A facile synthesis of CuO nanowires and nanorods, and their catalytic activity in the oxidative degradation of Rhodamine B with hydrogen peroxide

2014 ◽  
Vol 46 ◽  
pp. 169-173 ◽  
Author(s):  
Hao Li ◽  
Jinyun Liao ◽  
Tao Zeng
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Rhodamine B ◽  
Oxidative Degradation ◽  
Facile Synthesis ◽  
Cuo Nanowires

A facile one-pot synthesis of three-dimensional microflower birnessite (δ-MnO2) and its efficient oxidative degradation of rhodamine B

RSC Advances ◽  
2016 ◽  
Vol 6 (28) ◽  
pp. 23905-23912 ◽  
Author(s):  
Minggao Qin ◽  
Haoliang Zhao ◽  
Weijun Yang ◽  
Yuanrong Zhou ◽  
Feng Li
Keyword(s):  
Rhodamine B ◽  
High Purity ◽  
Three Dimensional ◽  
Oxidative Degradation ◽  
Facile Synthesis ◽  
One Pot ◽  
One Pot Synthesis

A facile synthesis of high purity microflower birnessite and its efficient oxidative degradation of RhB.

Synthesis and Catalytic Properties of CoFe2O4/Fe2O3 Nanosized Composite Material

2021 ◽  
Vol 316 ◽  
pp. 56-61
Author(s):  
N.P. Shabelskaya ◽  
M.A. Egorova ◽  
E.V. Vasilieva
Keyword(s):  
Hydrogen Peroxide ◽  
Composite Material ◽  
Catalytic Activity ◽  
Oxidative Degradation ◽  
Average Crystallite Size ◽  
X Ray ◽  
Cell Parameters ◽  
Reaction Rate Increase ◽  
Developed Surface ◽  
Degradation Reaction

The present research is devoted to the formation process of a nanoscale composite material with the composition of CoFe2O4/α-Fe2O3. The synthesized material has been studied by the following methods: x-ray phase analysis and scanning electron microscopy. The produced sample is analyzed to be a CoFe2O4 cabic spinel with a unit cell parameters of a = 0.8394 nm and α-Fe2O3. The average crystallite size of the resulting samples, determined by the Debye-Scherrer equation, is 4.8 nm for the cobalt (II) ferrite and 7.9 nm for α-Fe2O3. Reaction rate increase is determined by the incease in hydrogen peroxide amount in the solution. The synthesized composite material is found to exhibit increased catalytic activity in the oxidative degradation reaction of organic dye by hydrogen peroxide. The catalytic activity is established to be particularly high, when the process is occurring in acidic medium. The obtained samples have a highly developed surface and may be of interest as catalysts, adsorbents.

Decomposition of hydrogen peroxide on a two-component NiO-CdO catalyst and the effect of ionizing radiation on its catalytic properties

1979 ◽  
Vol 44 (4) ◽  
pp. 1015-1022 ◽  
Author(s):  
Viliam Múčka
Keyword(s):  
Aqueous Solution ◽  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Nickel Oxide ◽  
Catalytic Properties ◽  
Cadmium Oxide ◽  
Chemisorb Oxygen ◽  
Composition Region ◽  
Chemisorbed Oxygen ◽  
Two Component

The catalytic properties of two-component catalyst nickel oxide-cadmium oxide with the proportions of the components covering the whole composition region 0-100% were examined by studying the decomposition of hydrogen peroxide in aqueous solution on it. In the range 0-25 mol.% CdO, cadmium oxide is found to affect infavourably the ability of nickel oxide to chemisorb oxygen. The amount of the chemisorbed oxygen increases several times on gamma irradiation of the samples. The effect of cadmium oxide on the catalytic activity of the system shows up in fresh samples only indirectly via the changed amount of the oxygen chemisorbed. In older samples the initial catalytic activity of the system is changed, which can be explained based on the concept of bivalent catalytic centres in terms of the co-action of the catalytic centres of the two oxides, which are in equilibrium. The irradiation of the system under study speeds up the processes leading to the establishing of this equilibrium which is thermally very stable, and results in a substantial increase of the catalytic activity of the samples investigated.

Hydrogen peroxide decomposition on a two-component CuO-Cr2O3 catalyst

1988 ◽  
Vol 53 (8) ◽  
pp. 1636-1646 ◽  
Author(s):  
Viliam Múčka ◽  
Kamil Lang
Keyword(s):  
Hydrogen Peroxide ◽  
Catalytic Activity ◽  
Extreme Values ◽  
Catalytic Properties ◽  
Active Components ◽  
Catalytic Systems ◽  
Heterogeneous Catalytic ◽  
Peroxide Decomposition ◽  
Two Component ◽  
Catalytically Active

Some physical and catalytic properties of the two-component copper(II)oxide-chromium(III)oxide catalyst with different content of both components were studied using the decomposition of the aqueous solution of hydrogen peroxide as a testing reaction. It has been found that along to both basic components, the system under study contains also the spinel structure CuCr2O4, chromate washable by water and hexavalent ions of chromium unwashable by water. The soluble chromate is catalytically active. During the first period of the reaction the equilibrium is being established in both homogeneous and heterogeneous catalytic systems. The catalytic activity as well as the specific surface area of the washed solid is a non-monotonous function of its composition. It seems highly probable that the extreme values of both these quantities are not connected with the detected admixtures in the catalytic system. The system under study is very insensitive with regard to the applied doses of gamma radiation. Its catalytic properties are changed rather significantly after the thermal treatment and particularly after the partial reduction to low degree by hydrogen. The observed changes of the catalytic activity of the system under study are very probably in connection with the changes of the valence state of the catalytically active components of the catalyst.

Facile synthesis of Co3O4-NiNPs composite for electrochemical non-enzymatic sensing platform of small chemical molecules

2021 ◽  
Author(s):  
Miaomiao Zou ◽  
Li Feng ◽  
Xiaoyun Lin ◽  
Yongnian Ni
Keyword(s):  
Hydrogen Peroxide ◽  
Glassy Carbon Electrode ◽  
Glassy Carbon ◽  
Carbon Electrode ◽  
Modified Glassy Carbon Electrode ◽  
Facile Synthesis ◽  
Nano Composite ◽  
Sensing Platform ◽  
Morphology And Structure ◽  
Small Chemical

In this paper, a new Co3O4-Ni nano-composite modified glassy carbon electrode (Co3O4-NiNPs/GCE) was successfully constructed and used to detect glucose and hydrogen peroxide (H2O2). The morphology and structure of Co3O4...

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