Scholarlink

<p>Ag-BiOBr nanoflower composites were prepared by a simple precipitation and in situ reduction method. BiOBr nanosheets self-assembled in situ to form multidimensional nanoflower structures, with Ag nanoparticles further tightly modified on the surface of the nanoflowers. The tight contact of Ag and BiOBr promoted the transfer of photo-generated electrons of BiOBr. The photocatalytic performance of the Ag-BiOBr composites was evaluated by degradation of formaldehyde (HCHO) and RhB under visible light irradiation. The 1.5% Ag-BiOBr composite showed remarkably enhanced photocatalytic performance versus BiOBr in the degradation of HCHO and RhB. Under visible light (<i>λ</i> &gt; 400&#xa0;nm), the removal rate of HCHO (0.16&#xa0;mg/L) was 80% when 1.5% Ag-BiOBr was irradiated for 40&#xa0;min, and the degradation rate of RhB reached 94% after 60&#xa0;min. The improvement in the catalytic performance of Ag-BiOBr is attributed to the following: (1) the surface plasmon resonance (SPR) effect of Ag nanoparticles effectively enhances the visible light absorption and utilization of BiOBr; (2) Ag nanoparticles tightly bind with BiOBr nanosheets and act as good conductors for carrier transport, promoting carrier separation in BiOBr nanosheets; and (3) the three-dimensional nanoflower structure provides each component with good interfacial contact and rapid carrier transport ability, thus exposing more catalytically active sites. The catalytic cycling stability test shows that the Ag-BiOBr photocatalyst has excellent long-term stability.</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

Ag-BiOBr Nanoflower Composite with Enhanced Visible Light-Driven Degradation of Formaldehyde and Rhodamine B

  • 期刊论文

  • 发表日期：

    2025年11月14日

查看全文
  • Miaomiao Han

摘要

Ag-BiOBr nanoflower composites were prepared by a simple precipitation and in situ reduction method. BiOBr nanosheets self-assembled in situ to form multidimensional nanoflower structures, with Ag nanoparticles further tightly modified on the surface of the nanoflowers. The tight contact of Ag and BiOBr promoted the transfer of photo-generated electrons of BiOBr. The photocatalytic performance of the Ag-BiOBr composites was evaluated by degradation of formaldehyde (HCHO) and RhB under visible light irradiation. The 1.5% Ag-BiOBr composite showed remarkably enhanced photocatalytic performance versus BiOBr in the degradation of HCHO and RhB. Under visible light (λ > 400 nm), the removal rate of HCHO (0.16 mg/L) was 80% when 1.5% Ag-BiOBr was irradiated for 40 min, and the degradation rate of RhB reached 94% after 60 min. The improvement in the catalytic performance of Ag-BiOBr is attributed to the following: (1) the surface plasmon resonance (SPR) effect of Ag nanoparticles effectively enhances the visible light absorption and utilization of BiOBr; (2) Ag nanoparticles tightly bind with BiOBr nanosheets and act as good conductors for carrier transport, promoting carrier separation in BiOBr nanosheets; and (3) the three-dimensional nanoflower structure provides each component with good interfacial contact and rapid carrier transport ability, thus exposing more catalytically active sites. The catalytic cycling stability test shows that the Ag-BiOBr photocatalyst has excellent long-term stability.

Graphical Abstract