Mild hydrothermal synthesis of γ-MnO2 nanostructures and their phase transformation to α-MnO2 nanowires

2011 ◽  
Vol 26 (17) ◽  
pp. 2268-2275 ◽  
Author(s):  
Yaqoob Khan ◽  
Shahid Khan Durrani ◽  
Mazhar Mehmood ◽  
Muhammad Riaz Khan
Keyword(s):  
Phase Transformation ◽  
Hydrothermal Synthesis ◽  
Image Position ◽  
Mno2 Nanowires

Abstract

Hydrothermal synthesis and properties of BiVO4 photocatalysts

2013 ◽  
Vol 28 (24) ◽  
pp. 3408-3416 ◽  
Author(s):  
Wei Wei ◽  
Xuejie Yue ◽  
Henglv Cui ◽  
Xiaomeng Lü ◽  
Jimin Xie
Keyword(s):  
Hydrothermal Synthesis ◽  
Image Position

Abstract

scholarly journals An unexpected phase transformation of ceria nanoparticles in aqueous media

2019 ◽  
Vol 34 (3) ◽  
pp. 465-473
Author(s):  
Satyanarayana V.N.T. Kuchibhatla ◽  
Ajay S. Karakoti ◽  
Andreas E. Vasdekis ◽  
Charles F. Windisch ◽  
Sudipta Seal ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Aqueous Media ◽  
Ceria Nanoparticles ◽  
Image Position

Abstract

Phase transformation of poly (vinylidene difluoride) in energy harvesting

2011 ◽  
Vol 26 (1) ◽  
pp. 1-8 ◽  
Author(s):  
Hong Liang ◽  
Rodrigo Cooper ◽  
Jason Files
Keyword(s):  
Phase Transformation ◽  
Energy Harvesting ◽  
Vinylidene Difluoride ◽  
Image Position

Abstract

Volume Change in Ternary Zn-Al-Cu Alloy

1983 ◽  
Vol 21 ◽  
Author(s):  
N. Mykura ◽  
S. Murphy ◽  
Y.H. Zhu
Keyword(s):  
Phase Transformation ◽  
Ternary System ◽  
Average Density ◽  
Phase Reaction ◽  
Dimensional Changes ◽  
Cu Alloy ◽  
Ε Phase ◽  
To Come ◽  
Image Position ◽  
T Phase

The alloys of the ternary system Zn-Al-Cu are characterised by dimensional changes that occur on ageing in conjunction with certain phase transformations and changes in solid solubility [1]. The phase transformation that is suggested to be responsible is the four phase reactionthat occurs below 273°C [2]. The average density of the products of this reaction was hypothesised to be less than that of the reactants resulting in an increase in volume. Previous work [3] had indicated that the lattice parameters of the zinc structure cell varied considerably on ageing and this change was attributed to the change in solubility of substitutionally dissolved copper. On ageing it is hypothesised that copper tends to come out of solution in zinc, contributing to the total increase in volume. This copper may come out as ε-phase which may react to form T'-phase with a resulting change in volume.

Microstructure and phase transformation of forged Mg–3.7Zn–0.3Y–0.3Gd quasicrystal alloy

2015 ◽  
Vol 30 (10) ◽  
pp. 1693-1700 ◽  
Author(s):  
Yang Yang ◽  
Kui Zhang ◽  
Minglong Ma ◽  
Xinggang Li
Keyword(s):  
Phase Transformation ◽  
Image Position

Abstract

Effect of Zn, Au, and In on the polymorphic phase transformation in Cu6Sn5 intermetallics

2012 ◽  
Vol 27 (20) ◽  
pp. 2609-2614 ◽  
Author(s):  
Guang Zeng ◽  
Stuart D. McDonald ◽  
Qinfen Gu ◽  
Kazuhiro Nogita
Keyword(s):  
Phase Transformation ◽  
Image Position

Abstract

scholarly journals Hydrothermal Synthesis and Gas Sensing of Monoclinic MoO3 Nanosheets

Nanomaterials ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 891
Author(s):  
Teodóra Nagyné-Kovács ◽  
Levente Studnicka ◽  
István Endre Lukács ◽  
Krisztina László ◽  
Pawel Pasierb ◽  
...  
Keyword(s):  
Phase Transformation ◽  
Reaction Time ◽  
Hydrothermal Synthesis ◽  
Cetyltrimethylammonium Bromide ◽  
Gas Sensing ◽  
Molybdenum Oxides ◽  
Reaction Parameters ◽  
Gas Sensing Properties ◽  
Two Phases ◽  
First Time

Effects of different reaction parameters in the hydrothermal synthesis of molybdenum oxides (MoO3) were investigated and monoclinic (β-) MoO3 was prepared hydrothermally for the first time. Various temperatures (90/210 °C, and as a novelty 240 °C) and durations (3/6 h) were used. At 240 °C, cetyltrimethylammonium bromide (CTAB) and CrCl3 additives were also tested. Both the reaction temperatures and durations played a significant role in the formation of the products. At 90 °C, h-MoO3 was obtained, while at 240 °C the orthorhombic (α-) MoO3 formed with hexagonal rod-like and nanofibrous morphology, respectively. The phase transformation between these two phases was observed at 210 °C. At this temperature, the 3 h reaction time resulted in the mixture of h- and α-MoO3, but 6 h led to pure α-MoO3. With CTAB the product was bare o-MoO3, however, when CrCl3 was applied, pure metastable m-MoO3 formed with the well-crystallized nanosheet morphology. The gas sensing of the MoO3 polymorphs was tested to H2, which was the first such gas sensing study in the case of m-WO3. Monoclinic MoO3 was found to be more sensitive in H2 sensing than o-MoO3. This initial gas sensing study indicates that m-MoO3 has promising gas sensing properties and this MoO3 polymorph is promising to be studied in detail in the future.

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