scholarly journals Publisher Correction: Switching of metal–oxygen hybridization for selective CO2 electrohydrogenation under mild temperature and pressure

2021 ◽  
Author(s):  
Meng Li ◽  
Bin Hua ◽  
Lu-Cun Wang ◽  
Joshua D. Sugar ◽  
Wei Wu ◽  
...  
Keyword(s):  
Temperature And Pressure ◽  
Mild Temperature

Hydrothermal Sintering under Mild Temperature Conditions: Preparation of Calcium-deficient Hydroxyapatite Compacts

2010 ◽  
Vol 65 (8) ◽  
pp. 1038-1044 ◽  
Author(s):  
Kazumichi Yanagisawa ◽  
Jae-Hyen Kim ◽  
Chisato Sakata ◽  
Ayumu Onda ◽  
Eri Sasabe ◽  
...  
Keyword(s):  
Reaction Time ◽  
Reaction Temperature ◽  
Hot Pressing ◽  
Reaction Parameter ◽  
High Bulk Density ◽  
Temperature And Pressure ◽  
Mild Temperature ◽  
Short Time ◽  
High Bulk ◽  
Dissolution And Precipitation

Calcium-deficient hydroxyapatite (CDHA) prepared by the coprecipitation method was solidified by the hydrothermal hot-pressing technique, and compacts of CDHA with high bulk density beyond 80% were obtained at 200 ℃. Each reaction parameter, viz. reaction temperature, pressure, and time, was systematically changed from the standard conditions to investigate its effects on density, Vickers hardness, and Ca/P ratio of the compacts obtained. The reaction temperature and pressure had a large effect on densification, but not the reaction time because the densification proceeds in a short time. The densification by hydrothermal hot-pressing involved dissolution and precipitation of the starting CDHA powder, so that the Ca/P ratio changed from 1.52 of the starting powders to 1.61 of the compact obtained by hydrothermal hot-pressing at 200 ℃ and 35 MPa for 24 h with the addition of 10 wt.-% water

Synthesis and Characterization of CoFe2O4 Nanoparticles by Glycothermal Process

2007 ◽  
Vol 544-545 ◽  
pp. 865-868 ◽  
Author(s):  
Chil Soon Lee ◽  
Dong Sik Bae
Keyword(s):  
Room Temperature ◽  
Cofe2o4 Nanoparticles ◽  
Synthesis Parameters ◽  
Metal Nitrates ◽  
Temperature And Pressure ◽  
Starting Solutions ◽  
Average Size ◽  
Glycol Solution ◽  
Mild Temperature

CoFe2O4 nanoparticles were prepared in ethylene glycol solution under mild temperature and pressure conditions by precipitation from metal nitrates. The average size of the synthesized CoFe2O4 nanoparticles was in the range of 5 to 10, and they were narrowly distributed in the crystalline phase. Their magnetic property was of superparamagnetic character at room temperature. The effect of synthesis parameters is discussed such as the pH of starting solutions and reaction temperature.

Fabrication and Characterization of Barium Doped Ceria Nanopowders by a Solvothermal Processing

2016 ◽  
Vol 868 ◽  
pp. 84-88
Author(s):  
Dae Han Lee ◽  
Dong Sik Bae
Keyword(s):  
Ammonium Hydroxide ◽  
Cubic Phase ◽  
Solvent Ratio ◽  
Solution Ph ◽  
Starting Solution ◽  
Metal Nitrates ◽  
Temperature And Pressure ◽  
Average Size ◽  
Mild Temperature

Ba doped CeO2 nanopowders were prepared under mild temperature and pressure conditions by precipitation from metal nitrates with aqueous ammonium hydroxide. Spherical Ba doped CeO2 nanopowders were obtained with reaction at the temperature range of 210°C to 230°C for 6 h. The average size of the synthesized Ba doped CeO2 powders were below 10 nm and its distribution was narrow. The XRD pattern showed that the synthesized Ba doped CeO2 powders were crystalline with cubic phase of CeO2. This study has shown that the synthesis of Ba doped CeO2 nanopowders is possible under mild temperature and pressure conditions in ethylene gylcol solution. The effects of synthesis parameters, such as the solvent ratio of starting solution, pH of starting solution, reaction temperature and time, are discussed.

Synthesis and Characterization of Nanosized ZnxMn1-xFe2O4 Powders by Glycothermal Process

2005 ◽  
Vol 486-487 ◽  
pp. 436-439 ◽  
Author(s):  
Dong Sik Bae ◽  
Eun Jung Kim ◽  
Sang Whan Park ◽  
Kyong Sop Han
Keyword(s):  
Magnetic Property ◽  
Ethylene Glycol ◽  
Room Temperature ◽  
Synthesis And Characterization ◽  
Metal Nitrates ◽  
Temperature And Pressure ◽  
Average Size ◽  
Glycol Solution ◽  
Mild Temperature

Nanosized ZnxMn1-xFe2O4 powders were prepared in ethylene glycol solution under mild temperature and pressure conditions by precipitation from metal nitrates. The average size and distribution of the synthesized ZnxMn1-xFe2O4 powders were 10- 20 ㎚ and narrow, respectively. The magnetic property of the synthesized ZnxMn1- xFe2O4 powder was of superparamagnetic character at room temperature.

