Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub>
MoS<sub>2</sub> quantum dots (QDs) functionalized g-C<sub>3</sub>N<sub>4</sub> nanosheets (MoS<sub>2</sub>@CNNS) were prepared through a protonation-assisted ion exchange method, which were developed as a highly efficient biomimetic catalyst. Structura...
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| Format: | Article |
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MDPI AG
2018-11-01
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| Series: | Nanomaterials |
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| Online Access: | https://www.mdpi.com/2079-4991/8/12/976 |
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| author | Peng Ju Yunhong He Min Wang Xiuxun Han Fenghua Jiang Chengjun Sun Chi Wu |
| author_facet | Peng Ju Yunhong He Min Wang Xiuxun Han Fenghua Jiang Chengjun Sun Chi Wu |
| author_sort | Peng Ju |
| collection | DOAJ |
| description | MoS<sub>2</sub> quantum dots (QDs) functionalized g-C<sub>3</sub>N<sub>4</sub> nanosheets (MoS<sub>2</sub>@CNNS) were prepared through a protonation-assisted ion exchange method, which were developed as a highly efficient biomimetic catalyst. Structural analysis revealed that uniformly-dispersed MoS<sub>2</sub> QDs with controllable size and different loading amount grew in-situ on the surface of CNNS, forming close-contact MoS<sub>2</sub>@CNNS nanostructures and exhibiting distinct surface properties. Compared to MoS<sub>2</sub> QDs and CNNS, the MoS<sub>2</sub>@CNNS nanocomposites exhibited a more than four times stronger peroxidase-like catalytic activity, which could catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) in the presence of H<sub>2</sub>O<sub>2</sub> to generate a blue oxide. Among the MoS<sub>2</sub>@CNNS nanocomposites, MoS<sub>2</sub>@CNNS(30) was verified to present the best intrinsic peroxidase-like performance, which could be attributed to the more negative potential and larger specific surface area. A simple, rapid and ultrasensitive system for colorimetric detection of H<sub>2</sub>O<sub>2</sub> was thus successfully established based on MoS<sub>2</sub>@CNNS, displaying nice selectivity, reusability, and stability. The detection limit of H<sub>2</sub>O<sub>2</sub> could reach as low as 0.02 μM. Furthermore, the kinetic and active species trapping experiments indicated the peroxidase-like catalytic mechanism of MoS<sub>2</sub>@CNNS. This work develops a novel, rapid, and ultrasensitive approach for visual assay of H<sub>2</sub>O<sub>2</sub>, which has a potential application prospect on clinical diagnosis and biomedical analysis. |
| first_indexed | 2024-12-19T14:03:11Z |
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| language | English |
| last_indexed | 2024-12-19T14:03:11Z |
| publishDate | 2018-11-01 |
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| series | Nanomaterials |
| spelling | doaj.art-19d2fb6c05b04c1cb42ae81ebc14a57d2022-12-21T20:18:23ZengMDPI AGNanomaterials2079-49912018-11-0181297610.3390/nano8120976nano8120976Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub>Peng Ju0Yunhong He1Min Wang2Xiuxun Han3Fenghua Jiang4Chengjun Sun5Chi Wu6Institute of Marine Science and Technology, Shandong University, 72 Binhai Road, Qingdao 266237, ChinaKey Laboratory of Marine Chemistry Theory and Technology, Ministry of Education, Ocean University of China, 238 Songling Road, Qingdao 266100, ChinaShandong Provincial Key Laboratory of Chemical Energy Storage and Novel Cell Technology, Liaocheng University, Liaocheng 252000, ChinaInstitute of Semiconductor Materials, Jiangxi University of Science and Technology, 86 Hongqi Road, Ganzhou 341000, ChinaKey Laboratory of Marine Bioactive Substances and Analytical Technology, Marine Ecology Center, The First Institute of Oceanography, State Oceanic Administration (SOA), 6 Xianxialing Road, Qingdao 266061, ChinaKey Laboratory of Marine Bioactive Substances and Analytical Technology, Marine Ecology Center, The First Institute of Oceanography, State Oceanic Administration (SOA), 6 Xianxialing Road, Qingdao 266061, ChinaInstitute of Marine Science and Technology, Shandong University, 72 Binhai Road, Qingdao 266237, ChinaMoS<sub>2</sub> quantum dots (QDs) functionalized g-C<sub>3</sub>N<sub>4</sub> nanosheets (MoS<sub>2</sub>@CNNS) were prepared through a protonation-assisted ion exchange method, which were developed as a highly efficient biomimetic catalyst. Structural analysis revealed that uniformly-dispersed MoS<sub>2</sub> QDs with controllable size and different loading amount grew in-situ on the surface of CNNS, forming close-contact MoS<sub>2</sub>@CNNS nanostructures and exhibiting distinct surface properties. Compared to MoS<sub>2</sub> QDs and CNNS, the MoS<sub>2</sub>@CNNS nanocomposites exhibited a more than four times stronger peroxidase-like catalytic activity, which could catalyze the oxidation of 3,3’,5,5’-tetramethylbenzidine (TMB) in the presence of H<sub>2</sub>O<sub>2</sub> to generate a blue oxide. Among the MoS<sub>2</sub>@CNNS nanocomposites, MoS<sub>2</sub>@CNNS(30) was verified to present the best intrinsic peroxidase-like performance, which could be attributed to the more negative potential and larger specific surface area. A simple, rapid and ultrasensitive system for colorimetric detection of H<sub>2</sub>O<sub>2</sub> was thus successfully established based on MoS<sub>2</sub>@CNNS, displaying nice selectivity, reusability, and stability. The detection limit of H<sub>2</sub>O<sub>2</sub> could reach as low as 0.02 μM. Furthermore, the kinetic and active species trapping experiments indicated the peroxidase-like catalytic mechanism of MoS<sub>2</sub>@CNNS. This work develops a novel, rapid, and ultrasensitive approach for visual assay of H<sub>2</sub>O<sub>2</sub>, which has a potential application prospect on clinical diagnosis and biomedical analysis.https://www.mdpi.com/2079-4991/8/12/976MoS<sub>2</sub>g-C<sub>3</sub>N<sub>4</sub>peroxidase-likecolorimetric detectionH<sub>2</sub>O<sub>2</sub> |
| spellingShingle | Peng Ju Yunhong He Min Wang Xiuxun Han Fenghua Jiang Chengjun Sun Chi Wu Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> Nanomaterials MoS<sub>2</sub> g-C<sub>3</sub>N<sub>4</sub> peroxidase-like colorimetric detection H<sub>2</sub>O<sub>2</sub> |
| title | Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> |
| title_full | Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> |
| title_fullStr | Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> |
| title_full_unstemmed | Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> |
| title_short | Enhanced Peroxidase-Like Activity of MoS<sub>2</sub> Quantum Dots Functionalized g-C<sub>3</sub>N<sub>4</sub> Nanosheets towards Colorimetric Detection of H<sub>2</sub>O<sub>2</sub> |
| title_sort | enhanced peroxidase like activity of mos sub 2 sub quantum dots functionalized g c sub 3 sub n sub 4 sub nanosheets towards colorimetric detection of h sub 2 sub o sub 2 sub |
| topic | MoS<sub>2</sub> g-C<sub>3</sub>N<sub>4</sub> peroxidase-like colorimetric detection H<sub>2</sub>O<sub>2</sub> |
| url | https://www.mdpi.com/2079-4991/8/12/976 |
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