Search for Articles:
Title / Keyword
Author / Affiliation / Email
Journal
Article Type
 
 
Advanced Search
 
Section
Special Issue
Volume
Issue
Number
Page
 
5.2
3.4
Journals
Materials
Special Issues
Conventional and Microwave Hydrothermal Synthesis of Functional Materials
materials-logo
Submit to Materials Review for Materials Propose a Special Issue

Journal Menu

► Journal Menu

Journal Browser

► Journal Browser
share announcement

Conventional and Microwave Hydrothermal Synthesis of Functional Materials

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Materials Chemistry".

Deadline for manuscript submissions: closed (31 December 2019) | Viewed by 37204

Special Issue Editor

Dr. Gianfranco Dell’Agli

E-Mail Website
Guest Editor
Department of Civil and Mechanical Engineering, University of Cassino and Southern Latium, Via G. Di Biasio 43, 03043 Cassino (FR), Italy
Interests: ceramic electrolytes; rare-earth compounds; entropy stabilized oxides; wet-chemical synthesis; magnetic metal-ceramic nanocomposites
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The term hydrothermal is of geological origin, and it was used almost two centuries ago for the first time to describe the effect of water at elevated temperatures and pression on the Earth’s crust. Later, the hydrothermal technique was used successfully for producing inorganic compounds (quartz, zeolites, etc.) in a commercial way. After a brief period of slight decline in popularity, in the last decades the hydrothermal technology has regained a lot of interest in the scientific community in several application fields, of which the synthesis of advanced materials has played a prominent role. In fact, the hydrothermal treatment has enabled the materials scientists to synthesize fine and ultra-fine particles with a controlled size and morphology, and consequently with desired properties. Consequently, a lot of research works have been published in recent years concerning the hydrothermal synthesis of simple oxides, mixed oxides, perovskites, garnets, vanadates, bioceramics, etc. Then, a further push has arrived through the use of microwaves for enhancing the hydrothermal kinetics.

Therefore, the upcoming Special Issue, entitled “Conventional and Microwave Hydrothermal Synthesis of Functional Materials”, aims to cover an overview of the application of the hydrothermal technology, both conventional and microwave-assisted, in the synthesis of advanced functional materials. To this end, it is my pleasure to invite you to submit a manuscript for this Special Issue. Full papers, communications, and reviews are all welcome.

Prof. Gianfranco Dell'Agli
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. Materials 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 2600 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

  • Hydrothermal treatment
  • Mineralizer solution 
  • Crystallization 
  • Powder morphology 
  • Functional materials 
  • Sintering

Published Papers (7 papers)

Download All Papers
Order results
Result details
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:

Research

Jump to: Review, Other

12 pages, 3985 KiB  
Article
Entropy-Stabilized Oxides owning Fluorite Structure obtained by Hydrothermal Treatment
by Luca Spiridigliozzi, Claudio Ferone, Raffaele Cioffi, Grazia Accardo, Domenico Frattini and Gianfranco Dell’Agli
Materials 2020, 13(3), 558; https://doi.org/10.3390/ma13030558 - 24 Jan 2020
Cited by 56 | Viewed by 4016
Abstract
Entropy-Stabilized Oxides (ESO) is a modern class of multicomponent advanced ceramic materials with attractive functional properties. Through a five-component oxide formulation, the configurational entropy is used to drive the phase stabilization over a reversible solid-state transformation from a multiphase to a single-phase state. [...] Read more.
Entropy-Stabilized Oxides (ESO) is a modern class of multicomponent advanced ceramic materials with attractive functional properties. Through a five-component oxide formulation, the configurational entropy is used to drive the phase stabilization over a reversible solid-state transformation from a multiphase to a single-phase state. In this paper, a new transition metal/rare earth entropy-stabilized oxide, with composition Ce0.2Zr0.2Y0.2Gd0.2La0.2O2−δ, was found after several investigations on alternative candidate systems. X-Ray Diffraction (XRD) analyses of calcined powders pointed out different behavior as a function of the composition and a single-phase fluorite structure was obtained after a specific thermal treatment at 1500 °C. Powders presented the absence of agglomeration, so that the sintered specimen exhibited sufficient densification with a small porosity, uniformly distributed in the sample. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
►▼ Show Figures

