相关链接
联系方式
  • 通信地址:长春市人民大街5625号
  • 邮编:130022
  • 电话:0431-85262779
  • 传真:0431-85262779
  • Email:xiez@ciac.jl.cn
当前位置:> 首页 > 论文著作 > 正文
5.On-Off-On Fluorescent Carbon Dot Nanosensor for Recognition of
作者:zhigang xie
关键字:Fluorescent
论文来源:期刊
发表时间:2013年
Chromium(VI) [Cr(VI)] is considered as a severe environmental
pollutant, due to its highly toxic and carcinogenic properties. Therefore, low cost,
highly sensitive sensors for the determination of Cr(VI) are highly demanded. It is
well-known that highly luminescent carbon dots (CDs) have been successfully
applied as ?uorescent nanosensors for pH, ions, and molecular substances. In the
present work, we have demonstrated an on?o? ?uorescent CD probe for detecting
Cr(VI) based on the inner ?lter e?ect (IFE) because the absorption bands of
Cr(IV) fully covered the emission and excitation bands of CDs. This CD-based
nanosensor provides obvious advantages of simplicity, convenience, rapid response,
high selectivity, and sensitivity, which have potential application for the detection of
Cr(VI) in the environmental industry. In addition, because Cr(VI) can be reduced
to low valent chromium species easily by reductant, resulting in the elimination of
the IFE and recovery of CD ?uorescence, the CD?Cr(VI) mixture could behave as an o??on type ?uorescent probe for
reductant. We employed ascorbic acid (AA) as an example molecule to demonstrate this o??on type ?uorescent probe.