36 g of Ni(NO3)2.6H2O (Sigma-Aldrich) was added to 18 mL of EG (C2H6O2) (Sigma-Aldrich) and ultra-sonicated for 1 hour. After that the resultant mixture was poured into a cylindrical crystalline glass dish, which was pre-heated to a temperature of 300 °C for 30 minutes by using a hot plate in the ambient atmosphere. A sudden introduction of reactants in to the hot glass dish leads to the evolution of NO2 gas bubbles and subsequent production of fluffy Ni sponge. Cobalt oxide (Co3O4) sponge was prepared by the reaction of Co(NO3)2.6H2O (36 g) and EG (18 mL) by using the same procedure mentioned above for Ni sponge. The same synthesis route is followed for the preparation of Ni-Co alloy sponges. Here reactants Ni(NO3)2.6H2O and Co(NO3)2.6H2O (sigma-Aldrich), were mixed together taking a total amount of 36 g in the weight ratio of 1:1, 1:2 and 2:1 and the resulting sponges named as Ni1Co1, Ni1Co2 and Ni2Co1. For the synthesis of Ni-NG, 36 g of Ni(NO3)2.6H2O (Sigma-Aldrich) and 100 mg of NG(prepared by heating GO with melamine (1:5 ratio) for 3 hrs at 800 °C)51 (link) were added to 18 mL of EG (C2H6O2) (Sigma-Aldrich) and ultra-sonicated for 1 hour. The resultant mixture was poured in to a cylindrical dish preheated for 1 hour leads to the formation of Ni-NG sponges.
Ni no3 2 6h2o
Manufactured by Merck Group
Sourced in Germany, United States, United Kingdom, India
Ni(NO3)2·6H2O is a chemical compound that consists of nickel, nitrate, and water molecules. It is a green crystalline solid that is commonly used as a laboratory reagent and in various industrial applications.
Automatically generated - may contain errors
Lab products found in correlation
Co no3 2 6h2o, by Merck Group (22 mentions)
Zn no3 2 6h2o, by Merck Group (15 mentions)
Sodium hydroxide (naoh), by Merck Group (11 mentions)
Fe no3 3 9h2o, by Merck Group (11 mentions)
Cu no3 2 3h2o, by Merck Group (9 mentions)
Ce no3 3 6h2o, by Merck Group (6 mentions)
Ethanol, by Merck Group (6 mentions)
Nano3, by Merck Group (5 mentions)
Hydrochloric acid (hcl), by Merck Group (5 mentions)
Agno3, by Merck Group (5 mentions)
Mn no3 2 4h2o, by Merck Group (4 mentions)
Mg no3 2 6h2o, by Merck Group (4 mentions)
Potassium chloride (kcl), by Merck Group (4 mentions)
Cd no3 2 4h2o, by Merck Group (4 mentions)
Pb no3 2, by Merck Group (4 mentions)
Methanol, by Merck Group (3 mentions)
H2so4, by Merck Group (3 mentions)
Citric acid, by Merck Group (3 mentions)
Al no3 3 9h2o, by Merck Group (3 mentions)
Hgcl2, by Merck Group (3 mentions)
97 protocols using ni no3 2 6h2o
1
Spongy Ni, Co and Ni-Co Alloy Synthesis
2
Preparation and Characterization of NiO and Cu:NiO Films
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NiO and Cu:NiO films were prepared by spin-coating. The precursor
solution for NiO was prepared by dissolving 0.3 M Ni(NO3)2·6 H2O (99.999%, Sigma-Aldrich) and
polyvinyl acetate (0.05 g/mL, Sigma-Aldrich) into methanol (Sigma-Aldrich,
>99.9%). The precursor solution was aged for more than 1 day prior
to spin-coating. For the Cu:NiO precursor, the total concentration
of Ni(NO3)2·6H2O and Cu(NO3)2 (>99%, Sigma-Aldrich) together was 0.3 M.
The
precursor solution was spin-coated onto a cleaned FTO substrate (cleaned
by acetone, isopropanol, and ethanol) (fluorine-doped tin oxide, Biotain
crystal) in two spinning steps: 0 rpm for 10 s and 3000 rpm for 20
s. After spin-coating of each layer, the films were dried at 300 °C
in air for 10 min. The thicknesses of the NiO and Cu:NiO films were
controlled by repeating the spin-coating and drying processes for
three times. The films were finally calcined at 450 °C in air
for 60 min. The as-prepared NiO and Cu:NiO films were soaked in 0.3
mM 4-(bis-4-[5-(2,2-dicyano-vinyl)-thiophene-2-yl]-phenyl-amino)-benzoic
acid (P1) dye solution in ethanol overnight (∼16 h) and washed
by ethanol.
solution for NiO was prepared by dissolving 0.3 M Ni(NO3)2·6 H2O (99.999%, Sigma-Aldrich) and
polyvinyl acetate (0.05 g/mL, Sigma-Aldrich) into methanol (Sigma-Aldrich,
>99.9%). The precursor solution was aged for more than 1 day prior
to spin-coating. For the Cu:NiO precursor, the total concentration
of Ni(NO3)2·6H2O and Cu(NO3)2 (>99%, Sigma-Aldrich) together was 0.3 M.