Figure 1

33 pages, 9024 KiB  
Article
Performance of PATC-PDMDAAC Composite Coagulants in Low-Temperature and Low-Turbidity Water Treatment
by Peng Zhang, Lina Liao and Guocheng Zhu
Materials 2019, 12(17), 2824; https://doi.org/10.3390/ma12172824 - 02 Sep 2019
Cited by 23 | Viewed by 3902
Abstract
A novel composite was synthesized by using flocculant polyaluminum titanium silicate chloride (PATC) and poly(diallyldimethylammonium chloride) (PDMDAAC) monomers to treat low-temperature and low-turbidity water. The structure and physicochemical properties of PATC-PDMDAAC were analyzed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis/differential scanning calorimetry [...] Read more.
A novel composite was synthesized by using flocculant polyaluminum titanium silicate chloride (PATC) and poly(diallyldimethylammonium chloride) (PDMDAAC) monomers to treat low-temperature and low-turbidity water. The structure and physicochemical properties of PATC-PDMDAAC were analyzed by Fourier transform infrared spectroscopy (FTIR), thermogravimetric analysis/differential scanning calorimetry (TG/DSC), X-ray diffraction spectroscopy (XRD), and scanning electron microscopy–energy dispersion spectrum (SEM-EDS). The compound flocculant produced new functional groups exhibiting great thermal stability, and the complex chemical reaction between the two monomers generated new substances with reticular structures. Coagulation performance results showed that the PATC-PDMDAAC had an organic and inorganic ratio of 0.15 and exhibited excellent removal efficiency at pH 9.0, dosage of 1.80 mg/L, sedimentation time of 40 min, and a stirring speed of 110 r/min. The optimal treatment efficiency reduced the turbidity to 0.56 NTU (Nephelometric Turbidity Unit). The removal rates of TOC (Total Organic Carbon) and UV254 (Ultraviolet 254) were 62.18% (from 7.23 mg/L to 2.734 mg/L) and 99.99% (from 10 mg/L to 0.001 mg/L). The 3D fluorescence, zeta potential and kinetic analysis in the flocculation process indicated that coagulant electroneutralization and adsorption bridge in a slightly alkaline environment played a dominant role, and a sufficient and effective collision occurred between the coagulant and particulate matter under the optimal dosage. Lastly, PATC-PDMDAAC has more advantage than conventional flocculants in the treatment of low-temperature and low-turbidity water in the Xiangjiang River. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
►▼ Show Figures

Graphical abstract

10 pages, 2587 KiB  
Article
Effect of Sodium Hydroxide Concentration in Synthesizing Zinc Selenide/Graphene Oxide Composite via Microwave-Assisted Hydrothermal Method
by Han Kee Lee, Zainal Abidin Talib, Md Shuhazlly Mamat @ Mat Nazira, EnZe Wang, Hong Ngee Lim, Mohd Adzir Mahdi, Eng Khoon Ng, Norita Mohd Yusoff, Batool Eneaze AL-Jumaili and Josephine Ying Chyi Liew
Materials 2019, 12(14), 2295; https://doi.org/10.3390/ma12142295 - 18 Jul 2019
Cited by 9 | Viewed by 3028
Abstract
The effect of NaOH solution on the formation of nanoparticles has been the subject of ongoing debate in selenium-based material research. In this project, the robust correlation between the mechanistic growth of zinc selenide/graphene oxide (ZnSe/GO) composite and the concentration of NaOH are [...] Read more.
The effect of NaOH solution on the formation of nanoparticles has been the subject of ongoing debate in selenium-based material research. In this project, the robust correlation between the mechanistic growth of zinc selenide/graphene oxide (ZnSe/GO) composite and the concentration of NaOH are elucidated. The ZnSe/GO composite was synthesized via microwave-assisted hydrothermal method and the concentrations of NaOH are controlled at 2 M, 3 M, 4 M, 5 M and 6 M. The XRD spectra show that the crystal phases of the samples exhibited a 100% purity of ZnSe when the concentration of sodium hydroxide (NaOH) was set at 4 M. The further increase of NaOH concentration leads to the formation of impurities. This result reflects the essential role of hydroxyl ions in modifying the purity state of ZnSe/GO composite. The optical band gap energy of ZnSe/GO composite also decreased from 2.68 eV to 2.64 eV when the concentration of NaOH increased from 2 M to 4 M. Therefore, it can be concluded that the optimum concentration of NaOH used in synthesizing ZnSe/GO composite is 4 M. This project provides an alternative green method in the formation of a high purity ZnSe/GO composite. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
►▼ Show Figures

