Graphitic carbon nitride quantum dots and nitrogen-doped carbon quantum dots co-decorated with BiVO4 microspheres: A ternary heterostructure photocatalyst for water purification

By X. Lin, Chang Liu, Jingbo Wang, Shuang Yang, Junyou Shi, Yuanzhi Hong. Separation and Purification Technology, 2019

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Abstract In this study, a ternary heterostructure photocatalyst was synthesized by co-anchoring the graphitic carbon nitride quantum dots (CNQDs) and nitrogen-doped carbon quantum dots (NCDs) on the surface of BiVO4 microspheres. The as-synthesized BiVO4/CNQDs/NCDs ternary heterostructure exhibits the excellent photocatalytic activity for degradation of rhodamine B (RhB, dye) and tetracycline (TC, antibiotic) under visible-light illumination. Eventually, it is found that the BiVO4/CNQDs/NCDs shows the much better photoreactivity both for RhB and TC degradation in comparison with that of pure BiVO4, BiVO4/CNQDs, and BiVO4/NCDs samples, respectively. The improvement of photocatalytic performance is due to the efficient separation and transport of photogenerated charge carriers, resulting in formation of a ternary heterostructure system. This work will be useful for the construction of other ternary heterostructure photocatalysts application in waste water purification.

Subfields: Materials Chemistry, Renewable Energy, Sustainability and the Environment

View Paper: https://www.semanticscholar.org/paper/ee3be740775c58dd4d81b59a64b8f65e31711044