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Journals
Catalysts
Special Issues
Catalytic Materials for Application in Water Purification
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Catalytic Materials for Application in Water Purification

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

Deadline for manuscript submissions: closed (31 December 2021) | Viewed by 5682

Special Issue Editors

Prof. Dr. Pedro B. Tavares

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Guest Editor
Departamento de Química, University of Trás-os-Montes and Alto Douro, Vila Real, Portugal
Interests: wastewater treatment; advanced oxidation processes; environmental catalysis; materials surface characterization; LED photocatalysis; oxide ceramics; catalysts; perovskites; thin films; electronic microscopy
Dr. Marco S. Lucas

E-Mail Website
Guest Editor
Vila Real Chemistry Center, University of Trás-os-Montes and Alto Douro, UTAD, Quinta de Prados, 5000-801 Vila Real, Portugal
Interests: advanced oxidation processes; biological treatments; environmental chemistry; emerging chemical contaminants; inactivation of pathogens; water reuse and circular economy
Special Issues, Collections and Topics in MDPI journals
Prof. Dr. Joaquim L. Faria

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Guest Editor
Laboratory of Separation and Reaction Engineering – Laboratory of Catalysis and Materials (LSRE-LCM), Faculdade de Engenharia, Universidade do Porto, Rua Dr. Roberto Frias, 4200-465 Porto, Portugal
Interests: catalysis and photocatalysis; chemical emergent systems for environment, energy, and fine chemistry; physical-organic chemistry; chemistry and materials science; spectroscopic techniques; advanced oxidation processes; solar fuels; nanotechnology and nanoscience; biophysics and biochemistry; chemical education and science communication; chemical engineering
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Water is an essential compound for all forms of life. Its quality is critical for the future of humankind. Many water sources are close to exhaustion, while others are prone to pollution because of intense human or industrial activity. Water purification is an essential process for safe drinking, industrial applications, wastewater treatment, and environmental sustainability. Many of these purification processes involve homogeneous or heterogeneous catalysis, with or without the complementary use of UV light, ozone, chlorine, or other oxidants.

Besides, water purification provides a reduction in the water footprint, as it is possible to recycle and reuse into industrial or municipal processes.

Authors dealing with the successful use of catalysis or photocatalysis in water purification are cordially invited to submit their manuscripts to this Special Issue of Catalysts. Significant full papers and review articles are very welcome. The topics of the Special Issue cover various aspects of catalysis applied to water purification in all of its diversity, including the application of homogeneous or heterogeneous catalysis in water treatment, molecular photocatalysis, disinfection, elimination of emerging contaminants, and advanced oxidation processes. This Special Issue will also cover the signs of progress and new trends in the preparation and characterization of catalytic or photocatalytic materials, with particular emphasis on their applications in environmental remediation for the removal of emerging organic pollutants from different types of water.

Prof. Dr. Pedro B. Tavares
Dr. Marco S. Lucas
Prof. Dr. Joaquim L. Faria
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. Catalysts is an international peer-reviewed open access monthly 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

  • catalysts
  • water purification
  • homogeneous and heterogeneous catalysis
  • pathogenic removal
  • photocatalysis
  • photocatalytic materials
  • kinetics
  • catalytic mechanisms
  • catalytic reactors
  • green chemistry
  • advanced oxidation processes

Published Papers (2 papers)

