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Nanomaterials
Special Issues
Nanomaterials for Environment Energy Harvesting, Conversion and Application
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Special Issue "Nanomaterials for Environment Energy Harvesting, Conversion and Application"

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

Deadline for manuscript submissions: 30 December 2023 | Viewed by 2118

Special Issue Editor

Prof. Dr. Yanmin Jia

E-Mail Website1 Website2
Guest Editor
School of Science, Xi’an University of Posts and Telecommunications, Xi’an 710121, China
Interests: piezocatalysis; mechanocatalysis; pyrocatalysis; photocatalysis; energy harvesting
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

Through energy harvesting, useful energy is captured from waste, environmental, or mechanical sources and is converted into a usable form. Mechanical energy, magnetic energy, light, heat and electricity are the main types of essential energy that can be harvested for application in many fields, including environmental, medical, energy, and catalysis (e.g., to drive various kinds of chemical reactions). Nanomaterials, with high specific surface area due to their small particle size (<100 nm), provide new ways to catch, store and exchange energy, and provide an extensive range of resources to resolve future energy-related problems. Nanomaterial energy harvesting and conversion is a broad topic that includes established methods such as photovoltaics, piezoelectricity, triboelectricity, and thermoelectrics, as well as more recent technologies that convert mechanical energy, magnetic energy (magnetoelectricity) and cold–hot alternation waste heat (pyroelectricity) to electricity, even directly to chemical energy. In view of the low energy harvesting cost and high conversion efficiency, nanomaterials have potential in environmental, medical or energy applications in future.

This Special Issue will present comprehensive research outlining progress on environmental energy harvesting (including light, thermal, electric, magnetic and mechanical energy, etc.), conversion to electrical energy or chemical energy, and application in environmental, energy or medical fields of nanomaterials or nanostructures. We invite authors to contribute original research and review articles covering the current progress on nanomaterial energy harvesting, conversion and application.

Potential topics in both theoretical analysis and experimental research include, but are not limited to:

  1. Ferro/piezo/pyroelectric nanomaterials for piezocatalysis and pyrocatalysis;
  2. Mechano-chemical synthesis of nanoparticles;
  3. Nanomaterials with photoelectric energy conversion for photocatalysis or photovoltaics;
  4. Magnetic nanoparticles for energy harvesting and conversion;
  5. Nanoscale pyroelectric energy harvesting;
  6. Nanoscale piezoelectric energy harvesting;
  7. Nano friction generators or tribocatalysis;
  8. Nanomaterials for magnetocatalysis or magnetoelectrocatalysis;
  9. Nanoparticles for environmental, medical or energy application;
  10. Nanomaterials for energy harvesting and conversion.

We look forward to receiving your contributions.

Prof. Dr. Yanmin Jia
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

  • mechano-chemical synthesis of nanoparticles
  • photocatalysis
  • pyrocatalysis
  • piezocatalysis
  • tribocatalysis
  • magnetocatalysis
  • ferro/pyroelectric nanomaterials
  • nanoparticles for environmental application
  • nanomaterials for medical application
  • nanomaterials for energy harvesting and conversion

Published Papers (3 papers)

