Ethylene glycol-assisted coating of titania on nanoparticles

2016 ◽  
Vol 45 (24) ◽  
pp. 10076-10084 ◽  
Author(s):  
Michael Dahl ◽  
Fernando Castaneda ◽  
Ji Bong Joo ◽  
Victor Reyes ◽  
James Goebl ◽  
...  
Keyword(s):  
High Temperature ◽  
Ethylene Glycol ◽  
Titanium Alkoxide ◽  
Titanium Glycolate ◽  
High Temperature Calcination

Ethylene glycol can complex with titanium alkoxide to yield a chelated and stabilized titanium glycolate species that can be used as an excellent precursor for coating nanoscale colloidal objects. The titanium glycolate coating can be converted to crystalline TiO2 either through high temperature calcination or refluxing in water.

scholarly journals Purification of fused alumina by high temperature calcination in vacuum

2019 ◽  
Vol 1385 ◽  
pp. 012041
Author(s):  
G E Belyaev ◽  
A V Grigorenko ◽  
M S Vlaskin ◽  
I A Lipatova ◽  
E I Shkolnikov ◽  
...  
Keyword(s):  
High Temperature ◽  
High Temperature Calcination

Structural and optical amendment ofPVDF into CQDsthrough high temperature calcination process

2021 ◽  
pp. 130616
Author(s):  
Gun Anit Kaur ◽  
Vinit Sharma ◽  
Neeraj Gupta ◽  
Mamta Shandilya ◽  
Radheshyam Rai
Keyword(s):  
High Temperature ◽  
Calcination Process ◽  
High Temperature Calcination

Construction of a CsPbBr3 modified porous g-C3N4 photocatalyst for effective reduction of CO2 and mechanism exploration

2021 ◽  
Author(s):  
Yunqi Wang ◽  
Zhixiang Liu ◽  
Xu Tang ◽  
Pengwei Huo ◽  
Zhi Zhu ◽  
...  
Keyword(s):  
High Temperature ◽  
Porous Structure ◽  
Freeze Drying ◽  
Drying Method ◽  
Full Spectrum ◽  
Effective Reduction ◽  
Reduction Of Co2 ◽  
High Temperature Calcination

A P-CN/CsPbBr3 photocatalyst with a lamellar porous structure was prepared by a high temperature calcination and freeze drying method, and it exhibited superior CO2 reduction performance under the conditions of full spectrum irradiation.

Influences of Calcination Ambiences on Phase Composition and High Temperature Oxidation Resistance Property of Ceramic Coatings on Ti–6Al–4V Alloy by Micro-Plasma Oxidation

2007 ◽  
Vol 336-338 ◽  
pp. 2481-2483 ◽  
Author(s):  
Guo Dong Hao ◽  
Zhao Hua Jiang ◽  
Zhong Ping Yao ◽  
Heng Ze Xian ◽  
Yan Li Jiang
Keyword(s):  
Phase Composition ◽  
High Temperature ◽  
Oxidation Resistance ◽  
High Temperature Oxidation ◽  
Ceramic Coatings ◽  
Plasma Oxidation ◽  
Temperature Oxidation ◽  
Complete Decomposition ◽  
Weight Gains ◽  
High Temperature Calcination

Compound ceramic coatings with the main crystalline of Al2TiO5 (as-coated samples) were prepared on Ti-6Al-4V alloy by pulsed bi-polar micro-plasma oxidation (MPO) in NaAlO2 solution. The coated samples were calcined in Ar and air at 1000oC, respectively. The phase composition, morphology and element content of the coatings were investigated by XRD, SEM and XRF. The samples treated in Ar and the as-coated ones were calcined in air at 1000oC to study the oxidation resistance of the samples. The results showed that Al2TiO5 decomposed and transformed into corundum and rutile TiO2 during the high temperature calcination. Al2TiO5 decomposed very quickly in air and the proportion of Al2O3 to TiO2 was 44:55 after a complete decomposition. On the contrary, Al2TiO5 decomposed very slowly in argon with the final proportion of Al2O3 to TiO2 of 81:18 on the coating surface. The morphology of the ceramic coatings after the calcination was also different. The coatings calcined in argon were fined: the grains and pores were smaller than those of the coatings calcined in air. The weight gains of both coatings changed in the form of parabola law, and the weight gains of the coated samples treated in argon were comparatively lower than that of the as-coated samples. During the high temperature calcination, the samples treated in argon cannot distort easily, compared with the as-coated ones.

