期刊
ENVIRONMENTAL RESEARCH
卷 197, 期 -, 页码 -出版社
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.envres.2021.111079
关键词
Dye degradation; Graphitic carbon nitrate; Photocatalytic activity; Layered triple hydroxide; Reduced graphene oxide
资金
- King Saud University
- Princess Nourah bint Abdulrahman University
The 2D/2D/2D heterostructured r-GO/LTH/ZnO/g-C3N4 nanohybrid synthesized through hydrothermal method exhibited enhanced photocatalytic degradation activity under visible light irradiation due to large interfacial charge transition of photogenerated charge carriers and effective hindrance of charge carrier recombination.
In this study, 2D/2D/2D heterostructured r-GO/LTH/ZnO/g-C3N4 nanohybrid were synthesized through hydrothermal method. The strong electrostatic interaction between the negatively charged g-C3N4 and r-GO nanosheets with positively charged layered triple hydroxide (LTH) nanosheets are effectively influences the successful formation of heterojunction. The LTH nanosheets are well spread on the g-C3N4 nanosheets combined with r-GO. In particular, the as prepared heterojunction shows a better photocatalytic degradation activity compared to pristine samples and the significant enhancement in the photocatalytic performance is mainly accredited to the large interfacial charge transition of photogenerated charge carriers under the visible light irradiation. Although the 2D/2D/2D heterojunction effectively hinders the charge carrier recombination resulting high photocatalytic activity with good stability. In addition, the r-GO supported LTH/ZnO/g-C3N4 heterojunction shows high photo-stability after sequential experimental runs with no obvious change in the dye degradation process. Consequently, the role of active species was investigated over the r-GO/LTH/ZnO/g-C3N4 heterojunction with the help of different scavengers.
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