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首页> 外文期刊>RSC Advances >Fabrication of Ag3PO4/alpha-Bi2O3 composites with enhanced photocatalytic properties under visible light
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Fabrication of Ag3PO4/alpha-Bi2O3 composites with enhanced photocatalytic properties under visible light

机译：可见光下具有增强的光催化性能的Ag3PO4 /α-Bi2O3复合材料的制备

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摘要

The treatment of organic dyes is often conducted using the photocatalytic technique, however, the necessity for ultraviolet irradiation and efficient degradation still limit its wide practical application. Here, we report on a facile and effective co-precipitation hydrothermal method for fabricating Ag3PO4/alpha-Bi2O3 (AB) hierarchical heterostructures with an improved visible-light response. Rod-like alpha-Bi2O3 was firstly prepared under hydrothermal conditions, and then silver nitrate and disodium hydrogen phosphate were successively added to form AB. The measurement results signify that heterojunctions of polyhedral Ag3PO4 adhered to rod-like alpha-Bi2O3 were apparently found. AB possesses a markedly enhanced photocatalytic performance and outstanding ability in decomposing methylene blue (MB), methyl orange (MO) and rhodamine B (RhB) under visible light, compared to pure alpha-Bi2O3 or Ag3PO4. The amount of silver ions released reveals that the formation of alpha-Bi2O3 could enhance the stability of the AB composites. The fluorescence tests indicate that AB is helpful in producing the (OH)-O-center dot radicals responsible for enhanced photocatalytic activity. The degradation rate could be maintained even after three degradation cycles, suggesting an admirable chemical and physical stability of AB. In addition, a possible mechanism for the enhanced photocatalytic properties of AB was also discussed.
机译：使用光催化技术经常进行有机染料的处理，然而，紫外线辐照和有效降解的必要性仍然限制了其广泛的实际应用。在此，我们报告了具有改进的可见光响应的Ag3PO4 /α-Bi2O3（AB）分层异质结构的构建和有效共析水热量方法。首先在水热条件下制备棒状α-Bi2O3，然后连续加入硝酸银和磷酸二钠以形成AB。测量结果表明，显然发现了粘附到棒状α-Bi2O3的多面体Ag3PO4的异质结。与纯α-Bi2O3或Ag3PO4相比，AB具有在可见光下分解亚甲基蓝（Mb），甲基橙（Mo）和罗丹明B（rhB）的显着增强的光催化性能和突出能力。释放的银离子的量表明，α-Bi2O3的形成可以增强AB复合材料的稳定性。荧光试验表明AB有助于产生负责增强的光催化活性的（OH）-O中心点基团。即使在三次降解循环后，也可以保持降解速率，表明AB的令人钦佩的化学和物理稳定性。此外，还讨论了AB的增强光催化性能的可能机制。

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  • 来源
    《RSC Advances》 |2015年第117期|共10页
  • 作者

    Ding Feng; Zhang Sizhao; Luo Xuegang; Lin Xiaoyan;

  • 作者单位

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

    Natl Univ Def Technol Sci &

    Technol Adv Ceram Fibers &

    Composites Lab Changsha 410073 Hunan Peoples R China;

    Minister Educ Engn Res Ctr Biomass Mat Mianyang 621010 Sichuan Peoples R China;

    Southwest Univ Sci &

    Technol Sch Mat Sci &

    Engn Mianyang 621010 Sichuan Peoples R China;

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  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 化学;
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