Preparation method of nickel ferrite based magnetic loaded ...

2009-6-24 · The invention provides a preparation method of nickel ferrite based magnetic loaded type titanium dioxide photo-catalyst with micron grade micron order as carrier the preparation process includes the following steps: adding green copperas solution and oxalic acid solution into the nickel salt solution for reaction to obtain the mixture precipitate of oxalate of nickel oxalate and iron oxalate ...

Study of preparation method and oxidization/reduction ...

The effect of preparation method and oxidation state of the active metal on the catalytic activity of Ni-Ce-O catalysts was studied for aqueous phase reforming of ethanol. A sol-gel (SG) route and a solution combustion synthesis (SCS) method were used for the preparation of 10 wt% Ni loaded catalysts. The catalytic activity of three groups of catalysts; reduced at 425 °C (HR, metallic Ni ...

Study of preparation method and oxidization/reduction ...

The effect of preparation method and oxidation state of the active metal on the catalytic activity of Ni–Ce–O catalysts was studied for aqueous phase reforming of ethanol. A sol-gel (SG) route and a solution combustion synthesis (SCS) method were used for the preparation …

Preparation of copper monosulfide and nickel …

2012-9-11 · Preparation of copper monosulfide and nickel monosulfide nanoparticles by sonochemical method Hui Wanga, Jian-Rong Zhangb, Xiao-Ning Zhaob, Shu Xua, Jun-Jie Zhua,* aDepartment of Chemistry, State Key Laboratory of Coordination Chemistry, Nanjing University, Nanjing 210093, PR China bModern Analytical Center, Nanjing University, Nanjing 210093, PR China

Effects of preparation method and temperature on the ...

ZnGa 2 O 4 spinel powders were prepared by two different methods: sol-gel method (SG) and solid state reaction method (SSR). The distribution of cations (Ga 3+, Zn 2+) in the tetrahedral and octahedral sites in ZnGa 2 O 4 as a function of synthesis method and annealing temperature has been investigated by X-ray photoelectron spectroscopy. The results showed that Ga 3+ ions were located in ...

Surfactant‐Free Sol–Gel Synthesis Method for the ...

2019-10-17 · The results indicate that the surfactant-free sol–gel method is highly effective to prepare nickel-based catalysts with high Brunauer–Emmett–Teller (BET) area in the range of 269.2–297.3 m 2 g −1. The increment in nickel content from 15 to 30 wt% increases the size of the Ni crystals from 3.7 to 4.2 nm, weakens the interaction between ...

Effects of preparation methods of support on the ...

Using tetraethyl orthosilicate (TEOS) as the precursor of silica, the silica aerogel and xerogel, which were used as supports of nickel-based catalysts for liquid hydrogenation of m-dinitrobenzene to m-phenylenediamine, were prepared by the sol-gel method combined with supercritical drying (SCD) and conventional drying, respectively. Then, a series of nickel-based catalyst samples supported on ...

Preparation of Linear α-Olefins Using Cationic Nickel(II ...

2019-5-26 · Nickel(II) dibromide complexes containing para- and unsubstituted aryl α-diimine ligands in combination with modified methylaluminoxane (MMAO) are highly active and efficient catalysts for the oligomerization of ethylene to linear α-olefins. α-Olefins in the C4−C26 range have been prepared with selectivities as high as 94%. The Schulz−Flory product distributions and selectivities for α ...

Preparation of nanosized nickel aluminate spinel by a ...

2002-3-7 · Nanosized nickel aluminate particles have been synthesized using a precursor method with the aid of ultrasound irradiation. The precursor on heating yields nanosized NiAl 2 O 4 particles. The nanoparticles have a surface area of about 108 m 2 g −1 and a particle size of ca. 13 nm. The precursor and the nanoparticles have been characterized by ...

Preparation of polysulfone materials on nickel foam for ...

