Optimization hydrothermal synthesis conditions for nano‐sized (Na 0.5 Bi 0.495 Nd 0.005 )TiO 3 particles by an orthogonal experiment and their luminescence performance

Luminescence ◽  
2021 ◽  
Author(s):  
Xiyue He ◽  
Wenxiang Li ◽  
Bijun Fang ◽  
Shuai Zhang ◽  
Xiaolong Lu ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Orthogonal Experiment ◽  
Synthesis Conditions ◽  
Luminescence Performance

Preparation of Silicalite-1 Membranes with Seeding Method and its Separation Performance for Low Ethanol/Water Mixture

2013 ◽  
Vol 807-809 ◽  
pp. 591-595
Author(s):  
Hong Liang Chen ◽  
Ji Song Yang ◽  
Yan Wang ◽  
Hui Ying Li ◽  
Xin Xin Li ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Separation Factor ◽  
High Performance ◽  
Separation Performance ◽  
Water Mixture ◽  
Synthesis Conditions ◽  
Seeding Method

High performance silicalite-1 membranes were successfully synthesized on silica tubes by seeding method after filling the tubes with water and glycerol mixtures. After seeding the silica tubes with 200 nm seeds, all the silicalite-1 membranes show acceptable separation performance towards ethanol/water mixture after 4-12 h hydrothermal synthesis, and the highest flux of membrane with 8 h hydrothermal synthesis reaches about 0.98 kg/m2.h and the separation factor reaches about 60 towards 3 wt.% ethanol/water mixture. This result shows that the as-synthesized silicalite-1 membrane can concentrate the ethanol from 3% to about 65%, and the ethanol can be obtained over 600 g/m2.h by using the silicalite-1 membrane, which shows that seeding method and suitable control of synthesis conditions is possible for preparing high-performance silicalite-1 membranes.

Preparation and characterization of a novel amphoteric polymer for oil well cementing with superior performances

2020 ◽  
Vol 29 (1) ◽  
pp. 29-39
Author(s):  
Tang Xin ◽  
Hu Xuzeng ◽  
Wan Haodong
Keyword(s):  
Thermal Stability ◽  
Orthogonal Experiment ◽  
Radical Copolymerization ◽  
Proton Nuclear Magnetic Resonance ◽  
Fluid Loss ◽  
Resonance Spectroscopy ◽  
Oil Well ◽  
Cement Slurry ◽  
Synthesis Conditions ◽  
Th 1

A novel amphoteric polymer TH-1 was synthesized using the monomers of 2-acrylamido-2-methylpropane sulfonic acid, acrylic acid, acrylamide, and cationic monomer through radical copolymerization as filtrate loss reducer in oil well cementing. Optimal synthesis conditions of TH-1 were obtained by an orthogonal experiment. The composition of copolymer (TH-1) was characterized by Fourier-transform infrared spectrum and proton nuclear magnetic resonance spectroscopy. The thermal stability of the synthesized copolymer was tested by thermogravimetric analysis. The fluid loss (FL) control and thickening performance of cement slurry incorporating TH-1 were evaluated at different temperatures. The filtration reduction mechanism of TH-1 was finally discussed. Results suggest that the amphoteric polymer is the target product polymerized by all the monomers, which presents excellent filtrate reduction property, high thermal stability, and strong saline tolerance under 200°C. The amphoteric polymer TH-1 includes cationic and anionic group in a molecule structure, which can adsorb firmly onto the surface of cement particles through electrostatic attraction and form adsorption membrane of viscoelastic polymer. In this way, compact cement filter cakes are formed, thereby efficiently reducing the FL.

The effect of reaction medium and hydrothermal synthesis conditions on morphological parameters and thermal behavior of calcium phosphate nanoparticles

2021 ◽  
Vol 47 (2) ◽  
pp. 2809-2821 ◽  
Author(s):  
Evgeniya A. Syukkalova ◽  
Anastasia V. Sadetskaya ◽  
Natalya D. Demidova ◽  
Natalia P. Bobrysheva ◽  
Mikhail G. Osmolowsky ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Calcium Phosphate ◽  
Thermal Behavior ◽  
Reaction Medium ◽  
Morphological Parameters ◽  
Synthesis Conditions ◽  
Calcium Phosphate Nanoparticles

scholarly journals Adjusting the Magnetic Properties of ZrO2:Mn Nanocrystals by Changing Hydrothermal Synthesis Conditions

2018 ◽  
Vol 4 (2) ◽  
pp. 28 ◽  
Author(s):  
Izabela Kuryliszyn-Kudelska ◽  
Witold Dobrowolski ◽  
Monika Arciszewska ◽  
Artur Małolepszy ◽  
Leszek Stobinski ◽  
...  
Keyword(s):  
Magnetic Properties ◽  
Hydrothermal Synthesis ◽  
Synthesis Conditions

Synthesis and characterization of the lead borate Pb6B12O21(OH)6

2016 ◽  
Vol 71 (8) ◽  
pp. 925-933 ◽  
Author(s):  
Sandra Schönegger ◽  
Teresa S. Ortner ◽  
Klaus Wurst ◽  
Gunter Heymann ◽  
Hubert Huppertz
Keyword(s):  
Crystal Structure ◽  
Hydrothermal Synthesis ◽  
Potassium Nitrate ◽  
Lattice Parameters ◽  
Synthesis And Characterization ◽  
Lead Borate ◽  
Hydrothermal Conditions ◽  
Organic Reagents ◽  
Synthesis Conditions

AbstractA lead borate with the composition Pb6B12O21(OH)6 was synthesized through a hydrothermal synthesis, using lead metaborate in combination with sodium nitrate and potassium nitrate. The compound crystallizes in the trigonal, non-centrosymmetric space group P32 (no. 145) with the lattice parameters a = 1176.0(4), c = 1333.0(4) pm, and V = 0.1596(2) nm3. Interestingly, the data of Pb6B12O21(OH)6 correct the structure of a literature known lead borate with the composition “Pb6B11O18(OH)9”. For the latter compound, nearly identical lattice parameters of a = 1176.91(7) and c = 1333.62(12) pm were reported, possessing a crystal structure, in which the localization and refinement of one boron atom was obviously overlooked. The structure of Pb6B12O21(OH)6 is built up from trigonal planar BO3 and tetrahedral BO4 groups forming complex chains. The Pb2+ cations are located between neighboring polyborate chains. The here reported compound Pb6B12O21(OH)6 and “Pb6B11O18(OH)9” were, however, produced under different synthesis conditions. While “Pb6B11O18(OH)9” was synthesized via a hydrothermal synthesis including ethylenediamine and acetic acid, the here reported lead borate Pb6B12O21(OH)6 could be obtained under moderate hydrothermal conditions (240°C) without the addition of organic reagents.

Influence of hydrothermal synthesis conditions on size, morphology and colloidal properties of Hematite nanoparticles

2015 ◽  
Vol 2 ◽  
pp. 19-27 ◽  
Author(s):  
Claudio Colombo ◽  
Giuseppe Palumbo ◽  
Erika Di Iorio ◽  
Xin Song ◽  
Zhaoxia Jiang ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Hematite Nanoparticles ◽  
Synthesis Conditions ◽  
Colloidal Properties
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