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20 protocols using cu no3 2 3h2o

1

Dopamine-Functionalized Silica Nanoparticles

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Tannic acid and dopamine·HCl were purchased from Sigma-Aldrich. Tetraethoxysilane (TEOS), ammonium hydroxide, Cu(NO3)2·3H2O, Fe(NO3)3·9H2O, Cd(NO3)2·4H2O, Mg(NO3)2·6H2O and Cr(NO3)3·9H2O were purchased from Meryer, China. Ethanol was purchased from Sinopharm Chemical Reagent Co., Ltd. A standard stock solution (1 g/L) of Cu2+ was prepared by dissolving Cu(NO3)2·3H2O in deionized water. The desired Cu2+ solutions (10~100 mg L−1) were prepared by diluting the standard stock solution. All other reagents were of AR grade and used as received.
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2

Electrochemical Lead Detection with Graphene Oxide

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Graphene oxide (GO, 99 wt%) was purchased from Sigma-Aldrich. l-Cysteine (analytical reagent, purity ≥ 99.8%) in this study was obtained from Chinese Institutes for Food and Drug Control. All other chemicals, such as PbNO3, Cu(NO3)2·3H2O, Cu(Ac)2·3H2O, KNO3, K3Fe(CN)6, K4Fe(CN)6, NiSO4·7H2O, Cd(NO3)2·4H2O, and Zn(NO3)2·6H2O, were of analytical grade purity (purity ≥ 99.5%) and provided from Sinopharm Chemical Reagent Co., Ltd. Unless otherwise stated, the buffer solution is a 0.1 M KNO3 (pH 5.0). The deionized water was used for all the experiments. And the used all solutions were deoxygenated by nitrogen. CuO nanoneedles/N-doped reduced Graphene oxide (NN-CuO/N-rGO) was synthesized according to our former report.17 (link) Total solution volume used in Pb2+ detection tests was 10 mL in electrolytic cell.
All the electrochemical experiments were executed on a CHI660e electrochemical workstation (Shanghai Chenhua Instrument, China) with a conventional three-electrode system. The l-Cys/NN-CuO/N-rGO modified electrode was used as the working electrode. An Ag/AgCl and a platinum wire electrode were used as a reference electrode and auxiliary electrode, respectively. Scanning electron microscopy (SEM) was conducted on a JSM-6700F scanning electron microscope (Japan Electron Company, Japan).
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3

Synthesis and Characterization of Metal Nitrate Compounds

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Reagents, such as Cu(NO3)23H2O, Co(NO3)26H2O, Al(NO3)39H2O, Na2CO3 and NaOH, were bought from Sinopharm Chemical Reagent Co. Ltd. (Shanghai, China), and used as received without further purification. Deionized water (Millipore Milli-Q system, resistivity ≥ 18.2 MΩ·cm) was used for the preparation of all solutions. Acetylene black, polyvinylidene fluoride (PVDF) and N–methylpyrrolidone (NMP) solution were purchased from KEJING Star Technology Co. Ltd. (Shenzhen, China). Nafion® 117 membrane was obtained from Saosi Chemical Instrument Co., Ltd. (Hangzhou, China). Copper foil was bought from Amamda Hardware Trading Co., Ltd. (Shenzhen, China). After receipt, it was washed by ethanol for the removal of oil and grease, polished with 3000 mesh sandpaper and finally washed with distilled water. The pre-treated copper foil was dried in the shade for future use.
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4

Fabrication of Cu-Co Sulfide Catalysts

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All the reagents are of analytical grade. Co(NO3)2·6H2O, Cu(NO3)2·3H2O, Na2S and urea were supplied by Sinopharm Chemical Reagent Co. Ltd (Beijing, China).
The as-pressed nickel foam substrates with 2 × 2 cm2 in size were cleaned in HCl solution and deionized water for each 15 min under ultrasonication. Typically, 1 mmol of Cu(NO3)2·3H2O, 2 mmol of Co(NO3)2·6H2O and 9 mmol of urea were dissolved in 35 mL of deionized water under magnetic stirring for 30 min. The solution was poured in 50 mL Teflon-lined stainless steel autoclave with a pretreated and weighted Ni foam, and then maintained at 120 °C for 4 h. Subsequently, the as-synthesized Cu–Co precursor loaded on Ni foams were ultrasonically cleaned with water for 1 min. The Cu–Co precursor was annealed at 350 °C in air for 2 h in order to fabricate Cu–Co oxide. The Cu–Co sulfides were prepared by the sulfuration of Cu–Co precursor or Cu–Co oxide with 10 mL 0.1 M sodium sulfide at 120 °C for 6 h. The Cu–Co sulfide obtained from precursor was recorded as P–Cu–Co sulfide, while the sulfide from Cu–Co oxide was marked as O–Cu–Co sulfide.
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5

