期刊
APPLIED SURFACE SCIENCE
卷 565, 期 -, 页码 -出版社
ELSEVIER
DOI: 10.1016/j.apsusc.2021.150564
关键词
Carbon dots; Photocatalysis; Tetracycline hydrochloride; BiVO4; reduced graphene hydrogel; CO2 reduction
类别
资金
- National Natural Science Foundation of China [21908080]
- National Research Foundation of Korea (NRF) - Korea government (MIST) [2020R1C1C1011667, 2019R1A2C1002844, 2016R1A6A1A03012877]
- Natural Science Foundation of Jiangsu Province [BK20180884]
- National Research Foundation of Korea [2020R1C1C1011667] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
In this study, a novel hybrid photocatalyst CD-BVO/rGH was fabricated by coupling carbon dot decorated BiVO4 with reduced graphene hydrogel. The CD-BVO/rGH photocatalyst showed significantly enhanced photocatalytic efficiency for TCH degradation and CO2 reduction. The enhanced photocatalytic activity of CD-BVO/rGH is attributed to synergistic effects, including better light energy utilization via the upconversion effects of the CDs and the enhanced migration and separation of photoexcited carriers by the 3D network structure of the rGH.
In this study, we fabricated a novel hybrid photocatalyst (CD-BVO/rGH) by coupling carbon dot (CD)-decorated BiVO4 (BVO) with a reduced graphene hydrogel (rGH). The CD-BVO/rGH photocatalyst significantly enhanced the photocatalytic efficiency for tetracycline hydrochloride (TCH) degradation compared with pure BVO and BVO/rGH under simulated solar irradiation. CD-BVO/rGH also showed a substantial performance in the photocatalytic reduction of CO2. The enhanced photocatalytic activity of CD-BVO/rGH is attributed to synergistic effects, such as better light energy utilization via the upconversion effects of the CDs and the enhanced migration and separation of photoexcited carriers by the three-dimensional (3D) network structure of the rGH. The systematic analysis of the band structure, electron spin resonance, and free radical trapping revealed that h+ and center dot O2- mediate the final photocatalytic degradation of pollutants. Our results provide insight into the design and construction of highly efficient hybrid photocatalysts combined with functional carbon nanostructures to enhance the photocatalytic activity for the photodegradation of environmental pollutants and CO2 reduction.
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