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首页> 外文期刊>Journal of materials science >Synthesis and characterization of Ag/Ag_3PO_4 nanomaterial modified BiPO_4 photocatalyst by sonochemical method and its photocatalytic application
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Synthesis and characterization of Ag/Ag_3PO_4 nanomaterial modified BiPO_4 photocatalyst by sonochemical method and its photocatalytic application

机译：声化学法合成Ag / Ag_3PO_4纳米材料修饰的BiPO_4光催化剂及其表征及其光催化应用

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摘要

Ag/Ag_3PO_4 nanomaterial modified BiPO_4 photocatalysts (Ag/Ag_3PO_4/BiPO_4) were synthesized by sonochemical method. The BiPO_4 and Ag/Ag_3PO_4/BiPO_4 photocatalysts were characterized by XRD, UV-Vis DRS, Raman, and TEM analysis. The photocatalytic activity of the prepared heterostructures was studied through the photodegradation of methylene blue (MB) under visible-light irradiation (λ > 420 nm, 70 W/cm~2). The photodegradation of MB was found to be follow pseudo-first-order kinetics. The antimicrobial activity of the prepared heterostructures has also been evaluated in the disinfection of pathogens (Escherichia coli and Staphylococcus aureus). The prepared Ag/Ag_3PO_4/BiPO_4 photocatalysts displayed considerably higher photocatalytic activity (>99% degradation within 25 min and >99% disinfection within 20 min) than did pure BiPO_4. This enhanced photocatalytic activity of the Ag/Ag_3PO_4/BiPO_4 photocatalysts can be attributed to the high separation efficiency and low recombination rate of photogenerated electron-hole pairs, as well as the Ag~+ ions release under visible light irradiation. The possible mechanism underlying the enhanced photocatalytic activities of the Ag/Ag_3PO_4/BiPO_4 photocatalysts is also provided.
机译：通过声化学法合成了Ag / Ag_3PO_4纳米材料修饰的BiPO_4光催化剂（Ag / Ag_3PO_4 / BiPO_4）。通过XRD，UV-Vis DRS，拉曼光谱和TEM分析对BiPO_4和Ag / Ag_3PO_4 / BiPO_4光催化剂进行了表征。通过在可见光（λ> 420nm，70W / cm〜2）下亚甲基蓝（MB）的光降解研究了制备的异质结构的光催化活性。发现MB的光降解遵循伪一级动力学。还已经在病原体（大肠杆菌和金黄色葡萄球菌）的消毒中评估了制备的异质结构的抗菌活性。制备的Ag / Ag_3PO_4 / BiPO_4光催化剂显示出比纯BiPO_4高得多的光催化活性（在25分钟内降解> 99％，在20分钟内消毒> 99％）。 Ag / Ag_3PO_4 / BiPO_4光催化剂的这种增强的光催化活性可以归因于光生电子-空穴对的高分离效率和低重组率，以及在可见光照射下释放的Ag〜+离子。还提供了潜在的机制，潜在的Ag / Ag_3PO_4 / BiPO_4光催化剂的光催化活性增强。

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  • 来源
    《Journal of materials science》 |2017年第16期|11886-11899|共14页
  • 作者

    Chen Yenjui; Tseng Chishun; Tseng Pojen; Huang Changwei; Wu Tsunghsueh; Lin Yang-Wei;

  • 作者单位

    Department of Chemistry, National Changhua University of Education, Changhua, Taiwan;

    Department of Chemistry, National Changhua University of Education, Changhua, Taiwan;

    Department of Chemistry, National Changhua University of Education, Changhua, Taiwan;

    Department of Chemistry, National Changhua University of Education, Changhua, Taiwan;

    Department of Chemistry, University of Wisconsin-Platteville, Platteville, United States;

    Department of Chemistry, National Changhua University of Education, Changhua, Taiwan;

  • 收录信息 美国《科学引文索引》(SCI);美国《工程索引》(EI);美国《生物学医学文摘》(MEDLINE);
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