scholarly journals CeO2/CuO/3DOM SiO2 Catalysts with Very High Efficiency and Stability for CO Oxidation

2021 ◽  
Author(s):  
Chao Miao ◽  
Lingling Zhang ◽  
Weimin Xie ◽  
Lixing Liang ◽  
Shumei Chen ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
High Efficiency ◽  
Composite Catalyst ◽  
Co Conversion ◽  
Ordered Macroporous ◽  
Very High

Based on the urgent need for high active and stabile catalyst for CO conversion at low temperature, a CeO2/CuO/SiO2 ordered macroporous composite catalyst with 3DOM structure was prepared. The 3DOM...

Highly active and stable Au@CuxO core–shell nanoparticles supported on alumina for carbon monoxide oxidation at low temperature

RSC Advances ◽  
2016 ◽  
Vol 6 (79) ◽  
pp. 75126-75132 ◽  
Author(s):  
Weining Zhang ◽  
Qingguo Zhao ◽  
Xiaohong Wang ◽  
Xiaoxia Yan ◽  
Sheng Han ◽  
...  
Keyword(s):  
Carbon Monoxide ◽  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
Room Temperature ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Highly Active ◽  
Co Conversion ◽  
Core Shell Nanoparticles

Au@CuxO core–shell nanoparticles and Au@CuxO/Al2O3 used for CO oxidation at low temperature are prepared. CO conversion on Au@CuxO/Al2O3 can reach to 38% at room temperature and the catalytic activity remains unchanged after 108 hours reaction.

Charaterization and Catalytic Activity of CuO and NiO Supported on ZrO2 for CO Low Temperature Oxidation

2013 ◽  
Vol 842 ◽  
pp. 237-241 ◽  
Author(s):  
Zhi Chen ◽  
Yi Long Xie ◽  
Jin Xing Qiu ◽  
Zhong He Chen
Keyword(s):  
Catalytic Activity ◽  
Low Temperature ◽  
Co Oxidation ◽  
High Activity ◽  
Conversion Efficiency ◽  
Sol Gel ◽  
Coprecipitation Method ◽  
Low Temperature Oxidation ◽  
Temperature Oxidation ◽  
Co Conversion

ZrO2 support has been prepared by sol-gel and coprecipitation method. CuO and NiO were supported on the supports and they were the activity metals for the catalysts. The CO conversion was tested. The light-off temperature of CO oxidation was 22°C and CO conversion efficiency was up to 50% at 169°C. The prepared catalysts of Cu, Ni supported on ZrO2-A had a high activity for CO oxidation at low temperature.

Facile synthesis of meso-structured Pd/FeOx and its highly catalytic performance for low temperature CO oxidation under ambient conditions

RSC Advances ◽  
2015 ◽  
Vol 5 (27) ◽  
pp. 20650-20655 ◽  
Author(s):  
Liang Li ◽  
Gengnan Li ◽  
Yuan Yuan ◽  
Yongsheng Li
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Catalytic Performance ◽  
Ambient Condition ◽  
Ambient Conditions ◽  
Facile Synthesis ◽  
Co Conversion ◽  
Low Temperature Co Oxidation ◽  
Oxidation Properties

Meso-structured Pd/FeOx material exhibit excellent low temperature CO oxidation properties under ambient condition. Complete CO conversion could be achieved at as low as 0 °C, when 2.5 vol% H2O was introduced into the feed gas.

scholarly journals UV Light Induced Thermoluminescence of Rare Earth doped Nanomaterials Y\(_2\)O\(_3\):Eu\(^{3+}\), Gd\(_2\)O\(_3\):Eu\(^{3+}\) and Gd\(_2\)O\(_3\):Er\(^{3+}\)

