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Nanomaterials
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Catalysis of Porous Nanomaterials
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Catalysis of Porous Nanomaterials

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

Deadline for manuscript submissions: closed (30 June 2023) | Viewed by 4809

Special Issue Editor

Prof. Dr. Jianyong Zhang

E-Mail Website
Guest Editor
School of Materials Science and Engineering, Sun Yat-sen University, Guangzhou 510275, China
Interests: porous materials; catalysis; gels
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

This Special Issue aims to provide a comprehensive overview of the Catalysis of Porous Nanomaterials. Porous materials, including inorganic, hybrid organic–inorganic and organic porous materials, have attracted a great deal of attention, and many researchers are participating in this field. Porous materials have proven competitive in catalysis. Porous-materials-based heterogeneous catalysts show outstanding performance and reusability.

The scope of this Special Issue can be expanded from the synthesis and design of porous nanomaterials to their properties and application in catalysis. Synthesis, characterization techniques, and catalytic applications for these porous nanomaterials will be covered, and novel insights can be proposed. This Special Issue will consolidate our understanding in porous materials and catalysis.

Potential topics include, but are not limited to, the following research areas:

  • Metal oxides, zeolites, metal-organic frameworks (MOFs), porous organic polymers (POPs) and covalent-organic frameworks (COFs).
  • Nanoparticles and porous materials.
  • Porous-materials-derived materials.
  • Catalysis of porous materials.
  • Single-atom catalysis and porous materials.
  • Photocatalysis of porous materials.
  • Electrocatalysis of porous materials.

It is our pleasure to invite you to submit manuscripts on the subject “Catalysis of Porous Nanomaterials” for this Special Issue. Communications, full papers, and reviews are all welcome. We look forward to your contributions.

Prof. Dr. Jianyong Zhang
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 2900 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

  • porous materials
  • nanoparticles
  • supported catalysis
  • heterogeneous catalysis
  • metal oxides
  • zeolites
  • metal-organic frameworks
  • porous organic polymers
  • covalent-organic frameworks

Published Papers (4 papers)

