A bifunctional nanozyme of carbon dots-mediated Co 9 S 8 formation

Controlling the size of nanocrystals and inhibiting their agglomeration are of paramount importance for achieving ideal catalytic performance. Here we discovered that carbon dots (CDs) are not only able to serve as reductants but also as stabilizers of ultrasmall Co S nanocrystals by means of their...

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Bibliographic Details
Published in:Journal of colloid and interface science 2022-02, Vol.608 (Pt 2), p.1348
Main Authors: Li, Shijia, Pang, Ernan, Li, Ning, Chang, Qing, Yang, Jinlong, Hu, Shengliang
Format: Article
Language:English
Subjects:
Carbon
Colorimetry
Nanocomposites
Peroxidase
Piperidines
Online Access:Get full text
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Summary:Controlling the size of nanocrystals and inhibiting their agglomeration are of paramount importance for achieving ideal catalytic performance. Here we discovered that carbon dots (CDs) are not only able to serve as reductants but also as stabilizers of ultrasmall Co S nanocrystals by means of their surface terminal groups. As a result, ultrasmall Co S nanocrystals are incorporated into porous carbon nanosheets formed by splicing CDs. The resultant nanocomposites display a rich pore structure accompanying with large specific surface area and outstanding bifunctional performances to mimic the catalytic activity of peroxidase and oxidase without exerting any external energy. More importantly, the unique architecture endows Co S nanocrystals with high stability and good durability. The nanocomposites have been demonstrated as a colorimetric sensor for detection of ascorbic acid with a superior anti-interference ability as well as a detection limit of 0.2 μM. Our findings open new synthetic opportunities by tuning the interaction of CDs with the surrounding environment and enable advanced applications such as biomedicine and catalytic transformations.
ISSN:1095-7103