2018 ◽  
Vol 28 (1) ◽  
pp. 75 ◽  
Author(s):  
Nguyen Thi Quy Hai ◽  
Tran Kim Anh ◽  
Vu Thi Thai Ha ◽  
Pham Thi Minh Chau ◽  
Ho Van Tuyen ◽  
...  
Keyword(s):  
Rare Earth ◽  
Low Temperature ◽  
High Efficiency ◽  
Uv Light ◽  
Combustion Method ◽  
Gel Combustion ◽  
Doped Nanomaterials ◽  
Gel Combustion Method ◽  
Rare Earth Doped ◽  
Very High

Thermoluminescence  properties of ultraviolet irradiated Y2O3:Eu3+, Gd2O3:Eu3+ and Gd2O3:Er3+ nanophosphors have been reported. The materials were synthesized by gel- combustion method with EDTA- Na2 as organic agent. This method allows production of very fine white powder at low temperature with very high efficiency. XRD has been studied to determine the structure of the prepared nano powders. The obtained materials exhibit sufficient sensibility to UV radiation and may be useful in UV light measurements.

A synthesis of high-efficiency Pd–Cu–Clx/Al2O3 catalyst for low temperature CO oxidation

2010 ◽  
Vol 46 (44) ◽  
pp. 8433 ◽  
Author(s):  
Yuexin Shen ◽  
Guanzhong Lu ◽  
Yun Guo ◽  
Yanqin Wang
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
High Efficiency ◽  
Low Temperature Co Oxidation ◽  
Al2o3 Catalyst

A novel flower-like Z-type heterojunction CuS/Bi7O9I3 composite catalyst prepared under mild conditions for degradation of antibiotics and sterilization under visible light

2020 ◽  
Vol 7 (10) ◽  
pp. 3074-3087
Author(s):  
Ruixiang Yang ◽  
Hongjuan Li ◽  
Yatao Wang ◽  
Zhijia Zhu ◽  
Chunyan Hu ◽  
...  
Keyword(s):  
Low Temperature ◽  
Visible Light ◽  
Photocatalytic Degradation ◽  
High Efficiency ◽  
Antibacterial Properties ◽  
Composite Catalyst ◽  
Mild Conditions

The Z-type heterojunction CuS/Bi7O9I3 composite catalyst prepared at low temperature has high-efficiency antibiotic photocatalytic degradation, photothermal synergy and antibacterial properties.

scholarly journals Near quantitative synthesis of urea macrocycles enabled by bulky N-substituent

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Yingfeng Yang ◽  
Hanze Ying ◽  
Zhixia Li ◽  
Jiang Wang ◽  
Yingying Chen ◽  
...  
Keyword(s):  
High Efficiency ◽  
Molecular Structures ◽  
High Yield ◽  
Kinetic Control ◽  
High Concentration ◽  
Weak Association ◽  
Quantitative Synthesis ◽  
Thermodynamic Stabilization ◽  
Discrete Structures ◽  
Very High

AbstractMacrocycles are unique molecular structures extensively used in the design of catalysts, therapeutics and supramolecular assemblies. Among all reactions reported to date, systems that can produce macrocycles in high yield under high reaction concentrations are rare. Here we report the use of dynamic hindered urea bond (HUB) for the construction of urea macrocycles with very high efficiency. Mixing of equal molar diisocyanate and hindered diamine leads to formation of macrocycles with discrete structures in nearly quantitative yields under high concentration of reactants. The bulky N-tert-butyl plays key roles to facilitate the formation of macrocycles, providing not only the kinetic control due to the formation of the cyclization-promoting cis C = O/tert-butyl conformation, but also possibly the thermodynamic stabilization of macrocycles with weak association interactions. The bulky N-tert-butyl can be readily removed by acid to eliminate the dynamicity of HUB and stabilize the macrocycle structures.

Pt and Ir supported on mixed Ce0.97Ru0.03O2 oxide as low-temperature CO oxidation catalysts

2021 ◽  
Author(s):  
R. Rangel ◽  
E. González-A ◽  
A. Solís-García ◽  
T.A. Zepeda ◽  
D.H. Galván ◽  
...  
Keyword(s):  
Low Temperature ◽  
Co Oxidation ◽  
Oxidation Catalysts ◽  
Low Temperature Co Oxidation
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