity of the functional groups on the PRGO@UiO-66-NH hybrids decrease greatly when compared with the GO@UiO-66-NH hybrids and the UiO-66-NH nanoparticles, and the number of -COOH at the edge of the PRGOs are approximately 6.3% after reduction, which is confirmed by the FT-IR and XPS results.