Hard Template Synthesis of Mesoporous and Nanocrystalline Alkali Metal Niobates with Enhanced Photocatalytic Performance

2013 ◽  
Vol 367 ◽  
pp. 12-15
Author(s):  
Qing Li ◽  
Li Ya Wang ◽  
Xiu Kai Li
Keyword(s):  
Solid State ◽  
Alkali Metal ◽  
Physical Properties ◽  
Template Synthesis ◽  
Solid State Reaction ◽  
Alkali Metals ◽  
Photocatalytic Performance ◽  
Hard Template ◽  
Single Crystalline

A nanocasting method using SBA-15 as a hard template was adopted to prepare mesoporous nanocrystalline ANbO3 (A = Li, Na, and K) samples. The characteristics of samples werecharacterized by techniques such asXRD, N2-sorption measurement, HRTEM and UVDRS. It was found that thealkality of the alkali metals could have profound impacts on the synthesis andthe physical properties of samples. The Li, Na, and K precursors can reacteasily with the siliceous template, and the reactivity varies with the alkalityof the alkali metal. The synthesis of KNbO3 is unsuccessful because of the high alkality ofK. The templated LiNbO3 andNaNbO3 consist of single crystalline nanoparticles that generate interparticle mesoporosity. The LiNbO3andNaNbO3 samples showed notably enhanced photocatalytic activitiesfor 2-propanol photodegradation in comparison to the counterparts prepared bythe solid state reaction.

Effect of Ag2O Doping on Some Physical Properties Y145 Superconductor

2016 ◽  
Vol 851 ◽  
pp. 57-60 ◽  
Author(s):  
Theerathawan Panklang ◽  
Rattanasuda Supadanaison ◽  
Chalit Wanichayanan ◽  
Adullawich Kaewkao ◽  
Tunyanop Nilkamjon ◽  
...  
Keyword(s):  
Critical Temperature ◽  
Solid State ◽  
Physical Properties ◽  
Porous Structure ◽  
Solid State Reaction ◽  
Annealing Temperature ◽  
Sintering Temperature

In this paper, the Y145 superconductor doped Ag2O were synthesized by solid state reaction. The calcinations and sintering temperature were at 920 °C and annealing temperature was at 550 °C. The highest critical temperature was in Y145+0.1Ag sample with Tc onset at 96 K and the lowest was found in pure Y145 at 95 K. We found that the surface of Y145 superconductor was improved by Ag adding on the porous structure.

Selective decoration of nanocrystals on single-crystalline PtTe nanowires based on a solid-state reaction

RSC Advances ◽  
2015 ◽  
Vol 5 (98) ◽  
pp. 80766-80771
Author(s):  
Byeong Geun Kim ◽  
Jin-Hyung Lee ◽  
Soon-Mok Choi
Keyword(s):  
Solid State ◽  
Thermal Annealing ◽  
Solid State Reaction ◽  
Core Shell ◽  
Single Crystalline ◽  
Shell Nanowires

We demonstrate the fabrication of single-crystalline PtTe nanowires with/without decoration of Sb nanocrystals via thermal annealing of Sb2Te3/Pt and Te/Pt core/shell nanowires.

Photocatalytic performance of Pr/In/Nd composite oxides synthesized by solid state reaction

2013 ◽  
Vol 39 (6) ◽  
pp. 6583-6589 ◽  
Author(s):  
Huiquan Li ◽  
Yumin Cui ◽  
Wenshan Hong ◽  
Suhua Fan ◽  
Liangjun Zhu
Keyword(s):  
Solid State ◽  
Solid State Reaction ◽  
Photocatalytic Performance ◽  
Composite Oxides

Synthesis, Crystal Structure and Physical Properties of Ba4Ti12O27

2013 ◽  
Vol 566 ◽  
pp. 211-214 ◽  
Author(s):  
Kunimitsu Kataoka ◽  
Hiroshi Hayakawa ◽  
Akira Iyo ◽  
Ken-Ichi Ohshima ◽  
Junji Akimoto
Keyword(s):  
Crystal Structure ◽  
Magnetic Susceptibility ◽  
Solid State ◽  
Barium Titanate ◽  
Physical Properties ◽  
Solid State Reaction ◽  
Polycrystalline Sample ◽  
Van Vleck Paramagnetism ◽  
Van Vleck ◽  
Vleck Paramagnetism

Polycrystalline sample of the reduced barium titanate Ba4Ti12O27 was prepared by solid state reaction in Ar atmosphere. The magnetic susceptibility was nearly temperature independent in the range of 75-300 K, suggesting the Van Vleck Paramagnetism. The temperature dependence of the electric conductivity does not obey any Arrhenius type behavior.

scholarly journals New mixed aluminium–chromium diarsenate

2017 ◽  
Vol 73 (3) ◽  
pp. 345-348 ◽  
Author(s):  
Mohamad Alem Bouhassine ◽  
Habib Boughzala
Keyword(s):  
Crystal Structure ◽  
Solid State ◽  
Alkali Metal ◽  
Solid State Reaction ◽  
Three Dimensional ◽  
Axis Direction ◽  
Anionic Framework

Potassium chromium aluminium diarsenate, KCr1/4Al3/4As2O7, was prepared by solid-state reaction. The structure consists of (Cr1/4/Al3/4)O6octahedra and As2O7diarsenate groups sharing corners to build up a three-dimensional anionic framework. The potassium cations are located in wide channels running along thec-axis direction. The crystal structure is isostructural with the triclinicAIMIIIX2O7(AI= alkali metal;MIII= Al, Cr, Fe;X= As, P) compounds. However, theMIIIoctahedrally coordinated site is 25% partially occupied by chromium and 75% by aluminium.

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