Ammonia production using iron nitride and water as hydrogen source under mild temperature and pressure

2021 ◽  
Vol 46 (18) ◽  
pp. 10642-10652
Author(s):  
Hiromi Eba ◽  
Yuki Masuzoe ◽  
Toru Sugihara ◽  
Hayao Yagi ◽  
Tian Liu
Keyword(s):  
Iron Nitride ◽  
Ammonia Production ◽  
Temperature And Pressure ◽  
Mild Temperature

Switching of metal–oxygen hybridization for selective CO2 electrohydrogenation under mild temperature and pressure

2021 ◽  
Author(s):  
Meng Li ◽  
Bin Hua ◽  
Lu-Cun Wang ◽  
Joshua D. Sugar ◽  
Wei Wu ◽  
...  
Keyword(s):  
Temperature And Pressure ◽  
Mild Temperature

scholarly journals Modeling of Fenton Reaction for the Oxidation of Phenol in Water

2005 ◽  
Vol 2005 (2) ◽  
pp. 31-36 ◽  
Author(s):  
Olivier Chedeville ◽  
Ayse Tosun-Bayraktar ◽  
Catherine Porte
Keyword(s):  
Industrial Wastewater ◽  
Fenton Reaction ◽  
Concentration Ratio ◽  
Strong Influence ◽  
Organic Pollutant ◽  
Phenol Concentration ◽  
Molar Ratio ◽  
Bactericidal Properties ◽  
Temperature And Pressure ◽  
Mild Temperature

Phenol is an organic pollutant found in various types of industrial wastewater. Due to its bactericidal properties, it is difficult to eliminate it by classic treatment methods. In this work, the degradation of this compound by Fenton reaction at mild temperature and pressure conditions is studied. An experimental design was applied in order to quantify the influence of operating parameters on the efficiency of this method. The field of study was defined between 20 and 50°C for the temperature, 1 and 4 g L−1for the phenol concentration, 10 and 28 for the H2O2to phenol molar ratio, and 0.02 to 0.08 for the Fe(II) to phenol concentration ratio. It was shown that the temperature and the amount of catalyst have a strong influence. A model giving the decrease of COD was established. The COD decrease was between 40% and 72% and phenol had totally disappeared.

Synthesis and Characterization of Nanosized ITO Powders by Glycothermal Processing

2005 ◽  
Vol 486-487 ◽  
pp. 440-443
Author(s):  
Dong Sik Bae ◽  
Hye Kyoung Kim ◽  
Rak Hee Kim ◽  
Jae Won Kim ◽  
Je Hyun Lee ◽  
...  
Keyword(s):  
Indium Tin Oxide ◽  
Potassium Hydroxide ◽  
Oxide Powders ◽  
Metal Nitrates ◽  
Aqueous Potassium Hydroxide ◽  
Temperature And Pressure ◽  
Average Size ◽  
Glycol Solution ◽  
Mild Temperature

Nanosized ITO(indium tin oxide) powders were prepared in ethylene glycol solution under mild temperature and pressure conditions by precipitation from metal nitrates with aqueous potassium hydroxide. The average size and distribution of the synthesized ITO powders were about 20 ㎚ and broad, respectively. The phase of synthesized particles was crystalline reacted at 230 0C for 6 h.. The optical properties of the synthesized ITO powders were transparent.

Heat-Etching with a Bullivant Type II Simple Freeze-Cleave Device

1970 ◽  
Vol 28 ◽  
pp. 106-107 ◽  
Author(s):  
Ronald S. Weinstein ◽  
N. Scott McNutt
Keyword(s):  
New Zealand ◽  
General Hospital ◽  
Massachusetts General Hospital ◽  
Type I ◽  
Type Ii ◽  
Collaborative Effort ◽  
Temperature And Pressure ◽  
The University

The Type I simple cold block device was described by Bullivant and Ames in 1966 and represented the product of the first successful effort to simplify the equipment required to do sophisticated freeze-cleave techniques. Bullivant, Weinstein and Someda described the Type II device which is a modification of the Type I device and was developed as a collaborative effort at the Massachusetts General Hospital and the University of Auckland, New Zealand. The modifications reduced specimen contamination and provided controlled specimen warming for heat-etching of fracture faces. We have now tested the Mass. General Hospital version of the Type II device (called the “Type II-MGH device”) on a wide variety of biological specimens and have established temperature and pressure curves for routine heat-etching with the device.

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