• 主题
高级搜索  >
历史搜索 清空历史
首页> 外文期刊>Applied Catalysis, B. Environmental: An International Journal Devoted to Catalytic Science and Its Applications >Co-Pd/BiVO4: High-performance photocatalysts for the degradation of phenol under visible light irradiation
【24h】

Co-Pd/BiVO4: High-performance photocatalysts for the degradation of phenol under visible light irradiation

机译：CO-PD / BIVO4：高性能光催化剂，用于在可见光照射下苯酚的降解

获取原文
获取原文并翻译 | 示例
           
页面导航
  • 摘要
  • 著录项
  • 相似文献
  • 相关主题

摘要

Leaf-like monoclinic BiVO4 and yCo(x)Pd/BiVO4 (CoxPd loading (y) = 0.060 - 0.092 wt%; Co/Pd molar ratio (x) = 0.26 - 1.70) photocatalysts were prepared using the hydrothermal and polyvinyl alcohol-protected reduction methods, respectively. The Co-Pd nanoparticles (NPs) with a size of 4-6 nm were well dispersed on the surface of leaf-like BiVO4. The bimetallic Co-Pd-loaded BiVO4 samples performed much better than the monometallic Co- or Pd-loaded counterpart, with the 0.062Co(1.70)Pd/BiVO4 sample showing the best photo-catalytic performance (the time for 90% phenol removal was 3 h under visible light irradiation) and good photocatalytic stability. The pseudo-first-order reaction rate constants (0.4753 - 0.8367 h(-1) obtained over yCo(x)Pd/BiVO4 were much higher than those (0.0619 - 0.3788 h(-1)) obtained over BiVO4, 0.058Co/BiVO4, and 0.083Pd/BiVO4, with the 0.062Co(1.70)Pd/BiVO4 sample possessing the highest rate constant. In-depth investigations of X-ray photoelectron spectroscopy, photoluminescence spectroscopy, and photoelectrochemical measurements reveal that high dispersion of bimetallic Co-Pd NPs increased the surface Pd-0 and superoxide anion radical concentrations and suppressed the recombination of photoinduced electrons and holes (hence enhancing the photocatalytic activity of yCo(x)Pd/BiVO4). The partial deactivation of the 0.062Co(1.70)Pd/BiVO4 sample after 15 h of three recycle tests was mainly due to the decrease in adsorbed oxygen species concentration. In addition, the possible photocatalytic phenol degradation mechanism over the 0.062Co(1.70)Pd/BiVO4 sample was also proposed. We believe that the BiVO4-supported Co-Pd NPs have promising applications for the photocatalytic elimination of organic pollutants in wastewater.
机译：叶片单斜醚Bivo4和YCO（X）Pd / Bivo4（CoxPD负载（Y）= 0.060-0.092wt％;使用水热和聚乙烯醇保护制备Co / Pd摩尔比（x）= 0.26-1.70）光催化剂减少方法。尺寸为4-6nm的Co-Pd纳米颗粒（NPS）在叶状BIVO4的表面上很好地分散在表面上。 Bimetallic Co-PD加载的BIVO4样品比单金属合金或PD加载的对应物更好，0.062CO（1.70）PD / BIVO4样品显示最佳的光催化性能（90％酚去除的时间3小时可见光照射）和良好的光催化稳定性。通过YCO（X）Pd / BiVo4获得的伪一级反应速率常数（0.4753-0.8367 H（-1）高于Bivo4,0.058Co / Bivo4获得的那些（0.0619-0.3788 H（-1））和0.083PD / BIVO4，0.062CO（1.70）PD / BIVO4样品具有最高率恒定的样品。深入研究X射线光电子能谱，光致发光光谱和光电化学测量，揭示了双金属CO-PD的高分散性NPS增加表面PD-0和超氧化物阴离子浓度，并抑制了光致电子和孔的重组（因此增强了YCO（X）Pd / BiVo4的光催化活性。0.062CO（1.70）Pd / Bivo4的部分失活在三次再循环试验中的15小时后，主要是由于吸附氧物质浓度的降低。此外，还提出了0.062Co（1.70）Pd / Bivo4样品上的可能的光催化酚脱脂机制。我们相信Bivo4-支持的CO-PD NPS对废水中有机污染物的光催化消除有前途的应用。

著录项

  • 来源
  • 作者

    Zhang Kunfeng; Liu Yuxi; Deng Jiguang; Xie Shaohua; Zhao Xingtian; Yang Jun; Han Zhuo; Dai Hongxing;

  • 作者单位

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

    Beijing Univ Technol Beijing Key Lab Green Catalysis &

    Separat Key Lab Beijing Reg Air Pollut Control Coll Envir Lab Catalysis Chem &

    Nanosci Dept Chem &

    Chem Eng Beijing 100124 Peoples R China;

  • 收录信息
  • 原文格式 PDF
  • 正文语种 eng
  • 中图分类 催化;
  • 关键词

    Co-Pd bimetallic nanoparticle; Leaf-like bismuth vanadate; Supported noble metal photocatalyst; Photocatalytic phenol degradation; Photocatalytic degradation mechanism;

    机译：CO-PD双金属纳米粒子;叶片钒酸盐;支持贵金属光催化剂;光催化酚脱脂;光催化降解机制;

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱：kefu@zhangqiaokeyan.com

京公网安备：11010802029741号 ICP备案号：京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有

  • 客服微信

  • 服务号