Figure 1

17 pages, 3060 KiB  
Article
New Insights in the Hydrothermal Synthesis of Rare-Earth Carbonates
by Luca Spiridigliozzi, Claudio Ferone, Raffaele Cioffi, Mauro Bortolotti and Gianfranco Dell’Agli
Materials 2019, 12(13), 2062; https://doi.org/10.3390/ma12132062 - 27 Jun 2019
Cited by 9 | Viewed by 2553
Abstract
The rare-earth carbonates represent a class of materials with great research interest owing to their intrinsic properties and because they can be used as template materials for the formation of other rare earth phases, particularly of rare-earth oxides. However, most of the literature [...] Read more.
The rare-earth carbonates represent a class of materials with great research interest owing to their intrinsic properties and because they can be used as template materials for the formation of other rare earth phases, particularly of rare-earth oxides. However, most of the literature is focused on the synthesis and characterization of hydroxycarbonates. Conversely, in the present study we have synthesized both rare-earth carbonates—with the chemical formula RE2(CO3)3·2-3H2O, in which RE represents a generic rare-earth element, and a tengerite-type structure with a peculiar morphology—and rare-earth hydroxycarbonates with the chemical formula RECO3OH, by hydrothermal treatment at low temperature (120 °C), using metal nitrates and ammonium carbonates as raw materials, and without using any additive or template. We found that the nature of the rare-earth used plays a crucial role in relation to the formed phases, as predicted by the contraction law of lanthanides. In particular, the hydrothermal synthesis of rare-earth carbonates with a tengerite-type structure was obtained for the lanthanides from neodymium to erbium. A possible explanation of the different behaviors of lighter and heavier rare-earths is given. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
►▼ Show Figures

Figure 1

Review

Jump to: Research, Other

18 pages, 2017 KiB  
Review
Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review
by Guijun Yang and Soo-Jin Park
Materials 2019, 12(7), 1177; https://doi.org/10.3390/ma12071177 - 11 Apr 2019
Cited by 319 | Viewed by 18915
Abstract
With the continuous development and progress of materials science, increasingly more attention has been paid to the new technology of powder synthesis and material preparation. The hydrothermal method is a promising liquid phase preparation technology that has developed rapidly during recent years. It [...] Read more.
With the continuous development and progress of materials science, increasingly more attention has been paid to the new technology of powder synthesis and material preparation. The hydrothermal method is a promising liquid phase preparation technology that has developed rapidly during recent years. It is widely used in many fields, such as the piezoelectric, ferroelectric, ceramic powder, and oxide film fields. The hydrothermal method has resulted in many new methods during the long-term research process, such as adding other force fields to the hydrothermal condition reaction system. These force fields mainly include direct current, electric, magnetic (autoclaves composed of non-ferroelectric materials), and microwave fields. Among them, the microwave hydrothermal method, as an extension of the hydrothermal reaction, cleverly uses the microwave temperature to compensate for the lack of temperature in the hydrothermal method, allowing better practical application. This paper reviews the development of the hydrothermal and microwave hydrothermal methods, introduces their reaction mechanisms, and focuses on the practical application of the two methods. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
►▼ Show Figures

Figure 1

Other

Jump to: Research, Review

2 pages, 154 KiB  
Reply
Author Response to Comment on: Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review
by Guijun Yang and Soo-Jin Park
Materials 2019, 12(21), 3640; https://doi.org/10.3390/ma12213640 - 05 Nov 2019
Cited by 35 | Viewed by 1940
Abstract
We recently published an article “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review” on Materials, and we are honored to receive a comment article from Jalouli et al. We will give a detailed explanation for the confusion of the [...] Read more.
We recently published an article “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review” on Materials, and we are honored to receive a comment article from Jalouli et al. We will give a detailed explanation for the confusion of the mechanism of crystal nucleation and growth in the comment article. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
2 pages, 163 KiB  
Comment
A comment on: “Conventional and Microwave Hydrothermal Synthesis and Application of Functional Materials: A Review”
by Behrouz Jalouli, Aref Abbasi and S. Mohammad Musavi Khoei
Materials 2019, 12(21), 3631; https://doi.org/10.3390/ma12213631 - 05 Nov 2019
Cited by 12 | Viewed by 2138
Abstract
In the recent paper published in Materials (Yang et al., 2019), there is a mistake in the explanation of crystal growth mechanism of the hydrothermal method. The error in this article is discussed in this short communication. Full article
(This article belongs to the Special Issue Conventional and Microwave Hydrothermal Synthesis of Functional Materials)
Show export options expand_more Show export options expand_less
Select all
Export citation of selected articles as:
 
Displaying articles 1-7
Back to TopTop