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Nanomaterials
Special Issues
Semiconductor Nanomaterials: Growth, Properties and Applications
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Semiconductor Nanomaterials: Growth, Properties and Applications

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Nanoelectronics, Nanosensors and Devices".

Deadline for manuscript submissions: closed (30 June 2021) | Viewed by 15672

Special Issue Editors

Prof. Dr. Sotirios Baskoutas

E-Mail Website
Guest Editor
Department of Materials Science, University of Patras, 265 04 Patras, Greece
Interests: semiconductor nanostructures; optical properties; energy transfer; sensors; carbon dots from biowaste
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Ahmad Umar

E-Mail Website
Guest Editor
Department of Chemistry, Faculty of Science and Arts and Promising Centre for Sensors and Electronic Devices, Najran University, Najran, Saudi Arabia
Interests: semiconductor nanotechnology; functional nanomaterials; sensors; electronic and energy devices; environmental remediation; bio-applications of functional nanomaterials
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

In the last few decades, there has been great and unpredicted progress in the synthesis, characterization, and potential applications of semiconductor nanomaterials. Semiconductor nanomaterials have shown their applicability for a range of technologies because of their enhanced and improved physical, chemical, and functional properties. Such nanomaterials are used for a variety of potential applications, from electronics to sensor devices to energy, environmental remediation, medical fields, and so on. Over the past decades, the physics and chemistry of semiconductor nanomaterials have been emerging topics in nanoscience and nanotechnology, as such nanomaterials have shown extraordinary and advantageous properties and hence applications based thereon. The rapid development of semiconductor nanomaterials provides the possibility of designing better and unique devices with outstanding properties.

This Special Issue is a timely approach to survey recent progress in the area of semiconductor nanomaterials synthesis, properties, and applications. The articles presented in this Special Issue will cover various topics, ranging from semiconductor nanomaterials preparation, engineering, functionalization, and their various applications, such as sensors (chemical, biological, gas, etc.), environmental remediation, biological labeling, fuel cell, electrocatalysis, catalysis, photocatalysis, electronic devices, bio-applications of nanomaterials, and so on. Certainly, the coverage is not complete, but it is our intension that this Special Issue will offer a unique glimpse of what has been achieved and what remains to be explored in functional nanomaterials.

This Special Issue will cover topics including but not limited to:

- Synthesis and characterizations of semiconductor nanomaterials;

- Sensors (bio, chemical, gas, optical, etc.);

- Photocatalysis;

- Catalysis;

- Environmental remediation;

- Electronic devices;

- Energy devices;

- Bio-applications of functional nanomaterials;

- Theoretical studies;

- etc.

It is our pleasure to invite you to submit review articles, original papers, and communications for this Special Issue "Semiconductor Nanomaterials: Growth, Properties, and Applications".

Prof. Dr. Sotirios Baskoutas
Prof. Dr. Ahmad Umar
Guest Editors

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. Nanomaterials 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 2900 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

  • semiconductor nanomaterials
  • sensors
  • photocatalysis
  • catalysis
  • environmental remediation
  • electronic devices
  • energy devices
  • bio applications
  • theoretical studies

Published Papers (4 papers)

