Facile alkali-assisted synthesis of g-C3N4 materials and their high-performance catalytic application in solvent-free cycloaddition of CO2 to epoxides

RSC Advances ◽  
2016 ◽  
Vol 6 (60) ◽  
pp. 55382-55392 ◽  
Author(s):  
Jie Xu ◽  
Jie-Kun Shang ◽  
Quan Jiang ◽  
Yue Wang ◽  
Yong-Xin Li
Keyword(s):  
High Performance ◽  
Alkali Treatment ◽  
Solvent Free ◽  
Catalytic Activities ◽  
Catalytic Application

g-C3N4 materials have been prepared at lower temperatures (450–475 °C) by the aid of alkali treatment. In cycloaddition of CO2 to epoxides, the g-C3N4 materials demonstrated high and stable catalytic activities.

scholarly journals Design of a New Gemini Lipoaminoacid with Immobilized Lipases Based on an Eco-Friendly Biosynthetic Process

Catalysts ◽  
2021 ◽  
Vol 11 (2) ◽  
pp. 164
Author(s):  
Patrícia M. Carvalho ◽  
Rita C. Guedes ◽  
Maria R. Bronze ◽  
Célia M. C. Faustino ◽  
Maria H. L. Ribeiro
Keyword(s):  
High Performance ◽  
Transfection Efficiency ◽  
Sol Gel ◽  
Reaction Rates ◽  
Solvent Free ◽  
Bioactive Molecules ◽  
Thermomyces Lanuginosus ◽  
Chemical Production ◽  
Immobilized Lipases ◽  
Free Media

Lipoaminoacids (LAA) are an important group of biosurfactants, formed by a polar hydrophilic part (amino acid) and a hydrophobic tail (lipid). The gemini LAA structures allow the formation of a supramolecular complex with bioactive molecules, like DNA, which provides them with good transfection efficiency. Since lipases are naturally involved in lipid and protein metabolism, they are an alternative to the chemical production of LAA, offering an eco-friendly biosynthetic process option. This work aimed to design the production of novel cystine derived gemini through a bioconversion system using immobilized lipases. Three lipases were used: porcine pancreatic lipase (PPL); lipase from Thermomyces lanuginosus (TLL); and lipase from Rizhomucor miehei (RML). PPL was immobilized in sol-gel lenses. L-cystine dihydrochloride and dodecylamine were used as substrates for the bioreaction. The production of LAA was evaluated by thin layer chromatography (TLC), and colorimetric reaction with eosin. The identification and quantification was carried out by High Performance Liquid Chromatographer-Mass Spectrometry (HPLC-MS/MS). The optimization of media design included co-solvent (methanol, dimethylsulfoxide), biphasic (n-hexane and 2-propanol) or solvent-free media, in order to improve the biocatalytic reaction rates and yields. Moreover, a new medium was tested where dodecylamine was melted and added to the cystine and to the biocatalyst, building a system of mainly undissolved substrates, leading to 5 mg/mL of LAA. Most of the volume turned into foam, which indicated the production of the biosurfactant. For the first time, the gemini derived cystine lipoaminoacid was produced, identified, and quantified in both co-solvent and solvent-free media, with the lipases PPL, RML, and TLL.

A wafer-scale antireflective protection layer of solution-processed TiO2 nanorods for high performance silicon-based water splitting photocathodes

2016 ◽  
Vol 4 (24) ◽  
pp. 9477-9485 ◽  
Author(s):  
Dinsefa M. Andoshe ◽  
Seokhoon Choi ◽  
Young-Seok Shim ◽  
Seung Hee Lee ◽  
Yoonkoo Kim ◽  
...  
Keyword(s):  
Water Splitting ◽  
High Performance ◽  
Tio2 Nanorods ◽  
Solution Processed ◽  
Solar Water ◽  
Catalytic Activities ◽  
Solar Water Splitting ◽  
Protection Layer ◽  
Silicon Based ◽  
Protection From Corrosion

