A New Synthesis Approach for Carbon Nitrides: Poly(triazine imide) and Its Photocatalytic Properties,ACS Omega

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A New Synthesis Approach for Carbon Nitrides: Poly(triazine imide) and Its Photocatalytic Properties
ACS Omega ( IF 3.7 ) Pub Date : 2018-04-06 00:00:00 , DOI: 10.1021/acsomega.8b00294
Leonard Heymann ₁ , Björn Schiller ₁ , Heshmat Noei ₂ , Andreas Stierle _{2,

3} , Christian Klinke _{1,

4}

Affiliation

Poly(triazine imide) (PTI) is a material belonging to the group of carbon nitrides and has shown to have competitive properties compared to melon or g-C₃N₄, especially in photocatalysis. As most of the carbon nitrides, PTI is usually synthesized by thermal or hydrothermal approaches. We present and discuss an alternative synthesis for PTI which exhibits a pH-dependent solubility in aqueous solutions. This synthesis is based on the formation of radicals during electrolysis of an aqueous melamine solution, coupling of resulting melamine radicals and the final formation of PTI. We applied different characterization techniques to identify PTI as the product of this reaction and report the first liquid state NMR experiments on a triazine-based carbon nitride. We show that PTI has a relatively high specific surface area and a pH-dependent adsorption of charged molecules. This tunable adsorption has a significant influence on the photocatalytic properties of PTI, which we investigated in dye degradation experiments.

中文翻译：

碳氮化物的合成新方法：聚三嗪酰亚胺及其光催化性能

聚（三嗪酰亚胺）（PTI）是属于碳氮化物组的一种材料，与瓜类或gC ₃ N ₄相比，已显示出具有竞争性。，尤其是在光催化中。作为大多数碳氮化物，PTI通常通过热法或水热法合成。我们提出并讨论了PTI的另一种合成方法，该方法在水溶液中具有pH依赖性的溶解度。该合成基于三聚氰胺水溶液电解过程中自由基的形成，所得三聚氰胺自由基的偶联以及PTI的最终形成。我们应用了不同的表征技术将PTI鉴定为该反应的产物，并报告了基于三嗪基氮化碳的首次液态NMR实验。我们显示PTI具有相对较高的比表面积和带电分子的pH依赖性吸附。这种可调吸附对PTI的光催化性能有重大影响，

更新日期：2018-04-06

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