Journal
NANO TODAY
Volume 43, Issue -, Pages -Publisher
ELSEVIER SCI LTD
DOI: 10.1016/j.nantod.2022.101429
Keywords
Nanozyme; Graphdiyne; Piezocatalysis; Water purification; Bacterial disinfection
Categories
Funding
- National Natural Science Foundation of China [21501106, 31800800]
- Natural Science Foundation of Shandong Province [ZR2019BC101, ZR2020MB026, ZR202103010467]
- Qingdao Municipal Science and Technology Commission [16-5-1-86-jch]
- analysis and test center of Qingdao University of Science and Technology
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This study synthesized sulfur-doped graphdiyne nanosheets and demonstrated their impressive peroxidase-like activities and piezoelectric properties. Kinetic investigations and DFT calculations revealed the mechanism of piezoelectric effect on promoting peroxidase-like activity. The results showed the great potential of sulfur-doped graphdiyne in applications, especially in wastewater treatment.
Carbon based nanozyme is gaining increasingly attentions due to its high stability and tailorable architecture. However, the practical applications are largely restricted by its moderate catalytic activity. External field stimulation and heteroatom doping are two effective strategies for improving enzyme mimic activities. Here, sulfur doped graphdiyne (SGDY) nanosheets were synthesized using a straightforward one-pot hydrothermal approach and reveals impressive peroxidase-like activities as well as piezoelectric properties. Kinetic investigations show that ultrasound irradiation boosts the peroxidase-like activities of SGDY. DFT calculations explicate the mechanism of piezoelectric effect on promoting peroxidase-like activity. The degradation of dyes and antibiotics, as well as antibacterial studies, demonstrate that SGDY has the great potential to be utilized in wastewater treatment. In addition, a laboratory scale device for continuous wastewater treatment was developed as a proof of concept for the practical applications of piezoelectric enhanced nanozymes. This work not only sheds light on the mechanism of nanozyme-/piezocatalysis coupling process, but also opens up a new avenue for the rational design of nanozymes with high activity for wastewater treatment and bacterial disinfection.(c) 2022 Elsevier Ltd. All rights reserved.
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