Nanoporous g-C3N4/MOF: high-performance photoinitiator for UV-curable coating
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Nanoporous graphene carbon nitride/metal organic framework (g-C3N4/MOF) composites were prepared by solvothermal synthesis. The optical band gap of g-C3N4/MOFs is determined to be 2.69 eV by UV–Vis diffuse reflectance spectroscopy, which is significantly lower than the corresponding value of 3.86 eV for the MOF-5 material. The average diameter of the nanoporous g-C3N4/MOF-5 composites ranged from 10 to 15 μm. The nanoporous g-C3N4/MOF-5 composites were stratiform in shape, and the pores ranged from 10 to 100 nm in diameter. Photocatalytic activity of the nanoporous g-C3N4/MOF-5 composites was evaluated by measuring the curing time of a UV-light-cured coating which had g-C3N4/MOF-5 added to it. The nanoporous g-C3N4/MOF-5 composites exhibited high photocatalytic curing activity for the UV photocurable coating, shortening the curing time to 13 min from 20 min.
The research was financially supported by National Nature Science Foundation of China (61705101), Jiangsu Province Science and Technology Support Program (Grant No. BE2014039), Postgraduate Research and Practice Innovation Program of Jiangsu Province (SJCX19_0590), Opening Project of Jiangsu Key Laboratory of Advanced Structural Materials and Application Technology (ASMA201809), and the Innovative Foundation Project for students of Nanjing Institute of Technology (TB201916011).
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