Size-Controlled Synthesis of CuNi Nano-Octahedra and Their Catalytic Performance towards 4-Nitrophenol Reduction Reaction

MRS Advances ◽  
2019 ◽  
Vol 4 (5-6) ◽  
pp. 263-269 ◽  
Author(s):  
Can Li ◽  
Yiliang Luan ◽  
Bo Zhao ◽  
Amar Kumbhar ◽  
Jiye Fang
Keyword(s):  
Catalytic Performance ◽  
Reduction Reaction ◽  
Controlled Synthesis ◽  
Solution Approach ◽  
Size Dependent ◽  
Surface Areas ◽  
Nitrophenol Reduction ◽  
Crystallographic Planes ◽  
Size Controlled ◽  
Octahedral Nanocrystals

ABSTRACTIn this work, we demonstrate a size-controlled synthesis of CuNi octahedral nanocrystals (NCs) using a hot colloidal solution approach. Two different sizes of CuNi nano-octahedra are chosen and investigated. It is determined that the reagent concentration remarkably plays a key role in the formation of the size-defined CuNi octahedral NCs. In terms of the reduction of 4-nitrophenol (4-NP), it uncovers that the obtained CuNi octahedral NCs (in both sizes) exhibit higher catalytic activity than those of CuNi spherical NCs reported previously. It further indicates that the catalytic performance is strongly size-dependent due to their devise specific surface areas of the exposed crystallographic planes.

scholarly journals Size controlled green synthesis of gold nanoparticles using Coffea arabica seed extract and their catalytic performance in 4-nitrophenol reduction

RSC Advances ◽  
2018 ◽  
Vol 8 (44) ◽  
pp. 24819-24826 ◽  
Author(s):  
N. K. R. Bogireddy ◽  
U. Pal ◽  
L. Martinez Gomez ◽  
V. Agarwal
Keyword(s):  
Gold Nanoparticles ◽  
Catalytic Activity ◽  
Green Synthesis ◽  
Coffea Arabica ◽  
Room Temperature ◽  
Catalytic Performance ◽  
Seed Extract ◽  
Size Dependent ◽  
Nitrophenol Reduction ◽  
Size Controlled

Size dependent catalytic activity of AuNPs synthesized at room temperature from Coffea arabica seed extract.

Shape- and size-controlled synthesis of Cu nanoparticles wrapped on RGO nanosheet catalyst and their outstanding stability and catalytic performance in the hydrogenation reaction of dimethyl oxalate

2018 ◽  
Vol 6 (39) ◽  
pp. 19133-19142 ◽  
Author(s):  
Mohamed Abbas ◽  
Zheng Chen ◽  
Jiangang Chen
Keyword(s):  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Controlled Synthesis ◽  
Cu Nanoparticles ◽  
Dimethyl Oxalate ◽  
Size Controlled ◽  
Shape And Size

A novel sonochemical approach was developed for the synthesis of morphology-controlled Cu NPs wrapped on RGO NSs catalysts and their superior stability and catalytic performance in dimethyl oxalate hydrogenation reaction.

Facet-dependent Catalysis of CuNi Nanocatalysts toward 4–Nitrophenol Reduction Reaction

MRS Advances ◽  
2020 ◽  
Vol 5 (27-28) ◽  
pp. 1491-1496
Author(s):  
Can Li ◽  
Yiliang Luan ◽  
Bo Zhao ◽  
Amar Kumbhar ◽  
Xiaobo Chen ◽  
...  
Keyword(s):  
Sodium Borohydride ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
High Rate ◽  
Colloidal Synthesis ◽  
Pseudo First Order Reaction ◽  
Nitrophenol Reduction ◽  
Crystallographic Facets ◽  
Capping Ligands ◽  
Synthesis Approach

ABSTRACTWe report a facile method to fabricate CuNi nano-octahedra and nanocubes using a colloidal synthesis approach. The CuNi nanocrystals terminated with exclusive crystallographic facets were controlled and achieved by a group of synergetic capping ligands in a hot solution system. Specifically, the growth of {111}-bounded CuNi nano-octahedra is derived by a thermodynamic control, whereas the generation of {100}-terminated CuNi nanocubes is steered by a kinetic capping of chloride. Using a reduction of 4-nitrophenol with sodium borohydride as a model reaction, CuNi nano-octahedra and nanocubes demonstrated a strong facet-dependence due to their different surface energies although both exhibited remarkable catalytic activity with the high rate constant over mass (k/m). A kinetic study indicated that this is a pseudo first-order reaction with an excess of sodium borohydride. CuNi nanocubes as the catalysts showed better catalytic performance (k/m = 385 s-1•g-1) than the CuNi nano-octahedra (k/m = 120 s-1•g-1), indicating that 4-nitrophenol and hydrogen were adsorbed on the {100} facets with their molecules parallel to the surface much easier than those on {111} facets.

