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Advances in Nanostructured Photocatalyst for Air Purification and Energy Conversion

A special issue of Molecules (ISSN 1420-3049). This special issue belongs to the section "Photochemistry".

Deadline for manuscript submissions: closed (31 May 2022) | Viewed by 2626

Special Issue Editor


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Guest Editor
Department of Science and Environmental Studies, The Hong Kong Institute of Education, Hong Kong, China
Interests: nano-photocatalytic materials with novel morphology, porous structure, and exposed active sites; identification of catalytic/reaction mechanisms over nanostructured catalysts; roles of composition, morphology, and structure of nano-photocatalytic materials; synthesis and characterization of nano-structural photocatalysts; photocatalytic water splitting; CO2 reduction and removal of environmental pollutants using nano-structural materials; theoretical calculation, simulation, and modeling of nanomaterials
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Special Issue Information

Dear Colleagues,

Since solar energy is infinite, abundant and widely distributed, it is one of the most attractive renewable replacements for fossil fuels. Photocatalysis facilitates the direct transformation of solar energy into chemical energy. In the last few decades, significant progress has been made in the development of different kinds of nanostructured photocatalysts for several applications. Significant knowledge has been reported on the structure–performance relationship in photocatalysts. However, the development of effective nanostructured photocatalysts and their applications remains challenging.

 

This Special Issue “Advances in Nanostructured Photocatalyst for Air Purification and Energy Conversion” covers the design, preparation, and characterization of novel photocatalytic nanomaterials, as well as their applications in air purification and energy conversion. We cordially invite investigators to contribute original research and review articles that will stimulate further research activities in this area and improve our understanding of the key scientific and technological issues in the applications of photocatalytic nanomaterials. We are particularly interested in articles that describe new strategies for synthesis, assembly, and modification of advanced nanomaterials with novel morphologies, porous structures, and exposed active sites, which greatly benefit their performance, providing new insights into the mechanisms of photocatalysis. Full papers, short communications, and review articles presenting and discussing the most recent trends in the field are welcome.

Dr. Wing-Kei Ho
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. Molecules 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 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

  • nano-structural photocatalysts
  • photocatalytic reaction mechanism
  • energy conversion
  • air purification
  • CO2 reduction
  • removal of environmental pollutants
  • water splitting

Published Papers (1 paper)

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Research

18 pages, 6377 KiB  
Article
Assembling Ultrafine SnO2 Nanoparticles on MIL-101(Cr) Octahedrons for Efficient Fuel Photocatalytic Denitrification
by Ruowen Liang, Shihui Wang, Yi Lu, Guiyang Yan, Zhoujun He, Yuzhou Xia, Zhiyu Liang and Ling Wu
Molecules 2021, 26(24), 7566; https://doi.org/10.3390/molecules26247566 - 14 Dec 2021
Cited by 13 | Viewed by 2243
Abstract
Effectively reducing the concentration of nitrogen-containing compounds (NCCs) remains a significant but challenging task in environmental restoration. In this work, a novel step-scheme (S-scheme) SnO2@MCr heterojunction was successfully fabricated via a facile hydrothermal method. At this heterojunction, MIL-101(Cr) octahedrons are decorated [...] Read more.
Effectively reducing the concentration of nitrogen-containing compounds (NCCs) remains a significant but challenging task in environmental restoration. In this work, a novel step-scheme (S-scheme) SnO2@MCr heterojunction was successfully fabricated via a facile hydrothermal method. At this heterojunction, MIL-101(Cr) octahedrons are decorated with highly dispersed SnO2 quantum dots (QDs, approximate size 3 nm). The QDs are evenly wrapped around the MIL-101(Cr), forming an intriguing zero-dimensional/three-dimensional (0D/3D) S-scheme heterostructure. Under simulated sunlight irradiation (280 nm < λ < 980 nm), SnO2@MCr demonstrated superior photoactivity toward the denitrification of pyridine, a typical NCC. The adsorption capacity and adsorption site of SnO2@MCr were also investigated. Tests using 20%SnO2@MCr exhibited much higher activity than that of pure SnO2 and MIL-101(Cr); the reduction ratio of Cr(VI) is rapidly increased to 95% after sunlight irradiation for 4 h. The improvement in the photocatalytic activity is attributed to (i) the high dispersion of SnO2 QDs, (ii) the binding of the rich adsorption sites with pyridine molecules, and (iii) the formation of the S-scheme heterojunction between SnO2 and MIL-101(Cr). Finally, the photocatalytic mechanism of pyridine was elucidated, and the possible intermediate products and degradation pathways were discussed. Full article
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