Abstract
Herein, the convenient visible light-induced photografting of hydroxyl ethyl methacrylate onto graphitic carbon nitride (g-CN) is described, leading to well-dispersible g-CN-based precursor polymers that can be injected. Mixing with citric acid as the cross-linker and heating leads to stable thermoset coatings. The process is versatile and easy to perform, leading to g-CN-based coatings. Moreover, the coating can be further functionalized/modified via grafting of other polymer chains, and the resulting structure is useful as photocatalytic surface or as photoelectrode.
Highlights
Photoactive nanomaterials have been in the focus of nanoscience in recent years.[1,2] Among the various photoactive materials, quantum dots,[3,4] conjugated polymers,[5,6] or metal oxides[7,8] have been studied very frequently
A frequently investigated material is graphitic carbon nitride (g-CN), which is mainly because of its photocatalytic and chemical properties as well as facile synthesis.[13−16] g-CN has been utilized as the catalyst in applications such as CO2 conversion,[17,18] hydrogen evolution,[19,20] synthesis of organic molecules,[21,22] or as promoter for the photoinitiation of polymerizations.[23−25] Recently, porosity and grain size of gCN was correlated with hydrogen evolution efficiency, which shows how the material textures affect the utility of g-CN.[26]
To form cyanuric acid−melamine (CM)-based coatings, CM was grafted with hydroxyl ethyl methacrylate (HEMA) a hydroxyl containing monomer via a free radical polymerization pathway initiated with visible light
Summary
Photoactive nanomaterials have been in the focus of nanoscience in recent years.[1,2] Among the various photoactive materials, quantum dots,[3,4] conjugated polymers,[5,6] or metal oxides[7,8] have been studied very frequently. A frequently investigated material is graphitic carbon nitride (g-CN), which is mainly because of its photocatalytic and chemical properties as well as facile synthesis.[13−16] g-CN has been utilized as the catalyst in applications such as CO2 conversion,[17,18] hydrogen evolution,[19,20] synthesis of organic molecules,[21,22] or as promoter for the photoinitiation of polymerizations.[23−25] Recently, porosity and grain size of gCN was correlated with hydrogen evolution efficiency, which shows how the material textures affect the utility of g-CN.[26] g-CN was doped with metals to gain access to diversified catalysis mechanisms in antibiotic degradation.[27] In electro-oxidation of formic acid or methanol, g-CN was combined with Pd and carbon black to obtain stable and reliable catalysts.[28] One of the major disadvantages of g-CN lies in its low dispersibility in water or organic solvents.
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