A molten salt-based nitridation approach for synthesizing nanostructured InN electrode materials

Abstract Refractory ‘stuffed’ pyrochlores such as Gd2TiO5 are of interest for nuclear applications, including as matrices for actinide disposition and as neutron absorbers in control rods. Here, we report the results of a preliminary comparative investigation of the synthesis of Gd2TiO5 by molten salt and conventional solid-state synthesis. We show that synthesis of Gd2TiO5 proceeds from the pyrochlore phase Gd2Ti2O7 which is first formed as a kinetic product. Molten salt synthesis afforded single phase Gd2TiO5 at 1300 °C in 2 h, via a template growth mechanism, and is effective for the synthesis of these refractory materials. This work demonstrates molten salt mediated synthesis of ‘stuffed’ pyrochlore for the first time. Graphic abstract

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Mechanical and Thermoelectric Properties of Bulk AlSb Synthesized by Controlled Melting, Pulverizing and Subsequent Vacuum Hot Pressing

Applied Sciences ◽

10.3390/app9081609 ◽

2019 ◽

Vol 9 (8) ◽

pp. 1609 ◽

Cited By ~ 3

Author(s):

A. K. M. Ashiquzzaman Shawon ◽

Soon-Chul Ur

Keyword(s):

Mechanical Properties ◽

Intermetallic Compound ◽

Thermoelectric Properties ◽

Hot Pressing ◽

Single Phase ◽

Aluminum Antimonide ◽

Simple Method ◽

Group Iii ◽

Indirect Band Gap ◽

First Time

Aluminum antimonide is a semiconductor of the Group III-V order. With a wide indirect band gap, AlSb is one of the least discovered of this family of semiconductors. Bulk synthesis of AlSb has been reported on numerous occasions, but obtaining a single phase has always proven to be extremely difficult. This work reports a simple method for the synthesis of single-phase AlSb. Subsequently, consolidation was done into a near single-phase highly dense semiconductor in a form usable for thermoelectric applications. Further, the thermoelectric properties of this system are accounted for the first time. In addition, the mechanical properties of the intermetallic compound are briefly discussed for a possibility of further use.

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Self-assembly synthesis of nitrogen-doped mesoporous carbons used as high-performance electrode materials in lithium-ion batteries and supercapacitors

New Journal of Chemistry ◽

10.1039/c7nj02532g ◽

2017 ◽

Vol 41 (21) ◽

pp. 12901-12909 ◽

Cited By ~ 11

Author(s):

Chunfeng Shao ◽

Ziqiang Wang ◽

Errui Wang ◽

Shujun Qiu ◽

Hailiang Chu ◽

...

Keyword(s):

Electrochemical Performance ◽

Lithium Ion Batteries ◽

Self Assembly ◽

High Performance ◽

Electrode Materials ◽

Lithium Ion ◽

Mesoporous Carbons ◽

Nitrogen Doped ◽

First Time ◽

Enhanced Electrochemical Performance

Guanine was, for the first time, used as a nitrogen source during the synthesis of nitrogen-doped porous carbons (NMCs) with enhanced electrochemical performance.

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Ion size effect on chemical bonds of the RBa2Cu2.9Zn0.1Oy system

Powder Diffraction ◽

10.1017/s0885715618000520 ◽

2018 ◽

Vol 33 (3) ◽

pp. 209-215

Author(s):

R. Benredouane ◽

C. Boudaren

Keyword(s):

Single Phase ◽

Rietveld Method ◽

Solid State Reaction Method ◽

X Ray ◽

Bond Angles ◽

Bond Valence Sum ◽

Ion Size ◽

First Time ◽

Unique Variation ◽

Strong Curvature

Single-phase polycrystalline samples of RBa2Cu2.9Zn0.1Oy (R = Y, Nd, Gd, Er, and Tm) (ZnR123) were synthesized using the standard solid-state reaction method. They were characterized by X-ray powder diffraction (XRD) and scanning electron microscope. XRD shows that all samples consist essentially of a single phase and retain the orthorhombic structure. The structure of the samples was refined by the Rietveld method with the help of the bond valence sum method. The variation of the lattice parameters and some meaningful bond angles and lengths with the ionic radius are discussed. In these compounds, the variations of the buckling angles Cu2–O(2,3)–Cu2 and Cu2–Cu2–O(2,3) are unique: the bond angles Cu2–O3–Cu2 and Cu2–Cu2–O2 increase, whereas the bond angles Cu2–O2–Cu2 and Cu2–Cu2–O3 decrease. The variation of these bond angles brings about a strong curvature of the Cu2O plane. Furthermore, we have found tree fixed triangles formed by the Cu2, O2, and O3 atoms in addition to another fixed triangle O1–Ba–O1 observed for the first time. BVS of Cu2 atom shows a specific and unique variation compared with other compounds.