The
precursor solution was spin-coated onto a cleaned FTO substrate (cleaned
by acetone, isopropanol, and ethanol) (fluorine-doped tin oxide, Biotain
crystal) in two spinning steps: 0 rpm for 10 s and 3000 rpm for 20
s. After spin-coating of each layer, the films were dried at 300 °C
in air for 10 min. The thicknesses of the NiO and Cu:NiO films were
controlled by repeating the spin-coating and drying processes for
three times. The films were finally calcined at 450 °C in air
for 60 min. The as-prepared NiO and Cu:NiO films were soaked in 0.3
mM 4-(bis-4-[5-(2,2-dicyano-vinyl)-thiophene-2-yl]-phenyl-amino)-benzoic
acid (P1) dye solution in ethanol overnight (∼16 h) and washed
by ethanol.
3
Arsenic Analysis in Human Milk by GF-AAS
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Arsenic (As) analysis in human milk samples was carried out by graphite furnace atomic absorption spectroscopy (GF-AAS) (Perkin Elmer, Model Analyst 800) with Zeeman background correction and high energy electrode-less discharge lamps. The matrix modifier for As analysis consisted of a solution containing 1% (w/v) Ni(NO3)2▪6H2O and 0.1% Triton X-100. High purity (99.99%) Ni(NO3)2.6H2O, 2% (w/v) (Sigma-Aldrich Co., USA) in 18 MΩcm-1 water was used throughout the analysis.
Calibration standards were prepared fresh daily using a 1000 mg/l standard As solution (Perkin-Elmer Co., USA) and 0.1% Triton X-100 as diluent. For As analysis the matrix modifier consists of 1% Ni(NO3)2.6H2O (Sigma-Aldrich Co., USA), 0.1% Triton X-100 (Fisher Scientific Co., USA). For As analysis, sample and matrix modifiers are co-injected in the graphite furnace.
All samples, method blanks, quality control (QC) standards were loaded in an auto sampler tray (AS 60) (Perkin-Elmer Co., USA) in the GF-AAS system. The minimum detection level with this method was 0.50 μg/l for both urine and breast milk.
Calibration standards were prepared fresh daily using a 1000 mg/l standard As solution (Perkin-Elmer Co., USA) and 0.1% Triton X-100 as diluent. For As analysis the matrix modifier consists of 1% Ni(NO3)2.6H2O (Sigma-Aldrich Co., USA), 0.1% Triton X-100 (Fisher Scientific Co., USA). For As analysis, sample and matrix modifiers are co-injected in the graphite furnace.
All samples, method blanks, quality control (QC) standards were loaded in an auto sampler tray (AS 60) (Perkin-Elmer Co., USA) in the GF-AAS system. The minimum detection level with this method was 0.50 μg/l for both urine and breast milk.
4
CCVD Synthesis of Carbon Nanotubes
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For the CCVD synthesis the following materials were used: n‐butylamine (Sigma Aldrich; as the carbon source), Ni(NO3)2×6H2O (Merck) and MgO (Sigma Aldrich) for preparation of CCVD catalyst. The purification of nanotubes was performed with 37 wt % cc. HCl (VWR). Nitric acid, 67 wt % (VWR) and sulfuric acid, 98 wt % (VWR) were used for functionalization of BCNTs. During of application gelled BCNT spheres sodium alginate (Sigma Aldrich) and CaCl2 (Merck) were used. The hydrogenation catalysts were synthetized from the following precursors: PdCl2 (Alfa Aesar), [(CH3CO2)2Rh]2 (Sigma Aldrich), Ni(NO3)2×6H2O (Merck).
5
Nickel Determination with Interference
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All chemicals were of analytical reagent grade. Ni(NO3)2•6H2O was supplied from Merck and a 1000 mg L -1 stock solution of Ni(II) was prepared by dissolving 0.495 g of Ni(NO3)2•6H2O in 100 mL of deionized water. Standard solutions (1000 mg L -1 ) of the cations used in the interference study were prepared from salts supplied from Sigma-Aldrich, Merck and Riedel-de Haen depends on elements.
6
Synthesis of Metal Nitrate Complexes
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Fe(NO3)3·9H2O, Ni(NO3)2·6H2O and Co.(NO3)2·6H2O were purchased from Sigma-Aldrich. Isopropyl alcohol, glycerol and ethanol were purchased from Sinopharm Chemical Reagent Co., Ltd. All purchased chemicals were directly used. Ultrapure water used throughout the experiments was obtained from a MilliQ water purification system.
7
Synthesis and characterization of Ni-Mo-W/AC catalysts
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Chemicals used in the
study were of analytical
grade and used as received. The activated carbon (AC) support was
obtained from Merck, Germany. Ni(NO3)2·6H2O (99%), (NH4)6Mo7O24·4H2O (>99%), (NH4)6H2W12O40·xH2O, and (NH4)2HPO4 were purchased
from Sigma-Aldrich. Dichloromethane, di-n-butylether
(DBE), nitric acid, acetone, and THF were obtained from Boom B.V.
