CeO2 Thickness-Dependent SERS and Catalytic Properties of CeO2-on-Ag Particles Synthesized by O2-Assisted Hydrothermal Method

2014 ◽  
Vol 118 (33) ◽  
pp. 19238-19245 ◽  
Author(s):  
Sujie Chang ◽  
Shigang Ruan ◽  
Erlong Wu ◽  
Weixin Huang
Keyword(s):  
Hydrothermal Method ◽  
Catalytic Properties ◽  
Ag Particles

Fabrication of Bifunctional SiO2/Europium-Polyoxometalates/Ag Particles and their Luminescence and Catalysis Properties

2013 ◽  
Vol 575-576 ◽  
pp. 216-224
Author(s):  
Jun Wang ◽  
Shao Hua Fan ◽  
Wei Qian Zhao ◽  
Wu Ke Li ◽  
Xue Lian Lu
Keyword(s):  
Main Product ◽  
Catalytic Properties ◽  
Uv Light ◽  
Luminescent Properties ◽  
Silica Spheres ◽  
Hybrid Particles ◽  
Red Emission ◽  
Transmission Electron ◽  
Ag Particles ◽  
Luminescent Spectra

In this paper, Stöber silica particles were decorated with polyethyleneimine and silver nanoparticles and Eu-polyoxometalates were grafted on the surface of polyethyleneimine/silica spheres. The hybrid SiO2/Eu-polyoxometalates/Ag particles were characterized by IR, UVvis, luminescent spectra, scanning electron microscopy, transmission electron microscope, and cyclic voltammetry (CV), respectively. The hybrid particles show the bright red emission under UV light which can be observed by naked eyes. The luminescent properties of particles have been investigated which show that Ag nanoparticles have an influences on the luminescence of europium ions. The electrochemical activities of SiO2/Eu-polyoxometalates/Ag particles have been demonstrated by CV measurement. The catalytic results indicate that the hybrid particles show the catalytic properties in the oxidation of styrene and benzaldehyde is the main product of the reaction.

Nanoscale characterization of Pd/TiO2 catalysts and Ag/TiO2 catalysts by electron holography

2005 ◽  
Vol 900 ◽  
Author(s):  
Satoshi Ichikawa ◽  
Tomoki Akita ◽  
Kazuyuki Okazaki ◽  
Koji Tanaka ◽  
Masanori Kohyama
Keyword(s):  
Catalytic Properties ◽  
Nano Particles ◽  
Electron Holography ◽  
Noble Metal Catalysts ◽  
Ag Particles ◽  
Nanoscale Characterization ◽  
The Mean ◽  
Ag Particle ◽  
Experimental Values

ABSTRACTCatalytic properties of noble metal catalysts are often caused by their nanostructures and the interaction between nano particles and oxides supports. We examine the mean inner potential of Pd particles in Pd/TiO2 catalyst and Ag particles in Ag/TiO2 catalysts using electron holography and HRTEM. And we compare the results of the Pd/TiO2 and Ag/TiO2 systems with our previous results of the Au/TiO2 and Pt/TiO2 systems. In the case of the Pd/TiO2 catalysts, when the size of Pd particle is smaller than 5nm, the mean inner potential of Pd changes to be higher than the calculated value of the mean inner potential which is thought to be higher than the experimental values of bulk Pd by 3-5V. The mean inner potential of Pd becomes to increase gradually as the size of the Pd particle decreases. The rate of the increment in the mean inner potential of Pd is lower than that of Au/TiO2 catalysts and Pt/TiO2 catalysts. On the other hand, in the case of Ag/TiO2 catalysts, the mean inner potential of Ag does not increase though the size of the Ag particle decreases to under 2nm.

Preparation Nano-Sized ZnO/Ag Particles and Photocatalytic Degradation of UDMH Wastewater

2014 ◽  
Vol 1015 ◽  
pp. 442-446 ◽  
Author(s):  
Ying Jia ◽  
Ya Nan He ◽  
Feng Hao Liang ◽  
Mei Yuan ◽  
Tian Tian Liu
Keyword(s):  
Waste Water ◽  
Quantum Yield ◽  
Photocatalytic Degradation ◽  
Crystallite Size ◽  
Hydrothermal Method ◽  
Light Sources ◽  
Photocatalytic Process ◽  
Spectral Absorption ◽  
Degradation Rates ◽  
Ag Particles

Different morphologies of nanoZnO have been synthesized by hydrothermal method and ethanol-assisted hydrothermal method, the quantum yield has been improved by noble metal doping, and also the range of spectral absorption has been widened. Then the products are used in the photocatalytic process of UDMH waste water. It is found that the crystallite size of the products is about 41~46nm, the maximum degradation rates of ZnO/Ag are 92.7% under the ultraviolet light, and 80.2% under the sunlight. The variation of the photocatalytic middle-product under different light sources is analyzed and it is found that the middle-product is decomposed more quickly and throughly under sunlight.

