Role of Surfaces and Interfaces in Physical Properties of Materials

A special issue of Applied Sciences (ISSN 2076-3417). This special issue belongs to the section "Materials Science and Engineering".

Deadline for manuscript submissions: closed (20 January 2024) | Viewed by 948

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Linacre College, Oxford University, Oxford OX1 3JA, UK
Interests: nanomaterials and nanostructures; theory and simulation of nucleation; growth and coarsening; exciton and charge transport
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Special Issue Information

Dear Colleagues,

A broad class of technologically important materials are either polycrystalline or the composites containing various inclusions. The properties of these materials are often determined by those of the interfaces between the crystallites or constituent components. The well-known examples are fibre-reinforced plastics, steel-reinforced concrete, various thermoset composites, low thermal and electrical conductivity polycrystalline materials, etc. An example from biology includes the signal propagation in neurons, which is strongly affected by interaction of the actin network surfaces with the surrounding electrolyte. 

Another class of materials used in numerous applications, is that with relatively large surface-to-volume ratio, such as meso- and nanomaterials. Physical properties of these materials depend on their surface energy. For example, the shift of nanoparticle melting temperature relative to the bulk is determined by the corresponding surface energy, as well as the thermodynamic stability of a nanoparticulate ensemble (Ostwald Ripening).

Understanding of the surface and interface characteristics of materials on various length scales and linking them to functional properties of these materials allows purposeful development of relevant directions in materials science and technology. The topic “Role of Surfaces and Interfaces in Physical Properties of Materials” includes but is not restricted by the studies in the following areas:

  • structure and energetics of surfaces and interfaces, their impact on structure and stability of (nano)materials and (nano)composites
  • electrical and mechanical properties of (nano)composites
  • surface/interface electronic states and conductivity, spatially indirect excitons
  • composites for photovoltaics and optoelectronics, photo- and electrochemistry
  • bio-(nano)composites for medicine, drug delivery

Dr. Victor Burlakov
Guest Editor

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Keywords

  • structure of surfaces/interfaces
  • surface/interface energy
  • electrical and mechanical properties of nanomaterials and (nano)composites
  • surface/interface electronic states and conductivity
  • spatially indirect excitons
  • (nano)composites for photovoltaics and optoelectronics
  • (nano)composites for photo- and electrochemistry, and for catalysis
  • bio-(nano)composites for medicine
  • drug delivery
  • structure stability and phase transformations in nanomaterials and (nano)composites

Published Papers (1 paper)

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Research

16 pages, 3206 KiB  
Article
Commercially Biochar Applied for Tartrazine Removal from Aqueous Solutions
by Maria-Loredana Soran, Mariana Bocșa, Stelian Pintea, Adina Stegarescu, Ildiko Lung and Ocsana Opriş
Appl. Sci. 2024, 14(1), 53; https://doi.org/10.3390/app14010053 - 20 Dec 2023
Viewed by 561
Abstract
Biochar gained attention due to its definite physico-chemical characteristics and because it is a cost-effective and efficient adsorbent. In this paper, commercial biochar was tested for the removal of tartrazine from aqueous solutions. Thus, the optimum experimental conditions were determined for several parameters [...] Read more.
Biochar gained attention due to its definite physico-chemical characteristics and because it is a cost-effective and efficient adsorbent. In this paper, commercial biochar was tested for the removal of tartrazine from aqueous solutions. Thus, the optimum experimental conditions were determined for several parameters (pH, temperature, initial concentration of tartrazine, biochar dose, and contact time). The concentration of tartrazine residues was determined using UV-Vis spectrophotometry. The best experimental results were obtained at 1 mg L−1 concentration of tartrazine, pH 2, 30 °C, 18 min, and 0.9 g L−1 adsorbent dose. The maximum removal efficiency of tartrazine obtained in optimum conditions was 90.18%. The experimental data were analyzed by the isotherm and kinetic models. The isotherm and kinetics of tartrazine removal on biochar follow the Langmuir isotherm and pseudo-second-order kinetics, respectively. According to the Langmuir isotherm model, the biochar showed a maximum adsorption capacity of 3.28 mg g−1. In addition, biochar demonstrated a good reuse potential and therefore can be used for the removal of tartrazine from aqueous solutions. Full article
(This article belongs to the Special Issue Role of Surfaces and Interfaces in Physical Properties of Materials)
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