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16 pages, 4880 KiB  
Article
Evaluation of Efficient and Noble-Metal-Free NiTiO3 Nanofibers Sensitized with Porous gC3N4 Sheets for Photocatalytic Applications
by Haritham Khan, Suhee Kang and Caroline Sunyong Lee
Catalysts 2021, 11(3), 385; https://doi.org/10.3390/catal11030385 - 17 Mar 2021
Cited by 16 | Viewed by 2678
Abstract
One-dimensional nickel titanate nanofibers (NiTiO3 NFs) were synthesized and loaded with acetic acid-treated exfoliated and sintered sheets of graphitic carbon nitride (AAs-gC3N4) to fabricate a unique heterogeneous structure. This novel fabrication method for porous AAs-gC3N4 [...] Read more.
One-dimensional nickel titanate nanofibers (NiTiO3 NFs) were synthesized and loaded with acetic acid-treated exfoliated and sintered sheets of graphitic carbon nitride (AAs-gC3N4) to fabricate a unique heterogeneous structure. This novel fabrication method for porous AAs-gC3N4 sheets using acetic acid-treated exfoliation followed by sintering provided gC3N4 with a surface area manifold larger than that of bulk gC3N4, with an abundance of catalytically active sites. Hybrid photocatalysts were synthesized through a two-step process. Firstly, NiTiO3 NFs (360 nm in diameter) were made by electrospinning, and these NiTiO3 NFs were sensitized with exfoliated gC3N4 sheets via a sonication process. Varying the weight ratio of NiTiO3 fibers to porous AAs-gC3N4 established that NiTiO3 NFs containing 40 wt% of porous AAs-gC3N4 exhibited optimal activity, i.e., removal of methylene blue and H2 evolution. After 60 min exposure to visible light irradiation, 97% of the methylene blue molecules were removed by the hybrid photocatalyst, compared with 82%, 72%, and 76% by pristine AAs-gC3N4, NiTiO3 NFs, and bulk gC3N4, respectively. The optimal structure also displayed excellent H2 evolution performance. The H2 evolution rate in the optimal sample (152 μmol g−1) was 2.2, 3.2 and 3-fold higher than that in pure AAs-gC3N4 (69 μmol g−1), NiTiO3 NFs (47 μmol g−1) and bulk gC3N4 (50 μmol g−1), respectively. This clearly shows that the holey AAs-gC3N4 nanosheets interacted synergistically with the NiTiO3 NFs. This extended the lifetime of photogenerated charge carriers and resulted in superior photocatalytic activity compared with pristine NiTiO3 NFs and bulk gC3N4. The higher Brunauer-Emmett-Teller surface area and the presence of many catalytically active sites also enhanced the photocatalytic performance of the hybrid sample. Moreover, through photoluminescence and photocurrent response analysis, a significant decrease in the recombination losses of the hybrid photocatalysts was also confirmed. Thus, this is a novel strategy to fabricate highly efficient photocatalysts with precisely tunable operating windows and enhanced charge separation. Full article
(This article belongs to the Special Issue Catalytic Materials for Application in Water Purification)
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17 pages, 4492 KiB  
Article
The Photocatalytic Degradation of 2,3,7,8-Tetrachlorodibenzo-p-Dioxin in the Presence of Silver–Titanium Based Catalysts
by Fatin Samara, Thouraya Ghalayini, Nedal Abu Farha and Sofian Kanan
Catalysts 2020, 10(9), 957; https://doi.org/10.3390/catal10090957 - 21 Aug 2020
Cited by 6 | Viewed by 2231
Abstract
Polychlorinated dibenzo-p-dioxins (PCDD) are persistent toxic compounds that are ubiquitous in the environment. The photodegradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the presence of silver titanium oxide (AgTi) and silver titanium doped into the Y-zeolite (AgTiY) was tested using high (254 nm) and mid (302 [...] Read more.
Polychlorinated dibenzo-p-dioxins (PCDD) are persistent toxic compounds that are ubiquitous in the environment. The photodegradation of 2,3,7,8-tetrachlorodibenzo-p-dioxin (TCDD) in the presence of silver titanium oxide (AgTi) and silver titanium doped into the Y-zeolite (AgTiY) was tested using high (254 nm) and mid (302 nm) energy UV irradiation sources. AgTi and AgTiY, both showed success in the photodegradation of 2,3,7,8-TCDD dissolved in methanol/tetrahydrofuran solution. Both catalysts were found to effectively decompose TCDD at 302 nm (lower energy) reaching in between 98–99% degradation after five hours, but AgTiY showed better performance than AgTi at 60 min reaching 91% removal. Byproducts of degradation were evaluated using Gas chromatography/mass spectrometry (GC–MS), resulting in 2,3,7-trichlorodibenzo-p-dioxin, a lower chlorinated congener and less toxic, as the main degradation product. Enzyme Linked Immunosorbent Assay (ELISA) was used to evaluate the relative toxicity of the degradation byproducts were a decrease in optical density indicated that some products of degradation could be potentially more toxic than the parent TCDD. On the other hand, a decrease in toxicity was observed for the samples with the highest 2,3,7,8-TCDD degradation, confirming that AgTiY irradiated at 302 nm is an excellent choice for degrading TCDD. This is the first study to report on the efficiency of silver titanium doped zeolites for the removal of toxic organic contaminants such as dioxins and furans from aquatic ecosystems. Full article
(This article belongs to the Special Issue Catalytic Materials for Application in Water Purification)
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