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Easy approach to synthesize N/P/K co-doped porous carbon microfibers from cane molasses as a high performance supercapacitor electrode material

RSC Advances ◽

10.1039/c4ra05243a ◽

2014 ◽

Vol 4 (66) ◽

pp. 34739-34750 ◽

Cited By ~ 12

Author(s):

Alfin Kurniawan ◽

L. K. Ong ◽

Fredi Kurniawan ◽

C. X. Lin ◽

Felycia E. Soetaredjo ◽

...

Keyword(s):

Electrode Material ◽

Porous Carbon ◽

High Performance ◽

Electrode Materials ◽

Supercapacitor Electrode ◽

Cane Molasses ◽

Electrochemical Application ◽

Carbon Microfibers ◽

First Time ◽

Co Doped

For the first time, porous carbon microfibers co-doped with N/P/K were synthesized from cane molasses by combination of electrospinning and carbonization techniques and its electrochemical application to electrode materials for supercapacitors was investigated.

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MOLTEN SALT SYNTHESIS OF YF3:Yb3+/Ln3+(Ln = Er3+, Tm3+) MICROSHEETS WITH MULTICOLOR UPCONVERSION LUMINESCENCE

Functional Materials Letters ◽

10.1142/s1793604713500616 ◽

2013 ◽

Vol 06 (06) ◽

pp. 1350061 ◽

Cited By ~ 2

Author(s):

MINGYE DING ◽

CHUNHUA LU ◽

LINHAI CAO ◽

YARU NI ◽

ZHONGZI XU

Keyword(s):

Molten Salt ◽

Laser Diode ◽

Upconversion Luminescence ◽

Emission Spectra ◽

Upconversion Emission ◽

Molten Salt Synthesis ◽

Molten Salt Method ◽

Orthorhombic System ◽

Co Doping ◽

First Time

In this paper, highly crystalline YF 3: Yb 3+/ Ln 3+( Ln = Er 3+, Tm 3+) microsheets were successfully synthesized by a surfactant-free molten salt method for the first time. The results indicated that the as-obtained samples belonged to orthorhombic system and exhibited microsheets morphology with side lengths of 30 to 80 μm and wall thickness from 1 to 1.5 μm. By changing the dopant's species ( Ln 3+), multicolor (yellow and blue) upconversion emission can be observed in YF 3: Yb 3+/ Ln 3+ microsheets under 980 nm laser diode (LD) excitation. The upconversion mechanisms in co-doping YF 3 samples were analyzed in detail based on the emission spectra. Importantly, this approach not only proposes a new alternative in synthesizing such materials, but also opens the possibility to meet the increasing commercial demand.

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New metal-oxide composite materials as efficient catalysts of the partial oxidation of methane

Доклады Академии наук ◽

10.31857/s0869-56524843299-302 ◽

2019 ◽

Vol 484 (3) ◽

pp. 299-302

Author(s):

A. G. Dedov ◽

O. A. Slyakhtin ◽

A. S. Loktev ◽

G. N. Mazo ◽

S. A. Malyshev ◽

...

Keyword(s):

Partial Oxidation ◽

Single Phase ◽

Complex Oxides ◽

Partial Oxidation Of Methane ◽

Metallic Nickel ◽

Oxidation Of Methane ◽

Nickel Cobalt ◽

Phase Complex ◽

First Time ◽

Properties Of Composites

Single-phase complex oxides Nd2-yCayCoxNi1-xO4 have been synthesized for the first time. Composites prepared by the reduction of these compounds with hydrogen and containing Nd2O3, CaO, and cobalt and nickels metals have been used for the first time as catalysts of the partial oxidation of methane. The maximal methane conversions (97%) and syngas yields (96%) at 900 °С have been detected in the presence of the composite obtained from Nd1,5Ca0,5NiO4. At T < 850 °C, the nickel–cobalt composite synthesized from Nd1,3Ca0,7Co0,4Ni0,6O4 turned out to be more selective in the formation of syngas. Decreasing the partial oxidation temperature from 900 °С to 750 °С leads to the oxidation of metallic nickel and cobalt to oxides and to partial resynthesis of complex oxides with perovskite and K2NiF4 structures. The observed differences in temperature dependence of the catalytic properties of composites with various Ni/Co ratios can be associated with the participation of complex oxides in catalysis of the partial oxidation of methane at low temperatures.