Controlled synthesis of Au–Fe3O4 hybrid hollow spheres with excellent SERS activity and catalytic properties

2014 ◽  
Vol 43 (21) ◽  
pp. 7998-8006 ◽  
Author(s):  
Qian Gao ◽  
Aiwu Zhao ◽  
Hongyan Guo ◽  
Xucheng Chen ◽  
Zibao Gan ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Method ◽  
Catalytic Properties ◽  
Hollow Spheres ◽  
Controlled Synthesis ◽  
One Pot

Here demonstrated a facile one-pot hydrothermal method for the controlled synthesis of porous Au–Fe3O4 hybrid hollow spheres. The obtained spheres exhibit superior SERS sensitivity and excellent catalytic activity.

Controlled synthesis of Bi25FeO40 with different morphologies: growth mechanism and enhanced photo-Fenton catalytic properties

2017 ◽  
Vol 46 (32) ◽  
pp. 10586-10593 ◽  
Author(s):  
Wenda Ji ◽  
Mingmeng Li ◽  
Gaoke Zhang ◽  
Pei Wang
Keyword(s):  
Catalytic Activity ◽  
Hydrothermal Method ◽  
Growth Mechanism ◽  
Catalytic Properties ◽  
Controlled Synthesis ◽  
Simple Hydrothermal Method

Bi25FeO40 microtetrahedra, microcubes and microspheres were synthesized via a simple hydrothermal method and the microcubes showed enhanced photo-Fenton catalytic activity.

Tailored synthesis of well-faceted single crystals of Fe3O4 and their application in p-nitrophenol reduction

RSC Advances ◽  
2016 ◽  
Vol 6 (35) ◽  
pp. 29497-29503 ◽  
Author(s):  
Jun Liang ◽  
Ajuan Yue ◽  
Qingcheng Wang ◽  
Shuang Song ◽  
Li Li
Keyword(s):  
Single Crystals ◽  
Hydrothermal Method ◽  
Catalytic Properties ◽  
High Yield ◽  
Facile Hydrothermal Method ◽  
Nitrophenol Reduction

Well-defined Fe3O4 nanocrystals (NCs), which exhibit excellent catalytic properties, have been synthesized in high yield via a facile hydrothermal method.

scholarly journals MoS2 Coexisting in 1T and 2H Phases Synthesized by Common Hydrothermal Method for Hydrogen Evolution Reaction

Nanomaterials ◽  
2019 ◽  
Vol 9 (6) ◽  
pp. 844 ◽  
Author(s):  
Yixin Yao ◽  
Kelong Ao ◽  
Pengfei Lv ◽  
Qufu Wei
Keyword(s):  
Hydrothermal Method ◽  
Molybdenum Disulfide ◽  
Hydrogen Evolution ◽  
Structural Changes ◽  
Catalytic Properties ◽  
Solvothermal Method ◽  
Catalytic Performance ◽  
Crystal Forms ◽  
The Common ◽  
Further Development

Molybdenum disulfide has been one of the most studied hydrogen evolution catalyst materials in recent years, but its disadvantages, such as poor conductivity, hinder its further development. Here, we employ the common hydrothermal method, followed by an additional solvothermal method to construct an uncommon molybdenum disulfide with two crystal forms of 1T and 2H to improve catalytic properties. The low overpotential (180 mV) and small Tafel slope (88 mV/dec) all indicated that molybdenum disulfide had favorable catalytic performance for hydrogen evolution. Further conjunctions revealed that the improvement of performance was probably related to the structural changes brought about by the 1T phase and the resulting sulfur vacancies, which could be used as a reference for the further application of MoS2.

Catalytic oxidation of NO over MnO2 with different crystal structures

RSC Advances ◽  
2016 ◽  
Vol 6 (59) ◽  
pp. 54032-54040 ◽  
Author(s):  
Hu Chen ◽  
Ying Wang ◽  
Yong-Kang Lv
Keyword(s):  
Crystal Structures ◽  
Catalytic Oxidation ◽  
Hydrothermal Method ◽  
Catalytic Properties ◽  
No Oxidation ◽  
Oxidation Of No

α-, β-, γ- and δ-MnO2 catalysts were prepared by a hydrothermal method and their catalytic properties for NO oxidation were evaluated.

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