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7 protocols using nickel nitrate

1

Synthesis of Copper-Nickel Telluride Nanoparticles

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Copper nitrate (Cu(NO3)2·3H2O, 99–104%, Sigma-Aldrich), nickel nitrate
(Ni(NO3)2·6H2O, 98%, Alfa Aesar),
telluric acid (H6O6Te, 98%, Sigma-Aldrich),
sodium hydroxide (NaOH, 97%, Sigma-Aldrich), absolute ethanol (EtOH,
99.5%, ETAX), and deionized water were used in the present work. All
reactants were used as received, without any further purification.
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2

Synthesis and Characterization of Nanomaterials

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Zinc nitrate (98%), sodium
hydroxide (98%), nickel nitrate (98%), sodium borohydride (98%), rhodamine
B, methyl orange, methylene blue, 4-nitrophenol (99%), 2-nitrophenol
(98%), and 2-nitroaniline (98%) were purchased from Alfa Aesar, and
silver nitrate (>99.5%) was bought from Merck. These materials
were
utilized as precursors without further purification. Deionized water
was used for the preparation of solutions and in all the experiments.
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3

Synthesis of Metal-Organic Framework

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2,5-dihydroxyterephthalic acid (H2DOBDC), nickel nitrate (Ni(NO3)2·6H2O, 99.9%), and nickel hydroxide (Ni(OH)2, 98%) were provided by Alfa Aesar. Other chemicals such as potassium peroxydisulfate (K2S2O8, 95%), sodium hydroxide (NaOH, >98%), N, N-dimethyl formamide (DMF), were purchased from Sinopharm Chemical Reagent Co. Ltd. All the chemicals were used as received without further purification. All aqueous solutions were performed in deionized water with a resistivity of 18.2 MΩ cm.
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4

Perovskite Solar Cell Fabrication

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Nickel nitrate (99.9985%), ethylenediamine (99%), Cs2CO3 (99.9%), CsI (99.9%), PbI2 (99.9985%), and 2,9-Dimethyl-4,7-diphenyl-1,10-phenanthroline (BCP, 98%) were purchased from Alfa Aesar. Ethylene glycol (99%), ethyl acetate (99.8%), hexane (95%), oleylamine (OAm, 80–90%), methylammonium chloride (MACl, 98%), N, N-dimethyl formamide (DMF, 99.5%), dimethyl sulfoxide (DMSO, 99.5%), and toluene (99.5%) were obtained from Echo Chemcial. Octane (99 +%) and 1-Octadecene (ODE, 90%) were purchased from Acros Organics. Methylammonium bromide (MABr, 99.999%) and methylammonium iodide (MAI, 99.999%) were obtained from Luminescence Technology. Oleic acid (OA, 88%), formamidinium iodide (FAI, 99.9%), fullerene-C60 (99.95%), Ag (99.9%), and patterned FTO-coated glass substrates (8 Ω sq−1) were obtained from SHOWA, STAREK Scientific, Uni-Onward, Ultimate Materials Technology, and Ruilong.
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5

Biodiesel Production from Waste Cooking Palm Oil

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The analytical reagents; nickel nitrate [Ni(NO3)2·6H2O], polyethylene glycol [PEG, C2nH4n+2On+1, Mn = 4000 g mol−1], methanol (CH3OH; ≥99.5%), and ethanol (C2H6O; ≥99.5%) were purchased from Fisher Scientific. Urea [CO(NH2)2], d-glucose (C6H12O6), and ammonium sulphate [(NH4)2SO4; ≥99.5%] were purchased from Sigma-Aldrich. The standard methyl esters for GC analysis, consist of heptadecanoate, methyl palmitate, methyl oleate, methyl myristate, methyl stearate, and methyl linoleate were provided by fluke, USA.
The WCPO containing 17.0% FFA was supplied by local market, Malaysia. All the physicochemical characteristics of the WCPO are characterized by AOCS method and summarized in Table 1. From GC-MS analysis, the used oil contained five major FFAs including palmitic acid (C16:0, 34.80%), linoleic acid (C18:2, 12.59%), oleic acid (C18:1, 42.78%), stearic acid (C18:0, 7.13%), and myristic acid (C14:0, 2.70%).
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6

Sensitive Metal-Ion Detection Using DNAzymes

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The Pb2+-specific DNAzyme (Pb-Sub: 5′-/5Cy3/ACT CAC TAT rAGG AAG AGA TG -3′ and Pb-Enz: 5′-CAT CTC TTC TCC GAG CCG GTC GAA ATA GTG AGT-3′) and the Cu2+-specific DNAzyme (Cu-Sub: 5′-TTT TTT TTT TAG CTT CTT TCT AAT ACrG GCT TAC C/36-FAM/-3′ and Cu-Enz: 5′-GGT AAG CCT GGG CCT CTT TCT TTT TAA GAA AGA AC-3′) were synthesized and purified by Integrated DNA Technologies, Inc. (IDT) (Coralville, IA). Graphene oxide (GO), phytic acid (PA), Tris base and ascorbic acid (AA) were obtained from Sigma-Aldrich (St. Louis, MO). Cupric nitrate (Cu(NO3)2, 99%), lead acetate (Pb(CH3COOH)2, 98.0%), manganese nitrate (Mn(NO3)2, 99%), magnesium nitrate (Mg(NO3)2, 99%), cadmium nitrate (Cd(NO3)2, 99%), nickel nitrate (Ni(NO3)2, 99%), cobalt nitrate (Co(NO3)2, 99%), ferric nitrate (Fe(NO3)3, > 98.0%), zinc nitrate (Zn(NO3)2, 99%), magnesium chloride (MgCl2, 99%), potassium chloride (KCl, 99%), nitric acid (HNO3,) were purchased from Fisher Scientific (Waltham, MA). All the reagents were used as received without further purification. All experiments and measurements were carried out at room temperature unless otherwise stated. Deionized water (18.4 MΩ) used for all experiments was obtained from a Milli-Q system (Millipore, Bedford, MA).
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7

Waste Cooking Palm Oil Characterization

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The analytical chemicals polyethylene glycol [PEG, Mn = 4000 g mol−1], nickel nitrate [Ni(NO3)2·6H2O], and methanol (CH3OH; ≥99.5%) were acquired from Fisher Scientific. d-Glucose (C6H12O6), ammonium sulphate [(NH4)2SO4; ≥99.5%], and urea [CO(NH2)2] were acquired from Sigma-Aldrich. The basic methyl esters for gas chromatography (GC) analysis (heptadecanoate, methyl-myristate, methyl-stearate, methyl-linoleate, methyl-palmitate, and methyl-oleate) were delivered by Fluka, USA.
The WCPO [holding 17.0% FFAs, acid value of 34.0 mg KOH per g, saponification value of 171.0 mg KOH per g, density (15 °C) of 0.91 g cm−3, and kinematic viscosity (40 °C) of 33.0 mm2 s−1] was obtained from a local market, Malaysia. The supplied WCPO contained five most important FFAs including myristic acid (C14:0, 2.70%), stearic acid (C18:0, 7.13%), linoleic acid (C18:2, 12.59%), palmitic acid (C16:0, 34.80%), and oleic acid (C18:1, 42.78%).
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