Synthesis of Bi-Cu Layered Double Hydroxides

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All reactants and solvents were analytical grade and used without further purification. Bi(NO3)3·5H2O, Cu(NO3)2·3H2O, Na2CO3, NaOH, HNO3, gluconic acid, tert-butanol (t-BuOH), para-benzoquinone (BZQ), disodium ethylenediaminetetr-aacetate (Na2-EDTA), ethanol, and diclofenac sodium were obtained from Sinopharm Chemical Reagent Co., Ltd., (Shanghai, China). Ultrapure water was used throughout this study.
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6

Electrochemical CO2 Reduction Catalyst

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3-Amino phenol (A.R.), hexamethylene tetramine (A.R.), Cu(NO3)2·3H2O (A.R.), SbCl3 (A.R.), ethanol (A.R.) and KHCO3 (A.R.) were purchased from Sinopharm Chemical Reagent Co. Ltd; F127 (Shanghai Aladdin Reagents Co. Ltd); Nafion® 117 solution (5%, Dupont); Nafion 117 membrane (Dupont); Carbon paper (CP, HCP010, Shanghai Hesen Electrical Co. Ltd); CO2 and N2 (99.99%, Shanghai Dumaoai Purifying Gas Co. Ltd).
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7

Quantitative Biosensing via Nanomaterials

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CMC (M.W. 250000) was purchased from Aladdin Industrial Corporation (Shanghai, China). Pb(NO3)2 and Cu(NO3)2·3H2O were bought from Sinopharm Chemical Reagents Co., Ltd. (Beijing, China). AA (99.7%), UA, HAuCl4·3H2O (99.9%), GC, LA, Glu and dopamine hydrochloride were commercially obtained from Alfa Aesar (Beijing, China). IgG, anti-IgG and BSA (standard grade) were obtained from Xinjingke Biotechnology Co., Ltd. (Beijing, China). Clinical human serum samples were provided by Capital Normal University Hospital (Beijing, China). All other reagents were used as received. Deionized-distilled water was purified by Olst ultrapure K8 apparatus (Olst, Ltd., resistivity > 18 MΩ cm).
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8

Removal of Heavy Metal Ions

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All chemicals were of analytical grade and used directly without further purification. Sodium sulfide (Na2S), sodium hydroxide (NaOH), sodium borohydride (NaBH4) and 4-NP (99%) were purchased from Tianjin Chemical Reagents Co. (Tianjin, China). Stock solutions of heavy metal ions (1000 mg l−1) were prepared from Cu(NO3)2·3H2O and AgNO3 provided by Sinopharm Chemical Reagent Co., Ltd. (Shanghai, China). Standard solutions of copper, silver (100 µg ml−1) for the atomic absorption spectrophotometer were from Beijing National Institute of Standard Material P.R. China. Deionized water was used for all the experiments. The pH of the solution was adjusted using 0.1 M NaOH or 0.1 M HNO3 solution.
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9

Synthesis of Metal-Doped SAPO-34 Zeolites

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Fe(NO3)3·9H2O, Cu(NO3)2·3H2O, NaOH, Na2CO3, (NH4)2CO3, Zn(NO3)2·6H2O, Zr(NO3)2·5H2O and FeCl3 were analytical grade and purchased from Sinopharm Chemical Reagent Co., Ltd. FeCl2·4H2O and acetaldehyde aqueous solution (35%) were purchased from Sigma-Aldrich. SAPO-34 zeolites was purchased from Nankai University Catalyst Co., Ltd.
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10

Synthesis of Copper-based Nanoparticles

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Colloidal silica (Ludox-HS 40, SiO2 40 wt % aqueous solution), methanol and tetraethyl orthosilicate were purchased from Alfa Aesar Chemical Reagent Co. Ltd. (Tianjin, China). Cu(NO3)2·3H2O, DMO, CuCl2·2H2O, ammonium chloride, ethanol, N-hexadecyltrimethylammonium bromide and ammonia aqueous solution (25%~28%) were purchased from Sinopharm Chemical Reagent Co. Ltd. (Shanghai, China). Cu powder was purchased from Tianjin Guangfu Fine Chemical Co., Ltd. Deuterium gas (99.999%) was purchased from Chengdu Keyuan Gas Co. Ltd. All reagents were used as received without further purification. Water used in the studies was ultrapure water (Millipore, ≥18 MΩ cm).
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