光催化
皮克林乳液
光降解
吸附
乳状液
化学工程
材料科学
降级(电信)
催化作用
石墨氮化碳
水处理
污水
污水处理
比表面积
纳米技术
化学
环境工程
有机化学
环境科学
电信
计算机科学
工程类
作者
Biyun Su,Xueqiong Ma,Liangtao Ran,Shao-Yi Wu,Bingya Hou
标识
DOI:10.1016/j.jece.2023.111297
摘要
Graphitic carbon nitride (g-C3N4) has been intriguing researchers for the preeminent role in water treatment and organic pollutant degradation applications. However, bulk g-C3N4 has bottlenecks such as small specific surface area and insufficient light absorption, reducing the photocatalytic degradation activity. Herein, g-C3N4 photocatalytic nanosheets with high specific surface area were prepared by a morphology control strategy, meanwhile amphiphilic groups were introduced through surface modification to endow the photocatalysts with Pickering particle function, so that they can be stably adsorbed at the micron-scale oil-water emulsion interface to enhance the mass transfer efficiency of oil-water biphasic media. The results showed that the degradation rate of n-hexane model oily sewage was as high as 97.2% by this simple Pickering emulsion (PE) photocatalytic system. Simultaneously, the photocatalytic degradation study was also carried out on an oily sewage sample from the oil production plant in Changqing oilfield, and the degradation rate of the actual oily sewage was 72.3%, which was much higher than that of the bulk-C3N4 photocatalyst (42.9%). This study integrates the photocatalytic technology and PE catalysis and applies them to the treatment of oily sewage, which is an innovative application of emulsion interface photocatalysis and opens up a new perspective for enhancing the photocatalytic activity of g-C3N4.
科研通智能强力驱动
Strongly Powered by AbleSci AI