Semiconductor Photocatalysis and Quantum Dots Photocatalysis

A special issue of Catalysts (ISSN 2073-4344). This special issue belongs to the section "Photocatalysis".

Deadline for manuscript submissions: closed (28 February 2022) | Viewed by 3020

Special Issue Editor


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Guest Editor
School of Mechanical Engineering, Yeungnam University, Gyeongsan 712-749, Korea
Interests: quantum dots; photocatalysis; plasmonic; core@shell; water splitting; supercapacitors
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Photocatalysis is a green technique that has been widely applied in the fields of environmental remediation, particularly to treat water and air pollutants. Different kinds of novel semiconductors have attracted widespread interest for photocatalytic applications due to modifications in various properties and parameters. In recent years, quantum dots (QDs) have demonstrated revolutionary and positive research outcomes to treat environmental pollutants. To date, QDs have attracted significant attention compared to bulk materials due to their exceptional photocatalytic activity resulting from their tiny particle size. Moreover, the surface properties of semiconductor QDs hinder aggregation and improve the photocatalytic activity. QDs are highly favorable for integration with different kinds of other dimensional nanomaterials from 1D to 3D, for the enhancement of photocatalytic performance. Submissions to this Special Issue on “Semiconductor Photocatalysis and Quantum Dots Photocatalysis” are welcome in the form of original research papers or short reviews that reflect state-of-the-art research on this important subject in the following topics: new synthesis methods of QDs, combinations of QDs with other 1D to 3D nanomaterials, and modification and doping of QDs.

Topics covered include, but are not limited to the following:

  • Semiconductor
  • Photocatalysis
  • Quantum dots
  • Dye degradation
  • H2 production
  • CO2 reduction
  • Water splitting
  • Environmental remediation
  • Surface plasmonic resonance
  • Abatement of NOx, VOC’s, SOX

Prof. Dr. Bathula Babu
Guest Editor

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Keywords

  • Semiconductor
  • quantum dots
  • photocatalysis
  • dye degradation
  • H2 production
  • CO2 reduction
  • water splitting
  • environmental remediation
  • surface plasmonic resonance
  • abatement of NOx
  • VOC’s
  • SOX

Published Papers (1 paper)

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Research

14 pages, 3030 KiB  
Article
Facile Synthesis, Characterization, and Photocatalytic Activity of Hydrothermally Grown Cu2+-Doped ZnO–SnS Nanocomposites for MB Dye Degradation
by Govinda Dharmana, Thirumala Rao Gurugubelli, Prabhakara Srinivasa Rao Masabattula, Bathula Babu and Kisoo Yoo
Catalysts 2022, 12(3), 328; https://doi.org/10.3390/catal12030328 - 13 Mar 2022
Cited by 11 | Viewed by 2429
Abstract
The morphology, chemical composition, and doping process of metal oxides and sulfides play a significant role in their photocatalytic performance under solar light illumination. We synthesized Cu2+-doped ZnO–SnS nanocomposites at 220 °C for 10 h, using hydrothermal methods. These nanocomposites were [...] Read more.
The morphology, chemical composition, and doping process of metal oxides and sulfides play a significant role in their photocatalytic performance under solar light illumination. We synthesized Cu2+-doped ZnO–SnS nanocomposites at 220 °C for 10 h, using hydrothermal methods. These nanocomposites were structurally, morphologically, and optically characterized using various techniques, including powder X-ray diffraction (XRD), transmission electron microscopy (TEM), X-ray photoelectron spectroscopy (XPS), and UV-visible absorption spectroscopy. Their photocatalytic activity (PCA) on methylene blue (MB) pollutant dye was examined under 150 W solar light illumination. Mixed-phase abundances with hexagonal ZnO and orthorhombic SnS structures were observed. TEM micrographs showed changes in morphology from spherical to nano-flake structures with an increasing doping concentration. XPS indicated the chemical states of the constituent elements in the nanocomposites. UV-visible absorption spectroscopy showed a decrease in the bandgap with an increasing doping concentration. Strong PCA was observed due to the separation of charge carriers, a change in bandgap, and a high light absorption ability under solar light irradiation. The measured photodegradation efficiency of the MB dye was approximately 97% after 2 h. The movement of the charge carriers and the bandgap alignment of the synthesized composites are briefly discussed. Full article
(This article belongs to the Special Issue Semiconductor Photocatalysis and Quantum Dots Photocatalysis)
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