scholarly journals Ruthenium Supported on Ionically Cross-linked Chitosan-Carrageenan Hybrid MnFe2O4 Catalysts for 4-Nitrophenol Reduction

Catalysts ◽  
2019 ◽  
Vol 9 (3) ◽  
pp. 254 ◽  
Author(s):  
Kin Hong Liew ◽  
Tian Khoon Lee ◽  
Mohd Ambar Yarmo ◽  
Kee Shyuan Loh ◽  
Andreia F. Peixoto ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Electrostatic Interactions ◽  
Catalytic Performance ◽  
Reduction Reaction ◽  
Ru Nanoparticles ◽  
Nitrophenol Reduction ◽  
Active Metal ◽  
Wide Range ◽  
Mnfe2o4 Nanoparticles ◽  
Superparamagnetic Properties

Herein, we report a facile procedure to synthesize the hybrid magnetic catalyst (Ru@CS-CR@Mn) using ruthenium (Ru) supported on ionically cross-linked chitosan-carrageenan (CS-CR) and manganese ferrite (MnFe2O4) nanoparticles with excellent catalytic activity. The ionic gelation of CS-CR is acting as a protecting layer to promote the encapsulation of MnFe2O4 and Ru nanoparticles by electrostatic interactions. The presence of an active metal and a CS-CR layer on the as-prepared Ru@CS-CR@Mn catalyst was well determined by a series of physicochemical analyses. Subsequently, the catalytic performances of the Ru@CS-CR@Mn catalysts were further examined in the 4-nitrophenol (4-NP) reduction reaction in the presence of sodium borohydride (reducing agent) at ambient temperature. The Ru@CS-CR@Mn catalyst performed excellent catalytic activity in the 4-NP reduction, with a turnover frequency (TOF) values of 925 h−1 and rate constant (k) of 0.078 s−1. It is worth to mentioning that the Ru@CS-CR@Mn catalyst can be recycled and reused up to at least ten consecutive cycles in the 4-NP reduction with consistency in catalytic performance. The Ru@CS-CR@Mn catalyst is particularly attractive as a catalyst due to its superior catalytic activity and superparamagnetic properties for easy separation. We foresee this catalyst having high potential to be extended in a wide range of chemistry applications.

scholarly journals Size-controlled synthesis of Cu2O nanoparticles: size effect on antibacterial activity and application as a photocatalyst for highly efficient H2O2 evolution

RSC Advances ◽  
2017 ◽  
Vol 7 (82) ◽  
pp. 51822-51830 ◽  
Author(s):  
Liangbin Xiong ◽  
Huaqing Yu ◽  
Changjiang Nie ◽  
Yongjun Xiao ◽  
Qingdong Zeng ◽  
...  
Keyword(s):  
Antibacterial Activity ◽  
Size Effect ◽  
High Efficiency ◽  
Controlled Synthesis ◽  
Size Dependent ◽  
Highly Efficient ◽  
Cu2o Nanoparticles ◽  
Size Controlled

Size-controlled synthesis and size-dependent antibacterial activity of Cu2O nanoparticles with high efficiency for H2O2 evolution.

Size-controlled synthesis of MFI metallosilicate and their catalytic performance on acetone to olefins reaction

2016 ◽  
Vol 224 ◽  
pp. 68-74 ◽  
Author(s):  
Taichi Taniguchi ◽  
Yuta Nakasaka ◽  
Keitaro Yoneta ◽  
Teruoki Tago ◽  
Takao Masuda
Keyword(s):  
Catalytic Performance ◽  
Controlled Synthesis ◽  
Size Controlled

Size-Controlled Synthesis of Metallosilicates with MTW Structure and Catalytic Performance for Methanol-to-Propylene Reaction

2016 ◽  
Vol 146 (3) ◽  
pp. 666-676 ◽  
Author(s):  
Taichi Taniguchi ◽  
Yuta Nakasaka ◽  
Keitaro Yoneta ◽  
Teruoki Tago ◽  
Takao Masuda
Keyword(s):  
Catalytic Performance ◽  
Controlled Synthesis ◽  
Size Controlled
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