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Ren Z, Ma H, Geng J, Liu C, Song C, Lv Y. ZnO QDs/GO/g-C 3N 4 Preparation and Photocatalytic Properties of Composites. MICROMACHINES 2023; 14:1501. [PMID: 37630037 PMCID: PMC10456475 DOI: 10.3390/mi14081501] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/12/2023] [Revised: 07/14/2023] [Accepted: 07/21/2023] [Indexed: 08/27/2023]
Abstract
Using an ultrasound-assisted chemical technique, ZnO quantum dot and ZnO composites were created. The optical characteristics and structural details of these composites were examined using TEM, XRD, XPS, FT-IR, UV-vis, and BET. The results revealed that both the ZnO quantum dot composite and ZnO composite exhibited outstanding optical properties, making them suitable for photocatalytic reactions. In order to analyze the photocatalytic performance, a degradation experiment was conducted using Rhodamine B solution as the simulation dye wastewater. The experiment demonstrated that the degradation of Rhodamine B followed the first-order reaction kinetics equation when combined with the photocatalytic reaction kinetics. Moreover, through cyclic stability testing, it was determined that the ZnO QDs-GO-g-C3N4 composite sample showed good stability and could be reused. The degradation rates of Rhodamine B solution using ZnO-GO-g-C3N4 and ZnO QDs-GO-g-C3N4 reached 95.25% and 97.16%, respectively. Furthermore, free-radical-trapping experiments confirmed that ·O2- was the main active species in the catalytic system and its photocatalytic mechanism was elucidated. The photocatalytic oxidation of ZnO quantum dots in this study has important reference value and provides a new idea for the subsequent research.
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Affiliation(s)
- Zhixin Ren
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
| | - Huachao Ma
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
| | - Jianxin Geng
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
| | - Cuijuan Liu
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
| | - Chaoyu Song
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
- School of Chemistry and Chemical Engineering, Shanghai Jiao Tong University, Shanghai 200240, China
| | - Yuguang Lv
- College of Pharmacy, Jiamusi University, Jiamusi 154000, China
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Aguillon F, Borisov AG. Atomic-Scale Defects Might Determine the Second Harmonic Generation from Plasmonic Graphene Nanostructures. J Phys Chem Lett 2023; 14:238-244. [PMID: 36594888 DOI: 10.1021/acs.jpclett.2c03205] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 06/17/2023]
Abstract
In this work, we theoretically investigate the impact of the atomic scale lattice imperfections of graphene nanoflakes on their nonlinear response enhanced by the resonance between an incident electromagnetic field and localized plasmon. As a case study, we address the second harmonic generation from graphene plasmonic nanoantennas of different symmetries with missing carbon atom vacancy defects in the honeycomb lattice. Using the many-body time-dependent density matrix approach, we find that one defect in the nanoflake comprising over five thousand carbon atoms can strongly impact the nonlinear hyperpolarizability and override the symmetry constraints. The effect reported here cannot be captured using the relaxation time approximation within the quantum or classical framework. Results obtained in this work have thus important implications for the design of nonlinear graphene devices.
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Affiliation(s)
- François Aguillon
- Institut des Sciences Moléculaires d'Orsay, UMR 8214, CNRS, Université Paris-Saclay, Bâtiment 520, 91405 Orsay Cedex, France
| | - Andrei G Borisov
- Institut des Sciences Moléculaires d'Orsay, UMR 8214, CNRS, Université Paris-Saclay, Bâtiment 520, 91405 Orsay Cedex, France
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Jia J, Zhu Z, Gong C, Li M, Zhang J, Song Y, She Y. Synthesis and third-order nonlinear properties of D-A-D structure acridone derivatives. CHEMICAL PAPERS 2022. [DOI: 10.1007/s11696-022-02612-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/23/2022]
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Zhang Y, Li H, Wu QY, Gu L. Non-covalent functionalization of graphene sheets by pyrene-endcapped tetraphenylethene: Enhanced aggregation-induced emission effect and application in explosive detection. Front Chem 2022; 10:970033. [PMID: 36034660 PMCID: PMC9403001 DOI: 10.3389/fchem.2022.970033] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/15/2022] [Accepted: 07/18/2022] [Indexed: 12/03/2022] Open
Abstract
In this work, a dispersible graphene-based material with a characteristic of aggregation-induced emission (AIE) was prepared by wet chemical reduction of graphene oxide (GO). During the GO reduction process, a conjugated molecule TPEP containing tetraphenylethylene (TPE) and pyrene was employed as a stabilizer because of the π–π interactions and the wrapping effect. The as-prepared rGO-TPEP not only has good dispersion in solution but also processes the AIE feature. Its fluorescence intensity is 2.23 times higher than that of TPEP at the same condition. The unique optical properties and AIE effect enable the rGO-TPEP as a chemical sensor for highly sensitive explosive detection in aggregated state and solid state. In the aggregated state, trace 2,4-dinitrotoluene (DNT) can be detected by the rGO-TPEP even when the concentration is as low as 0.91 ppm, and the quenching constant is as high as 2.47 × 104 M-1.
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Affiliation(s)
| | | | | | - Lin Gu
- *Correspondence: Qing-Yun Wu, ; Lin Gu,
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Zhang M, Han N, Wang J, Zhang Z, Liu K, Sun Z, Zhao J, Gan X. Strong Second Harmonic Generation from Bilayer Graphene with Symmetry Breaking by Redox-Governed Charge Doping. NANO LETTERS 2022; 22:4287-4293. [PMID: 35608997 DOI: 10.1021/acs.nanolett.1c04359] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/15/2023]
Abstract
Missing second-order nonlinearity in centrosymmetric graphene overshadows its intriguing optical attribute. Here, we report redox-governed charge doping could effectively break the centrosymmetry of bilayer graphene (BLG), enabling a strong second harmonic generation (SHG) with a strength close to that of the well-known monolayer MoS2. Verified from control experiments with in situ electrical current annealing and electrically gate-controlled SHG, the required centrosymmetry breaking of the emerging SHG arises from the charge-doping on the bottom layer of BLG by the oxygen/water redox couple. Our results not only reveal that charge doping is an effective way to break the inversion symmetry of BLG despite its strong interlayer coupling but also indicate that SHG spectroscopy is a valid technique to probe molecular doping on two-dimensional materials.
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Affiliation(s)
- Mingwen Zhang
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
| | - Nannan Han
- Frontiers Science Center for Flexible Electronics, Xi'an Institute of Flexible Electronics (IFE), and Xi'an Institute of Biomedical Materials & Engineering, Northwestern Polytechnical University, Xi'an 710129, China
| | - Jing Wang
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
| | - Zhihong Zhang
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics, Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
| | - Kaihui Liu
- State Key Lab for Mesoscopic Physics and Frontiers Science Center for Nano-Optoelectronics, Collaborative Innovation Center of Quantum Matter, School of Physics, Peking University, Beijing 100871, China
| | - Zhipei Sun
- Department of Electronics and Nanoengineering and QTF Centre of Excellence, Aalto University, Aalto FI-00076, Finland
| | - Jianlin Zhao
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
| | - Xuetao Gan
- Key Laboratory of Light Field Manipulation and Information Acquisition, Ministry of Industry and Information Technology, and Shaanxi Key Laboratory of Optical Information Technology, School of Physical Science and Technology, Northwestern Polytechnical University, Xi'an 710129, China
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Affiliation(s)
- Xiaoyang Zhu
- Department of Chemistry, Columbia University, New York, New York 10027, USA
| | - David R Reichman
- Department of Chemistry, Columbia University, New York, New York 10027, USA
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