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Microwave-Synthesis of g-C3N4 Nanoribbons Assembled Seaweed-Like Architecture with Enhanced Photocatalytic Property
Applied Catalysis B: Environment and Energy ( IF 22.1 ) Pub Date : 2020-01-13 , DOI: 10.1016/j.apcatb.2020.118624
Yuanyuan Liu , Xinli Guo , Zhongtao Chen , Weijie Zhang , YiXuan Wang , Yanmei Zheng , Xuan Tang , Ming Zhang , Zhengbin Peng , Rui Li , Ying Huang

The photocatalytic property of graphitic carbon nitride (g-C3N4, CN) photocatalysts is hindered by its low active sites and low photo-generated electron-hole carriers transport rate. Herein, we report a novel CN nanoribbon (CNNR) assembled seaweed-like architecture by microwave synthesis using the melamine-cyanuric acid supramolecular (MCS) as the precursor. The preparation process is facile, fast (<30 min.) and green. The as-prepared CNNR is stable with a large specific area and exhibits a decreased bandgap of 2.5 eV as well as 52.2 times higher kinetic constant for Rhodamine B (RhB) degradation than that of bulk CN. The CNNR also shows highly efficient degradation for methylene blue (MB), methyl orange (MO), and tetracycline (TC). The significantly enhanced photocatalytic property of CNNR is mainly attributed to the synergistic effects of superior structure, O doping, and proper N defects. The result has shed a light on realizing the practical application of CN based photocatalysts.



中文翻译:

微波合成gC 3 N 4纳米带组装的具有增强光催化性能的类似海藻结构

石墨氮化碳(gC 3 N 4,CN)光催化剂受到其低活性位和低光生电子空穴载流子传输速率的阻碍。在这里,我们报告了一种新型的CN纳米带(CNNR)组装的海藻样建筑,通过使用三聚氰胺-氰尿酸超分子(MCS)作为前体的微波合成来实现。制备过程简便,快速(<30分钟)且呈绿色。所制备的CNNR具有较大的比表面积,并且具有稳定的能隙,并且具有2.5 eV的降低的带隙,并且对于若丹明B(RhB)降解的动力学常数比整体CN的动力学常数高52.2倍。CNNR还显示出对亚甲基蓝(MB),甲基橙(MO)和四环素(TC)的高效降解。CNNR的显着增强的光催化性能主要归因于上层结构,O掺杂和适当的N缺陷的协同效应。

更新日期:2020-01-13
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