Scholarlink

<p>Carbon dots (CDs) exhibit great potential in modifying TiO<sub>2</sub> to enhance its photocatalytic capacities. However, the influence of different compositing approaches on the TiO<sub>2</sub>/CDs photocatalytic performance has not been carefully studied. In this study, CDs-modified TiO<sub>2</sub> photocatalysts were prepared via hydrothermal treatment, direct calcination, and calcination-hydrothermal sequential treatment, respectively. Careful study revealed that the third catalyst demonstrated the most enhanced photocatalytic performance because in this synthesis approach; CDs not only improved the light absorption capacity of TiO<sub>2</sub> and increased the lifetime of charge carriers, but also enlarged the specific surface area of TiO<sub>2</sub>. With further optimization in CDs mass ratios, the degradation efficiencies of MB and RhB by the optimum catalyst were increased by 18% and 21%, respectively, from that of the pristine TiO<sub>2</sub>, highlighting the great potential of CDs as modification agents to enhance the photocatalytic performance of traditional photocatalysts.</p> Graphical abstract <p></p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Enhanced photocatalytic degradation efficiency for TiO2-carbon dots composite catalyst prepared via calcination-hydrothermal sequential treatment

  • 期刊论文

  • 发表日期：

    2025年4月30日

查看全文
  • Yungang Yuan,
  • Zhuang Xiang,
  • Yongjian Tong,
  • Zhili Peng

摘要

Carbon dots (CDs) exhibit great potential in modifying TiO2 to enhance its photocatalytic capacities. However, the influence of different compositing approaches on the TiO2/CDs photocatalytic performance has not been carefully studied. In this study, CDs-modified TiO2 photocatalysts were prepared via hydrothermal treatment, direct calcination, and calcination-hydrothermal sequential treatment, respectively. Careful study revealed that the third catalyst demonstrated the most enhanced photocatalytic performance because in this synthesis approach; CDs not only improved the light absorption capacity of TiO2 and increased the lifetime of charge carriers, but also enlarged the specific surface area of TiO2. With further optimization in CDs mass ratios, the degradation efficiencies of MB and RhB by the optimum catalyst were increased by 18% and 21%, respectively, from that of the pristine TiO2, highlighting the great potential of CDs as modification agents to enhance the photocatalytic performance of traditional photocatalysts.

Graphical abstract