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On-Surface Polymerization of In-Plane Highly Ordered Carbon Nitride Nanosheets toward Photocatalytic Mineralization of Mercaptan Gas
Advanced Materials ( IF 27.4 ) Pub Date : 2021-09-03 , DOI: 10.1002/adma.202101466 Fangsong Guo 1, 2 , Bing Hu 1 , Can Yang 1 , Jinshui Zhang 1 , Yidong Hou 1 , Xinchen Wang 1
Advanced Materials ( IF 27.4 ) Pub Date : 2021-09-03 , DOI: 10.1002/adma.202101466 Fangsong Guo 1, 2 , Bing Hu 1 , Can Yang 1 , Jinshui Zhang 1 , Yidong Hou 1 , Xinchen Wang 1
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2D carbon nitride nanosheets have attracted ever-increasing interest in photocatalysis due to their unique structural advantages. However, the nanosheets synthesized by the traditional methods, such as post oxidation and liquid exfoliation, have suffered from in-plane disorder with abundant structural defects, which seriously counteracts their structural benefits for photocatalysis. Herein, it is demonstrated that polymer carbon nitride nanosheets with in-plane highly ordered structure (PCNNs-IHO) can be successfully prepared by on-surface polymerization of melamine on NaCl crystal surface at elevated temperatures. The NaCl crystals with relative high surface energy not only facilitate the adsorption and activation of melamine to undergo condensation reaction, but also function as unique substrates to orientate the assembly of 2D nanosheet structure. In addition, NaCl also acts as a reactant to provide Na+ doping into carbon nitride matrix, affording PCNNs-IHO with robust structural base sites. Benefiting from this structural basicity, PCNNs-IHO exhibits superior photocatalytic performance toward CH3SH mineralization under visible light irradiation.
中文翻译：
面内高度有序氮化碳纳米片的表面聚合对硫醇气体的光催化矿化
由于其独特的结构优势，二维氮化碳纳米片在光催化方面引起了越来越多的兴趣。然而，通过传统方法（如后氧化和液体剥离）合成的纳米片存在面内无序和大量结构缺陷，严重抵消了它们在光催化方面的结构优势。在此，证明了在升高的温度下，通过三聚氰胺在 NaCl 晶体表面的表面聚合，可以成功制备具有面内高度有序结构的聚合物氮化碳纳米片（PCNNs-IHO）。具有较高表面能的NaCl晶体不仅有利于三聚氰胺的吸附和活化进行缩合反应，但也可作为独特的基底来定向 2D 纳米片结构的组装。此外，NaCl 还作为反应物提供 Na+掺杂到氮化碳基质中，为 PCNNs-IHO 提供强大的结构基点。受益于这种结构碱性，PCNNs-IHO在可见光照射下对 CH 3 SH 矿化表现出优异的光催化性能。
更新日期：2021-10-20
中文翻译：
面内高度有序氮化碳纳米片的表面聚合对硫醇气体的光催化矿化
由于其独特的结构优势，二维氮化碳纳米片在光催化方面引起了越来越多的兴趣。然而，通过传统方法（如后氧化和液体剥离）合成的纳米片存在面内无序和大量结构缺陷，严重抵消了它们在光催化方面的结构优势。在此，证明了在升高的温度下，通过三聚氰胺在 NaCl 晶体表面的表面聚合，可以成功制备具有面内高度有序结构的聚合物氮化碳纳米片（PCNNs-IHO）。具有较高表面能的NaCl晶体不仅有利于三聚氰胺的吸附和活化进行缩合反应，但也可作为独特的基底来定向 2D 纳米片结构的组装。此外，NaCl 还作为反应物提供 Na+掺杂到氮化碳基质中，为 PCNNs-IHO 提供强大的结构基点。受益于这种结构碱性，PCNNs-IHO在可见光照射下对 CH 3 SH 矿化表现出优异的光催化性能。
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