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Molecules
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Novel Carbon Nanomaterials: Preparation and Photoelectric Properties
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Novel Carbon Nanomaterials: Preparation and Photoelectric Properties

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Nanochemistry".

Deadline for manuscript submissions: closed (28 February 2023) | Viewed by 11498

Special Issue Editor

Prof. Dr. Liang Wang

E-Mail Website
Guest Editor
School of Environmental and Chemical Engineering, Shanghai University, Shanghai, China
Interests: zero/two-dimensional nanomaterials; photoelectric property regulation; photocatalysis; electrocatalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Novel carbon nanomaterials have attracted a considerable amount of interest because of their unique physicochemical, structural, and photoelectric characteristics. These can pave a way to promote the development of optoelectronic devices, sensors, LEDs, displays, and solar cells fields. It is possible to finely tune their photoelectric properties suiting specific requirements. Important examples of these materials include carbon quantum dots, graphdiyne, C3N4 and hybrids.

The rapid development of technology for creating new nanostructures requires the research community to comprehensively analyze their optoelectronic properties. This Special Issue will provide excellent opportunities of the novel carbon nanostructures and will broaden the scope of nanostructure applications. We invite you to contribute full papers, reviews, or communications to this Special Issue. In all cases, the papers must demonstrate novelty and relevance to the scope. Of course, applications of novel carbon nanomaterials in different fields of science and technology will be welcome.

Prof. Dr. Liang Wang
Guest Editor

Manuscript Submission Information

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Keywords

  • Carbon nanomaterials
  • Carbon quantum dots
  • Preparation
  • Optical property regulation
  • Photoelectric properties
  • Optoelectronic devices
  • Sensors
  • LEDs
  • Display
  • Solar cells

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Published Papers (4 papers)

