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Nanomaterials
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Nanoscale Material Catalysis for Environmental Protection
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Nanoscale Material Catalysis for Environmental Protection

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Environmental Nanoscience and Nanotechnology".

Deadline for manuscript submissions: 23 May 2025 | Viewed by 5065

Special Issue Editor

Dr. Wenjie Li

E-Mail Website
Guest Editor
School of Ecology and Environment, Zhengzhou University, No.100 Science Avenue, High-Tech District, Zhengzhou 450001, China
Interests: environmental catalysis; air pollutant removal; environment function material; carbon dioxide conversion

Special Issue Information

Dear Colleagues,

Nanoscale material catalysis is actively studied in the field of environmental protection. It has great potential and unique superiority in various aspects such as air pollutant elimination, wastewater purification, soil remediation, waste disposal, and CO2 conversion. The issues of how to synthesize efficient and highly selective catalysts and reveal the reaction/ inactivation are important topics in this field.

This Special Issue aims to report the latest innovative research and development in nanoscale material catalysis for the environmental protection field, covering a broad range of topics, including the design, synthesis, and application of nanoscale catalysts for pollutant removal or conversion in air, water, and soil. Revealing the related reaction/deactivation mechanism using various experimental and theoretical calculation means is also encouraged. We welcome contributions from all related groups that contribute to our understanding of this exciting and rapidly advancing field.

In this Special Issue, original research articles and reviews are welcome. Research areas may include (but are not limited to) the following:

  • Nanoscale catalyst synthesis, characterization for environmental applications.
  • Catalytic mechanisms and strategies for catalyst activation and regeneration.
  • Catalytic strategies aimed at abating environmental pollutants, including air pollutants (such as nitrogen oxides and volatile organic compounds), water pollutants, and soil pollutants.
  • Catalytic reactions that adeptly transform CO2 into valuable and useful products.

We look forward to receiving your contributions.

Dr. Wenjie Li
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. 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 2400 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

  • nanoscale materials
  • environmental catalysis
  • pollution control
  • gas purification
  • water treatment
  • carbon dioxide catalytic conversion
  • electrocatalysis
  • photocatalysis
  • catalytic mechanism
  • air pollutants

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Further information on MDPI's Special Issue policies can be found here.

Published Papers (4 papers)

