12063-93-3Relevant articles and documents
About crystalline sodium hydroxogallates
Loeper,Ge?ner,Müller,Schneider
, p. 1483 - 1488 (1997)
Two crystalline sodium hydroxogallates 4,5Na2O · Ga2O3 · 13,5 H2O (I) and 5 Na2O · Ga2O3 · 8 H2O (II), as well as a crystalline phase of the composition Na2O · Ga2O3 · 4 H2O · 2NaCl (III) are described. (I) crystallizes from sodium gallate solutions in a wide concentration field; from the X-ray single crystal diffraction analysis [1] results a three dimensional network structure, consisting of monomeric [Ga(OH)6]3- anions connected by NaO6 octahedra groups. Furthermore the structure contains water of crystallization and further hydroxide ions. (I) has to be formulated as nonasodium bis(hexahydroxogallate) trihydroxide hexahydrate Na9[Ga(OH)6]2(OH)3 · 6H2O; it is isotypic with the corresponding sodium hydroxoaluminate [2, 3]. 5 Na2O · Ga2O3 · 8 H2O (II) was obtained from (I) in presence of sodium hydroxide by dehydration over P4O10 in an inert atmosphere (N2) at room temperature. (II) crystallizes tetragonally and is isotypic with Na10[Al(OH)6]2(OH)4 [4]. Accordingly it could be described as a decasodium bis(hexahydroxogallate) tetrahydroxide, Na10[Ga(OH)6]2(OH)4. Na2O · Ga2O3 · 4H2O · 2NaCl (III) was obtained by addition of sodium chloride to sodium gallate solutions. (III) crystallizes also tetragonally and is isotypic with (Na2[Al(OH)4]Cl [5]. Correspondingly, it has to be formulated as disodium tetrahydroxogallate chloride Na2[Ga(OH)4]Cl. The results of 71Ga and 23Na MAS NMR investigations of the compounds (I) to (III) and their thermal behaviour are discussed.
Energetics of the charge-coupled substitution Si4+ → Na+ + T3+ in the glasses NaTO2-SiO2 (T = Al, Fe, Ga, B)
De Yoreo,Navrotsky,Dingwell
, p. 2068 - 2072 (1990)
Heats of solution in molten 2PbO·B2O3 at 973 K are reported for glasses xNaT3+O2-(1 - x)SiO2 for T = Fe, Ga. These measurements, combined with previous data for T = Al, B, give a relative measure of the enthalpy of the charge-coupled substitution Si4+ → Na+ + T3+. The heats of solution become more endothermic with increasing x for x ≤ 0.5 and exhibit a maximum near x = 0.5. This indicates an exothermic enthalpy for the substitution and an overall stabilization of the glasses.
New double formates Na3M(HCOO)6 (M = Ga, In) with diamond-like metal framework: Synthesis, structure and coordination modes
Su, Jie,Wang, Yingxia,Li, Weihong,Yang, Sihai,Li, Guobao,Liao, Fuhui,Lin, Jianhua
, p. 39 - 43 (2009)
Two new double formates, Na3M(HCOO)6 (M = Ga, In), have been synthesized by using quasi-solvothermal method. Both compounds are isostructural, crystallizing in orthorhombic space group Pccn, with lattice parameters a = 14.6279(5) ?,
γ-Sodium gallate: A rietveld refinement using X-ray powder diffraction
Villafuerte-Castrejon, Maria-Elena,Bucio, Lauro,Sanchez-Arjona, Angel,Duque, Julio,Pomes, Ramon
, p. i69-i70 (2002)
The synthesis and the structural characterization of γ-sodium gallate was presented. The crystal structure was found to belong to the orthorhombic system and was characterized by a Rietveld refinement of the x-ray powder diffraction pattern. The structure of this compound was similar to the structures exhibited by the γ phases of many tetrahedral oxides.
Shape-controlled synthesis and facet-dependent performance of single-crystal Bi25GaO39 photocatalysts
Liu, Jin,Lu, Wei,Tian, Boshi,Hu, Bin,Jin, Lin,Shi, Yurong,Li, Lili,Wang, Zhenling
, p. 7715 - 7721 (2016)
Single-crystal Bi25GaO39 cubes with exposed {100} facets and Bi25GaO39 tetrahedra with exposed {111} and {112} facets were successfully synthesized through a facile hydrothermal route without using any template or organic surfactant for the first time. The formation process studies indicate that the amounts of NaOH and NaGaO2 play an important role in the nucleation and growth rate of Bi25GaO39 crystals. PL spectra and photoelectrochemical measurements indicate that the separation efficiency of photogenerated electron-hole pairs in Bi25GaO39 tetrahedra is higher than that in Bi25GaO39 cubes. Moreover, Bi25GaO39 tetrahedra exhibited superior photocatalytic activity in comparison with Bi25GaO39 cubes for the degradation of AR1 and 4-NP pollutants, which may be primarily ascribed to the differences in exposed facets.
GaN crystals prepared through solid-state metathesis reaction from NaGaO2 and BN under high pressure and high temperature
Ma, Huan,He, Duanwei,Lei, Li,Wang, Shanmin,Chen, Ying,Wang, Haikuo
, p. L124-L127 (2011)
GaN crystals are successfully obtained through solid-state metathesis (SSM) reaction between sodium gallium oxide (NaGaO2) and boron nitride (BN) under high pressure and high temperature. X-ray diffraction (XRD) pattern indicates that the attained GaN crystals possess a hexagonal wurtzite-type structure. Scanning electron microscopy (SEM) is used to estimate the size and morphology of GaN crystals, and results show that GaN grains with the size over 100 μm can be prepared at 5 GPa and 1600 °C. Moreover, pressure-temperature (P-T) formation region of GaN has been discussed. Our results suggest a promising novel route for synthesizing GaN crystals from SSM reactions under high pressure.
A porous ZnGaNO photoanode for efficient water oxidation modified by a Co-based electrocatalyst
Yan,Zou
supporting information, p. 3856 - 3861 (2015/03/04)
Porous ZnGaNO microrods were synthesized by a single crystal internal decomposition route, and exhibited high performance in photoelectrochemical water splitting due to the high specific area and short charge transfer distance of the microstructure. This journal is