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Research

19 pages, 7592 KiB  
Article
Scalable Synthesis of Oxygen Vacancy-Rich Unsupported Iron Oxide for Efficient Thermocatalytic Conversion of Methane to Hydrogen and Carbon Nanomaterials
by Abdulrahman I. Alharthi, Talal F. Qahtan, Maged N. Shaddad, Mshari A. Alotaibi, Satam Alotibi and Amani M. Alansi
Nanomaterials 2023, 13(17), 2461; https://doi.org/10.3390/nano13172461 - 31 Aug 2023
Cited by 2 | Viewed by 1120
Abstract
Thermocatalytic methane decomposition (TCMD) involving metal oxides is a more environmentally friendly and cost-effective strategy for scalable hydrogen fuel production compared to traditional methane steam reforming (MSR), as it requires less energy and produces fewer CO/CO2 emissions. However, the unsupported metal oxide [...] Read more.
Thermocatalytic methane decomposition (TCMD) involving metal oxides is a more environmentally friendly and cost-effective strategy for scalable hydrogen fuel production compared to traditional methane steam reforming (MSR), as it requires less energy and produces fewer CO/CO2 emissions. However, the unsupported metal oxide catalysts (such as α-Fe2O3) that would be suited for this purpose exhibit poor performance in TCMD. To overcome this issue, a novel strategy was developed as a part of this work, whereby oxygen vacancies (OVs) were introduced into unsupported α-Fe2O3 nanoparticles (NPs). Systematic characterization of the obtained materials through analytical techniques demonstrated that mesoporous nanostructured unsupported α-Fe2O3 with abundant oxygen vacancies (OV-rich α-Fe2O3 NPs) could be obtained by direct thermal decomposition of ferric nitrate at different calcination temperatures (500, 700, 900, and 1100 °C) under ambient conditions. The thermocatalytic activity of the resulting OV-rich α-Fe2O3 NPs was assessed by evaluating the methane conversion, hydrogen formation rate, and amount of carbon deposited. The TCMD results revealed that 900 °C was the most optimal calcination temperature, as it led to the highest methane conversion (22.5%) and hydrogen formation rate (47.0 × 10−5 mol H2 g−1 min−1) after 480 min. This outstanding thermocatalytic performance of OV-rich α-Fe2O3 NPs is attributed to the presence of abundant OVs on their surfaces, thus providing effective active sites for methane decomposition. Moreover, the proposed strategy can be cost-effectively scaled up for industrial applications, whereby unsupported metal oxide NPs can be employed for energy-efficient thermocatalytic CH4 decomposition into hydrogen fuel and carbon nanomaterials. Full article
(This article belongs to the Special Issue Catalysis of Porous Nanomaterials)
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16 pages, 5605 KiB  
Article
Vapour-Phase Selective Hydrogenation of γ-Valerolactone to 2-Methyltetrahydrofuran Biofuel over Silica-Supported Copper Catalysts
by Ramyakrishna Pothu, Prathap Challa, Rajendiran Rajesh, Rajender Boddula, Ravi Balaga, Putrakumar Balla, Vijayanand Perugopu, Ahmed Bahgat Radwan, Aboubakr M. Abdullah and Noora Al-Qahtani
Nanomaterials 2022, 12(19), 3414; https://doi.org/10.3390/nano12193414 - 29 Sep 2022
Cited by 15 | Viewed by 1584
Abstract
2-Methyltetrahydrofuran (MTHF) is a desirable biomass-based platform chemical with excellent potential as an ideal biofuel, green solvent, and raw material for synthesizing downstream chemicals. In this work, a series of copper nanoparticles encapsulated on SiO2 were prepared by the wet impregnation method [...] Read more.
2-Methyltetrahydrofuran (MTHF) is a desirable biomass-based platform chemical with excellent potential as an ideal biofuel, green solvent, and raw material for synthesizing downstream chemicals. In this work, a series of copper nanoparticles encapsulated on SiO2 were prepared by the wet impregnation method and evaluated as efficient non-noble metal catalysts for the vapour-phase hydrogenation of γ-valerolactone (GVL) to MTHF in a fixed-bed reactor under mild reaction conditions. The obtained catalyst properties were determined by XRD, FE-SEM, TEM, UV-DRS, TPR, NH3-TPD, N2O decomposition and pore size distribution measurements. Meanwhile, the parameters/variables tuning their catalytic performance (activity, conversion, selectivity and stability) were examined. Various Cu loadings featured on the SiO2 support are essential for tuning the catalytic activity. Among the catalysts tested, a 5 wt% Cu/SiO2 catalyst showed a 97.2% MTHF selectivity with 71.9% GVL conversion, and showed a stability for 33 h time-on-stream, achieved at 260 °C and atmospheric pressure conditions. It was found that a huge dispersion of Cu metal in support, hydrogen activation ability, abundant acidic sites and surface area are all beneficial for improved MTHF selectivity. Full article
(This article belongs to the Special Issue Catalysis of Porous Nanomaterials)
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9 pages, 2894 KiB  
Article
Synthesis of Two Porous CdS Rods by Anion Exchange Method and Their Photocatalytic Properties
by Liwei Wang, Ming Meng, Ruirui Zheng, Xiaoli Li and Honglei Yuan
Nanomaterials 2022, 12(18), 3190; https://doi.org/10.3390/nano12183190 - 14 Sep 2022
Cited by 2 | Viewed by 1079
Abstract
Semiconductor materials with pore structure have excellent physicochemical properties for photocatalytic reactions. Here, the one-step vulcanization of Cd-based MOF solid rods was successfully developed to synthesize two kinds of CdS rods with pore structure: hollow rods (HRs) and mesoporous rods (MRs). Among the [...] Read more.
Semiconductor materials with pore structure have excellent physicochemical properties for photocatalytic reactions. Here, the one-step vulcanization of Cd-based MOF solid rods was successfully developed to synthesize two kinds of CdS rods with pore structure: hollow rods (HRs) and mesoporous rods (MRs). Among the three catalysts, the CdS HRs showed the highest photocatalytic efficiency, which could remove about 96.0% of RhB in 30 min under visible light irradiation. The enhanced photocatalytic activity of CdS HRs benefits from its novel hollow structure, which enhances the visible light absorption capability and the separation efficiency of photogenerated electron–hole pairs. The successful synthesis of CdS HRs has guiding significance for the design and synthesis of other hollow structures with high photocatalytic activity. Full article
(This article belongs to the Special Issue Catalysis of Porous Nanomaterials)
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18 pages, 4155 KiB  
Article
Nitrogen-Rich Porous Organic Polymers with Supported Ag Nanoparticles for Efficient CO2 Conversion
by Jinyi Wu, Shasha Ma, Jiawei Cui, Zujin Yang and Jianyong Zhang
Nanomaterials 2022, 12(18), 3088; https://doi.org/10.3390/nano12183088 - 06 Sep 2022
Cited by 5 | Viewed by 2523
Abstract
As CO2 emissions increase and the global climate deteriorates, converting CO2 into valuable chemicals has become a topic of wide concern. The development of multifunctional catalysts for efficient CO2 conversion remains a major challenge. Herein, two porous organic polymers (NPOPs) [...] Read more.
As CO2 emissions increase and the global climate deteriorates, converting CO2 into valuable chemicals has become a topic of wide concern. The development of multifunctional catalysts for efficient CO2 conversion remains a major challenge. Herein, two porous organic polymers (NPOPs) functionalized with covalent triazine and triazole N-heterocycles are synthesized through the copper(I)-catalyzed azide–alkyne cycloaddition (CuAAC) reaction. The NPOPs have an abundant microporous content and high specific surface area, which confer them excellent CO2 affinities with a CO2 adsorption capacity of 84.0 mg g−1 and 63.7 mg g−1, respectively, at 273 K and 0.1 MPa. After wet impregnation and in situ reductions, Ag nanoparticles were supported in the NPOPs to obtain Ag@NPOPs with high dispersion and small particle size. The Ag@NPOPs were applied to high-value conversion reactions of CO2 with propargylic amines and terminal alkynes under mild reaction conditions. The carboxylative cyclization transformation of propargylic amine into 2-oxazolidinone and the carboxylation transformation of terminal alkynes into phenylpropiolic acid had the highest TOF values of 1125.1 and 90.9 h−1, respectively. The Ag@NPOP-1 was recycled and used five times without any significant decrease in catalytic activity, showing excellent catalytic stability and durability. Full article
(This article belongs to the Special Issue Catalysis of Porous Nanomaterials)
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