Abstract
In this study, a highly sensitive colorimetric sensor was established for the detection of Cr (VI) in water using Au NPs@NC@MnO2 based on signal amplification. Au NPs@NC@MnO2 exhibited excellent nano-enzyme activity and catalyzed the oxidation of TMB during detection of Cr (VI) in the linear range of 0.80 to 160.26 nM at limit of detection of 0.73 nM (S/N = 3). The valence states of Au and Mn change before and after the reaction, as a result Au NPs@NC@MnO2 promotes the electron transfer between Cr (VI) and TMB. The colorimetric sensor of Cr (VI) based on Au NPs@NC@MnO2 also exhibits excellent selectivity for interference ions. Moreover, the developed assay has been successfully applied to detect Cr (VI) in real samples. This study demonstrated that Au NPs@NC@MnO2 is simply designed, high sensitivity and selectivity in colorimetric detection of Cr (VI), which could be useful for the field detection of Cr (VI).
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Disclaimer: All third-party content on this website/platform is and will remain the property of their respective owners and is provided on "as is" basis without any warranties, express or implied. Use of third-party content does not indicate any affiliation, sponsorship with or endorsement by them. Any references to third-party content is to identify the corresponding services and shall be considered fair use under The CopyrightLaw.