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Two-Dimensional Materials in Photo(electro)catalysis
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Two-Dimensional Materials in Photo(electro)catalysis

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

Deadline for manuscript submissions: closed (16 December 2024) | Viewed by 8357

Special Issue Editors

Prof. Daimei Chen

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Guest Editor
Engineering Research Center of Ministry of Education for Geological Carbon Storage and Low Carbon Utilization of Resources, China University of Geosciences, Xueyuan Road, Haidian District, Beijing 100083, China
Interests: semiconductor photocatalysis; nanomaterials; environmental-catalysis; environmental chemistry
Prof. Dr. Kangle Lv

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Guest Editor
College of Resources and Environment, South-Central Minzu University, Wuhan 430074, China
Interests: semiconductor photocatalysis; nanomaterials; TiO2; g-C3N4
Special Issues, Collections and Topics in MDPI journals
Dr. Yuhan Li

E-Mail Website
Guest Editor
Engineering Research Center for Waste Oil Recovery Technology and Equipment, Ministry of Education, Chongqing Key Laboratory of Catalysis and New Environmental Materials, Chongqing Technology and Business University, Chongqing 400067, China
Interests: photocatalysis; removal of NOx, VOCs; semiconductor
Dr. Puttaswamy Madhusudan

E-Mail Website
Guest Editor
Department of Civil and Environmental Engineering, Environmental Materials & Membrane Processing Laboratory, 222 Wangsimni-ro, Seongdong-gu, Hanyang University, Seoul 04763, Republic of Korea
Interests: CO2 reduction; photocatalytic hydrogen evolution; photodegradation of organic pollutant; graphene; carbon nitride

Special Issue Information

Dear Colleagues,

In the background of the carbon-neutral energy cycle, catalysis is one of the greenest approaches to solving the energy problem and achieving carbon neutrality. Two-dimensional materials, such as 2D organic framework systems, 2D polymers, and few-layered materials (graphene, graphene-like systems, transition metal dichalcogenides, carbides, nitrides, carbonitrides, silicene, germanene, stanene, and phosphorene), have been regarded as one of most important catalysts and gained significant attention due to their unique properties and versatile applications. Therefore, the design and manipulation of two-dimensional materials at the atomic and molecular scales is very meaningful for improving catalytic processes and developing more efficient energy conversion systems. This Special Issue covers, but is not limited to, the synthesis and applications of two-dimensional materials. Different ex- and in situ techniques for investigating these two-dimensional materials, such as their surface and interface properties, will be included. Many applications based on two-dimensional materials would be expected such as water splitting, hydrogen evolution, carbon dioxide reduction, degradation of organic pollutants, and organic synthesis reactions.

We are looking forward to receiving various research contributions and results in this Special Issue, and we are grateful for your support and contributions. Your active participation and substantive input will be the basis of a successful outcome. We look forward to your submissions.

Herein, we would like to invite you all to contribute with your valuable research to this Special Issue.

Prof. Daimei Chen
Prof. Dr. Kangle Lv
Dr. Yuhan Li
Dr. Puttaswamy Madhusudan
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 2200 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

  • two-dimensional materials
  • catalysis
  • CO2 utilization
  • pollutant abatement
  • hydrogen production
  • co-catalysts
  • heterojunction
  • solar fuels

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Published Papers (6 papers)