The method repeatability by intra- and interday experiments shows that the RSD values for water and biological samples were 1.0-9.9% and 1.7-10.3%, with the quantitative limits of three floxacin drugs as 3.0-6.2 μg L-1. Graphical Abstract Preparation diagram of polysulfone material. PMID: 28251294 [Indexed for MEDLINE] MeSH terms. Adsorption ...

Nickel slag brick and preparation method thereof ...

The invention discloses a nickel slag brick and a preparation method thereof. The nickel slag brick is a novel nickel slag brick which is prepared by taking water quenching nickel slag a main material and industrial waste residue, lime, a little quantity of cement and a proper quantity of water as assistant materials in the procedures of uniformly stirring, then moulding by adopting a ...

Preparation of nickel nanoparticles for catalytic ...

2010-12-23 · Spherical oxidized nickel particles 15 to 200 nm in average size have been produced by a crucibleless aerosol method involving metal vapor condensation in an inert gas flow and oxidation processes. The particles have been characterized by scanning electron microscopy, X-ray microanalysis, X-ray diffraction, BET surface area measurements, and vibrating-sample magnetometry. The process ...

Influence of carbonate and nickel(II) concentration on the ...

2018-11-1 · The preparation method was adapted from the procedure employed to synthesize hydroxyapatite doped with zinc (Ca,Zn)Hap . The phosphates were prepared by dropwise addition of two solutions 0.2 M, (one of calcium and nickel acetate (Fluka, Pro Analysis)) and the other of ammonium phosphates (BDH, Pro Analysis) to a stirred solution of ammonium ...

Preparation of Nickel Aluminum-Manganese Spinel Oxides …

Two different procedures were used to prepare spinel-type Ni x Al 1-x Mn 2 O 4 (0≤x≤1) compounds to study the effects of solid state properties of mixed oxides on their electrocatalytic properties. The oxalic route, coprecipitation of metal oxalates dissolved in propanol or ethanol, and the propionic route, hydrolysis of metal carboxylates in propionic acid, have been used.

A Novel Method for the Preparation of Nano-sized Nickle ...

A Novel Method for the Preparation of Nano-sized Nickle Powders . By Zhao Han and Hongmin Zhu. Abstract. Abstract. Nano-sized nickel powders were prepared through a wet chemical reduction, of NiCl2 by sodium in liquid ammonia at-45 ºC, and a subsequent heat-treatment in vacuum at 300 ºC. The prepared product was systematically characterized ...

Influence of preparation method on the characteristics of ...

Two series of nickel catalysts supported on sepiolite have been prepared by impregnation and precipitation procedures, and the resultant materials characterised in their reduced states. FTIR of adsorbed CO and X-ray photoelectron spectroscopy (XPS) were used to study the surfaces of the materials and the degree of

Raney Nickel

Preparation of Raney Nickel. In order to prepare Raney nickel, a nickel-aluminium alloy must be prepared first. This can be done by heating aluminium into a molten state and subsequently dissolving nickel into it. This molten mixture must now be cooled in a process known as quenching. The activity of the catalyst can be enhanced by adding small ...

PREPARATION METHOD OF LITHIUM NICKEL MANGANESE …

A preparation method of a lithium nickel manganese oxide cathode material of a battery, comprising steps of: (a) providing a nickel compound, a manganese compound, a first quantity of lithium compound, a second quantity of lithium compound, and a compound containing metallic ions with valence equals to 2, 3, 4 or 5; (b) mixing and stirring the ...

New way of the nickel catalyst preparation for carbon ...

2019-10-25 · Nickel nitrate hexahydrate (Ni(NO 3) 2 •6H 2 O) was used as a catalyst precursor. A new method of preliminary preparation of the catalyst by decomposition of the precursor in alcohol vapor has been proposed. The activity of catalysts obtained by thermal decomposition of the precursor in air (type I) and in alcohol vapor (type II) was compared.

A satisfactory method for the preparation of nickel ...

Kohji Omata, Hitoshi Mazaki, Hiroshi Yagita, Kaoru Fujimoto, Preparation of nickel-on-active carbon catalyst by CVD method for methanol carbonylation, Catalysis …

Study of preparation method and oxidization/reduction ...

