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Nanomaterials
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Novel Carbon-Based Nanomaterials as Green Catalysts
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Novel Carbon-Based Nanomaterials as Green Catalysts

A special issue of Nanomaterials (ISSN 2079-4991). This special issue belongs to the section "Energy and Catalysis".

Deadline for manuscript submissions: 15 August 2025 | Viewed by 1992

Special Issue Editor

Dr. Qingshan Zhao

E-Mail Website
Guest Editor
State Key Laboratory of Heavy Oil Processing, College of Chemical Engineering, China University of Petroleum (East China), Qingdao 266580, China
Interests: new carbon nanomaterials; green catalysis, energy catalysis
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

With the increase in environmental problems, the development of low-cost, environmentally friendly and efficient green catalysts has become a prevalent research topic. Carbon-based nanomaterials are obtained from a wide range of sources and have excellent physical, chemical and mechanical properties, giving them excellent potential for application in the fields of energy storage and conversion, catalysis, adsorption, and separation.

Compared with traditional catalyst carriers, the pore structure of carbon-based nanomaterials is regular and controllable, and the connecting holes between the pores are small, which significantly improves the catalysts’ lifespan. Carbon-based nanomaterials, such as nitrogen-doped carbon materials, can also be used as nonmetallic catalysts, and their application in oxidation, electrocatalysis, and acetylene hydrochlorination has been widely studied. In addition, they are an abundant resource and can easily be synthesized in an eco-friendly manner, which is in line with the principle of sustainable development.

This Special Issue aims to present research articles and reviews on the most recent developments in the design, synthesis, and characterization of carbon-based nanomaterials, as well as their application as green catalysts.

We look forward to receiving your contributions.

Dr. Qingshan Zhao
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

  • nanomaterials
  • carbon
  • graphene
  • biomass
  • lignin
  • green catalysts
  • nonmetallic catalysts
  • electrocatalysis
  • oxygen reduction reaction
  • sustainable

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Published Papers (2 papers)

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Research

24 pages, 7646 KiB  
Article
A Magnetic Photocatalytic Composite Derived from Waste Rice Noodle and Red Mud
by Qing Liu, Wanying Ying, Hailing Gou, Minghui Li, Ke Huang, Renyuan Xu, Guanzhi Ding, Pengyu Wang and Shuoping Chen
Nanomaterials 2025, 15(1), 51; https://doi.org/10.3390/nano15010051 - 31 Dec 2024
Viewed by 813
Abstract
This study is the first to convert two waste materials, waste rice noodles (WRN) and red mud (RM), into a low-cost, high-value magnetic photocatalytic composite. WRN was processed via a hydrothermal method to produce a solution containing carbon quantum dots (CQDs). Simultaneously, RM [...] Read more.
This study is the first to convert two waste materials, waste rice noodles (WRN) and red mud (RM), into a low-cost, high-value magnetic photocatalytic composite. WRN was processed via a hydrothermal method to produce a solution containing carbon quantum dots (CQDs). Simultaneously, RM was dissolved in acid to form a Fe3+ ion-rich solution, which was subsequently mixed with the CQDs solution and underwent hydrothermal treatment. During this process, the Fe3+ ions in RM were transformed into the maghemite (γ-Fe2O3) phase, while CQDs were incorporated onto the γ-Fe2O3 surface, resulting in the CQDs/γ-Fe2O3 magnetic photocatalytic composite. Experimental results demonstrated that the WRN-derived CQDs not only facilitated the formation of the magnetic γ-Fe2O3 phase but also promoted a synergistic interaction between CQDs and γ-Fe2O3, enhancing electron-hole pair separation and boosting the production of reactive radicals such as O2·− and ·OH. Under optimized conditions (pH = 8, carbon loading: 10 wt%), the CQDs/γ-Fe2O3 composite exhibited good photocatalytic performance against methylene blue, achieving a 97.6% degradation rate within 480 min and a degradation rate constant of 5.99 × 10−3 min−1, significantly outperforming RM and commercial γ-Fe2O3 powder. Beyond methylene blue, this composite also effectively degraded common organic dyes, including malachite green, methyl violet, basic fuchsin, and rhodamine B, with particularly high efficiency against malachite green, reaching a degradation rate constant of 5.465 × 10−2 min−1. Additionally, due to its soft magnetic properties (saturation magnetization intensity: 16.7 emu/g, residual magnetization intensity: 2.2 emu/g), the material could be conveniently recovered and reused after photocatalytic cycles. Even after 10 cycles, it retained over 98% recovery and 96% photocatalytic degradation efficiency, underscoring its potential for cost-effective, large-scale photocatalytic water purification. Full article
(This article belongs to the Special Issue Novel Carbon-Based Nanomaterials as Green Catalysts)
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13 pages, 3074 KiB  
Article
Pd Nanoparticles Immobilized on Pyridinic N-Rich Carbon Nanosheets for Promoting Suzuki Cross-Coupling Reactions
by Shihao Cui, Dejian Xu, Zhiyuan Wang, Libo Wang, Yikun Zhao, Wei Deng, Qingshan Zhao and Mingbo Wu
Nanomaterials 2024, 14(21), 1690; https://doi.org/10.3390/nano14211690 - 22 Oct 2024
Cited by 2 | Viewed by 852
Abstract
Palladium (Pd) catalysts play a crucial role in facilitating Suzuki cross-coupling reactions for the synthesis of valuable organic compounds. However, conventional heterogeneous Pd catalysts often encounter challenges such as leaching and deactivation during reactions, leading to reduced catalytic efficiency. In this study, we [...] Read more.
Palladium (Pd) catalysts play a crucial role in facilitating Suzuki cross-coupling reactions for the synthesis of valuable organic compounds. However, conventional heterogeneous Pd catalysts often encounter challenges such as leaching and deactivation during reactions, leading to reduced catalytic efficiency. In this study, we employed an innovative intercalation templating strategy to prepare two-dimensional carbon nanosheets with high nitrogen doping derived from petroleum asphalt, which were utilized as a versatile support for immobilizing Pd nanoparticles (Pd/N-CNS) in efficient Suzuki cross-coupling reactions. The results indicate that the anchoring effect of high-pyridinic N species on the two-dimensional carbon nanosheets enhances interactions between Pd and the support, effectively improving both the dispersibility and stability of the Pd nanoparticles. Notably, the Pd/N-CNS catalyst achieved an overall turnover frequency (TOF) of 2390 h−1 for the Suzuki cross-coupling reaction under mild conditions, representing approximately a nine-fold increase in activity compared to commercial Pd/C catalysts. Furthermore, this catalyst maintained an overall TOF of 2294 h−1 even after five reaction cycles, demonstrating excellent stability. Theoretical calculations corroborate these observed enhancements in catalytic performance by attributing them to improved electron transfer from Pd to the support facilitated by abundant pyridinic N species. This work provides valuable insights into feasible strategies for developing efficient catalysts aimed at sustainable production of biaromatic compounds. Full article
(This article belongs to the Special Issue Novel Carbon-Based Nanomaterials as Green Catalysts)
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