光催化
石墨烯
光降解
氮气
甲基橙
胺气处理
兴奋剂
材料科学
纳米技术
化学
光化学
化学工程
催化作用
有机化学
光电子学
工程类
作者
Yuancong Jiang,Shamik Chowdhury,Rajasekhar Balasubramanian
标识
DOI:10.1016/j.jcis.2018.09.064
摘要
Nitrogen (N)-doped graphene aerogels (GAs) have recently emerged as a promising class of photocatalytic materials for a multitude of environmental applications. Their photocatalytic activity depends strongly on the type of N bonding configurations created in the host lattice, which in turn relies on the choice of nitrogen sources employed as molecular precursors. However, there is still no systematic assessment of the photocatalytic activity of N-doped GAs (NGAs) synthesized using different nitrogen containing precursors. Herein, we developed a series of NGAs using different kinds of amine, such as primary and secondary amines, as nitrogen precursors and rigorously evaluated their photocatalytic activity toward degradation of acridine orange under visible light irradiation. The bonding state of N atoms in the NGAs could indeed be effectively modulated by a judicious selection of an appropriate nitrogen precursor. Primary amines resulted mainly in pyridinic N structures whereas pyrrolic N was predominantly obtained from secondary amines. Irrespective of the source of nitrogen, the photocatalytic efficiency of the NGAs was directly correlated to the concentration of pyrrolic N defects in their constituent graphene building blocks. Further, the photodegradation byproducts did not present any significant antibacterial activity, reflecting the ecofriendly nature of the as-prepared novel photocatalysts.
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