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Research

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17 pages, 16550 KiB  
Article
Construction of S-Type PDI/BiOBr Heterojunctions and Their Photocatalytic Activity
by Xin-Qing Wang, Yu Sun, Rui-Hong Liu and Fa-Tang Li
Catalysts 2025, 15(1), 85; https://doi.org/10.3390/catal15010085 - 17 Jan 2025
Viewed by 379
Abstract
Constructing an S-type heterojunction to promote photogenerated carrier separation is a valid method to ameliorate this problem. In this work, self-assembled perylenetetracarboxylic diimide (PDI) was modified on the surface of two-dimensional (2D) BiOBr nanosheets using a continuous ion layer adsorption method. To explore [...] Read more.
Constructing an S-type heterojunction to promote photogenerated carrier separation is a valid method to ameliorate this problem. In this work, self-assembled perylenetetracarboxylic diimide (PDI) was modified on the surface of two-dimensional (2D) BiOBr nanosheets using a continuous ion layer adsorption method. To explore its microstructure, photoelectric properties, and other characteristics, the electron transport channel constructed between self-assembled PDI and BiOBr hinders photogenerated electron-hole recombination. Under visible light irradiation, when the rhodamine B (RhB) was 50 mg/L, the removal rate over 1/3 PDI/BiOBr reached 98% in 60 min, and the rate constant was 15.9 times that over self-assembled PDI and 13 times that over BiOBr. In degrading methyl orange (MO), the removal rate over 1/3 PDI/BiOBr was 65.8% in 60 min, and the rate constant was 5.7 times that over self-assembled PDI and 3.4 times over BiOBr. After the ESR test, O2− is proved to be the main active species in the reaction. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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17 pages, 4252 KiB  
Article
Novel Biochar-Modified ZIF-8 Metal–Organic Frameworks as a Potential Material for Optoelectronic and Electrochemical Energy Storage Applications
by Sarah Al-atawi, Meshari M. Aljohani, Taymour A. Hamdalla, S. A. Al-Ghamdi, Abdulrhman M. Alsharari and Syed Khasim
Catalysts 2024, 14(10), 705; https://doi.org/10.3390/catal14100705 - 10 Oct 2024
Viewed by 1411
Abstract
Herein, we report the preparation of nanocomposites using activated biochar derived from rice husk (RHBC) by doping with a metal–organic framework, namely the zeolitic imidazolate framework (ZIF-8). The morphological and structural characterization of the prepared nanocomposite was performed using SEM, BET, XRD, FTIR, [...] Read more.
Herein, we report the preparation of nanocomposites using activated biochar derived from rice husk (RHBC) by doping with a metal–organic framework, namely the zeolitic imidazolate framework (ZIF-8). The morphological and structural characterization of the prepared nanocomposite was performed using SEM, BET, XRD, FTIR, TGA, and UV–Vis spectroscopy. The average particle sizes as observed from SEM micrographs for ZIF-8 and ZIF-8@RHBC were 67 nm and 78 nm, respectively. The BET surface analysis of the ZIF-8@RHBC composite showed a value of 308 m2/g and a pore diameter of about 42.56 A°. The inclusion of RHBC in ZIF-8 resulted in a 4% increase in the optical band gap and a 5% increase in the optical conductivity. The electrochemical properties of this nanocomposite were investigated through cyclic voltammetry, and it was observed that ZIF-8@RHBC showed improved CV curves in comparison to bare ZIF-8. The specific capacitance of ZIF-8@RHBC was significantly enhanced from 348 F/g to 452 F/g at a 1 A/g current density after incorporating ZIF-8 into the RHBC matrix. The formation of a mesoporous structure in the ZIF-8@RHBC composite contributed to the improved diffusion rate at the electrode surface, resulting in excellent electrochemical features in the composite. Furthermore, the EIS studies confirmed the reduced charge transfer resistance and increased conduction at the electrode surface in the case of the ZIF-8@RHBC composite. Owing to the ease of its green synthesis and its excellent structural and morphological features and optical and electrochemical properties, this ZIF@RHBC nanocomposite could represent a novel multifunctional material to be used in optoelectronics and energy storage applications. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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17 pages, 4066 KiB  
Article
Strong Magnetic p-n Heterojunction Fe3O4-FeWO4 for Photo-Fenton Degradation of Tetracycline Hydrochloride
by Binger Bai, Guanrong Cheng, Jian Chen, Xiaoping Chen and Qizhao Wang
Catalysts 2024, 14(7), 453; https://doi.org/10.3390/catal14070453 - 14 Jul 2024
Viewed by 1166
Abstract
With the abuse of antibiotics, its pollution poses an increasing threat to the environment and human health. Effective degradation of organic pollutants in water bodies is urgent. Compared to traditional treatment methods, advanced oxidation processes that have developed rapidly in recent years are [...] Read more.
With the abuse of antibiotics, its pollution poses an increasing threat to the environment and human health. Effective degradation of organic pollutants in water bodies is urgent. Compared to traditional treatment methods, advanced oxidation processes that have developed rapidly in recent years are more environmentally friendly, efficient and applicable to a wider range of organic compounds. FeWO4 was used in this study as the iron-based semiconductor material to modify and optimize the material design. Fe3O4/FeWO4 composites were prepared by a two-step hydrothermal method. The crystal structure, surface morphology, electrochemical properties and separability of the composite semiconductor were analyzed by XRD, XPS, UV-vis, SEM, EDS and Mott-Schottky. The results showed that, when the initial contaminant concentration was 30 mg/L, the initial solution pH was 4, the dosage of the catalyst was 25 mg and the dosage of hydrogen peroxide was 30 μL, the degradation efficiency of tetracycline hydrochloride (TCH) could reach 91% within 60 min, which was significantly improved compared to the performance of the single semiconductors Fe3O4 and FeWO4. In addition, the catalyst prepared in this experiment can be easily recovered by magnetic separation technology in practical application, which will not affect the turbidity of water while reducing the cost of catalyst separation and recovery. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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13 pages, 4322 KiB  
Article
Plasmonic Bi-Modified Bi2Sn2O7 Nanosheets for Efficient Photocatalytic NO Removal
by Ning Li, Wenwen Zhao, Jiatong Zhang, Xuhui Liu, Yangqin Gao and Lei Ge
Catalysts 2024, 14(4), 275; https://doi.org/10.3390/catal14040275 - 18 Apr 2024
Cited by 3 | Viewed by 1801
Abstract
The photocatalytic removal of nitric oxide (NO) is a promising technology used to reduce the level of harmful gaseous pollutants in parts per billion (ppb). As a potential photocatalyst, Bi2Sn2O7 has a low quantum efficiency due to its [...] Read more.
The photocatalytic removal of nitric oxide (NO) is a promising technology used to reduce the level of harmful gaseous pollutants in parts per billion (ppb). As a potential photocatalyst, Bi2Sn2O7 has a low quantum efficiency due to its fast recombination rate of photo-generated carriers. In this paper, Bi/Bi2Sn2O7 was prepared by the in situ deposition of Bi. The structural, electrical, and optical properties of the attained sample were investigated through a series of analyses. The results demonstrate that Bi nanoparticles not only enhance the photoabsorption ability of Bi2Sn2O7 due to their surface plasmon resonance (SPR) effect, but also improve its photocatalytic activity. Photocatalytic performance was evaluated by the oxidation of NO at ppb level under xenon lamp (λ > 400 nm) irradiation. It was found that the photocatalytic NO removal rate increased from 7.2% (Bi2Sn2O7) to 38.6% (Bi/Bi2Sn2O7). The loading of Bi promotes the separation and migration of photo-generated carriers and enhances the generation of •O2− and •OH radicals responsible for the oxidation of NO. The Bi/Bi2Sn2O7 composite photocatalyst also exhibits excellent photocatalytic stability, which makes it a potential candidate for use in air purification systems. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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19 pages, 2724 KiB  
Article
Natural Wollastonite-Derived Two-Dimensional Nanosheet Ni3Si2O5(OH)4 as a Novel Carrier of CdS for Efficient Photocatalytic H2 Generation
by Jiarong Ma, Run Zhou, Yu Tu, Ruixin Ma, Daimei Chen and Hao Ding
Catalysts 2024, 14(3), 183; https://doi.org/10.3390/catal14030183 - 6 Mar 2024
Cited by 2 | Viewed by 1534
Abstract
Ni3Si2O5(OH)4 rods (NS) were synthesized via a hydrothermal method, employing natural wollastonite as a template. The hierarchical Ni3Si2O5(OH)4 rods exhibited vertically oriented nanosheets, resulting in a substantial increase in [...] Read more.
Ni3Si2O5(OH)4 rods (NS) were synthesized via a hydrothermal method, employing natural wollastonite as a template. The hierarchical Ni3Si2O5(OH)4 rods exhibited vertically oriented nanosheets, resulting in a substantial increase in the specific surface area (from 2.24 m2/g to 178.4 m2/g). Subsequently, a CdS/Ni3Si2O5(OH)4 composite photocatalyst (CdS/NS) was prepared using a chemical deposition method. CdS was uniformly loaded onto the surface of the Ni3Si2O5(OH)4 nanosheets, successfully forming a heterojunction with Ni3Si2O5(OH)4. The CdS/NS photocatalyst in the presence of lactic acid as a sacrificial agent demonstrated an impressive H2 production rate of 4.05 mmol h−1 g−1, around 40 times higher than pure CdS. The photocorrosion of CdS was effectively solved after loading. After four cycles, the performance of CdS/NS remained stable, showing the potential for sustainable applications. After photoexcitation, electrons moved from Ni3Si2O5(OH)4 to the valence band of CdS, where they interacted with the holes via an enhanced interface contact. Simultaneously, electrons in CdS transitioned to its conduction band, facilitating hydrogenation. The enhanced performance was attributed to the improved CdS dispersion by Ni3Si2O5(OH)4 loading and efficient photogenerated carrier separation through the heterojunction formation. This work provides new perspectives for broadening the applications of mineral materials and developing heterojunction photocatalysts with good dispersibility and recyclability. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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Review

