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Molecules
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Synthesis and Applications of Semiconductor Nanomaterials
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Synthesis and Applications of Semiconductor Nanomaterials

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

Deadline for manuscript submissions: closed (31 July 2024) | Viewed by 3781

Special Issue Editor

Dr. Frank Güell

E-Mail Website
Guest Editor
ENFOCAT-IN2UB, Universitat de Barcelona, Barcelona, Spain
Interests: nanomaterials; optical properties; semiconductors; synthesis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue will address the following topics: i) growth and nucleation mechanisms of semiconductor nanomaterials, ii) fundamental properties of semiconductor nanomaterials, including doping, surfaces and interfaces, and iii) applications including photovoltaic cells, piezoelectric devices, self-powered devices and batteries, sensors and catalysis.

Dr. Frank Güell
Guest Editor

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Molecules is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2700 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • semiconductors
  • nanomaterials
  • doping
  • batteries
  • sensors
  • catalysis

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Published Papers (2 papers)

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Research

16 pages, 12888 KiB  
Article
Enhanced Oxygen Storage Capacity of Porous CeO2 by Rare Earth Doping
by Yaohui Xu, Liangjuan Gao, Quanhui Hou, Pingkeng Wu, Yunxuan Zhou and Zhao Ding
Molecules 2023, 28(16), 6005; https://doi.org/10.3390/molecules28166005 - 10 Aug 2023
Cited by 8 | Viewed by 1875
Abstract
CeO2 is an important rare earth (RE) oxide and has served as a typical oxygen storage material in practical applications. In the present study, the oxygen storage capacity (OSC) of CeO2 was enhanced by doping with other rare earth ions (RE, [...] Read more.
CeO2 is an important rare earth (RE) oxide and has served as a typical oxygen storage material in practical applications. In the present study, the oxygen storage capacity (OSC) of CeO2 was enhanced by doping with other rare earth ions (RE, RE = Yb, Y, Sm and La). A series of Undoped and RE–doped CeO2 with different doping levels were synthesized using a solvothermal method following a subsequent calcination process, in which just Ce(NO3)3∙6H2O, RE(NO3)3∙nH2O, ethylene glycol and water were used as raw materials. Surprisingly, the Undoped CeO2 was proved to be a porous material with a multilayered special morphology without any additional templates in this work. The lattice parameters of CeO2 were refined by the least–squares method with highly pure NaCl as the internal standard for peak position calibrations, and the solubility limits of RE ions into CeO2 were determined; the amounts of reducible–reoxidizable Cen+ ions were estimated by fitting the Ce 3d core–levels XPS spectra; the non–stoichiometric oxygen vacancy (VO) defects of CeO2 were analyzed qualitatively and quantitatively by O 1s XPS fitting and Raman scattering; and the OSC was quantified by the amount of H2 consumption per gram of CeO2 based on hydrogen temperature programmed reduction (H2–TPR) measurements. The maximum [OSC] of CeO2 appeared at 5 mol.% Yb–, 4 mol.% Y–, 4 mol.% Sm– and 7 mol.% La–doping with the values of 0.444, 0.387, 0.352 and 0.380 mmol H2/g by an increase of 93.04, 68.26, 53.04 and 65.22%. Moreover, the dominant factor for promoting the OSC of RE–doped CeO2 was analyzed. Full article
(This article belongs to the Special Issue Synthesis and Applications of Semiconductor Nanomaterials)
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10 pages, 5276 KiB  
Article
Nickel-Atom Doping as a Potential Means to Enhance the Photoluminescence Performance of Carbon Dots
by Wenqi Kong, Can Li, Zhongqi Sun, Fucheng Gao, Jinfan Zheng and Yanyan Jiang
Molecules 2023, 28(14), 5526; https://doi.org/10.3390/molecules28145526 - 20 Jul 2023
Cited by 3 | Viewed by 1466
Abstract
Heteroatom doping, particularly with nonmetallic atoms such as N, P, and S, has proven to be an effective strategy for modulating the fluorescent properties of carbon dots (CDs). However, there are few reports on the regulation of the photoluminescence of CDs by transition-metal [...] Read more.
Heteroatom doping, particularly with nonmetallic atoms such as N, P, and S, has proven to be an effective strategy for modulating the fluorescent properties of carbon dots (CDs). However, there are few reports on the regulation of the photoluminescence of CDs by transition-metal doping. In this work, nickel-doped CDs (Ni-CDs) were fabricated using the hydrothermal approach. Ni atoms were incorporated into the sp2 domains of the CDs through Ni-N bonds, resulting in an increased degree of graphitization of the Ni-CDs. Additionally, Ni-atom doping served to shorten the electron transition and recombination lifetimes, and suppress the nonradiative recombination process, resulting in an absolute fluorescence quantum yield of 54.7% for the Ni-CDs. Meanwhile, the as-prepared Ni-CDs exhibited excellent biocompatibility and were utilized for fluorescent bioimaging of HeLa cells. Subsequently, the Ni-CDs were employed as fluorescent anticounterfeiting inks for the successful encryption of two-dimensional barcodes. Our work demonstrates a novel heteroatom doping strategy for the synthesis of highly fluorescence-emitting CDs. Full article
(This article belongs to the Special Issue Synthesis and Applications of Semiconductor Nanomaterials)
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