Anthracene-9-carboxaldehyde, 1,3-diaminopropane, nickel nitrate
, tetra butyl ammonium salts of anions, Nitroaromatic compounds and other chemicals are purchased from Sigma-Aldrich, India and used without further purification.
Weidner, "The effect of current and nickel nitrate
concentration on the deposition of nickel hydroxide films," Journal of the Electrochemical Society, vol.
The Ni/CNT catalyst was obtained via wet impregnation of CNTs with nickel nitrate
. The CNTs with ethanol were placed in a three-necked flask connected with a reflux condenser and sonicated for 5 minutes in an ultrasound bath.
Aluminum nitrate nonahydrate, Al[(N[O.sub.3]).sub.3].9[H.sub.2]O (Sigma Aldrich) and nickel (III) nitrate, Ni[(N[O.sub.3]).sub.2].6[H.sub.2]O (Acros Organics) were mixed with octyl alcohol and lauric acid (Cognis Oleochemicals (M) Sdn Bhd) to form a mixture solution with molar ratio of 2:1 aluminum nitrate to nickel nitrate
obtained from stoichiometric equation.
Raw materials Formulation Molecular Purity weight % (g/mol) Iron (III) Fe 404.00 99 nitrate nonahydrate [(N[O.sub.3]).sub.3.9] [H.sub.2]O Nickel nitrate
Ni 290.79 99.5 hexahydrate [(N[O.sub.3]).sub.2.6] [H.sub.2]O Zinc nitrate Zn 297.4815 99 hexahydrate [(N[O.sub.3]).sub.2.6] [H.sub.2]O Polyvinylpyrrolidone [([C.sub.6] 30 k 99.9 [H.sub.9]NO).sub.n] N,N- [C.sub.3][H.sub.8] 73.8 99.9 dimethylformamide DMF [O.sub.2] Raw materials Physical Origin state manufacturing Iron (III) Solid China nitrate nonahydrate Nickel nitrate
Solid China hexahydrate Zinc nitrate Solid China hexahydrate Polyvinylpyrrolidone Solid China N,N- Liquid India dimethylformamide DMF Table 2: Structural parameters of [Ni.sub.1- x][Zn.sub.x][Fe.sub.2][O.sub.4] calcinated at 700[degrees]C.
Stoichiometric amounts of zinc acetate-2-hydrate [[Zn(C[H.sub.3]COO).sub.2] x 2[H.sub.2]O] (Fluka99.5%) and nickel nitrate
Ni[(N[O.sub.3]).sub.2] x 6[H.sub.2]O (Aldrich 98%) or, respectively, Fe(N[O.sub.3])3-9[H.sub.2]O (Aldrich 98%) were each dissolved in 20 mL propanol ([C.sub.3][H.sub.8]O) by magnetic stirring at room temperature.
Iron nitrate and nickel nitrate
1,000-ppm (1-mg/mL) standard solutions were purchased from EM Science (Gibbstown, New Jersey) and Absolute Standards, Inc.
They are nickel powder, nickel sulphate, nickel chloride, nickel carbonate and nickel nitrate
. Nickel powder (T; R48-23) has been classified in chronic toxicity classification as per environmental risk assessment report on nickel.
The boiled tubules in a bath of nitric acid and nickel nitrate
, baked them in an oven, and then cooked them some more in superheated helium.
NiO thin films were prepared from a solution of nickel nitrate
hexahydrate [Ni([NO.sub.3])2, 6[H.sub.2]O].
The Ni-based catalysts were prepared by incipient wetness impregnation method, described as follows: nickel nitrate
hexahydrate (Sinopharm Chemical Reagent Co., Ltd) and ferric nitrate nonahydrate (Sinopharm Chemical Reagent Co., Ltd) were dissolved in deionized water, followed by the addition of [gamma]- [Al.sub.2][O.sub.3]; the slurry was continuously stirred at room temperature for 24 h and then dried at 120[degrees] C for 12 h and calcined at 450[degrees]C for 4 h in muffle oven; and the obtained sample was reduced at 550[degrees] C for 6h in a flow of 25% [H.sub.2] diluted with nitrogen.
The Solution in which nickel deposition was induced, include acetate buffer with PH=4 and in voltage 0.8-volt nickel for 5 minutes with 2 mmol L acetate buffer solution pH = 4 within nickel nitrate
, was deposited on a graphite electrode.