scholarly journals Temperature-responsive catalytic activity of poly(N-isopropylacrylamide)-protected Au/Pt bimetallic nanoparticles in aqueous solutions

1999 ◽  
Vol 10 (1-2) ◽  
pp. 127-133 ◽  
Author(s):  
Chun-Wei Chen ◽  
Mitsuru Akashi
Keyword(s):  
Catalytic Activity ◽  
Aqueous Solutions ◽  
Bimetallic Nanoparticles ◽  
Temperature Responsive

Property of Cu2O-CuO/ZSM-5 nanocomposite and degradation process of azo dye AO7 without sacrificial agent (H2O2)

2016 ◽  
Vol 73 (11) ◽  
pp. 2747-2753 ◽  
Author(s):  
Wusong Kong ◽  
Hongxia Qu ◽  
Peng Chen ◽  
Weihua Ma ◽  
Huifang Xie
Keyword(s):  
Catalytic Activity ◽  
Aqueous Solutions ◽  
Photoelectron Spectroscopy ◽  
Oxygen Demand ◽  
Operating Conditions ◽  
Surface Element ◽  
Impregnation Method ◽  
X Ray ◽  
Initial Ph ◽  
Sacrificial Agent

In this study, Cu2O-CuO/ZSM-5 nanocomposite was synthesized by the impregnation method, and its catalytic performance for the destruction of AO7 in aqueous solutions was investigated. The morphology, structure and surface element valence state of Cu2O-CuO/ZSM-5 were characterized by transmission electron microscopy, X-ray diffraction and X-ray photoelectron spectroscopy. The operating conditions on the degradation of AO7 by Cu2O-CuO/ZSM-5, such as initial pH values, concentration of AO7 and catalyst dosage were investigated and optimized. The results showed that the sample had good catalytic activity for destruction of AO7 in the absence of a sacrificial agent (e.g. H2O2): it could degrade 91% AO7 in 140 min at 25 °C and was not restricted by the initial pH of the AO7 aqueous solutions. Cu2O-CuO/ZSM-5 exhibited stable catalytic activity with little loss after three successive runs. The total organic carbon and chemical oxygen demand removal efficiencies increased rapidly to 69.36% and 67.3% after 120 min of treatment by Cu2O-CuO/ZSM-5, respectively.

scholarly journals Internal Nanoparticle Structure of Temperature-Responsive Self-Assembled PNIPAM-b-PEG-b-PNIPAM Triblock Copolymers in Aqueous Solutions: NMR, SANS, and Light Scattering Studies

Langmuir ◽  
2016 ◽  
Vol 32 (21) ◽  
pp. 5314-5323 ◽  
Author(s):  
Sergey K. Filippov ◽  
Anna Bogomolova ◽  
Leonid Kaberov ◽  
Nadiia Velychkivska ◽  
Larisa Starovoytova ◽  
...  
Keyword(s):  
Light Scattering ◽  
Aqueous Solutions ◽  
Triblock Copolymers ◽  
Temperature Responsive ◽  
Self Assembled ◽  
Nanoparticle Structure

Electrochemical formation of PtRu bimetallic nanoparticles for highly efficient and pH-universal hydrogen evolution reaction

2020 ◽  
Vol 8 (4) ◽  
pp. 2090-2098 ◽  
Author(s):  
Lu Li ◽  
Gengwei Zhang ◽  
Bin Wang ◽  
Tao Yang ◽  
Shengchun Yang
Keyword(s):  
Catalytic Activity ◽  
Synergistic Effect ◽  
Hydrogen Evolution ◽  
Hydrogen Evolution Reaction ◽  
Bimetallic Nanoparticles ◽  
Highly Efficient ◽  
A Performance

The synergistic effect between Pt and Ru in PtRu/CC1500 catalyst results in a promising catalytic activity toward HER, which displays a performance dozens of times higher than that of commercial Pt/C.

Synthesis, characterization and catalytic activity of amorphous Al,SiOx gels from weakly acidic aqueous solutions

1997 ◽  
Vol 7 (12) ◽  
pp. 2469-2476 ◽  
Author(s):  
Irene Pitsch ◽  
Uwe Kürschner ◽  
Dirk Müller ◽  
Barbara Parlitz ◽  
Ellen Schreier ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Aqueous Solutions

Formation of Platinum and Palladium Bimetallic Superfine Particles by Ultrasonic Irradiation

1997 ◽  
Vol 497 ◽  
Author(s):  
Toshiyuki Fujimoto ◽  
Shinya Terauchi ◽  
Hiroyuki Umehara ◽  
Isao Kojima ◽  
William Henderson
Keyword(s):  
Aqueous Solutions ◽  
Metal Ions ◽  
Size Distribution ◽  
Ultrasonic Irradiation ◽  
Bimetallic Nanoparticles ◽  
Average Diameter ◽  
Narrow Size Distribution ◽  
Bimetallic Particles

ABSTRACTPt/Pd bimetallic nanoparticles were prepared by ultrasonic irradiation of aqueous solutions containing salts of both metal ions. Uniform bimetallic particles were found to have a 2.8 nm average diameter and a narrow size distribution. The size was similar to Pt monometallic particles, and the shape was similar to Pd monometallic particles, both prepared by ultrasound in the same way.

Environmentally benign selective hydrogenation of α,β-unsaturated aldehydes and reduction of aromatic nitro compounds using Cu based bimetallic nanoparticles supported on multiwalled carbon nanotubes and mesoporous carbon

RSC Advances ◽  
2016 ◽  
Vol 6 (85) ◽  
pp. 82359-82369 ◽  
Author(s):  
H. N. Hareesh ◽  
K. U. Minchitha ◽  
K. Venkatesh ◽  
N. Nagaraju ◽  
N. Kathyayini
Keyword(s):  
Carbon Nanotubes ◽  
Catalytic Activity ◽  
Mesoporous Carbon ◽  
Bimetallic Nanoparticles ◽  
Nitro Compounds ◽  
Environmentally Benign ◽  
Multiwalled Carbon ◽  
Unsaturated Aldehydes ◽  
Aromatic Nitro Compounds ◽  
Aromatic Nitro

The catalytic activity of these materials was investigated in the hydrogenation of α,β-unsaturated aldehydes and reduction of aromatic nitro compounds using different hydrogen sources.

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