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Improved Photocatalytic Decolorization of Methyl Orang over Pd-Doped Bi_2O_3

机译:Pd掺杂Bi_2O_3对甲基橙的光催化脱色性能

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摘要

In this article, Pd-doped Bi_2O_3 photocatalysts with different molar ratios of Pd/Bi (1/100, 2/100, 3/100, 4/100, and 5/100) have been prepared by a facile sol-gel method. The photocatalysts prepared were characterized by Brunauer-Emmett-Teller method (BET), X-ray diffraction (XRD), UV/Vis diffuse reflectance, scanning electron microscopy (SEM), X-ray photoelectron spectroscopic (XPS) techniques, and surface photovoltage (SPV), respectively. The results indicate that Pd-doped enhances the photo-induced charge separation efficiency and leads to different electronic properties when Pd-doped Bi_2O_3 photocatalysts are illuminated by different wavelengths of light: one is an electron acceptor in the UV light region, while the other is an electron donor in the visible light region. The photocatalytic activity of Pd-doped Bi_2O_3 photocatalysts for decolorization of methyl orange aqueous solution was evaluated, the result shows that 4% Pd possesses the best photocatalytic activity under UV light irradiation and 3% Pd possesses the best photocatalytic activity under simulated sun light irradiation, and the possible reason is suggested. Doping with Pd is an effective way to promote the photocatalytic performance of Bi_2O_3.
机译:在本文中,通过简便的溶胶-凝胶法制备了具有不同摩尔比的Pd / Bi(1 / 100、2 / 100、3 / 100、4 / 100和5/100)的Pd掺杂Bi_2O_3光催化剂。通过Brunauer-Emmett-Teller方法(BET),X射线衍射(XRD),UV / Vis漫反射率,扫描电子显微镜(SEM),X射线光电子能谱(XPS)技术和表面光电压对制备的光催化剂进行了表征(SPV)。结果表明,掺Pd的Bi_2O_3光催化剂被不同波长的光照射时,掺Pd可以提高光诱导的电荷分离效率,并导致不同的电子性能:一个是紫外光区域的电子受体,另一个是可见光区域中的电子给体。评价了掺Pd的Bi_2O_3光催化剂对甲基橙水溶液的脱色性能,结果表明:4%的Pd在紫外光照射下具有最佳的光催化活性,而3%的Pd在模拟太阳光照射下具有最佳的光催化活性,并提出可能的原因。掺杂Pd是提高Bi_2O_3的光催化性能的有效途径。

著录项

  • 来源
    《Environmental progress》 |2014年第4期|1229-1234|共6页
  • 作者单位

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Chemical Synthesis and Pollution Control Key Laboratory of Sichuan Province, College of Chemistry and Chemical Engineering,China West Normal University, Nanchong, 637009, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

    Key Laboratory of Green Catalysis of Higher Education Institutes of Sichuan, College of Chemistry and Pharmaceutical Engineering, Sichuan University of Science and Engineering, Zigong, 643000, People's Republic of China;

  • 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);
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类
  • 关键词

    photocatalysis; wastewater treatment; Bi_2O_3; doping; Pd;

    机译:光催化;废水处理;Bi_2O_3;掺杂钯;
  • 入库时间 2022-08-17 13:28:12

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