One-step melamine-assisted synthesis of graphene-supported AuPt@Au nanocrystals for enhanced catalytic reduction of p-nitrophenol

RSC Advances ◽  
2015 ◽  
Vol 5 (116) ◽  
pp. 96028-96033 ◽  
Author(s):  
Qi Liu ◽  
Yan-Ru Xu ◽  
Ai-Jun Wang ◽  
Jiu-Ju Feng
Keyword(s):  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Core Shell ◽  
Nitrophenol Reduction ◽  
One Step

Core–shell AuPt@Au NCs/rGO was facilely prepared by a one-step melamine-assisted method, which exhibited enhanced catalytic performance for p-nitrophenol reduction.

scholarly journals One-step synthesis of magnetically recyclable Co@BN core–shell nanocatalysts for catalytic reduction of nitroarenes

RSC Advances ◽  
2017 ◽  
Vol 7 (56) ◽  
pp. 35451-35459 ◽  
Author(s):  
Man Du ◽  
Qiuwen Liu ◽  
Caijin Huang ◽  
Xiaoqing Qiu
Keyword(s):  
Catalytic Activity ◽  
Catalytic Reduction ◽  
Nitroaromatic Compounds ◽  
Core Shell ◽  
Shell Nanoparticles ◽  
Nitrophenol Reduction ◽  
One Step ◽  
Core Shell Nanoparticles

The possible mechanism for Co@BN catalyzed 4-nitrophenol reduction in the presence of NaBH4. Moreover, the 13.6 wt% Co@BN core–shell nanoparticles exhibited the excellent catalytic activity in hydrogenation of nitroaromatic compounds.

One-pot synthesis of porous Pt–Au nanodendrites supported on reduced graphene oxide nanosheets toward catalytic reduction of 4-nitrophenol

2015 ◽  
Vol 3 (1) ◽  
pp. 290-296 ◽  
Author(s):  
Jing-Jing Lv ◽  
Ai-Jun Wang ◽  
Xiaohong Ma ◽  
Ru-Yi Xiang ◽  
Jian-Rong Chen ◽  
...  
Keyword(s):  
Graphene Oxide ◽  
Reduction Method ◽  
Catalytic Reduction ◽  
Catalytic Performance ◽  
Graphene Oxide Nanosheets ◽  
One Pot ◽  
Nitrophenol Reduction ◽  
Reduced Graphene ◽  
Wet Chemical ◽  
Co Reduction

A facile, green and effective one-pot wet-chemical co-reduction method was developed for preparation of Pt–Au pNDs/RGOs in the presence of cytosine. The nanocomposites exhibited significantly enhanced catalytic performance for 4-nitrophenol reduction.

scholarly journals Facile Use of Silver Nanoparticles-Loaded Alumina/Silica in Nanofluid Formulations for Enhanced Catalytic Performance toward 4-Nitrophenol Reduction

2021 ◽  
Vol 18 (6) ◽  
pp. 2994
Author(s):  
Rashmi Mannu ◽  
Vaithinathan Karthikeyan ◽  
Murugendrappa Malalkere Veerappa ◽  
Vellaisamy A. L. Roy ◽  
Anantha-Iyengar Gopalan ◽  
...  
Keyword(s):  
Environmental Remediation ◽  
Catalytic Reduction ◽  
Catalytic Efficiency ◽  
Catalytic Performance ◽  
New Approach ◽  
Catalytic Rate Constant ◽  
Nitrophenol Reduction ◽  
Reduction Efficiency ◽  
Silver Nps ◽  
Ultrasonic Assisted