Hydrogen (>99.99%), nitrogen (>99.8%), and 2% O2/Ar
were
purchased from Hoekloos. Indulin-AT (Kraft lignin) was from MWV specialty
chemicals and provided by the Wageningen University and Research Center,
The Netherlands (Dr. R. Gosselink). Indulin-AT is a purified form
of Kraft pine lignin. The lignin content is 97 wt % on dry basis;
the remainder is mainly ash. The elemental compostion is as follows:
C = 61.87 wt %, H = 5.98 wt %, N = 0.69 wt %, S = 1.34 wt %, O = 30.12
wt %. The molecular weight is reported to be about 4000 g/mol.55 (link)
study were of analytical
grade and used as received. The activated carbon (AC) support was
obtained from Merck, Germany. Ni(NO3)2·6H2O (99%), (NH4)6Mo7O24·4H2O (>99%), (NH4)6H2W12O40·xH2O, and (NH4)2HPO4 were purchased
from Sigma-Aldrich. Dichloromethane, di-n-butylether
(DBE), nitric acid, acetone, and THF were obtained from Boom B.V.
Hydrogen (>99.99%), nitrogen (>99.8%), and 2% O2/Ar
were
purchased from Hoekloos. Indulin-AT (Kraft lignin) was from MWV specialty
chemicals and provided by the Wageningen University and Research Center,
The Netherlands (Dr. R. Gosselink). Indulin-AT is a purified form
of Kraft pine lignin. The lignin content is 97 wt % on dry basis;
the remainder is mainly ash. The elemental compostion is as follows:
C = 61.87 wt %, H = 5.98 wt %, N = 0.69 wt %, S = 1.34 wt %, O = 30.12
wt %. The molecular weight is reported to be about 4000 g/mol.55 (link)
8
Synthesis and Characterization of Transition Metal-Doped Carbon Nanofibers
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All solvents and reagents throughout the current study were commercially pure products and used as received without any further purification. Manganese acetate, Mn (CH3COO)2, nickel nitrate hexahydrate, Ni (NO3)2·6H2O, and ammonium dibasic phosphate, (NH4)2HPO4, were purchased from Sigma Aldrich-United Kingdom. Deionized water was used to prepare all the solutions and rinse the electrodes during the experiment. The carbon nanofibers (CNFs), OD: 200–600 nm was ordered from the US Research Nanomaterials, Inc., Houston, USA. CNFs material was manufactured by CVD technique and has high purity >95 wt%. It possesses a tap density of 0.043 g cm−3 and a high electrical conductivity of 100 S cm−1. Also, potassium hydroxide, urea, Nafion, and formaldehyde 37–38% w/w STB MT, Nafion (5% water) were obtained from Pan Rec Applichem.
9
Quantification of Metal Ions via ICP-OES
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A solution containing 5 g/L Ni2+ ions was prepared from a solution of Ni(NO3)2.6H2O (Sigma-Aldrich) in a volumetric flask with deionized water. The working solution was carried out by appropriate dilutions with varying concentration (mg/L) of the mother solution at a given pH. Other metals solutions were prepared in the same way from solutions of Co(NO3)2.6H2O, Cr(NO3)3.9H2O and Mn(NO3)2.4H2O respectively.
An Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES 730ES Varian) was used to analyze metal ions concentrations in experimental aqueous solutions. A reference scale of Ni2+ solutions at known concentrations was realized in the range among 0.005–20 mg/L as a calculus base for the ICP-OES to determine further concentrations. Samples with an initial Ni2+ concentration higher than 20 mg/L were prepared by adequate dilution to avoid any error during the analyzing process.
An Inductively Coupled Plasma Optical Emission Spectrometry (ICP-OES 730ES Varian) was used to analyze metal ions concentrations in experimental aqueous solutions. A reference scale of Ni2+ solutions at known concentrations was realized in the range among 0.005–20 mg/L as a calculus base for the ICP-OES to determine further concentrations. Samples with an initial Ni2+ concentration higher than 20 mg/L were prepared by adequate dilution to avoid any error during the analyzing process.
10
Ni-Supported Catalyst Preparation
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In total, 2 g of support were purged in a quartz reactor with nitrogen for 10 min at room temperature, then reduced with H2 flow for 3 h at a temperature of 300 °C. After reduction, the sample was left to cool with hydrogen until reaching room temperature, and the reactor was purged with N2 for 30 min. The solution of Ni(NO3)2.6H2O (Sigma-Aldrich) was added to 20 mL of distilled water, adding the necessary amount of the salt to obtain 15 wt% of Ni loading. Subsequently, it was purged with N2 for 10 min in the degassing area to eliminate traces of oxygen. To carry out the reaction, the nickel solution was aggregated to the reactor where the ATZX support was located, and N2 was bubbled for one hour. The prepared monometallic catalyst was dried with H2 at room temperature for 12 h. Finally, it was activated with a flow of H2 at a temperature of 400 °C for 4 h using a heating ramp of 2 °C/min.
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