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Research

14 pages, 5717 KiB  
Article
Engineered Graphene Quantum Dots as a Magnetic Resonance Signal Amplifier for Biomedical Imaging
by Zhongtao Li, Guiqiang Qi, Guangyue Shi, Meng Zhang, Haifeng Hu and Liguo Hao
Molecules 2023, 28(5), 2363; https://doi.org/10.3390/molecules28052363 - 3 Mar 2023
Cited by 7 | Viewed by 2572
Abstract
The application of magnetic resonance imaging (MRI) nano-contrast agents (nano-CAs) has increasingly attracted scholarly interest owing to their size, surface chemistry, and stability. Herein, a novel T1 nano-CA (Gd(DTPA)−GQDs) was successfully prepared through the functionalization of graphene quantum dots with poly(ethylene glycol) bis(amine) [...] Read more.
The application of magnetic resonance imaging (MRI) nano-contrast agents (nano-CAs) has increasingly attracted scholarly interest owing to their size, surface chemistry, and stability. Herein, a novel T1 nano-CA (Gd(DTPA)−GQDs) was successfully prepared through the functionalization of graphene quantum dots with poly(ethylene glycol) bis(amine) and their subsequent incorporation into Gd-DTPA. Remarkably, the resultant as-prepared nano-CA displayed an exceptionally high longitudinal proton relaxivity (r1) of 10.90 mM−1 s−1 (R2 = 0.998), which was significantly higher than that of commercial Gd-DTPA (4.18 mM−1 s−1, R2 = 0.996). The cytotoxicity studies indicated that the Gd(DTPA)−GQDs were not cytotoxic by themselves. The results of the hemolysis assay and the in vivo safety evaluation demonstrate the outstanding biocompatibility of Gd(DTPA)−GQDs. The in vivo MRI study provides evidence that Gd(DTPA)−GQDs exhibit exceptional performance as T1-CAs. This research constitutes a viable approach for the development of multiple potential nano-CAs with high-performance MR imaging capabilities. Full article
(This article belongs to the Special Issue Novel Carbon Nanomaterials: Preparation and Photoelectric Properties)
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11 pages, 3103 KiB  
Article
Awn Stem-Derived High-Activity Free-Metal Porous Carbon for Oxidation Reduction
by Qingyun Zhao, Shikai Wen and Junhua Hou
Molecules 2021, 26(19), 6071; https://doi.org/10.3390/molecules26196071 - 8 Oct 2021
Viewed by 1640
Abstract
Designing oxygen reduction reaction (ORR) catalysts with excellent performance has far-reaching significance. In this work, a high-activity biomass free-metal carbon catalyst with N and S co-doped was successfully prepared by using the KOH activated awn stem powder as the precursor with organic matter [...] Read more.
Designing oxygen reduction reaction (ORR) catalysts with excellent performance has far-reaching significance. In this work, a high-activity biomass free-metal carbon catalyst with N and S co-doped was successfully prepared by using the KOH activated awn stem powder as the precursor with organic matter pore-forming doping technology, which is named TAAS. The content of pyridine nitrogen groups accounts for up to 36% of the total nitrogen content, and a rich pore structure is formed on the surface and inside, which are considered as the potential active centers of ORR. The results show that the specific surface area of TAAS reaches 191.04 m2/g, which effectively increases the active sites of the catalyst, and the initial potential and half slope potential are as high as 0.90 and 0.76 V vs. RHE, respectively. This study provides a low-cost, environmentally friendly and feasible strategy for the conversion of low-value agricultural and forestry wastes into high value-added products to promote sustainable development of energy and the environment. Full article
(This article belongs to the Special Issue Novel Carbon Nanomaterials: Preparation and Photoelectric Properties)
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8 pages, 1831 KiB  
Communication
Chlorine Modulation Fluorescent Performance of Seaweed-Derived Graphene Quantum Dots for Long-Wavelength Excitation Cell-Imaging Application
by Weitao Li, Ningjia Jiang, Bin Wu, Yuan Liu, Luoman Zhang and Jianxin He
Molecules 2021, 26(16), 4994; https://doi.org/10.3390/molecules26164994 - 18 Aug 2021
Cited by 11 | Viewed by 2471
Abstract
Biological imaging is an essential means of disease diagnosis. However, semiconductor quantum dots that are used in bioimaging applications comprise toxic metal elements that are nonbiodegradable, causing serious environmental problems. Herein, we developed a novel ecofriendly solvothermal method that uses ethanol as a [...] Read more.
Biological imaging is an essential means of disease diagnosis. However, semiconductor quantum dots that are used in bioimaging applications comprise toxic metal elements that are nonbiodegradable, causing serious environmental problems. Herein, we developed a novel ecofriendly solvothermal method that uses ethanol as a solvent and doping with chlorine atoms to prepare highly fluorescent graphene quantum dots (GQDs) from seaweed. The GQDs doped with chlorine atoms exhibit high-intensity white fluorescence. Thus, their preliminary application in bioimaging has been confirmed. In addition, clear cell imaging could be performed at an excitation wavelength of 633 nm. Full article
(This article belongs to the Special Issue Novel Carbon Nanomaterials: Preparation and Photoelectric Properties)
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10 pages, 2636 KiB  
Communication
Size Effect of Graphene Quantum Dots on Photoluminescence
by Ziyi Liu, Fei Li, Yi Luo, Ming Li, Guanghui Hu, Xianjuan Pu, Tao Tang, Jianfeng Wen, Xinyu Li and Weitao Li
Molecules 2021, 26(13), 3922; https://doi.org/10.3390/molecules26133922 - 26 Jun 2021
Cited by 37 | Viewed by 3994
Abstract
High-photoluminescence (PL) graphene quantum dots (GQDs) were synthesized by a simple one-pot hydrothermal process, then separated by dialysis bags of different molecular weights. Four separated GQDs of varying sizes were obtained and displayed different PL intensities. With the decreasing size of separated GQDs, [...] Read more.
High-photoluminescence (PL) graphene quantum dots (GQDs) were synthesized by a simple one-pot hydrothermal process, then separated by dialysis bags of different molecular weights. Four separated GQDs of varying sizes were obtained and displayed different PL intensities. With the decreasing size of separated GQDs, the intensity of the emission peak becomes much stronger. Finally, the GQDs of the smallest size revealed the most energetic PL intensity in four separated GQDs. The PL energy of all the separated GQDs shifted slightly, supported by density functional theory calculations. Full article
(This article belongs to the Special Issue Novel Carbon Nanomaterials: Preparation and Photoelectric Properties)
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