Synergistic effect of ternary electrospun TiO2/Fe2O3/PPy composite nanofibers on peroxidase-like mimics with enhanced catalytic performance

RSC Advances ◽  
2016 ◽  
Vol 6 (37) ◽  
pp. 31107-31113 ◽  
Author(s):  
Yanzhou Jiang ◽  
Guangdi Nie ◽  
Maoqiang Chi ◽  
Zezhou Yang ◽  
Zhen Zhang ◽  
...  
Keyword(s):  
Synergistic Effect ◽  
Shell Structure ◽  
Composite Nanofibers ◽  
Enzyme System ◽  
Catalytic Performance ◽  
Core Shell ◽  
Artificial Enzyme ◽  
Core Shell Structure

In this work, we demonstrate the fabrication of polypyrrole (PPy) decorated TiO2/Fe2O3 (TiO2/Fe2O3/PPy) composite nanofibers with a core–shell structure as an artificial enzyme system with a high peroxidase-like activity.

scholarly journals Direct Fabrication of Reduced Graphene Oxide@SnO2 Hollow Nanofibers by Single-Capillary Electrospinning as Fast NO2 Gas Sensor

2019 ◽  
Vol 2019 ◽  
pp. 1-7
Author(s):  
Dong Wang ◽  
Mingcong Tang ◽  
Jianbo Sun
Keyword(s):  
Graphene Oxide ◽  
Reduced Graphene Oxide ◽  
Gas Sensor ◽  
Shell Structure ◽  
Composite Nanofibers ◽  
Hollow Structure ◽  
Core Shell ◽  
Hollow Nanofibers ◽  
Reduced Graphene ◽  
Core Shell Structure

Single-capillary electrospinning has been exhibited to be a simple and scalable method for fabricating nanofibers. Construction of graphene/inorganic fibers with the core-shell hollow structure using graphene as skeleton has been rarely reported. Here, we show a facile approach to prepare electrospun reduced graphene oxide@SnO2 composite nanofibers with the hollow structure. The hollow core@shell structure is formed in a single-capillary electrospinning process including sintering, which is promising for the preparation of graphene/inorganic composite nanofibers. The reduction of as-synthesized graphene is realized by stannous ion. Resulting hollow and core-shell structure enables the reduced graphene oxide@SnO2 composite nanofibers to adsorb and desorb the target gas more easily, which is promising for future applications as fast NO2 gas sensor.

Methanol Electro-Oxidation Using RuRh@Pt/C

2014 ◽  
Vol 953-954 ◽  
pp. 1297-1302
Author(s):  
Guang Ying Wang ◽  
Li Fang ◽  
Fei Fei Li ◽  
Surin Saipanya
Keyword(s):  
Shell Structure ◽  
Catalytic Performance ◽  
Core Shell ◽  
X Ray Diffraction ◽  
Peak Potential ◽  
Co Tolerance ◽  
The Core ◽  
Promising Application ◽  
Electro Oxidation ◽  
Core Shell Structure

A core-shell structure RuRh@Pt/C nanoparticles was prepared by using a two-step reduction method under ultrasonic promotion. The catalytic performance was tested in methanol electrooxidation. X-ray diffraction (XRD), scanning electron microscope (SEM) combined with cyclic voltammetry (CV) were used to characterize the obtained catalyst. The results showed that there was no alloy formed between the core RuRh and the shell Pt. The electrocatalytic activity of RuRh@Pt/C varied with the Ru/Rh ratio in the bimetallic core, among which the catalyst with the Ru/Rh ratio 1:2 and the Pt-shell thickness of 1.5 ([email protected]/C) showed the highest catalytic activity for methanol. With this catalyst, the current density of the oxidation peak for methanol electro-oxidation reached 2.3 times as that of Pt1.5/C while the corresponding peak potential shifted 60 mV negatively in comparing to that of Pt1.5/C. In addition, the catalyst with the core-shell structure of RuRh@Pt/C possessed much higher CO-tolerance for methanol electro-oxidation, indicating its promising application in low temperature fuel cell.

scholarly journals Novel mesoporous Ag@SiO2 nanospheres as a heterogeneous catalyst with superior catalytic performance for hydrogenation of aromatic nitro compounds

RSC Advances ◽  
2021 ◽  
Vol 11 (60) ◽  
pp. 37708-37712
Author(s):  
Wenyan Li ◽  
Xinying Lin ◽  
Jing Long ◽  
Bo Zheng ◽  
Zhaorui Pan ◽  
...  
Keyword(s):  
Heterogeneous Catalyst ◽  
Shell Structure ◽  
Ag Nanoparticles ◽  
Catalytic Performance ◽  
Hydrogenation Reaction ◽  
Nitro Compounds ◽  
Core Shell ◽  
Aromatic Nitro Compounds ◽  
Core Shell Structure ◽  
Aromatic Nitro

Mesoporous core–shell structure Ag@SiO2 nanospheres are constructed to prevent Ag nanoparticles from aggregation during the hydrogenation reaction.

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