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Research

15 pages, 4941 KiB  
Article
Tandem Structures Semiconductors Based on TiO2_SnO2 and ZnO_SnO2 for Photocatalytic Organic Pollutant Removal
by Alexandru Enesca and Luminita Isac
Nanomaterials 2021, 11(1), 200; https://0-doi-org.brum.beds.ac.uk/10.3390/nano11010200 - 14 Jan 2021
Cited by 8 | Viewed by 1869
Abstract
The photocatalyst materials correlation with the radiation scenario and pollutant molecules can have a significant influence on the overall photocatalytic efficiency. This work aims to outline the significance of optimizing the components mass ratio into a tandem structure in order to increase the [...] Read more.
The photocatalyst materials correlation with the radiation scenario and pollutant molecules can have a significant influence on the overall photocatalytic efficiency. This work aims to outline the significance of optimizing the components mass ratio into a tandem structure in order to increase the photocatalytic activity toward pollutant removal. ZnO_SnO2 and TiO2_SnO2 tandem structures were obtained by the doctor blade technique using different mass ratios between the components. The samples contain metal oxides with crystalline structures and the morphology is influenced by the main component. The photocatalytic activity was tested using three radiation scenarios (UV, UV-Vis, and Vis) and two pollutant molecules (tartrazine and acetamiprid). The results indicate that the photocatalytic activity of the tandem structures is influenced by the radiation wavelength and pollutant molecule. The TiO2_SnO2 exhibit 90% photocatalytic efficiency under UV radiation in the presence of tartrazine, while ZnO_SnO2 exhibit 73% photocatalytic efficiency in the same experimental conditions. The kinetic evaluation indicate that ZnO_SnO2 (2:1) have a higher reaction rate comparing with TiO2_SnO2 (1:2) under UV radiation in the presence of acetamiprid. Full article
(This article belongs to the Special Issue Semiconductor Nanomaterials: Growth, Properties and Applications)
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11 pages, 3577 KiB  
Article
Synthesis of Novel 1T/2H-MoS2 from MoO3 Nanowires with Enhanced Photocatalytic Performance
by Wan Zhao, Xin Liu, Xiuru Yang, Chunxi Liu, Xiaoxiao Qian, Tao Sun, Wenya Chang, Jingjing Zhang and Zhi Chen
Nanomaterials 2020, 10(6), 1124; https://0-doi-org.brum.beds.ac.uk/10.3390/nano10061124 - 06 Jun 2020
Cited by 32 | Viewed by 4656
Abstract
Metallic 1T-phase MoS2 is a newly emerging and attractive catalyst since it has more available active sites and high carrier mobility in comparison with its widely used counterpart of semiconducting 2H-MoS2. Herein, 1T/2H-MoS2(N) (N: MoO3 nanowires were [...] Read more.
Metallic 1T-phase MoS2 is a newly emerging and attractive catalyst since it has more available active sites and high carrier mobility in comparison with its widely used counterpart of semiconducting 2H-MoS2. Herein, 1T/2H-MoS2(N) (N: MoO3 nanowires were used to prepare 1T/2H-MoS2) was synthesized by using molybdenum trioxide (MoO3) nanowires as the starting material and applied in the photodegradation of antibiotic residue in water. Enhanced photocatalytic performance was observed on the obtained 1T/2H-MoS2(N), which was 2.8 and 1.3 times higher than those on 1T/2H-MoS2(P) (P: commercial MoO3 powder was used to prepare 1T/2H-MoS2) and 2H-MoS2, respectively. The active component responsible for the photodegradation was detected and a reaction mechanism is proposed. Full article
(This article belongs to the Special Issue Semiconductor Nanomaterials: Growth, Properties and Applications)
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13 pages, 3050 KiB  
Article
Surface Modification of Bentonite with Polymer Brushes and Its Application as an Efficient Adsorbent for the Removal of Hazardous Dye Orange I
by Wenjuan Guo, Ahmad Umar, Yankai Du, Luyan Wang and Meishan Pei
Nanomaterials 2020, 10(6), 1112; https://0-doi-org.brum.beds.ac.uk/10.3390/nano10061112 - 04 Jun 2020
Cited by 7 | Viewed by 2418
Abstract
Poly(2-(dimethylamino)ethyl methacrylate)-grafted bentonite, marked as Bent-PDMAEMA, was designed and prepared by a surface-initiated atom transfer radical polymerization method for the first time in this study. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA) were [...] Read more.
