期刊
ADVANCED MATERIALS
卷 33, 期 42, 页码 -出版社
WILEY-V C H VERLAG GMBH
DOI: 10.1002/adma.202101466
关键词
carbon nitride nanosheets; highly ordered structures; mercaptans; on-surface polymerization; photocatalytic oxidation
类别
资金
- National Key R&D Program of China [2018YFA0209301]
- National Natural Science Foundation of China [21902031, U1905214, 21961142019, 21861130353, 21425309, 21761132002]
- National Basic Research Program of China [2013CB632405]
- China Postdoctoral Science Foundation [2019M652243]
- Chang Jiang Scholars Program of China [T2016147]
- [D16008]
2D carbon nitride nanosheets with in-plane highly ordered structure (PCNNs-IHO) are successfully prepared by on-surface polymerization of melamine on NaCl crystal surface at elevated temperatures. The NaCl crystals with relative high surface energy facilitate the adsorption and activation of melamine to undergo condensation reaction, and also function as unique substrates to orientate the assembly of 2D nanosheet structure. NaCl acts as a reactant to provide Na+ doping into carbon nitride matrix, affording PCNNs-IHO with robust structural base sites. PCNNs-IHO exhibits superior photocatalytic performance toward CH3SH mineralization under visible light irradiation.
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.
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