Zn(NO3)2·6H2O, (98%) and H2BDC, (98%) were bought from Sigma-Aldrich (Burlington, MA, USA), DMF, (≥99.8%) was purchased from Merck (Darmstdt, Germany), (DABCO, 98%) was purchased from Alfa Aesar (Lancashire, UK). All other compounds used throughout this study were of an analytical grade. The electrochemical experiments were performed using a three-electrode system-CHI model 824B workstation with a screen printed carbon electrode (SPCE)/chemically modified SPCE as a working electrode, Ag/AgCl (in 3 M KCl) as a reference electrode, and Pt wire as an auxiliary electrode. SPCE was purchased from Zensor R&D (Taichung, Taiwan). A phosphate buffer solution (0.1 M, pH 7 PBS) was prepared by mixing 0.1 M, NaH2PO4, and Na2HPO4. To compare the various electrodes performance, 5 mM of FeCN solution used as a probe. Briefly, the FeCN solution was prepared using 5 mM of K3[Fe(CN)6] and K4[Fe(CN)6], and 0.1 M, KCl used as a supporting electrolyte. For H2O2 detection, 100 mM of H2O2 prepared from 9.8 M of H2O2 (30 wt%).
H2bdc
Manufactured by Merck Group
Sourced in United States, Germany
The H2BDC is a laboratory equipment product manufactured by Merck Group. It is a device designed for the measurement and analysis of hydrogen (H2) in various sample types. The core function of the H2BDC is to provide accurate and reliable H2 detection and quantification, without further interpretation or extrapolation on its intended use.
Automatically generated - may contain errors
Lab products found in correlation
N n dimethylformamide (dmf), by Merck Group (2 mentions)
Dabco, by Thermo Fisher Scientific (1 mentions)
Zn no3 2 6h2o, by Merck Group (1 mentions)
N n dimethylformamide (dmf), by Thermo Fisher Scientific (1 mentions)
H2bdc nh2, by Merck Group (1 mentions)
H3btc, by Merck Group (1 mentions)
Sodium hydroxide (naoh), by Samchun (1 mentions)
N n dimethyl formamide dmf, by Samchun (1 mentions)
Methanol, by Samchun (1 mentions)
Zrcl4, by Merck Group (1 mentions)
Acetic acid, by Merck Group (1 mentions)
4 protocols using h2bdc
1
Electrochemical Characterization of Modified Electrodes
2
Synthesis of Ga-Based Metal-Organic Frameworks
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General : Ga(NO3)3 ⋅ xH2O (Alfa Asear, 99 %), HF (Honeywell, 48 % in H2O), dimethylformamide (DMF, Fisher Scientific, 99.5 %), pyridine (py, C5H5N, Alfa Asear. 99 +%) and terephthalic acid (H2bdc, Sigma Aldrich, 98 %) were used as received without any further purification. Laboratory tap water was purified using a Milli‐Q system (18 MΩ cm resistivity at 25 °C) before use.
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3
Synthesis of Metal-Organic Frameworks
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Copper(ii ) nitrate trihydrate (Cu(NO3)2·3H2O), H2BDC, H2BDC-NH2, and H3BTC were procured from Sigma Aldrich, Germany. N,N-dimethyl formamide (DMF), ethanol, methanol, and sodium hydroxide (NaOH) were purchased from Samchun Pure Chemicals, Korea. All the chemicals were of analytical grade and used without any further purification. Highly pure H2S gas (500 ppm balanced with N2 gas) was procured from Union gas, Korea.
4
Synthesis of Defective UiO-66 Metal-Organic Frameworks
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Parent "defect-free" UiO-66 crystals were prepared from a clear solution with a molar ratio of ZrCl 4 (Sigma-Aldrich, ≥99.9% trace metals basis): H 2 BDC (BDC = benzene-1,4-dicarboxylate, Sigma-Aldrich, 98%): DMF (Sigma-Aldrich, anhydrous, 99.8%) = 1:1:500 (or 0.159 g: 0.114 g: 24.9 g according to the weight ratio). 45 For the preparation of defective UiO-66 crystals (d-UiO-66), acetic acid (Sigma-Aldrich, ≥99%) was added as the modulator. The following recipes were used: ZrCl4: H2BDC: DMF: Acid (acetic acid) = 1: 1: 500: x (x = 15, 30, or 70 in terms of molar ratio). The mixture solution was transferred to a stainless steel autoclave and then heated to 150 ℃ for 24 h. The product was washed with fresh DMF by repeated centrifugation and then dried in the oven overnight at 80 ℃. The defective UiO-66 samples synthesized in this work were denoted as d-UiO-66_1 (x = 15), d-UiO-66_2 (x = 30), and d-UiO-66_3 (x = 70), respectively. Parent UiO-66 was prepared with a molar ratio of 1 ZrCl4: 1 H2BDC: 500 DMF. The mixture was heated to 200 ℃ and kept for 48 h in order to complete the crystallization. The product was washed with fresh DMF repeatedly and then dried at 80 ℃overnight. All samples were then stored in a drying desiccator cabinet before use.
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