The introduction of toxic chemicals into the environment can result in water pollution leading to the degradation of biodiversity as well as human health. This study presents a new approach of using metal oxides (Al2O3 and SiO2) modified with a plasmonic metal (silver, Ag) nanoparticles (NPs)-based nanofluid (NF) formulation for environmental remediation purposes. Firstly, we prepared the Al2O3 and SiO2 NFs of different concentrations (0.2 to 2.0 weight %) by ultrasonic-assisted dispersion of Al2O3 and SiO2 NPs with water as the base fluid. The thermo-physical (viscosity, activation energy, and thermal conductivity), electrical (AC conductivity and dielectric constant) and physical (ultrasonic velocity, density, refractive index) and stability characteristics were comparatively evaluated. The Al2O3 and SiO2 NPs were then catalytically activated by loading silver NPs to obtain Al2O3/SiO2@Ag composite NPs. The catalytic reduction of 4-nitrophenol (4-NP) with Al2O3/SiO2@Ag based NFs was followed. The catalytic efficiency of Al2O3@Ag NF and SiO2@Ag NF, for the 4-NP catalysis, is compared. Based on the catalytic rate constant evaluation, the catalytic reduction efficiency for 4-NP is found to be superior for 2% weight Al2O3@Ag NF (92.9 × 10−3 s−1) as compared to the SiO2@Ag NF (29.3 × 10−3 s−1). Importantly, the enhanced catalytic efficiency of 2% weight Al2O3@Ag NF for 4-NP removal is much higher than other metal NPs based catalysts reported in the literature, signifying the importance of NF formulation-based catalysis.

Superior co-catalysis by bimetallic nanostructure for TiO2 photocatalysis

2020 ◽  
Vol 01 ◽  
Author(s):  
Bonamali Pal ◽  
Anila Monga ◽  
Aadil Bathla
Keyword(s):  
Visible Light ◽  
Catalytic Performance ◽  
Transition Metal Catalysts ◽  
Core Shell ◽  
Structural Morphology ◽  
Tio2 Photocatalysis ◽  
Co Catalysts ◽  
Bimetallic Nanocomposites ◽  
Bimetallic Nanostructure ◽  
Bimetallic Nanostructures

Background:: Bimetallic nanocomposites have currently gained significant importance for enhanced catalytic applications relative to monometallic analogues. The synergistic interactions modified electronic and optical properties in the bimetallic (M1@M2) structural morphology e.g., core-shell /alloy nanostructures resulted in a better co-catalytic performance for TiO2 photocatalysis. Objective:: Hence, this article discusses the preparation, characterization, and co-catalytic activity of different bimetallic nanostructures namely, Cu@Zn, Pd@Au, Au@Ag, and Ag@Cu, etc. Method:: These bimetallic co-catalysts deposited on TiO2 possess the ability to absorb visible light due to surface plasmonic absorption and are also expected to display the new properties due to synergy between two distinct metals. As a result, they reveal the highest level of activity than the monometal deposited TiO2. Result:: Their optical absorption, emission, charge carrier dynamics, and surface structural morphology are explained for the improved photocatalytic activity of M1@M2 loaded TiO2 for the hydrogenation of certain organic compounds e.g., quinoline, crotonaldehyde, and 1,3-dinitrobenzene, etc. under UV/ visible light irradiation. Conclusion:: It revealed that the use of bimetallic core@shell co-catalyst for hydrogenation of important industrial organics by M1@M2-TiO2 nanocomposite demonstrates beneficial reactivity in many instances relative to conventional transition metal catalysts.

PtPd nanoframes derived from Pd@PdPt core–shell rhombic dodecahedrals with excellent catalytic performance toward methanol oxidation

2021 ◽  
Author(s):  
Yangyang Ren ◽  
Chuanliang Li ◽  
Baosong Li ◽  
Fan Gao ◽  
Xinghua Zhang ◽  
...  
Keyword(s):  
Methanol Oxidation ◽  
Catalytic Properties ◽  
Catalytic Performance ◽  
Core Shell ◽  
Acid Environment ◽  
Excellent Catalytic Performance

PtPd nanoframes with excellent catalytic properties were obtained by etching Pd@PdPt core–shell RDs with Fe3+ in an acid environment.

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