scholarly journals Thermodynamic Simulation of Components’ Content in MoS2Hydrothermal Reaction System and Oxygen–Doped MoS2One-Step Hydrothermal Preparation Method

2018 ◽  
Vol 381 ◽  
pp. 012021
Author(s):  
Guangtong Zhou ◽  
Hanjian Li ◽  
Xiangbin Zeng ◽  
Wenzhao Wang ◽  
Yishuo Hu ◽  
...  
Keyword(s):  
Preparation Method ◽  
Thermodynamic Simulation ◽  
Reaction System ◽  
Hydrothermal Preparation

Cu SAPO 34 One Pot Hydrothermal Preparation Method for Particular Copper Configuration

2018 ◽  
Vol 62 (1-4) ◽  
pp. 63-71 ◽  
Author(s):  
Guillaume Pétaud ◽  
Sonia Gil ◽  
Anne Giroir Fendler
Keyword(s):  
Preparation Method ◽  
Hydrothermal Preparation ◽  
One Pot

Green Preparation of an Environment-Responsive Polymer

2013 ◽  
Vol 750-752 ◽  
pp. 1235-1238
Author(s):  
Qian Hou ◽  
Zhao Zhang ◽  
Ting Ting Yang ◽  
Yan Zhang
Keyword(s):  
Preparation Method ◽  
Reaction System ◽  
Functional Materials ◽  
Transformation Property ◽  
Solution Temperature ◽  
Smart Polymers ◽  
Critical Solution Temperature ◽  
Isopropyl Acrylamide ◽  
Responsive Polymer ◽  
Chemical Constitution

Smart polymers are very important in many fields, such as biochemistry, fine chemicals and functional materials, etc. In this paper, poly (N-isopropyl acrylamide) (PNIPAm) was prepared by ultrasonics sonochemistry. In the reaction system, the monomer is N-isopropyl acrylamide (NIPAm), the crosslinker is N,N'-methylenebisacrylamide (BIS) and the solvent is tetrahydrofuran (THF). FTIR and UV-Vis were used to investigate the chemical constitution and phase transformation property of PNIPAm. The results show that it is successful to obtain PNIPAm. It has thermosensitivity. And its lower critical solution temperature is found to be 34°C. Therefore, a green preparation method for environment-responsive polymer is presented.

Shape-Controlled CeO2 Nanomaterials Prepared by Hydrothermal Process

2013 ◽  
Vol 331 ◽  
pp. 513-521 ◽  
Author(s):  
Yu Tao ◽  
Yu Xiao Tao ◽  
Zhong Huai Su ◽  
Hai Ping Wu
Keyword(s):  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Large Scale ◽  
Preparation Method ◽  
Hydrothermal Process ◽  
Reaction System ◽  
Simple Hydrothermal Method ◽  
Large Scale Preparation ◽  
Scale Preparation ◽  
Shape Controlled

A simple hydrothermal method was developed to prepare shaped-controlled CeO2 nanomaterials, in which, Ce (NO3)3· 6H2O was used as Ce source and H2O2 was used as oxidant and morphologies controlling agent. Different morphologies of CeO2 including nanoparticles, nanooctahedrons, nanorods and nanocubes could be obtained by simply adjusting the concentration of H2O2 in reaction system. These nanoCeO2 could be dispersed in water and ethanol very well after reaction without using any surfactant. A possible growth mechanism was put forward to explain the morphologies evolution process based on TEM, SEM observations. There are not any other impurities were introduced into reaction, and the production ration is high enough, which supply a potential large-scale preparation method for CeO2 nanomaterials.

Low temperature hydrothermal synthesis, structure and magnetic properties of RECrO3 (RE = La, Pr, Nd, Sm)

2015 ◽  
Vol 44 (39) ◽  
pp. 17201-17208 ◽  
Author(s):  
Shan Wang ◽  
Keke Huang ◽  
Changmin Hou ◽  
Long Yuan ◽  
Xiaofeng Wu ◽  
...  
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Magnetic Properties ◽  
Rare Earth ◽  
Hydrothermal Synthesis ◽  
Low Temperature ◽  
Perovskite Structure ◽  
Preparation Method ◽  
Hydrothermal Preparation

In this paper, the low temperature hydrothermal preparation method, crystal structure, Raman spectroscopy and magnetization of perovskite structure rare-earth chromites (RECrO3) were reported.

scholarly journals Research Progress in Ordered Nanomaterials via Magnetic Field Induced Preparation

2020 ◽  
Vol 218 ◽  
pp. 03029
Author(s):  
Yunhao Liu ◽  
Mingzhe Lv ◽  
Chao Wang ◽  
Zuyu He ◽  
Chuang Zhou ◽  
...  
Keyword(s):  
Magnetic Field ◽  
Self Assembly ◽  
Preparation Method ◽  
Reaction System ◽  
Research Direction ◽  
Research Progress ◽  
Future Research ◽  
Excellent Performance ◽  
Indirect Contact ◽  
Metal Nanomaterials

Ordered nanomaterials are widely concerned for their excellent performance in mechanics, electricity, optics and magnetism. Magnetic field induced self-assembly is widely used for the preparation of ordered nanomaterials, which has the advantages of indirect contact with the reaction system, controllable adjustment of magnetic field. By using this preparation method, it can realize the alignment of nanomaterials without affecting the comprehensive performance of each component in the system. In this paper, we reviewed magnetic field induced self-assembly of metal nanomaterials, oxide nanomaterials and nanocomposites. We also looked forward to the future research direction.