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Research

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13 pages, 4348 KiB  
Article
Enhanced Catalytic Performance of Ag NP/0.95AgNbO3-0.05LiTaO3 Heterojunction from the Combination of Surface Plasma Resonance Effect and Piezoelectric Effect Using Facile Mechanical Milling
by
Tianxiang Ren
,
Tufeng He
,
Zhenzhu Cao
,
Pengyue Xing
,
Xinglong Teng
and
Guorong Li
Nanomaterials 2023, 13(22), 2972; https://doi.org/10.3390/nano13222972 - 18 Nov 2023
Viewed by 509
Abstract
An internal built electric field can suppress the recombination of electron–hole pairs and distinctly enhance the catalytic activity of a photocatalyst. Novel t-Ag/0.95AgNbO3-0.05LiTaO3 heterojunction was prepared by reducing silver nanoparticles (Ag NPs) on the surface of the piezoelectric powder 0.95AgNbO [...] Read more.
An internal built electric field can suppress the recombination of electron–hole pairs and distinctly enhance the catalytic activity of a photocatalyst. Novel t-Ag/0.95AgNbO3-0.05LiTaO3 heterojunction was prepared by reducing silver nanoparticles (Ag NPs) on the surface of the piezoelectric powder 0.95AgNbO3-0.05LiTaO3 (0.05-ANLT) using a simple mechanical milling method. The effects of milling time and excitation source used for the degradation of organic dye by heterojunction catalysts were investigated. The results demonstrate that the optimized 1.5-Ag/0.05-ANLT heterojunction removes 97% RhB within 40 min, which is 7.8 times higher than that of single piezoelectric catalysis and 25.4 times higher than that of single photocatalysis. The significant enhancement of photocatalytic activity can be attributed to the synergistic coupling of the surface plasmon resonance (SPR) effect and the piezoelectric effect. Full article
(This article belongs to the Special Issue Nanomaterials for Environment Energy Harvesting, Conversion and Application)
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14 pages, 5699 KiB  
Article
Free Convection in a Square Ternary Hybrid Nanoliquid Chamber with Linearly Heating Adjacent Walls
by
Vemula Rajesh
and
Mikhail Sheremet
Nanomaterials 2023, 13(21), 2860; https://doi.org/10.3390/nano13212860 - 28 Oct 2023
Viewed by 504
Abstract
In this study, mathematical modeling of the energy transfer and flow characteristics of ternary nanoliquid in a square enclosure is performed. In the cavity considered, the left and bottom borders are warmed uniformly or non-uniformly when the rest of the borders are cooled. [...] Read more.
In this study, mathematical modeling of the energy transfer and flow characteristics of ternary nanoliquid in a square enclosure is performed. In the cavity considered, the left and bottom borders are warmed uniformly or non-uniformly when the rest of the borders are cooled. The robust finite element method with quads and triangles as elements is used to work out the control equations of the problem. The current study is validated against previously published works, and good agreement is shown. The isolines are investigated for various Rayleigh numbers at uniform and non-uniform thermal boundary conditions. The impact of ternary hybrid nanofluids on the mean Nusselt number at hot borders is explored in dependence on the Rayleigh number and nanoparticle concentration. A comparative study of different fluids for the mean Nusselt number at heated borders is also conducted and analyzed with appropriate graphs and tables. It has been shown that ternary nanofluids can be more effective compared to mono- and hybrid nanofluids, with a more essential growth of the energy transport rate with nanoadditives concentration. Full article
(This article belongs to the Special Issue Nanomaterials for Environment Energy Harvesting, Conversion and Application)
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Review

Jump to: Research

30 pages, 5989 KiB  
Review
Surface Oxygen Species in Metal Oxide Photoanodes for Solar Energy Conversion
by
Jie Ouyang
,
Qi-Chao Lu
,
Sheng Shen
and
Shuang-Feng Yin
Nanomaterials 2023, 13(13), 1919; https://doi.org/10.3390/nano13131919 - 23 Jun 2023
Cited by 1 | Viewed by 886
Abstract
Converting and storing solar energy directly as chemical energy through photoelectrochemical devices are promising strategies to replace fossil fuels. Metal oxides are commonly used as photoanode materials, but they still encounter challenges such as limited light absorption, inefficient charge separation, sluggish surface reactions, [...] Read more.
Converting and storing solar energy directly as chemical energy through photoelectrochemical devices are promising strategies to replace fossil fuels. Metal oxides are commonly used as photoanode materials, but they still encounter challenges such as limited light absorption, inefficient charge separation, sluggish surface reactions, and insufficient stability. The regulation of surface oxygen species on metal oxide photoanodes has emerged as a critical strategy to modulate molecular and charge dynamics at the reaction interface. However, the precise role of surface oxygen species in metal oxide photoanodes remains ambiguous. The review focuses on elucidating the formation and regulation mechanisms of various surface oxygen species in metal oxides, their advantages and disadvantages in photoelectrochemical reactions, and the characterization methods employed to investigate them. Additionally, the article discusses emerging opportunities and potential hurdles in the regulation of surface oxygen species. By shedding light on the significance of surface oxygen species, this review aims to advance our understanding of their impact on metal oxide photoanodes, paving the way for the design of more efficient and stable photoelectrochemical devices. Full article
(This article belongs to the Special Issue Nanomaterials for Environment Energy Harvesting, Conversion and Application)
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