scholarly journals Self-propagating High-temperature Synthesis of Materials Based on Tungsten Carbide for One-Pot Hydrolysis-Hydrogenolysis of Cellulose Into Ethylene Glycol and 1,2-Propylene Glycol

2019 ◽  
pp. 269-281
Author(s):  
Nikolay V. Gromov ◽  
Тatiana B. Medvedeva ◽  
Ivan А. Lukoyanov ◽  
Alekasandr А. Zhdanok ◽  
Vladimir А. Poluboyarov ◽  
...  
Keyword(s):  
High Temperature ◽  
Ethylene Glycol ◽  
Tungsten Carbide ◽  
Propylene Glycol ◽  
Reaction Rate ◽  
Total Yield ◽  
Temperature Synthesis ◽  
One Pot ◽  
Catalytic Systems ◽  
High Temperature Synthesis

Catalytic systems based on tungsten carbide (WnC) containing mainly W2C were obtained by the method of self-propagating high-temperature synthesis from a mechanochemically activated mixture of tungsten oxide, metallic magnesium, carbon black and CaCO3. The phase composition of the formed materials was shown to depend on the amount of CaCO3. The catalytic properties of the materials were tested in the hydrolysis-hydrogenation of cellulose to ethylene glycol (EG) and 1,2-propylene glycol (PG). It was established that in the presence of WnC the main products of the reaction were EG and PG with a ratio of PG/EG – 1.5-1.8. The deposition of nickel nanoparticles on the WnC surface increased the reaction rate and product yields. The maximum total yield of diols was 47.1 mol. %.

Depolymerization of Poly(ethylene terephthalate) to Terephthalic Acid and Ethylene Glycol in High-temperature Liquid Water

2009 ◽  
Vol 38 (3) ◽  
pp. 268-269 ◽  
Author(s):  
Osamu Sato ◽  
Eiichi Mine ◽  
Mitsumasa Osada ◽  
Norihito Hiyoshi ◽  
Aritomo Yamaguchi ◽  
...  
Keyword(s):  
High Temperature ◽  
Ethylene Glycol ◽  
Liquid Water ◽  
Terephthalic Acid ◽  
Ethylene Terephthalate ◽  
Poly Ethylene Terephthalate ◽  
Temperature Liquid ◽  
Poly Ethylene

Calcination-carbonization two-step process to improve the brightness of fly ash and its application in paper filling

2019 ◽  
Vol 34 (1) ◽  
pp. 59-66
Author(s):  
Hui-ming Fan ◽  
Gao-peng Zhu ◽  
Ya-nan Qi ◽  
Jian-an Liu
Keyword(s):  
High Temperature ◽  
Fly Ash ◽  
Magnetic Particles ◽  
Unburned Carbon ◽  
Key Factors ◽  
Step Method ◽  
Carbonation Reaction ◽  
Carbon Particles ◽  
Composite Filler ◽  
High Temperature Calcination

Abstract Chromogenic sources such as carbon particles and magnetic particles are the key factors restricting the brightness of fly ash. This study explored the feasibility of calcination-carbonation two-step method to improve the brightness of fly ash and apply it to paper filling. The results show that Under the condition of high temperature, the unburned carbon particles in fly ash are removed, and the brightness of fly ash is increased from 30 %ISO to 49 %ISO with the increase of burning loss. The dense calcium carbonate coating can be formed on the surface of fly ash particles modified by the carbonation reaction process after high temperature calcination, and the brightness of fly ash can be further raised to about 66 %ISO. The composite filler prepared by two-step method can be used to paper filling, the brightness of the paper can reach 76 % ISO, and it has good opacity at 20 % filling. Therefore, it is feasible to prepare fly ash-based composite filler by calcining-carbonization method.

Controllable design of double metal oxide (NiCo2O4)-modified CdS for efficient photocatalytic hydrogen production

2019 ◽  
Vol 21 (8) ◽  
pp. 4501-4512 ◽  
Author(s):  
Xian Yan ◽  
Zhiliang Jin ◽  
Yupeng Zhang ◽  
Hai Liu ◽  
Xiaoli Ma
Keyword(s):  
High Temperature ◽  
Hydrogen Production ◽  
Metal Oxide ◽  
Hydrothermal Method ◽  
High Efficiency ◽  
Composite Photocatalyst ◽  
Photocatalytic Hydrogen Production ◽  
High Temperature Calcination

In the present study, we have successfully synthesized a kind of high-efficiency NiCo2O4/CdS composite photocatalyst using the hydrothermal method and high-temperature calcination.

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