scholarly journals Novel iron doped calcium oxalates as promising heterogeneous catalysts for one-pot multi-component synthesis of pyranopyrazoles

RSC Advances ◽  
2017 ◽  
Vol 7 (1) ◽  
pp. 423-432 ◽  
Author(s):  
Kranthi Kumar Gangu ◽  
Suresh Maddila ◽  
Surya Narayana Maddila ◽  
Sreekantha B. Jonnalagadda
Keyword(s):  
Glutamic Acid ◽  
Heterogeneous Catalysts ◽  
Precipitation Method ◽  
One Pot ◽  
Surface Modifier ◽  
Calcium Oxalates ◽  
Iron Doped ◽  
Co Precipitation

The co-precipitation method using a surface modifier, glutamic acid was employed in the design of iron doped calcium oxalates (Fe-CaOx).

scholarly journals Preparation of Metal Oxides Containing ppm Levels of Pd as Catalysts for the Reduction of Nitroarene and Evaluation of Their Catalytic Activity by the Fluorescence-Based High-Throughput Screening Method

Catalysts ◽  
2020 ◽  
Vol 10 (5) ◽  
pp. 542
Author(s):  
Taeho Lim ◽  
Min Su Han
Keyword(s):  
Catalytic Activity ◽  
Metal Oxides ◽  
High Throughput ◽  
High Throughput Screening ◽  
Screening Method ◽  
Reduction Reaction ◽  
Precipitation Method ◽  
Reaction Conditions ◽  
One Pot ◽  
Co Precipitation

Herein, an easily accessible and efficient green method for the reduction of nitroarene compounds was developed using metal oxide catalysts. Heterogeneous metal oxides with or without Pd were prepared by a simple and scalable co-precipitation method and used for the reduction of nitroarenes. A fluorescence-based high-throughput screening (HTS) method was also developed for the rapid analysis of the reaction conditions. The catalytic activity of the metal oxides and reaction conditions were rapidly screened by the fluorescence-based HTS method, and Pd/CuO showed the highest catalytic activity under mild reaction conditions. After identifying the optimal reaction conditions, various nitroarenes were reduced to the corresponding aniline derivatives by Pd/CuO (0.005 mol% of Pd) under these conditions. Furthermore, the Pd/CuO catalyst was used for the one-pot Suzuki–Miyaura cross-coupling/reduction reaction. A gram-scale reaction (20 mmol) was successfully performed using the present method, and Pd/CuO showed high reusability without a loss of catalytic activity for five cycles.

Synthesis and Fluorescence Properties of Water-Soluble L-Cysteine-Modified ZnSe:Ag Quantum Dots

2014 ◽  
Vol 1033-1034 ◽  
pp. 1172-1175
Author(s):  
Li Ping Lin ◽  
Feng Hua Huang ◽  
Pei Feng Chen
Keyword(s):  
Crystal Structure ◽  
Quantum Dots ◽  
Optical Properties ◽  
Absorption Spectrum ◽  
Photoluminescence Spectrum ◽  
Water Soluble ◽  
Precipitation Method ◽  
X Ray ◽  
Surface Modifier ◽  
Co Precipitation

The water-soluble ZnSe:Ag quantum dots were synthesized in aqueous medium by chemical co-precipitation method with L-cysteine as surface modifier. The crystal structure and optical properties of the obtained ZnSe:Ag quantum dots have been characterized by X-ray power diffraction, infrared spectrum, UV-Vis absorption spectrum and photoluminescence spectrum. Results indicate that ZnSe:Ag quantum dots belong to the cubic blende structure and have good fluorescent characteristics. The L-cysteine modified on the surface of ZnSe:Ag quantum dots renders the quantum dots water-soluble, biocompatible.

Long-cycled Li2ZnTi3O8/TiO2 composite anode material synthesized via a one-pot co-precipitation method for lithium ion batteries

2017 ◽  
Vol 41 (3) ◽  
pp. 975-981 ◽  
Author(s):  
Hua Li ◽  
Zhoufu Li ◽  
Yanhui Cui ◽  
Chenxiang Ma ◽  
Zhiyuan Tang
Keyword(s):  
Lithium Ion Batteries ◽  
Anode Material ◽  
Anode Materials ◽  
Lithium Ion ◽  
Precipitation Method ◽  
Electrochemical Performances ◽  
Composite Anode ◽  
One Pot ◽  
Co Precipitation

Li2ZnTi3O8 and Li2ZnTi3O8/TiO2 anode materials were synthesized via a co-precipitation method and displayed excellent electrochemical performances.

Catalytic amination of diethylene glycol with tertiarybutylamine over Ni–Al2O3 catalysts with different Ni/Al ratios

RSC Advances ◽  
2016 ◽  
Vol 6 (104) ◽  
pp. 102373-102380 ◽  
Author(s):  
Dongdong Cheng ◽  
Zhenlu Wang ◽  
Yanyang Xia ◽  
Yumeng Wang ◽  
Wenxiang Zhang ◽  
...  
Keyword(s):  
Diethylene Glycol ◽  
Heterogeneous Catalysts ◽  
Precipitation Method ◽  
Catalytic Amination ◽  
Co Precipitation

The catalytic amination of diethylene glycol (DEG) with tertiarybutylamine (TBA) to tertiarybutylaminoethoxyethanol (TBEE) was investigated on Ni–Al2O3 heterogeneous catalysts that were prepared using the co-precipitation method.

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