Poly(2-(dimethylamino)ethyl methacrylate)-grafted bentonite, marked as Bent-PDMAEMA, was designed and prepared by a surface-initiated atom transfer radical polymerization method for the first time in this study. Fourier transform infrared spectroscopy (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM) and thermal gravimetric analysis (TGA) were applied to characterize the structure of Bent-PDMAEMA, which resulted in the successful synthesis of Bent-PDMAEMA. As a cationic adsorbent, the designed Bent-PDMAEMA was used to remove dye Orange I from wastewater. The adsorption property of Bent-PDMAEMA for Orange I dye was investigated under different experimental conditions, such as solution pH, initial dye concentration, contact time and temperature. Under the optimum conditions, the adsorption amount of Bent-PDMAEMA for Orange I dye could reach 700 mg·g−1, indicating the potential application of Bent-PDMAEMA for anionic dyes in the treatment of wastewater. Moreover, the experimental data fitted well with the Langmuir model. The adsorption process obeyed pseudo-second-order kinetic process mechanism. Full article
(This article belongs to the Special Issue Semiconductor Nanomaterials: Growth, Properties and Applications)
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19 pages, 4679 KiB  
Article
Bi2WO6/C-Dots/TiO2: A Novel Z-Scheme Photocatalyst for the Degradation of Fluoroquinolone Levofloxacin from Aqueous Medium
by Shelja Sharma, Alex O. Ibhadon, M. Grazia Francesconi, Surinder Kumar Mehta, Sasikumar Elumalai, Sushil Kumar Kansal, Ahmad Umar and Sotirios Baskoutas
Nanomaterials 2020, 10(5), 910; https://0-doi-org.brum.beds.ac.uk/10.3390/nano10050910 - 08 May 2020
Cited by 78 | Viewed by 5412
Abstract
Photocatalytic materials and semiconductors of appropriate structural and morphological architectures as well as energy band gaps are materials needed for mitigating current environmental problems, as these materials have the ability to exploit the full spectrum of solar light in several applications. Thus, constructing [...] Read more.
Photocatalytic materials and semiconductors of appropriate structural and morphological architectures as well as energy band gaps are materials needed for mitigating current environmental problems, as these materials have the ability to exploit the full spectrum of solar light in several applications. Thus, constructing a Z-scheme heterojunction is an ideal approach to overcoming the limitations of a single component or traditional heterogeneous catalysts for the competent removal of organic chemicals present in wastewater, to mention just one of the areas of application. A Z-scheme catalyst possesses many attributes, including enhanced light-harvesting capacity, strong redox ability and different oxidation and reduction positions. In the present work, a novel ternary Z-scheme photocatalyst, i.e., Bi2WO6/C-dots/TiO2, has been prepared by a facile chemical wet technique. The prepared solar light-driven Z-scheme composite was characterized by many analytical and spectroscopic practices, including powder X-ray diffraction (XRD), field emission scanning electron microscopy (FE-SEM), N2 adsorption–desorption isotherm, Fourier-transform infrared spectroscopy (FT-IR), photoluminescence (PL) and UV-vis diffuse reflectance spectroscopy (DRS). The photocatalytic activity of the Bi2WO6/C-dots/TiO2 composite was evaluated by studying the degradation of fluoroquinolone drug, levofloxacin under solar light irradiation. Almost complete (99%) decomposition of the levofloxacin drug was observed in 90 min of sunlight irradiation. The effect of catalyst loading, initial substrate concentration and pH of the reaction was also optimized. The photocatalytic activity of the prepared catalyst was also compared with that of bare Bi2WO6, TiO2 and TiO2/C-dots under optimized conditions. Scavenger radical trap studies and terephthalic acid (TPA) fluorescence technique were done to understand the role of the photo-induced active radical ions that witnessed the decomposition of levofloxacin. Based on these studies, the plausible degradation trail of levofloxacin was proposed and was further supported by LC-MS analysis. Full article
(This article belongs to the Special Issue Semiconductor Nanomaterials: Growth, Properties and Applications)
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