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One-step ultra-rapid fabrication and thermoelectric properties of Cu2Se bulk thermoelectric material

RSC Advances ◽

10.1039/c9ra01008d ◽

2019 ◽

Vol 9 (19) ◽

pp. 10508-10519 ◽

Cited By ~ 1

Author(s):

Tiezheng Hu ◽

Yonggao Yan ◽

Si Wang ◽

Xianli Su ◽

Wei Liu ◽

...

Keyword(s):

High Temperature ◽

Thermoelectric Properties ◽

Single Phase ◽

Temperature Synthesis ◽

High Temperature Synthesis ◽

Thermoelectric Energy ◽

Rapid Fabrication ◽

One Step ◽

First Time

Cu2Se is a promising material for thermoelectric energy conversion. Fully dense single-phase bulk Cu2Se was prepared by the combination of self-propagating high-temperature synthesis with in situ quick pressing for the first time.

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Nanorod-assembled NiCo2O4 hollow microspheres assisted by an ionic liquid as advanced electrode materials for supercapacitors

RSC Advances ◽

10.1039/c7ra00067g ◽

2017 ◽

Vol 7 (18) ◽

pp. 11123-11128 ◽

Cited By ~ 18

Author(s):

Yirong Zhu ◽

Xiaobo Ji ◽

Ruiming Yin ◽

Zhongliang Hu ◽

Xiaoqing Qiu ◽

...

Keyword(s):

Ionic Liquid ◽

Hydrothermal Method ◽

Electrode Materials ◽

Hollow Microspheres ◽

First Time

In this work, nanorod-assembled NiCo2O4 hollow microspheres have been successfully prepared by an ionic liquid-assisted hydrothermal method for the first time.

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An In Vitro TORC1 Kinase Assay That Recapitulates the Gtr-Independent Glutamine-Responsive TORC1 Activation Mechanism on Yeast Vacuoles

Molecular and Cellular Biology ◽

10.1128/mcb.00075-17 ◽

2017 ◽

Vol 37 (14) ◽

Cited By ~ 26

Author(s):

Mirai Tanigawa ◽

Tatsuya Maeda

Keyword(s):

Amino Acids ◽

Nitrogen Sources ◽

Small Gtpases ◽

Activation Mechanism ◽

Kinase Assay ◽

Content Type ◽

Vacuolar Protein ◽

Vacuolar Membranes ◽

First Time

ABSTRACT Evolutionarily conserved target of rapamycin (TOR) complex 1 (TORC1) responds to nutrients, especially amino acids, to promote cell growth. In the yeast Saccharomyces cerevisiae, various nitrogen sources activate TORC1 with different efficiencies, although the mechanism remains elusive. Leucine, and perhaps other amino acids, was reported to activate TORC1 via the heterodimeric small GTPases Gtr1-Gtr2, the orthologues of the mammalian Rag GTPases. More recently, an alternative Gtr-independent TORC1 activation mechanism that may respond to glutamine was reported, although its molecular mechanism is not clear. In studying the nutrient-responsive TORC1 activation mechanism, the lack of an in vitro assay hinders associating particular nutrient compounds with the TORC1 activation status, whereas no in vitro assay that shows nutrient responsiveness has been reported. In this study, we have developed a new in vitro TORC1 kinase assay that reproduces, for the first time, the nutrient-responsive TORC1 activation. This in vitro TORC1 assay recapitulates the previously predicted Gtr-independent glutamine-responsive TORC1 activation mechanism. Using this system, we found that this mechanism specifically responds to l-glutamine, resides on the vacuolar membranes, and involves a previously uncharacterized Vps34-Vps15 phosphatidylinositol (PI) 3-kinase complex and the PI-3-phosphate [PI(3)P]-binding FYVE domain-containing vacuolar protein Pib2. Thus, this system was proved to be useful for dissecting the glutamine-responsive TORC1 activation mechanism.

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