煤
氧化剂
光催化
纳米技术
材料科学
石墨
碳纤维
产量(工程)
废物管理
环境科学
化学
催化作用
有机化学
冶金
工程类
复合材料
复合数
作者
Shengliang Hu,Zhijia Wei,Qing Chang,Adrian Trinchi,Jinlong Yang
标识
DOI:10.1016/j.apsusc.2016.04.038
摘要
One of the most widely used methods for exfoliating crystalline nanocarbon is via strong oxidizing acid treatment of bulk carbon sources, such as graphite, carbon black and coal. Not only is such method dangerous and accompanied by the liberation of toxic gases, it is also plagued by issues of purity, requiring the thorough and costly removal of the excess oxidizing acids and salts formed during the process. Herein we report a facile, green and inexpensive top-down strategy towards fluorescent carbon dots (CDs) from coal without incurring the burden of tedious or inefficient post-processing steps and facing the danger of highly toxic gas liberation. The presented approach shows a high yield and great potential for carbon dot production scale-up using coal, one of our most abundant and low-cost resources. The prepared CDs demonstrate photocatalytic behavior capable of rapidly degrading organic dyes under visible light. Our findings may lead to alternative uses of coal, particularly for applications including the treatment of environmental pollution, solar energy conversion or storage, and highlight coal’s applicability in areas other than energy producing via burning of this great resource.
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