TiO2 NRs which have a multi-function tasks such as protection from corrosion, antireflection and catalytic activities were grown in a 4-inch silicon for silicon-based solar water splitting.

scholarly journals Sandwich type polyoxometalates encapsulated into the mesoporous material: synthesis, characterization and catalytic application in the selective oxidation of sulfides

RSC Advances ◽  
2018 ◽  
Vol 8 (49) ◽  
pp. 28249-28260 ◽  
Author(s):  
Elham Naseri ◽  
Roushan Khoshnavazi
Keyword(s):  
Selective Oxidation ◽  
Mesoporous Material ◽  
Room Temperature ◽  
Material Synthesis ◽  
Catalytic Activities ◽  
Oxidation Of Sulfides ◽  
Catalytic Application ◽  
Sandwich Type ◽  
First Time ◽  
Sandwich Type Polyoxometalates

The A-type sandwich POMs of [(HOSnIVOH)3(PW9O34)2]12– (P2W18Sn3) and [(OCeIVO)3(PW9O34)2]12– (P2W18Ce3) were immobilized for the first time into the porous MIL-101 MOF. Their catalytic activities were examined in the oxidation of sulfides to sulfones at room temperature.

Two new calix[4]resorcinarene-based coordination cages adjusted by metal ions for the Knoevenagel condensation reaction

2021 ◽  
Author(s):  
Wen-Yuan Pei ◽  
Bing-Bing Lu ◽  
Jin Yang ◽  
Tianqi Wang ◽  
Jian-Fang Ma
Keyword(s):  
Metal Ions ◽  
Knoevenagel Condensation ◽  
Condensation Reaction ◽  
Solvent Free ◽  
Catalytic Activities ◽  
Solvent Free Conditions ◽  
Coordination Cages ◽  
Knoevenagel Condensation Reaction

Two new calix[4]resorcinarene-based metal-coordinated cages have been synthesized through tuning metal ions, where they featured catalytic activities for the Knoevenagel condensation reaction under solvent-free conditions.

scholarly journals Solvent-free production of carbon materials with developed pore structure from biomass for high-performance supercapacitors

2020 ◽  
Vol 150 ◽  
pp. 112384 ◽  
Author(s):  
Lang Huang ◽  
Qiong Wu ◽  
Shouxin Liu ◽  
Shitao Yu ◽  
Arthur J. Ragauskas
Keyword(s):  
Pore Structure ◽  
High Performance ◽  
Carbon Materials ◽  
Solvent Free

scholarly journals A comparative study between Cu(INA)2-MOF and [Cu(INA)2(H2O)4] complex for a click reaction and the Biginelli reaction under solvent-free conditions

RSC Advances ◽  
2020 ◽  
Vol 10 (6) ◽  
pp. 3407-3415 ◽  
Author(s):  
Julia C. Mansano Willig ◽  
Gustavo Granetto ◽  
Danielly Reginato ◽  
Felipe R. Dutra ◽  
Érica Fernanda Poruczinski ◽  
...  
Keyword(s):  
Comparative Study ◽  
Click Reaction ◽  
Biginelli Reaction ◽  
Solvent Free ◽  
Catalytic Application ◽  
Solvent Free Conditions ◽  
Biginelli Reactions

The catalytic application of Cu(INA)2-MOF in click and Biginelli reactions was investigated and a comparative study with the [Cu(INA)2(H2O)4] complex was performed.

scholarly journals Hierarchical Micro/Mesoporous Carbons Synthesized with a ZnO Template and Petroleum Pitch via a Solvent-Free Process for a High-Performance Supercapacitor

ACS Omega ◽  
2017 ◽  
Vol 2 (5) ◽  
pp. 2106-2113 ◽  
Author(s):  
Guan-Wen Liu ◽  
Tsung-Yi Chen ◽  
Cheng-Han Chung ◽  
Hong-Ping Lin ◽  
Chun-Han Hsu
Keyword(s):  
High Performance ◽  
Solvent Free ◽  
Petroleum Pitch ◽  
Mesoporous Carbons ◽  
Free Process
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