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Nanomaterials
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Synthesis and Performance of Nanostructured Metal Sulfides
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Synthesis and Performance of Nanostructured Metal Sulfides

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanofabrication and Nanomanufacturing".

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 6781

Special Issue Editor

Prof. Dr. Zhenhua Ge

E-Mail Website
Guest Editor
Faculty of Materials Science and Engineering, Kunming University of Science and Technology, Kunming 650093, China
Interests: thermoelectric materials; especially nanostructred binary metal sulfides

Special Issue Information

Dear Colleagues,

Nanostructured metal sulfides have been found to be potential energy materials, especially in the thermoelectric and photocatalytic fields. The synthesis methods of nanostructured metal sulfides include wet chemistry, hydrothermal synthesis, ball milling and spark plasma sintering, etc. Metal sulfides with nanostructure have shown interesting, surprising, and outstanding properties in energy materials fields. Every day, researchers around the globe develop new nanostructured metal sulfides with improved functionalities for any of these application fields. This Special Issue aims to provide a perspective on exciting new developments in nanostructured metal sulfides. We invite original research contributions or concise reviews both on the synthesis and characterization of nanostructured metal sulfides, as well as the various applications of new metal sulfides. We look forward to learning more about your most recent discoveries soon!

Prof. Dr. Zhenhua Ge
Guest Editor

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Keywords

  • thermoelectrics
  • metal sulfides
  • synthesis methods
  • nanopores
  • nano precipitates
  • nanostructures

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Published Papers (4 papers)

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Research

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11 pages, 4849 KiB  
Article
Optimized Thermoelectric Properties of Sulfide Compound Bi2SeS2 by Iodine Doping
by Chongbin Liang, Bushra Jabar, Chen Liu, Yuexing Chen, Zhuanghao Zheng, Ping Fan and Fu Li
Nanomaterials 2022, 12(14), 2434; https://doi.org/10.3390/nano12142434 - 15 Jul 2022
Cited by 4 | Viewed by 2093
Abstract
The Te-free compound Bi2SeS2 is considered as a potential thermoelectric material with less environmentally hazardous composition. Herein, the effect of iodine (I) substitution on its thermoelectric transport properties was studied. The electrical conductivity was enhanced due to the increased carrier [...] Read more.
The Te-free compound Bi2SeS2 is considered as a potential thermoelectric material with less environmentally hazardous composition. Herein, the effect of iodine (I) substitution on its thermoelectric transport properties was studied. The electrical conductivity was enhanced due to the increased carrier concentration caused by the carrier provided defect Ise. Thus, an enhanced power factor over 690 μWm−1K−2 was obtained at 300 K by combining a moderate Seebeck coefficient above 150 µV/K due to its large effective mass, which indicated iodine was an effective n-type dopant for Bi2SeS2. Furthermore, a large drop in the lattice thermal conductivity was observed due to the enhanced phonon scattering caused by nanoprecipitates, which resulted in a low total thermal conductivity (<0.95 Wm−1K−1) for all doped samples. Consequently, a maximum ZT value of 0.56 was achieved at 773 K for a Bi2Se1−xIxS2 (x = 1.1%) sample, a nearly threefold improvement compared to the undoped sample. Full article
(This article belongs to the Special Issue Synthesis and Performance of Nanostructured Metal Sulfides)
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10 pages, 3120 KiB  
Article
Quantitative Deviation of Nanocrystals Using the RIR Method in X-ray Diffraction (XRD)
by Qinyuan Huang, Chunjian Wang and Quan Shan
Nanomaterials 2022, 12(14), 2320; https://doi.org/10.3390/nano12142320 - 6 Jul 2022
Cited by 38 | Viewed by 3493
Abstract
The reference intensity ratio (RIR) method, using X-ray diffraction (XRD), is considered one most of the rapid and convenient approaches for phase quantification in multi-phase mixture, in which nanocrystals are commonly contained in a mixture and cause a broadening of the diffraction peak, [...] Read more.
The reference intensity ratio (RIR) method, using X-ray diffraction (XRD), is considered one most of the rapid and convenient approaches for phase quantification in multi-phase mixture, in which nanocrystals are commonly contained in a mixture and cause a broadening of the diffraction peak, while another broadening factor, instrumental broadening, does not attract enough attention in related quantitative analysis. Despite the specimen consisting of 50 wt.% TiO2 nanomaterials (nano-TiO2) and 50 wt.% microscale ZnO powder, the nano-TiO2 quantitative result changes from 56.53% to 43.33% that occur as a variation of instrumental broadening are caused by divergence slit adjustment. This deviation could be accounted through a mathematical model that involves instrumental broadening. The research in this paper might provide a useful guide for developing an approach to measure accuracy quantification in unknown multi-phase mixtures Full article
(This article belongs to the Special Issue Synthesis and Performance of Nanostructured Metal Sulfides)
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11 pages, 3372 KiB  
Article
Facile Synthesis Bi2Te3 Based Nanocomposites: Strategies for Enhancing Charge Carrier Separation to Improve Photocatalytic Activity
by Di Wu, Jun Guo, Zhen-Hua Ge and Jing Feng
Nanomaterials 2021, 11(12), 3390; https://doi.org/10.3390/nano11123390 - 14 Dec 2021
Cited by 10 | Viewed by 3008
Abstract
Varying structure Bi2Te3-based nanocomposite powders including pure Bi2Te3, Bi2Te3/Bi core−shell, and Bi2Te3/AgBiTe2 heterostructure were synthesized by hydrothermal synthesis using Bi2S3 as the template [...] Read more.
Varying structure Bi2Te3-based nanocomposite powders including pure Bi2Te3, Bi2Te3/Bi core−shell, and Bi2Te3/AgBiTe2 heterostructure were synthesized by hydrothermal synthesis using Bi2S3 as the template and hydrazine as the reductant. Successful realization of Bi2Te3-based nanostructures were concluded from XRD, FESEM, and TEM. In this work, the improvement in the performance of the rhodamine B (RhB) decomposition efficiency under visible light was discussed. The Bi2Te3/AgBiTe2 heterostructures revealed propitious photocatalytic performance ca. 90% after 60 min. The performance was over Bi2Te3/Bi core-shell nanostructures (ca. 40%) and more, exceeding pure Bi2Te3 (ca. 5%). The reason could be scrutinized in terms of the heterojunction structure, improving the interfacial contact between Bi2Te3 and AgBiTe2 and enabling retardation in the recombination rate of the photogenerated charge carriers. A credible mechanism of the charge transfer process in the Bi2Te3/AgBiTe2 heterostructures for the decomposition of an aqueous solution of RhB was also explicated. In addition, this work also investigated the stability and recyclability of a Bi2Te3/AgBiTe2 heterojunction nanostructure photocatalyst. In addition, this paper anticipates that the results possess broad potential in the photocatalysis field for the design of a visible light functional and reusable heterojunction nanostructure photocatalyst. Full article
(This article belongs to the Special Issue Synthesis and Performance of Nanostructured Metal Sulfides)
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Review

