Citation: Shafaq Sahar, Akif Zeb, Yanan Liu, Naseeb Ullah, Anwu Xu. Enhanced Fenton, photo‐Fenton and peroxidase-like activity and stability over Fe₃O₄/g-C₃N₄ nanocomposites[J]. Chinese Journal of Catalysis, ;2017, 38(12): 2110-2119. doi: 10.1016/S1872-2067(17)62957-7 shu

Enhanced Fenton, photo‐Fenton and peroxidase-like activity and stability over Fe₃O₄/g-C₃N₄ nanocomposites

Shafaq Sahar ^a, ,
Akif Zeb ^a,b ,
Yanan Liu ^a ,
Naseeb Ullah ^a ,
Anwu Xu ^a

a Division of Nanomaterials and Chemistry, Hefei National Laboratory for Physical Sciences at Microscale, University of Science and Technology of China, Hefei 230026, Anhui, China;
b Institute of Environmental Sciences and Engineering(IESE), School of Civil and Environmental Engineering(SCEE), National University of Sciences and Technology(NUST), Sector H-12, Islamabad, Pakistan

Received Date: 10 October 2017
Revised Date: 30 October 2017

Fund Project: This work was supported by the National Natural Science Foundation of China (51572253, 21771171), Scientific Research Grant of Hefei Science Center of CAS (2015SRG-HSC048), cooperation between NSFC and Netherlands Organization for Scientific Research (51561135011), and CAS-TWAS Scholarship Program.

We prepared the Fe₃O₄/g-C₃N₄ nanoparticles (NPs) through a simple electrostatic self-assembly method with a 3:97 weight ratio to investigate their Fenton, photo-Fenton and oxidative functionalities besides photocatalytic functionality. We observed an improvement of the Fenton and photo-Fenton activities of the Fe₃O₄/g-C₃N₄ nanocomposites. This improvement was attributed to efficient charge transfer between Fe₃O₄ and g-C₃N₄ at the heterojunctions, inhibition of electron-hole recombination, a high surface area, and stabilization of Fe₃O₄ against leaching by the hydrophobic g-C₃N₄. The obtained NPs showed a higher degradation potential for rhodamine B (RhB) dye than those of Fe₃O₄ and g-C₃N₄. As compared to photocatalysis, the efficiency of RhB degradation in the Fenton and photo-Fenton reactions was increased by 20% and 90%, respectively. Additionally, the horseradish peroxidase (HRP) activity of the prepared nanomaterials was studied with 3,3,5,5-tetramethylbenzidinedihydrochloride (TMB) as a substrate. Dopamine oxidation was also examined. Results indicate that Fe₃O₄/g-C₃N₄ nanocomposites offers more efficient degradation of RhB dye in a photo-Fenton system compared with regular photocatalytic degradation, which requires a long time. Our study also confirmed that Fe₃O₄/g-C₃N₄ nanocomposites can be used as a potential material for mimicking HRP owing to its high affinity for TMB. These findings suggest good potential for applications in biosensing and as a catalyst in oxidation reactions.
- Fe₃O₄/g-C₃N₄ nanocomposites,
- Fenton reaction,
- Dye degradation,
- Peroxidase activity,
- Horseradish peroxidase mimicking
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Enhanced Fenton, photo‐Fenton and peroxidase-like activity and stability over Fe₃O₄/g-C₃N₄ nanocomposites