Effects of Heat Treatment Temperature on the Photocatalytic Properties of TiO2 Prepared by Melt-Phase Separation Process

2007 ◽  
pp. 1989-1991
Author(s):  
Wen Li Zhang ◽  
Yin Lin Wu ◽  
Ying Na Zhao ◽  
Xiao Li Zhang ◽  
Hao Man Li
Keyword(s):  
Heat Treatment ◽  
Phase Separation ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Separation Process ◽  
Photocatalytic Properties ◽  
Phase Separation Process ◽  
Melt Phase

Effects of Heat Treatment Temperature on the Photocatalytic Properties of TiO2 Prepared by Melt-Phase Separation Process

2007 ◽  
Vol 336-338 ◽  
pp. 1989-1991
Author(s):  
Wen Li Zhang ◽  
Yin Lin Wu ◽  
Ying Na Zhao ◽  
Xiao Li Zhang ◽  
Hao Man Li
Keyword(s):  
Heat Treatment ◽  
Phase Separation ◽  
Heat Treatment Temperature ◽  
Glass Phase ◽  
Heat Treatment Condition ◽  
Treatment Temperature ◽  
Separation Process ◽  
Glass System ◽  
Phase Separation Process ◽  
Melt Phase

The principle of melt-phase separation process for preparation of nanoparticle TiO2 is based on the adjustment of glass phase-separation structure. TiO2 grain size can be controlled by changing heat treatment temperature. The sample was composed of Na2O-B2O3-SiO2-TiO2 glass system (melted at 1573K). A photocatalytic nanoparticle TiO2 which was loaded on porous glass can be obtained by heat treatment of glass system at various temperatures and then acid washing. The results have shown that the glass phase-separation structure size matches crystallization rate and an optimal photodegradation property of TiO2 is achieved. It was found that the suitable heat treatment condition was at 848K for 12h, although its performance slightly changes with the composition variations.

The Study of TiO2 Whiskers Prepared by Melt Phase-Splitting Method and their Photocatalytic Properties

2011 ◽  
Vol 287-290 ◽  
pp. 582-587
Author(s):  
Shui Jing Gao ◽  
Wen Li Zhang ◽  
Gui Qin Hou
Keyword(s):  
Heat Treatment ◽  
High Pressure ◽  
Heat Treatment Temperature ◽  
Splitting Method ◽  
Treatment Temperature ◽  
Photocatalytic Properties ◽  
Photocatalytic Efficiency ◽  
Crystal Type ◽  
Pressure Phase ◽  
Melt Phase

This paper studied the preparation of TiO2 whisker with melt phase-splitting method, which used tataniferous blast-furnance as the main raw materrial. XRD and SEM were used to research the phase and morphology of the sample, and by the same time, the photocatalytic properties of TiO2 crystal-beards was tested.The result have shown:the size of TiO2 crystal-beards was sub-micron rank, the crystal type wasβ-TiO2 of orthorhombic high-pressure phase. The generation of TiO2 crystal-beards were effected mainly by the content of Na2O and TiO2, and the heat treatment temperature. The sample had certain photocatalytic properties and the highest photocatalytic efficiency was 56%.

Phase Separation and Luminescence of Eu2O3 Doped Boron Silicate Glass

2012 ◽  
Vol 509 ◽  
pp. 303-307 ◽  
Author(s):  
Pei Jing Tian ◽  
Jin Shu Cheng ◽  
Gao Ke Zhang ◽  
Qin Yang
Keyword(s):  
Heat Treatment ◽  
Optical Properties ◽  
Phase Separation ◽  
Silicate Glass ◽  
Heat Treatment Temperature ◽  
Fluorescence Spectra ◽  
Treatment Temperature ◽  
Separation Region ◽  
Luminescent Intensity ◽  
The Eu

Eu2O3 doped boron silicate glass appearing phase separation have been prepared and characterized. The heat treatment temperature was determined by DTA, the microstructure and optical properties of the glass were studied by SEM and fluorescence spectra. The adding of Eu2O3 restrained the phase separation and crystallization of the glass. Eu ions exist in the glass samples as the Eu3+ ions, rather than the Eu2+ ions. As the heat treatment temperature increases, the phase separation region increased gradually, and the luminescent intensity increases.

