Journal ArticleDOI
The structure and ferroelastic phase transition of BiVO4
Reads0
Chats0
TLDR
The structure of BiVO4 has been determined by the Rietveld method at 300, 573 and 898 K and confirms the space group of the ferroelastic phase as 12/a and that of the paraelastic phase was 141/a as discussed by the authors.Abstract:
The structure of BiVO4 has been determined by the Rietveld method at 300, 573 and 898 K and confirms the space group of the ferroelastic phase as 12/a and that of the paraelastic phase as 141/a. The displacement vectors of the atoms involved in the switching of ferroelastic states are calculated and indicate that the Bi displacements are the controlling factors in the process. An analysis is given of the eigenvectors of the Bg mode responsible for the transition.read more
Citations
More filters
Journal ArticleDOI
Selective Preparation of Monoclinic and Tetragonal BiVO4 with Scheelite Structure and Their Photocatalytic Properties
TL;DR: In this article, the photocatalytic activity of tetragonal BiVO4 for O2 evolution from an aqueous AgNO3 solution under visible light irradiation was negligible.
Journal ArticleDOI
Effects of Structural Variation on the Photocatalytic Performance of Hydrothermally Synthesized BiVO4
Jianqiang Yu,Akihiko Kudo +1 more
TL;DR: In this paper, high-crystalline monoclinic scheelite BiVO4 powders are synthesized from aqueous Bi(NO3)3 and NH4VO3 solutions over a wide range of pH by a hydrothermal process.
Journal ArticleDOI
Bismuth based oxide electrolytes— structure and ionic conductivity
TL;DR: In this article, the authors comprehensively review the structures, thermal expansion, phase transitions, electrical conductivity and stability of bismuth oxide and doped Bismuth Oxide systems and show that they exhibit a complex array of structures and properties depending upon the dopant concentration, temperature and atmosphere.
Journal ArticleDOI
Phase transitions and ionic conductivity in Bi4V2O11 an oxide with a layered structure
TL;DR: In this article, the structure of Bi 4 V 2 O 11 consists of Bi 2 O 2 2 layers interleaved with V O 7 sheets and differentially thermal analysis showed three reversible phase transitions at 720, 840 and 1150 K.
Journal ArticleDOI
Synthesis and photocatalytic performances of BiVO4 by ammonia co-precipitation process
TL;DR: In this paper, the photocatalytic performance of Bismuth vanadate (BiVO 4 ) by a facile and inexpensive approach was reported, where an amorphous BiVO 4 was first prepared by a co-precipitation process from aqueous solutions of Bi(NO 3 ) 3 and NH 4 VO 3 using ammonia.
References
More filters
Journal ArticleDOI
A profile refinement method for nuclear and magnetic structures
TL;DR: In this paper, a structure refinement method was described which does not use integrated neutron powder intensities, single or overlapping, but employs directly the profile intensities obtained from step-scanning measurements of the powder diagram.
Journal ArticleDOI
Possible Species of “Ferroelastic” Crystals and of Simultaneously Ferroelectric and Ferroelastic Crystals
TL;DR: In this paper, a determination of all theoretically possible species of ferroelastic crystals and the number of states and ferroelectricity or nonferroelctricity in each of these species was made.
Journal ArticleDOI
Determination of the State Parameters and Formulation of Spontaneous Strain for Ferroelastics
TL;DR: In this article, the spontaneous strain of a crystal which becomes ferroelastic is defined as a linear combination of linear combinations of elements of mechanical strain tensors each of which, at null stress, is not equal in all the orientation states of the crystal and is zero over the whole temperature range in the prototypic phase.
Journal ArticleDOI
Cubic-tetragonal-orthorhombic-rhombohedral ferroelectric transitions in perovskite potassium niobate: neutron powder profile refinement of the structures
TL;DR: In this paper, a profile refinement technique was used to determine the orthorhombic and rhombohedral structures of ferroelectric potassium niobate using neutron diffraction measurements on powdered crystals.