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Research

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17 pages, 16706 KiB  
Article
Effects of Cu Substituting Mo in Sr2Fe1.5Mo0.5O6−δ Symmetrical Electrodes for CO2 Electrolysis in Solid Oxide Electrolysis Cells
by Wanting Tan, Pengzhan Hu, Tianxiang Feng, Siliang Zhao, Shuai Wang, Hui Song, Zhaoyu Qi and Wenjie Li
Nanomaterials 2025, 15(8), 585; https://doi.org/10.3390/nano15080585 - 11 Apr 2025
Viewed by 293
Abstract
Solid oxide electrolysis cells (SOECs) are considered one of the most promising technologies for carbon neutralization, as they can efficiently convert CO2 into CO fuel. Sr2Fe1.5Mo0.5O6−δ (SFM) double perovskite is a potential cathode material, but [...] Read more.
Solid oxide electrolysis cells (SOECs) are considered one of the most promising technologies for carbon neutralization, as they can efficiently convert CO2 into CO fuel. Sr2Fe1.5Mo0.5O6−δ (SFM) double perovskite is a potential cathode material, but its catalytic activity for CO2 reduction needs further improvement. In this study, Cu ions were introduced to partially replace Mo ions in SFM to adjust the electrochemical performance of the cathode, and the role of the Cu atom was revealed. The results show Cu substitution induced lattice expansion and restrained impurity in the electrode. The particle size of the Sr2Fe1.5Mo0.4Cu0.1O6−δ (SFMC0.1) electrode was about 500 nm, and the crystallite size obtained from the Williamson–Hall plot was 75 nm. Moreover, Cu doping increased the concentration of oxygen vacancies, creating abundant electrochemical active sites, and led to a reduction in the oxidation states of Fe and Mo ions. Compared with other electrodes, the SFMC0.1 electrode exhibited the highest current density and the lowest polarization resistance. The current density of SFMC0.1 reached 202.20 mA cm−2 at 800 °C and 1.8 V, which was 12.8% and 102.8% higher than the SFM electrodes with and without an isolation layer, respectively. Electrochemical impedance spectroscopy (EIS) analysis demonstrated that Cu doping not only promoted CO2 adsorption, dissociation and diffusion processes, but improved the charge transfer and oxygen ion migration. Theory calculations confirm that Cu doping lowered the surface and lattice oxygen vacancy formation energy of the material, thereby providing more CO2 active sites and facilitating oxygen ion transfer. Full article
(This article belongs to the Special Issue Nanoscale Material Catalysis for Environmental Protection)
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17 pages, 27979 KiB  
Article
Effect of Chemical Polishing on the Formation of TiO2 Nanotube Arrays Using Ti Mesh as a Raw Material
by Wanshun Li, Shiqiu Zhang and Fei Li
Nanomaterials 2024, 14(23), 1893; https://doi.org/10.3390/nano14231893 - 26 Nov 2024
Cited by 1 | Viewed by 898
Abstract
As a unique form of TiO2, TiO2 nanotube arrays (TiO2NTAs) have been widely used. TiO2NTAs are usually prepared by Ti foil, with little research reporting its preparation by Ti mesh. In this paper, TiO2NTAs [...] Read more.
As a unique form of TiO2, TiO2 nanotube arrays (TiO2NTAs) have been widely used. TiO2NTAs are usually prepared by Ti foil, with little research reporting its preparation by Ti mesh. In this paper, TiO2NTAs are prepared on a Ti mesh surface via an anodic oxidation method in the F-containing electrolyte. The optimal parameters for the synthesis of TiO2NTAs are as follows: the solvent is ethylene glycol and water; the electrolyte is NH4F (0.175 mol/L); the voltage is 20 V; and the anodic oxidation time is 40 min without chemical polishing. However, there is a strange phenomenon where the nanotube arrays grow only at the intersection of Ti wires, which may be caused by chemical polishing, and the other areas, where TiO2NTAs cannot be observed on the surface of Ti mesh, are covered by a dense TiO2 film. New impurities (the hydrate of TiO2 or other products) introduced by chemical polishing and attaching to the surface of the Ti mesh reduce the current of anodic oxidation and further inhibit the growth of TiO2 nanotubes. Hence, under laboratory conditions, for commercially well-preserved Ti mesh, there is no necessity for chemical polishing. The formation of TiO2NTAs includes growth and crystallization processes. For the growth process, F− ions corrode the dense TiO2 film on the surface of Ti mesh to form soluble complexes ([TiF6]2−), and the tiny pores remain on the surface of Ti mesh. Given the basic photoelectrochemical measurements, TiO2NTAs without chemical polishing have better properties. Full article
(This article belongs to the Special Issue Nanoscale Material Catalysis for Environmental Protection)
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14 pages, 9321 KiB  
Article
One-Pot Synthesis of Cellulose-Based Carbon Aerogel Loaded with TiO2 and g-C3N4 and Its Photocatalytic Degradation of Rhodamine B
by Fangqin Liu, Mingjie Fan, Xia Liu and Jinyang Chen
Nanomaterials 2024, 14(13), 1141; https://doi.org/10.3390/nano14131141 - 2 Jul 2024
Cited by 2 | Viewed by 1804
Abstract
A cellulose-based carbon aerogel (CTN) loaded with titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) was prepared using sol–gel, freeze-drying, and high-temperature carbonization methods. The formation of the sol–gel was carried out through a one-pot method using [...] Read more.
A cellulose-based carbon aerogel (CTN) loaded with titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) was prepared using sol–gel, freeze-drying, and high-temperature carbonization methods. The formation of the sol–gel was carried out through a one-pot method using refining papermaking pulp, tetrabutyl titanate, and urea as raw materials and hectorite as a cross-linking and reinforcing agent. Due to the cross-linking ability of hectorite, the carbonized aerogel maintained a porous structure and had a large specific surface area with low density (0.0209 g/cm3). The analysis of XRD, XPS, and Raman spectra revealed that the titanium dioxide (TiO2) and graphitic carbon nitride (g-C3N4) were uniformly distributed in the CTN, while TEM and SEM observations demonstrated the uniformly distributed three-dimensional porous structure of CTN. The photocatalytic activity of the CTN was determined according to its ability to degrade rhodamine B. The removal rate reached 89% under visible light after 120 min. In addition, the CTN was still stable after five reuse cycles. The proposed catalyst exhibits excellent photocatalytic performance under visible light conditions. Full article
(This article belongs to the Special Issue Nanoscale Material Catalysis for Environmental Protection)
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Review

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26 pages, 3516 KiB  
Review
Recent Progress in Bismuth Vanadate-Based Photocatalysts for Photodegradation Applications
by Yangyang Zhang, Hao Li and Dan Yin
Nanomaterials 2025, 15(5), 331; https://doi.org/10.3390/nano15050331 - 21 Feb 2025
Viewed by 733
Abstract
Bismuth vanadate (BiVO4), a well-known semiconductor photocatalyst with various advantages, has shown great potential in addressing energy and environmental issues. However, its inherent drawbacks restrict the photocatalytic performance of pure BiVO4. In the past few years, many efforts have [...] Read more.
Bismuth vanadate (BiVO4), a well-known semiconductor photocatalyst with various advantages, has shown great potential in addressing energy and environmental issues. However, its inherent drawbacks restrict the photocatalytic performance of pure BiVO4. In the past few years, many efforts have been devoted to improving the catalytic activity of BiVO4 and revealing the degradation mechanism in depth. In this review, we summarized the recent progress on BiVO4 in the field of photocatalytic degradation, including the strategies which enhance light absorption ability and suppress the recombination of charge carriers of BiVO4, as well as the related degradation mechanism. Finally, future prospects and challenges are summarized, which may provide new guidelines for designing more effective BiVO4-based photocatalysts for the degradation of persistent organic pollutants. Full article
(This article belongs to the Special Issue Nanoscale Material Catalysis for Environmental Protection)
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