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25 pages, 9478 KiB  
Review
MgO Heterostructures: From Synthesis to Applications
by Tabasum Huma, Nadimullah Hakimi, Muhammad Younis, Tanzeel Huma, Zhenhua Ge and Jing Feng
Nanomaterials 2022, 12(15), 2668; https://doi.org/10.3390/nano12152668 - 3 Aug 2022
Cited by 7 | Viewed by 3872
Abstract
The energy storage capacity of batteries and supercapacitors has seen rising demand and problems as large-scale energy storage systems and electric gadgets have become more widely adopted. With the development of nano-scale materials, the electrodes of these devices have changed dramatically. Heterostructure materials [...] Read more.
The energy storage capacity of batteries and supercapacitors has seen rising demand and problems as large-scale energy storage systems and electric gadgets have become more widely adopted. With the development of nano-scale materials, the electrodes of these devices have changed dramatically. Heterostructure materials have gained increased interest as next-generation materials due to their unique interfaces, resilient structures and synergistic effects, providing the capacity to improve energy/power outputs and battery longevity. This review focuses on the role of MgO in heterostructured magnetic and energy storage devices and their applications and synthetic strategies. The role of metal oxides in manufacturing heterostructures has received much attention, especially MgO. Heterostructures have stronger interactions between tightly packed interfaces and perform better than single structures. Due to their typical physical and chemical properties, MgO heterostructures have made a breakthrough in energy storage. In perpendicularly magnetized heterostructures, the MgO’s thickness significantly affects the magnetic properties, which is good news for the next generation of high-speed magnetic storage devices. Full article
(This article belongs to the Special Issue Synthesis and Performance of Nanostructured Metal Sulfides)
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