Effects of Heat Treatment Temperature on Photocatalytic Activity of TiO2/SiO2 Composite Aerogels

2013 ◽  
Vol 27 (10) ◽  
pp. 1079-1083
Author(s):  
Zhao-Hui LIU ◽  
Gen-Liang HOU ◽  
Xun-Jia SU ◽  
Feng GUO ◽  
Zhou XIAO ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Photocatalytic Activity ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Composite Aerogels

Spin-dependent-magnetoresistance control by regulation of heat treatment temperature for magnetite nano-particle sinter

2009 ◽  
Vol 18 (12) ◽  
pp. 935-938
Author(s):  
H. Kobori ◽  
T. Asahi ◽  
Y. Yamasaki ◽  
A. Sugimura ◽  
T. Taniguchi ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Treatment Temperature ◽  
Nano Particle

scholarly journals Water Resistance and Creep Behavior of Heat-Treated Moso Bamboo Determined by the Stepped Isostress Method

Polymers ◽  
2021 ◽  
Vol 13 (8) ◽  
pp. 1264
Author(s):  
Teng-Chun Yang ◽  
Tung-Lin Wu ◽  
Chin-Hao Yeh
Keyword(s):  
Heat Treatment ◽  
Water Absorption ◽  
Creep Behavior ◽  
Heat Treatment Temperature ◽  
Water Resistance ◽  
Absorption Efficiency ◽  
Treatment Temperature ◽  
Moso Bamboo ◽  
Phyllostachys Pubescens ◽  
Heat Treated

The influence of heat treatment on the physico-mechanical properties, water resistance, and creep behavior of moso bamboo (Phyllostachys pubescens) was determined in this study. The results revealed that the density, moisture content, and flexural properties showed negative relationships with the heat treatment temperature, while an improvement in the dimensional stability (anti-swelling efficiency and anti-water absorption efficiency) of heat-treated samples was observed during water absorption tests. Additionally, the creep master curves of the untreated and heat-treated samples were successfully constructed using the stepped isostress method (SSM) at a series of elevated stresses. Furthermore, the SSM-predicted creep compliance curves fit well with the 90-day full-scale experimental data. When the heat treatment temperature increased to 180 °C, the degradation ratio of the creep resistance (rd) significantly increased over all periods. However, the rd of the tested bamboo decreased as the heat treatment temperature increased up to 220 °C.

Effect of Heat Treatment on the Microstructure and Property of TiAl Alloys Prepared by Gas Atomization Powders

2013 ◽  
Vol 747-748 ◽  
pp. 497-501
Author(s):  
Na Liu ◽  
Zhou Li ◽  
Guo Qing Zhang ◽  
Hua Yuan ◽  
Wen Yong Xu ◽  
...  
Keyword(s):  
Heat Treatment ◽  
Heat Treatment Temperature ◽  
Tial Alloy ◽  
Lamellar Microstructure ◽  
Treatment Temperature ◽  
Gas Atomization ◽  
Thermally Induced ◽  
Heat Treated ◽  
Fine Duplex ◽  
Step Heat Treatment

Powder metallurgical TiAl alloy was fabricated by gas atomization powders, and the effect of heat treatment temperature on the microstructure evolution and room tensile properties of PM TiAl alloy was investigated. The uniform fine duplex microstructure was formed in PM TiAl based alloy after being heat treated at 1250/2h followed by furnace cooling (FC)+ 900/6h (FC). When the first step heat treatment temperature was improved to 1360/1h, the near lamellar microstructure was achieved. The ductility of the alloy after heat treatment improved markedly to 1.2% and 0.6%, but the tensile strength decreased to 570MPa and 600MPa compared to 655MPa of as-HIP TiAl alloy. Post heat treatment at the higher temperature in the alpha plus gamma field would regenerate thermally induced porosity (TIP).

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