Journal
SCIENCE OF ADVANCED MATERIALS
Volume 13, Issue 5, Pages 922-926Publisher
AMER SCIENTIFIC PUBLISHERS
DOI: 10.1166/sam.2021.3981
Keywords
Carbon Dots; Photocatalyst; Dye Degradation
Funding
- Korea Basic Institute (National Research facilities and Equipment Center) - Ministry of Education [2020R1A6C103A050]
- Basic Science Research Capacity Enhancement Project through the Korea Basic Science Institute (National Research Facilities and Equipment Center) - Ministry of Education [2019R1A6C1010016]
- Gachon University [GCU-2019-0807]
- National Research Foundation of Korea [2020R1A6C103A050] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
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This study demonstrated that the photocatalytic efficiency of ZnO can be significantly improved by doping carbon dots onto its surface, leading to effective degradation of dyes in wastewater.
The carcinogenic and mutagenic nature of organic dyes makes their removal from dye-containing wastewaters essential prior to the discharge of such wastewaters. We synthesized carbon dots having emission wavelengths in the near-infrared region from spinach extract. Thereafter, CDs were embedded on ZnO nanorods through hydrothermal treatment. The prepared ZnO doped with CDs were characterized by various analytical instruments and used to photocatalytically degrade methylene blue dye under sunlight. The as-prepared ZnO exhibited nanorod morphology, with the CDs doped on its surface. The dye degradation followed pseudo-first-order kinetics; the ZnO doped with CDs synthesized at pH 10 achieved the highest dye degradation, with a kinetic coefficient of 0.02889 min(-1). This study shows that the photocatalytic efficiency of ZnO can be effectively improved by doping with CDs.
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