scholarly journals Aging amorphous/crystalline heterophase PdCu nanosheets for catalytic reactions

2019 ◽  
Vol 6 (5) ◽  
pp. 955-961 ◽  
Author(s):  
Hongfei Cheng ◽  
Nailiang Yang ◽  
Xiaozhi Liu ◽  
Qinbai Yun ◽  
Min Hao Goh ◽  
...  
Keyword(s):  
Amorphous Phase ◽  
Crystalline Phase ◽  
Aging Effect ◽  
Proof Of Concept ◽  
One Pot ◽  
Future Studies ◽  
Wet Chemical Synthesis ◽  
Wet Chemical ◽  
The One ◽  
Phase Engineering

ABSTRACT Phase engineering is arising as an attractive strategy to tune the properties and functionalities of nanomaterials. In particular, amorphous/crystalline heterophase nanostructures have exhibited some intriguing properties. Herein, the one-pot wet-chemical synthesis of two types of amorphous/crystalline heterophase PdCu nanosheets is reported, in which one is amorphous phase-dominant and the other one is crystalline phase-dominant. Then the aging process of the synthesized PdCu nanosheets is studied, during which their crystallinity increases, accompanied by changes in some physicochemical properties. As a proof-of-concept application, their aging effect on catalytic hydrogenation of 4-nitrostyrene is investigated. As a result, the amorphous phase-dominant nanosheets initially show excellent chemoselectivity. After aging for 14 days, their catalytic activity is higher than that of crystalline phase-dominant nanosheets. This work demonstrates the intriguing properties of heterophase nanostructures, providing a new platform for future studies on the regulation of functionalities and applications of nanomaterials by phase engineering.

A one-pot two-step synthesis of tertiary alcohols combining the biocatalytic laccase/TEMPO oxidation system with organolithium reagents in aerobic aqueous media at room temperature

2021 ◽  
Author(s):  
Joaquín García-Álvarez ◽  
Vito Capriati ◽  
Luciana Cicco ◽  
Javier González-Sabín ◽  
Alejandro Presa Soto ◽  
...  
Keyword(s):  
Room Temperature ◽  
Aqueous Media ◽  
Proof Of Concept ◽  
One Pot ◽  
Tempo Oxidation ◽  
Tertiary Alcohols ◽  
Organolithium Reagents ◽  
The One ◽  
First Time ◽  
Oxidation System

The one-pot/two-step combination of enzymes and polar organometallic chemistry in aqueous media is for the first time presented as a proof-of-concept study. The unprecedented combination of the catalytic oxidation of...

The one-pot nonhydrolysis Staudinger reaction and Staudinger or SPAAC ligation

2019 ◽  
Vol 17 (23) ◽  
pp. 5675-5679 ◽  
Author(s):  
Longhuai Cheng ◽  
Xueying Kang ◽  
Dan Wang ◽  
Yasi Gao ◽  
Long Yi ◽  
...  
Keyword(s):  
Living Cells ◽  
Staudinger Reaction ◽  
Proof Of Concept ◽  
One Pot ◽  
Concept Study ◽  
The One

The one-pot nonhydrolysis Staudinger reaction and Staudinger or SPAAC ligation were used for producing a FRET-based dyad in living cells as a proof-of-concept study.

scholarly journals Highly Porous Au–Pt Bimetallic Urchin-Like Nanocrystals for Efficient Electrochemical Methanol Oxidation

Nanomaterials ◽  
2021 ◽  
Vol 11 (1) ◽  
pp. 112
Author(s):  
Heon Chul Kim ◽  
Jong Wook Hong
Keyword(s):  
Methanol Oxidation ◽  
Active Sites ◽  
Synthesis Method ◽  
High Porosity ◽  
One Pot ◽  
Wet Chemical Synthesis ◽  
Bimetallic Nanocrystals ◽  
Wet Chemical ◽  
Surface Active ◽  
Highly Porous

Highly porous Au–Pt urchin-like bimetallic nanocrystals have been prepared by a one-pot wet-chemical synthesis method. The porosity of urchin-like bimetallic nanocrystals was controlled by amounts of hydrazine used as reductant. The prepared highly porous Au-Pt urchin-like nanocrystals were superior catalysts of electrochemical methanol oxidation due to high porosity and surface active sites by their unique morphology. This approach will pave the way for the design of bimetallic porous materials with unprecedented functions.

scholarly journals Efficient One-pot Synthesis of 4 Hydroxy-2H Chromene by heterogeneously catalyzed ZnO NP and mesoporous aluminosilicate catalysts in solvent free condition.

