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One-pot bottom-up fabrication of a 2D/2D heterojuncted nanozyme towards optimized peroxidase-like activity for sulfide ions sensing
- Source :
- Sensors and Actuators B: Chemical. 306:127565
- Publication Year :
- 2020
- Publisher :
- Elsevier BV, 2020.
-
Abstract
- The cutting-edge nanozyme-based strategy for rapid detection remains significantly limited by the lack of simple synthetic method with ideal catalytic activity. In this regard, 2D nanozymes has recently emerged as a group of promising nanozymes because of their unique enzyme mimicking properties. Herein, via one-pot bottom-up co-calcination, we report a robust strategy to promote the peroxidase-like activity of 2D nanozyme by rational fabricating a 2D/2D heterojuncted nanozyme: MoS2/g-C3N4 heterojuncted nanosheets (MoS2/g-C3N4 HNs). With merits of the acceleration of electron transfer and the synergistic effect of MoS2 and g-C3N4 as well as high affinity to the catalytic substrates, the 2D/2D MoS2/g-C3N4 heterojuncted nanozyme shows enhanced peroxidase-like activity over the pure g-C3N4 nanosheets and MoS2 nanosheets. As a proof-of-concept application, a colorimetric sensor based on this 2D/2D heterojuncted nanozyme was developed to detect sulfide ions (S2−), and the detection limit was found to be as low as 37 nM. Therefore, the current work not only demonstrates a powerful strategy to improve the activity of 2D nanozymes but also establish a facile approach for water-safety monitoring.
- Subjects :
- Materials science
Fabrication
Metals and Alloys
Nanotechnology
02 engineering and technology
010402 general chemistry
021001 nanoscience & nanotechnology
Condensed Matter Physics
01 natural sciences
Rapid detection
0104 chemical sciences
Surfaces, Coatings and Films
Electronic, Optical and Magnetic Materials
Catalysis
Colorimetric sensor
SULFIDE ION
Peroxidase like
Materials Chemistry
Electrical and Electronic Engineering
0210 nano-technology
Instrumentation
Subjects
Details
- ISSN :
- 09254005
- Volume :
- 306
- Database :
- OpenAIRE
- Journal :
- Sensors and Actuators B: Chemical
- Accession number :
- edsair.doi...........9ab18ec6c1f9b54435e0ae83bb0b37af