Journal
COLLOIDS AND SURFACES A-PHYSICOCHEMICAL AND ENGINEERING ASPECTS
Volume 647, Issue -, Pages -Publisher
ELSEVIER
DOI: 10.1016/j.colsurfa.2022.129042
Keywords
Carbon nitride; Carbon quantum dots; In-situ one-step synthesis; Photocatalytic degradation; Meloxicam
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Funding
- Scientific Research Fund Project of Education Department of Liaoning Province, China [LJKZ0910]
- Career Development Support Plan for Young and Middle-aged Teachers in Shenyang Pharmaceutical University, China [ZQN2021026]
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In this study, a new visible-light-driven photocatalyst, CQDs-doped carbon nitride nanosheets composite (CNS/CQDs), was successfully synthesized and applied for the removal of organic pollutants in water. The results showed that the introduction of CQDs could enhance the visible light utilization of carbon nitride, and the CNS/CQDs photocatalyst exhibited excellent stability and recyclability under complex matrix and multiple cycles.
The energy storage and upconversion effect of carbon quantum dots (CQDs) could improve the photocatalytic efficiency of materials. In this study, a visible-light-driven photocatalyst, CQDs-doped carbon nitride nanosheets composite (CNS/CQDs) was in-situ synthesized by the thermal stripping of carbon nitride bulk (CNB). The as prepared CNS/CQDs photocatalyst was systematically characterized and applied to the removal of Meloxicam (Mel) in water. The results showed that the introduction of CQDs could improve the visible light utilization of the carbon nitride. Mel (50 mL, 10 mg L-1) was degraded by 99.60% in 45 min with CNS/CQDs (20 mg). The stability and recycling experiments showed that CNS/CQDs could maintain high photocatalytic activity under complex matrix and multiple cycles. This work will provide a new attempt to synthesize the CQDs doped photocatalytic materials for the effective removal of organic pollutants in water under visible light.
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