2021 ◽  
Author(s):  
Birendra Nath Mahato ◽  
Krithiga T. ◽  
G. Yogalakshmi ◽  
Aravind Kumar
Keyword(s):  
Anticancer Agents ◽  
Maximum Yield ◽  
Biologically Active ◽  
One Pot ◽  
Chemical Route ◽  
Solvent Free Condition ◽  
Wet Chemical ◽  
Wet Chemical Route ◽  
Mesoporous Zno ◽  
The One

4Hydroxy-2H Chromenes are fused benzopyran rings, an important class of biologically active compounds, widely used as antibacterial, antiviral, antitumor, and anticancer agents. In this present paper, we report the 4 Hydroxy-2H Chromenes synthesis by using two catalysts namely, (i) ZnO nanoparticles and (ii) mesoporous ZnO/AlSBA-15 (7) catalysts. The ZnO NP catalyst was prepared by using leaf extract while ZnO/AlSBA-15(7) catalysts were prepared by the wet chemical route. All catalysts were characterized by XRD, SEM, EDS, FTIR, and N2 sorption techniques. The catalytic activity of the synthesized catalyst was evaluated in the one-pot reaction using aromatic aldehyde and Coumarin, and found to be maximum yield of 81% at temperature 80°C, a catalyst dose of 10 mmol %, in time limit of 4h.

One-pot wet chemical synthesis of fluorine-containing TiO2 nanoparticles with enhanced photocatalytic activity

2019 ◽  
Vol 109 ◽  
pp. 227-232 ◽  
Author(s):  
Duk-Hee Lee ◽  
Basudev Swain ◽  
Dongyoon Shin ◽  
Nak-Kyoon Ahn ◽  
Jae-Ryang Park ◽  
...  
Keyword(s):  
Photocatalytic Activity ◽  
Chemical Synthesis ◽  
Tio2 Nanoparticles ◽  
One Pot ◽  
Wet Chemical Synthesis ◽  
Wet Chemical

A Series of Metal-Organic Frameworks for Selective CO2 Capture and Catalytic Oxidative Carboxylation of Olefins

2018 ◽  
Author(s):  
Huong T. D. Nguyen ◽  
Y B. N. Tran ◽  
Hung N. Nguyen ◽  
Tranh C. Nguyen ◽  
Felipe Gándara ◽  
...  
Keyword(s):  
Room Temperature ◽  
Gas Adsorption ◽  
New Materials ◽  
One Pot ◽  
Acid Gas ◽  
Naphthalene Diimide ◽  
Styrene Carbonate ◽  
Metal Organic ◽  
Adsorption Of Co ◽  
The One

<p>Three novel lanthanide metal˗organic frameworks (Ln-MOFs), namely MOF-590, -591, and -592 were constructed from a naphthalene diimide tetracarboxylic acid. Gas adsorption measurements of MOF-591 and -592 revealed good adsorption of CO<sub>2</sub> (low pressure, at room temperature) and moderate CO<sub>2</sub> selectivity over N<sub>2</sub> and CH<sub>4</sub>. Accordingly, breakthrough measurements were performed on a representative MOF-592, in which the separation of CO<sub>2</sub> from binary mixture containing N<sub>2</sub> and CO<sub>2</sub> was demonstrated without any loss in performance over three consecutive cycles. Moreover, MOF-590, MOF-591, and MOF-592 exhibited catalytic activity in the one-pot synthesis of styrene carbonate from styrene and CO<sub>2</sub> under mild conditions (1 atm CO<sub>2</sub>, 80 °C, and solvent-free). Among the new materials, MOF-590 revealed a remarkable efficiency with exceptional conversion (96%), selectivity (95%), and yield (91%). </p><br>

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