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32 pages, 6561 KiB  
Review
Recent Research Progress on Surface Modified Graphite Carbon Nitride Nanocomposites and Their Photocatalytic Applications: An Overview
by Shuhan Li, Juntao Tan, Jiatong Liu, Yang Li, Liang Sun, Zhijie Huang and Jiaming Li
Catalysts 2024, 14(9), 636; https://doi.org/10.3390/catal14090636 - 19 Sep 2024
Cited by 1 | Viewed by 1438
Abstract
Semiconductors with visible light catalytic characteristics can realize the degradation of pollutants, CO2 reduction, and hydrogen preparation in sunlight. They have huge application value in the fields of environmental repair and green energy. Graphite phase nitride (g-C3N4, CN) [...] Read more.
Semiconductors with visible light catalytic characteristics can realize the degradation of pollutants, CO2 reduction, and hydrogen preparation in sunlight. They have huge application value in the fields of environmental repair and green energy. Graphite phase nitride (g-C3N4, CN) is widely used in various fields such as photocatalytic degradation of pollutants due to its suitable gap width, easy preparation, low cost, fast visible light response, and rich surface activity sites. However, the absorption rate of ordinary CN on visible light is low, and the carriers are easy to recombination, making the lower optical catalytic activity. Therefore, in order to improve the photocatalytic characteristics of the CN, it is necessary to make the surface modification. This article first introduces several main methods for the current surface modification of CN, including size regulation, catalyst embedding, defect introduction, heterostructure construction, etc., and then summarizes the optical catalytic application and related mechanisms of CN. Finally, some challenges and development prospects of CN in preparation and photocatalytic applications are proposed. Full article
(This article belongs to the Special Issue Two-Dimensional Materials in Photo(electro)catalysis)
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