Direct Observation of Heat Exchanger Deposits by Cross Sectioning

1967 ◽  
Vol 25 ◽  
pp. 364-365
Author(s):  
R. W. Anderson ◽  
D. L. Senecal
Keyword(s):  
Electron Microscopy ◽  
Transmission Electron Microscopy ◽  
Heat Exchanger ◽  
Direct Observation ◽  
Cross Sections ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Flowing Water ◽  
Transmission Electron ◽  
Deposit Layer

A problem was presented to observe the packing densities of deposits of sub-micron corrosion product particles. The deposits were 5-100 mils thick and had formed on the inside surfaces of 3/8 inch diameter Zircaloy-2 heat exchanger tubes. The particles were iron oxides deposited from flowing water and consequently were only weakly bonded. Particular care was required during handling to preserve the original formations of the deposits. The specimen preparation method described below allowed direct observation of cross sections of the deposit layers by transmission electron microscopy.The specimens were short sections of the tubes (about 3 inches long) that were carefully cut from the systems. The insides of the tube sections were first coated with a thin layer of a fluid epoxy resin by dipping. This coating served to impregnate the deposit layer as well as to protect the layer if subsequent handling were required.

Scanning electron microscopy of human iliac bone by a simple preparation method

1990 ◽  
Vol 48 (3) ◽  
pp. 226-227
Author(s):  
Toshihiko Takita ◽  
Tomonori Naguro ◽  
Toshio Kameie ◽  
Akihiro Iino ◽  
Kichizo Yamamoto
Keyword(s):  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Preparation Method ◽  
Specimen Preparation ◽  
Real Surface ◽  
Public Attention ◽  
Preparation Methods ◽  
The Real ◽  
Simple Preparation ◽  
Scanning Electron

Recently with the increase in advanced age population, the osteoporosis becomes the object of public attention in the field of orthopedics. The surface topography of the bone by scanning electron microscopy (SEM) is one of the most useful means to study the bone metabolism, that is considered to make clear the mechanism of the osteoporosis. Until today many specimen preparation methods for SEM have been reported. They are roughly classified into two; the anorganic preparation and the simple preparation. The former is suitable for observing mineralization, but has the demerit that the real surface of the bone can not be observed and, moreover, the samples prepared by this method are extremely fragile especially in the case of osteoporosis. On the other hand, the latter has the merit that the real information of the bone surface can be obtained, though it is difficult to recognize the functional situation of the bone.

Hydrothermal preparation of TiO2-Ag nanoparticles and its antimicrobial performance against human pathogenic microbial cells in water

BIOCELL ◽  
2018 ◽  
Vol 42 (3) ◽  
pp. 93-97 ◽  
Author(s):  
Mahmoud MOUSTAFA ◽  
Saad ALAMRI ◽  
Mohamed ELNOUBY ◽  
Tarek TAHA ◽  
M. A. ABU-SAIED ◽  
...  
Keyword(s):  
Ag Nanoparticles ◽  
Hydrothermal Preparation ◽  
Microbial Cells ◽  
Antimicrobial Performance

The solubility of calcium carbonate  in green liquor handling systems

TAPPI Journal ◽  
2019 ◽  
Vol 18 (10) ◽  
pp. 595-602
Author(s):  
ALISHA GIGLIO ◽  
VLADIMIROS G. PAPANGELAKIS ◽  
HONGHI TRAN
Keyword(s):  
Calcium Carbonate ◽  
Systematic Study ◽  
Kraft Pulp ◽  
Thermodynamic Simulation ◽  
Solubility Data ◽  
Pulp Mills ◽  
Persistent Problem ◽  
Green Liquor ◽  
Kraft Pulp Mills ◽  
Salt Systems

The formation of hard calcite (CaCO3) scale in green liquor handling systems is a persistent problem in many kraft pulp mills. CaCO3 precipitates when its concentration in the green liquor exceeds its solubility. While the solubility of CaCO3 in water is well known, it is not so in the highly alkaline green liquor environment. A systematic study was conducted to determine the solubility of CaCO3 in green liquor as a function of temperature, total titratable alkali (TTA), causticity, and sulfidity. The results show that the solubility increases with increased temperature, increased TTA, decreased causticity, and decreased sulfidity. The new solubility data was incorporated into OLI (a thermodynamic simulation program for aqueous salt systems) to generate a series of CaCO3 solubility curves for various green liquor conditions. The results help explain how calcite scale forms in green liquor handling systems.

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