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Engineering highly graphitic carbon quantum dots by catalytic dehydrogenation and carbonization of Ti3C2Tx-MXene wrapped polystyrene spheres.

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Title: Engineering highly graphitic carbon quantum dots by catalytic dehydrogenation and carbonization of Ti3C2Tx-MXene wrapped polystyrene spheres.
Authors: Chen, Hao-Ran1 (AUTHOR), Meng, Wei-Ming1 (AUTHOR), Wang, Ri-Yuan1 (AUTHOR), Chen, Fang-Lin1 (AUTHOR), Li, Tao1 (AUTHOR), Wang, Ding-Ding1 (AUTHOR), Wang, Feng1 (AUTHOR), Zhu, San-E1 (AUTHOR), Wei, Chun-Xiang1 (AUTHOR), Lu, Hong-Dian1 (AUTHOR) hdlu@ustc.edu.cn, Yang, Wei1 (AUTHOR) yangwei@hfuu.edu.cn
Source: Carbon. Apr2022, Vol. 190, p319-328. 10p.
Subjects: Catalytic dehydrogenation, Carbonization, Polystyrene, Polymeric nanocomposites, Quantum dots, Carbon
Abstract: The catalytic dehydrogenation of Ti 3 C 2 T x -MXene nanosheets induced by their surface terminating C-Ti-O group has attracted tremendous interests in the fabrication of unsaturated organics and carbon materials. Herein, the highly graphitic carbon quantum dots (CQDs) were synthesized by pyrolyzing cationic polystyrene (CPS) spheres which were wrapped by Ti 3 C 2 T x -MXene nanosheets. The morphological features and fluorescent properties of the as-prepared CQDs were characterized and the growth mechanism of CQDs was proposed. In this unique hybrid model, Ti 3 C 2 T x -MXene exhibited high efficiency in catalyzing dehydrogenation and carbonization of CPS to highly graphitic CQDs at a relatively low pyrolysis temperature of 410 °C. During the pyrolysis, Ti 3 C 2 T x -MXene shell acted as a closed barrier to retain the volatilization of degradation products of CPS and promote their diffusion into the MXene interlayers. Simultaneously, lots of CPS degradation products were adhered to the surface of Ti 3 C 2 T x -MXene nanosheets, where the dehydrogenation was carried out by the C-Ti-O catalytic active sites. Eventually, they were carbonized to highly graphitic CQDs with excellent photoluminescence behavior. This work provides a facile strategy to convert polystyrene matrix into graphitic carbon-based material, which helps to develop the catalytic carbonization mechanism of MXene/polymer nanocomposites. [Display omitted] [ABSTRACT FROM AUTHOR]
Copyright of Carbon is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
Database: Engineering Source
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DbLabel: Engineering Source
An: 155527324
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PubType: Academic Journal
PubTypeId: academicJournal
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  Data: Engineering highly graphitic carbon quantum dots by catalytic dehydrogenation and carbonization of Ti3C2Tx-MXene wrapped polystyrene spheres.
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  Data: <searchLink fieldCode="AR" term="%22Chen%2C+Hao-Ran%22">Chen, Hao-Ran</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Meng%2C+Wei-Ming%22">Meng, Wei-Ming</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Ri-Yuan%22">Wang, Ri-Yuan</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Chen%2C+Fang-Lin%22">Chen, Fang-Lin</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Li%2C+Tao%22">Li, Tao</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Ding-Ding%22">Wang, Ding-Ding</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wang%2C+Feng%22">Wang, Feng</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Zhu%2C+San-E%22">Zhu, San-E</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Wei%2C+Chun-Xiang%22">Wei, Chun-Xiang</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Lu%2C+Hong-Dian%22">Lu, Hong-Dian</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> hdlu@ustc.edu.cn</i><br /><searchLink fieldCode="AR" term="%22Yang%2C+Wei%22">Yang, Wei</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> yangwei@hfuu.edu.cn</i>
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  Label: Abstract
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  Data: The catalytic dehydrogenation of Ti 3 C 2 T x -MXene nanosheets induced by their surface terminating C-Ti-O group has attracted tremendous interests in the fabrication of unsaturated organics and carbon materials. Herein, the highly graphitic carbon quantum dots (CQDs) were synthesized by pyrolyzing cationic polystyrene (CPS) spheres which were wrapped by Ti 3 C 2 T x -MXene nanosheets. The morphological features and fluorescent properties of the as-prepared CQDs were characterized and the growth mechanism of CQDs was proposed. In this unique hybrid model, Ti 3 C 2 T x -MXene exhibited high efficiency in catalyzing dehydrogenation and carbonization of CPS to highly graphitic CQDs at a relatively low pyrolysis temperature of 410 °C. During the pyrolysis, Ti 3 C 2 T x -MXene shell acted as a closed barrier to retain the volatilization of degradation products of CPS and promote their diffusion into the MXene interlayers. Simultaneously, lots of CPS degradation products were adhered to the surface of Ti 3 C 2 T x -MXene nanosheets, where the dehydrogenation was carried out by the C-Ti-O catalytic active sites. Eventually, they were carbonized to highly graphitic CQDs with excellent photoluminescence behavior. This work provides a facile strategy to convert polystyrene matrix into graphitic carbon-based material, which helps to develop the catalytic carbonization mechanism of MXene/polymer nanocomposites. [Display omitted] [ABSTRACT FROM AUTHOR]
– Name: AbstractSuppliedCopyright
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  Data: <i>Copyright of Carbon is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.)
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RecordInfo BibRecord:
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      – Type: doi
        Value: 10.1016/j.carbon.2022.01.028
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      – Code: eng
        Text: English
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      Pagination:
        PageCount: 10
        StartPage: 319
    Subjects:
      – SubjectFull: Catalytic dehydrogenation
        Type: general
      – SubjectFull: Carbonization
        Type: general
      – SubjectFull: Polystyrene
        Type: general
      – SubjectFull: Polymeric nanocomposites
        Type: general
      – SubjectFull: Quantum dots
        Type: general
      – SubjectFull: Carbon
        Type: general
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      – TitleFull: Engineering highly graphitic carbon quantum dots by catalytic dehydrogenation and carbonization of Ti3C2Tx-MXene wrapped polystyrene spheres.
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              Text: Apr2022
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