论文
论文标题: Efficient Combination of Carbon Quantum Dots and BiVO4 for Significantly Enhanced Photocatalytic Activities
作者: Hu, Chenyan; Chen, Qingdi; Tian, Maosheng; Wang, Weiwen; Yu, Junxia; Chen, Lianguo
出版刊物: CATALYSTS
出版日期: MAR
出版年份: 2023
卷/期:
DOI: 10.3390/catal13030463
论文摘要: The development of highly efficient and stable photocatalysts is of critical importance for the removal of environmental pollutants, such as paraben preservatives. In this work, carbon quantum dots (CQDs) were used to modify bismuth vanadate (BiVO4) through a hydrothermal reaction. Regarding the as-formed CQDs/BiVO4 composite, TEM, XPS, and Raman spectra analysis demonstrated the strong interaction between CQDs and BiVO4, possibly leading to the elevated energy level of the composite. As compared to pristine BiVO4, CQDs/BiVO4 showed an increase in light harvesting, and significantly enhanced visible-light activities in degrading the typical paraben pollutant-benzyl paraben (BzP)-where the maximum 85.4% of BzP was degraded in 150 min. After four cycle reactions, the optimum sample 0.6%CQDs/BiVO4 still degraded 78.2% of BzP, indicating the good stability and reusability of the composite. The notably higher photocurrent and smaller arc in Nyquist plot were measured by CQDs/BiVO4, unveiling the improved photocharge separation and lowered interfacial charge transfer resistance by CQDs modification. Meanwhile, due to the promoted energy level, CQDs/BiVO4 practically produced center dot O-2(-) species and thereby contributed to the BzP degradation, while they had no ability to produce center dot OH. This was contrary to the BiVO4 system, where center dot OH and h(+) played the dominant roles.
== 实验室与学会 ==
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  • 中国科学院藻类生物学重点实验室
  • 农业部淡水养殖病害防治重点实验室
  • 武汉白暨豚保护基金会
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  • 中国动物学会原生动物学分会
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  • 中国鱼类学会
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  • 水生生物博物馆
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