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Nunes PJ, Pereira RFP, Nunes SC, Correia SFH, Fu L, Ferreira RAS, Fernandes M, Bermudez VDZ. POE-Mediated Tunable Quantum Yield of Carbon Dots-Derived From Agapanthus Africanus (L.) Hoffmann Leaves. SMALL (WEINHEIM AN DER BERGSTRASSE, GERMANY) 2024:e2404717. [PMID: 39359048 DOI: 10.1002/smll.202404717] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/10/2024] [Revised: 09/17/2024] [Indexed: 10/04/2024]
Abstract
The green synthesis of carbon dots (CDs) from natural sources is a challenging goal. Herein CDs are produced from Agapanthus africanus (L.) Hoffmann leaves by carbonization at 200/300 °C for 2/3 h. Samples are named CZ-X-Y, where Z, X, and Y represent carbonization, temperature, and time, respectively. CZ-200-3, CZ-300-2, and CZ-300-3 CDs have average sizes of 3.7 ± 0.7, 5.3 ± 1.2, and 5.1 ± 1.6 nm, respectively. Their surface, devoid of chlorophyll, contains ─OH, ─C═O, and ─C(═O)OH groups and sylvite. Isolated CZ-300-3 emits at 400 nm (excited at 260 nm) and exhibits an emission quantum yield (QY) value of 2 ± 1%. Embedding in the d-U(600)/d-(900) di-ureasil matrices resulted in transparent films with emission intensity maxima at 420/450 nm (360 nm), and QY values of 7 ± 1/16 ± 2% (400 nm). The enhancement of the QY value of the bare CDs agrees with an efficient passivation provided by the hybrid host. The hydrophilic CZ-300-3 CDs also exerted a marked surface modifying role, changing the surface roughness and the wettability of the hybrid films.
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Affiliation(s)
- Paulo J Nunes
- CQ-VR, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal
| | - Rui F P Pereira
- Centre of Chemistry, University of Minho, Braga, 4710-057, Portugal
| | - S C Nunes
- Chemistry Department and FibEnTech - Fiber Materials and Environmental Technologies, University of Beira Interior, Covilhã, 6201-001, Portugal
| | - Sandra F H Correia
- Instituto de Telecomunicações and University of Aveiro, Campus Universitário de Santiago, Aveiro, 3810-193, Portugal
| | - Lianshe Fu
- Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Rute A S Ferreira
- Physics Department and CICECO-Aveiro Institute of Materials, University of Aveiro, Aveiro, 3810-193, Portugal
| | - Mariana Fernandes
- CQ-VR, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal
- Chemistry Department, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal
| | - Verónica de Zea Bermudez
- CQ-VR, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal
- Chemistry Department, University of Trás-os-Montes e Alto Douro, Vila Real, 5000-801, Portugal
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Correia SFH, Fu L, Dias LMS, Pereira RFP, de Zea Bermudez V, André PS, Ferreira RAS. An autonomous power temperature sensor based on window-integrated transparent PV using sustainable luminescent carbon dots. NANOSCALE ADVANCES 2023; 5:3428-3438. [PMID: 37383075 PMCID: PMC10295119 DOI: 10.1039/d3na00136a] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Grants] [Track Full Text] [Figures] [Subscribe] [Scholar Register] [Received: 03/03/2023] [Accepted: 04/06/2023] [Indexed: 06/30/2023]
Abstract
The energy efficiency of buildings can be significantly improved through the use of renewable energy sources. Luminescent solar concentrators (LSCs) appear to be a solution for integrating photovoltaic (PV) devices into the structure of buildings (windows, for instance) to enable low-voltage devices to be powered. Here, we present transparent planar and cylindrical LSCs based on carbon dots in an aqueous solution and dispersed in organic-inorganic hybrid matrices, which present photoluminescent quantum yield values up to 82%, facilitating an effective solar photon conversion. These LSCs showed the potencial for being incorporated as building windows due to an average light transmittance of up to ∼91% and color rendering index of up to 97, with optical and power conversion efficiency values of 5.4 ± 0.1% and 0.18 ± 0.01%, respectively. In addition, the fabricated devices showed temperature sensing ability enabling the fabrication of an autonomous power mobile temperature sensor. Two independent thermometric parameters were established based on the emission and the electrical power generated by the LSC-PV system, which could both be accessed by a mobile phone, enabling mobile optical sensing through multiparametric thermal reading with relative sensitivity values up to 1.0% °C-1, making real-time mobile temperature sensing accessible to all users.
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Affiliation(s)
- Sandra F H Correia
- Instituto de Telecomunicações and University of Aveiro, Campus Universitário de Santiago 3810-193 Aveiro Portugal
| | - Lianshe Fu
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro 3810-193 Aveiro Portugal
| | - Lília M S Dias
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro 3810-193 Aveiro Portugal
- Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, University of Lisbon 1049-001 Lisbon Portugal
| | - Rui F P Pereira
- Chemistry Center and Chemistry Department, University of Minho 4710-057 Braga Portugal
| | - V de Zea Bermudez
- Chemistry Department and CQ-VR, University of Trás-os-Montes e Alto Douro 5000-801 Vila Real Portugal
| | - Paulo S André
- Department of Electrical and Computer Engineering and Instituto de Telecomunicações, Instituto Superior Técnico, University of Lisbon 1049-001 Lisbon Portugal
| | - Rute A S Ferreira
- Department of Physics and CICECO - Aveiro Institute of Materials, University of Aveiro 3810-193 Aveiro Portugal
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Animated organic-inorganic hybrid materials and their use as catalyst scaffolds. Catal Today 2022. [DOI: 10.1016/j.cattod.2022.09.019] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
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Liu H, Fu ZE, Song F, Liu Q, Chen L. The controllable construction and properties characterization of organic–inorganic hybrid materials based on benzoxazine-bridged polysilsesquioxanes. RSC Adv 2017. [DOI: 10.1039/c6ra26150g] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022] Open
Abstract
Some controllable morphology organic–inorganic hybrid materials have been prepared via the homopolymerization of benzoxazine-bridged polysilsesquioxanes precursors with different degrees of the triethoxysilane hydrolysis condensation.
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Affiliation(s)
- Huan Liu
- College of Materials Science and Engineering
- Hunan University of Science and Technology
- Xiangtan
- People's Republic of China
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers
| | - Zi-en Fu
- Key Laboratory of Polymer Material for Electronics
- Guangzhou Institute of Chemistry
- Chinese Academy of Sciences
- Guangzhou 510650
- People's Republic of China
| | - Fei Song
- College of Materials Science and Engineering
- Hunan University of Science and Technology
- Xiangtan
- People's Republic of China
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers
| | - Qingquan Liu
- College of Materials Science and Engineering
- Hunan University of Science and Technology
- Xiangtan
- People's Republic of China
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers
| | - Lijuan Chen
- College of Materials Science and Engineering
- Hunan University of Science and Technology
- Xiangtan
- People's Republic of China
- Hunan Provincial Key Laboratory of Controllable Preparation and Functional Application of Fine Polymers
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Liu HC, Su WC, Liu YL. Self-assembled benzoxazine-bridged polysilsesquioxanes exhibiting ultralow-dielectric constants and yellow-light photoluminescent emission. ACTA ACUST UNITED AC 2011. [DOI: 10.1039/c1jm10815h] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.9] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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