English
论文成果

当前位置: 中文主页 >> 科学研究 >> 论文成果

Enhanced solar photocatalytic degradation of nitric oxide using graphene quantum dots/bismuth tungstate composite catalysts

发布时间：2023-01-30点击次数：

  • 影响因子：16.744
  • DOI码：10.1016/j.cej.2021.129595
  • 发表刊物：Chemical Engineering Journal
  • 关键字：Air pollution；Nitric oxide；Solar photocatalysis；Graphene quantum dots；Bismuth tungstate；Z-scheme
  • 摘要：Composite (GQDs/BWO) materials for enhanced photocatalysis are hydrothermally produced by combining graphene quantum dots (GQDs) with bismuth tungstate (Bi2WO6). These GQDs/BWO nanomaterials are evaluated for photocatalysis, at different GQDs loadings, for the degradation of gaseous nitric oxide with concentrations of 10–11 ppm. Results show that 10GQDs/BWO has the best photocatalytic performance among competitors for NO degradation. The NO conversion rate reaches 73% during 30 min, which is 3.84 times higher than that of pure Bi2WO6. This is because GQDs not only have a good electron transfer ability, but also form a direct Z-scheme heterojunction with Bi2WO6. These features promote electron-hole separation efficiency of the composite catalyst, and inhibit their recombination. This performance results from the increase in the surface area of the composite and to the increase in light absorption. The selectivity for the formation of NOx- (SNOx-) increased from 66 to 88%, and the DeNOx index increased from −0.003 to 0.43 after the introduction of GQDs. Active species scavenger experiment, Mott-Schottky (MS) tests and density functional theory (DFT) calculations are used to evaluate the mechanism of photocatalytic NO. Furthermore, cyclic tests show that 10GQDs/BWO catalysts maintain their chemical stability for NO degradation over 8000s.
  • 论文类型：期刊论文
  • 论文编号：129595
  • 卷号：420
  • 是否译文：否
  • 发表时间：2021-09-15
  • 收录刊物：SCI、EI
  • 发布期刊链接：https://www.sciencedirect.com/science/article/pii/S1385894721011827

上一条：Effect of high-speed shear flocculation on the flotation kinetics of ultrafine microcrystalline graphite

下一条：Enhanced solar photocatalytic degradation of nitric oxide using graphene quantum dots/bismuth tungstate composite catalysts

返回顶部
+

俞和胜

职务：Professor
主要任职：

个人信息

  • 教授
    博士生导师
    硕士生导师
  • 教师拼音名称：yuhesheng
  • 电子邮箱：
  • 所在单位：化工学院
  • 职务：Professor
  • 办公地点：中国矿业大学文昌校区综合楼203
  • 性别：男
  • 学位：博士
  • 职称：教授
  • 毕业院校：加拿大滑铁卢大学

学术荣誉：

  • 2020当选：江苏特聘教授

曾获荣誉：

  • 2020-08-01江苏特聘教授
  • 2014-10-15加拿大国家自然科学基金工业博士后奖学金
  • 2020-08-01中国矿业大学“高端人才计划”攀登学者
  • 2019-06-01江苏省“六大人才高峰”高层次人才
  • 2018-06-28江苏省“双创博士”
  • 2016-08-01AIChE Journal Editor’s Choice Paper

其他联系方式

  • 邮编:
  • 通讯/办公地址:
  • 邮箱:
扫码关注我

 

访问量：

    • 版权所有：中国矿业大学