2015-12-20 · In this paper, we present a study regarding the effect of catalyst preparation methods and the reduced and oxidized state of the metal on the performance of nickel-cerium oxide catalysts for aqueous-phase reforming of EtOH. 10 wt% metal loaded catalysts were prepared in two different ways; the first one is a direct sol-gel (SG) method and for ...

Preparation of nickel chloride of high purity

2012-2-24 · Preparation of Nickel Chloride of High Purity W. Stanley Clabaugh, John W . Donovan, and Raleigh Gilchrist A method is described for the preparation of cobalt-free nickel chloride, which consists in the repeated precipitation by hydrogen chloride of nickel chloride dihydrate from a mixture

On the Preparation of Nickel Nanoparticles by Chemical ...

Nickel nanoparticles were synthesized by the chemical reduction of NiCl2 with N2H4 under controlled pH environment. During nucleation, polyvinyl pyrrolidone (PVP) was added as the protective agents for preventing the agglomeration of metal clusters. Color of the solution changed from green to blue during the reaction period. X-Ray Adsorption Spectroscopy (XAS), X-Ray Diffraction (XRD), and ...

Effect of method of preparation of a nickel-phosphorus ...

The microstructure of nickel-phosphorus alloys containing 0.7 and 4% P consists of grains of a solid solution of phosphorus in nickel separated by Ni-Ni3P eutectic interlayers. A Ni-11% P alloy has a eutectic structure which is a mixture of nickel-base solid solution and nickel phosphide crystals. Maximum transverse rupture and impact strengths are exhibited by a KKhNF15 material cemented with ...

Preparation and magnetic properties of nano size nickel ...

2012-3-30 · Nickel ferrite, a kind of soft magnetic materials is one of the most attracting class of materials due to its interesting and important properties and has many technical applications, such as in catalysis, sensors and so on. In this paper the synthesis of NiFe2O4 nanoparticles by the hydrothermal method is reported and the inhibition of surfactant (Glycerol or Sodium dodecyl sulfate) on the ...

Useful Method for the Preparation of Low-Coordinate …

This synthetic method for the preparation of nickel(I) amido complexes of the form L−NiI−N(SiMe 3)DIPP appears to be limited only by the ability of the L-donor to support the resulting two- or three-coordinate nickel(I) complex. Strong σ-donors, such as phosphines and N-heterocyclic carbenes, are

Nanomaterials | Free Full-Text | Preparation of Nickel ...

Nickel nanoparticles were prepared by the arc discharge method. Argon and argon/hydrogen mixtures were used as plasma gas; the evaporation of anode material chiefly resulted in the formation of different arc-anode attachments at different hydrogen concentrations. The concentration of hydrogen was fixed at 0, 30, and 50 vol% in argon arc, corresponding to diffuse, multiple, and constricted arc ...

Preparation and Characterization of Nickel ferrite ...

Preparation and Characterization of Nickel ferrite Nanoparticles via Co-precipitation Method 3 over the frequency range 50Hz-5MHz. The NiFe 2 O 4

Electroless nickel plating method for the preparation of ...

I claim: 1. An electroless nickel plating method for the preparation of zirconia ceramic comprising the following steps in the order named: cleaning the surface of the ceramic material of contaminants, rinsing the ceramic material, etching the surface of the ceramic material, rinsing the ceramic material, treating the ceramic with a tin sensitizer solution, rinsing the ceramic material ...

A Method for the Preparation of the Raney Nickel Catalyst ...

2017-3-8 · A Facile Method for the Preparation of Optically Pure β-Diols Kazuhisa Ito, Tadao Harada, Akira Tai The hydrogenation of RCOCH 2 COR over a Raney nickel catalyst modified with a mixture of tartaric acid and NaBr gave ( R *, R * -RCH(OH)CH 2 CH(OH)R selectively with a high optical purity.