Cobalt-doped graphitic carbon nitride with enhanced peroxidase-like activity for wastewater treatment

Content Provider	Semantic Scholar
Author	Mu, Jianshuai Zhao, Xin Yang, En-Cui Zhao, Xiao-Jun
Copyright Year	2016
Abstract	Cobalt-doped graphitic carbon nitride (Co-g-C3N4) materials with different cobalt contents were prepared by a facile one-pot thermal condensation method with urea and cobalt chloride. The morphology and composition of the synthesized products were characterized by different techniques. X-ray photoelectron spectroscopy and elemental mappings revealed that cobalt element is highly dispersed in the framework of g-C3N4. For the first time, Co-g-C3N4 was demonstrated to own dramatically enhanced peroxidase-like activity, compared with pure g-C3N4. Its activity is dependent on the content of cobalt doping, and the optimal content is 2.5% (Co-g-C3N4-2) based on the result of inductively coupled plasma atomic emission spectroscopy. The catalytic kinetics reveals that Co-g-C3N4-2 has a higher affinity for the substrate 3,3′,5,5′-tetramethylbenzidine (TMB) and similarly efficient performance in comparison to that of natural peroxidase. The proposed mechanism demonstrates that cobalt dopant facilitates the electron transfer of Co-g-C3N4 from TMB to H2O2, thus enhances its peroxidase-like activity. Based on the greatly enhanced peroxidase-like activity, Co-g-C3N4-2 is firstly used for wastewater treatment. With rhodamine B as a model, Co-g-C3N4-2 exhibits 11 times higher degradation rate than that of pure g-C3N4. This research will be helpful to improve the development of efficient artificial peroxidase mimic for removing contaminants from wastewater.
Starting Page	35568
Ending Page	35576
Page Count	9
File Format	PDF HTM / HTML
DOI	10.1039/C6RA02911F
Volume Number	6
Alternate Webpage(s)	http://www.rsc.org/suppdata/c6/ra/c6ra02911f/c6ra02911f1.pdf
Alternate Webpage(s)	https://doi.org/10.1039/C6RA02911F
Language	English
Access Restriction	Open
Content Type	Text
Resource Type	Article