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Synthesis Gas Chemistry
Published in Saeed Sahebdelfar, Maryam Takht Ravanchi, Ashok Kumar Nadda, 1 Chemistry, 2022
Saeed Sahebdelfar, Maryam Takht Ravanchi, Ashok Kumar Nadda
Because of its high price, cobalt is usually dispersed on high surface area oxide supports. Cobalt catalysts are typically synthesized by impregnation or precipitation with incipient wetness impregnation of the support with a cobalt salt solution. Cobalt(II) nitrate ( Co(NO3)2 ) is the most commonly used cobalt salt (Khodakov et al., 2007). The next steps are drying, calcination and reduction with H2 . Typical CO loading is 10−30 wt.%. Cobalt is usually poorly dispersed on oxide supports.
Monometallic nano-catalysts for the reduction of perchlorate in water
Published in Matthew Laudon, Bart Romanowicz, 2007 Cleantech Conference and Trade Show Cleantech 2007, 2019
D.M. Wang, H.Y. Lin, C.P. Huang
Perchlorate solution was synthesized by dissolving proper perchlorate salt into distilled water. Distilled water was prepared in the laboratory by a water-purification system (Mega-Pure System, Model MP-290). Sodium perchlorate (> 95%), ammonium perchlorate (> 98%), potassium chlorate (> 98%), sodium chlorite (> 80%) and sodium chloride (>99.5%) were purchased from Sigma-Aldrich (Allentown, PA). All chemicals used for the preparation of catalytic membranes, were supplied by different companies, namely, cadmium (II) perchlorate hydrate (> 99.9%), chromium (III) perchlorate hexahydrate, cobalt (II) nitrate (> 98%), cupric sulfate (> 99%), lead chloride (> 98%), manganese chloride (> 97%), molybdenum (II) acetate (> 98%), palladium chloride (>98%), platinum chloride (> 98%), rhodium (III) chloride hydrate (> 99%), ruthenium chloride hydrate (> 98%), scandium perchlorate (40%), stannous (II) chloride(> 99%), titanium(III) oxide(> 99.9%), vanadium (II) chloride (95%), zirconium(IV) chloride (>99.5%) from Sigma-Aldrich Company (Allentown, PA); Nickel (II) perchlorate (> 99%) from Johnson Matthey Company, (Wayne, PA) and zinc chloride (> 99%) from the Fisher Scientific International Inc.. All chemicals were used as received.
Properties of the Elements and Inorganic Compounds
Published in W. M. Haynes, David R. Lide, Thomas J. Bruno, CRC Handbook of Chemistry and Physics, 2016
W. M. Haynes, David R. Lide, Thomas J. Bruno
Cobalt(II) acetate tetrahydrate Cobalt(II) aluminate Cobalt(III) ammonium tetranitrodiammine Cobalt antimonide Cobalt(II) arsenate octahydrate Cobalt arsenic sulfide Cobalt arsenide (CoAs) Cobalt arsenide [CoAs2] Cobalt arsenide [CoAs3] Cobalt(II) basic carbonate Cobalt boride (CoB) Cobalt boride (Co2B) Cobalt(II) bromate hexahydrate Cobalt(II) bromide Cobalt(II) bromide hexahydrate Cobalt(II) carbonate Cobalt carbonyl Cobalt(II) chlorate hexahydrate Cobalt(II) chloride Cobalt(II) chloride dihydrate Cobalt(II) chloride hexahydrate Cobalt(II) chromate Cobalt(II) chromite Cobalt(II) citrate dihydrate Cobalt(II) cyanide Cobalt(II) cyanide dihydrate Cobalt(II) diiron tetroxide Cobalt disulfide Cobalt dodecacarbonyl Cobalt(II) ferricyanide Cobalt(II) fluoride Cobalt(III) fluoride Cobalt(III) fluoride dihydrate Cobalt(II) fluoride tetrahydrate Cobalt(II) formate dihydrate Cobalt(II) hexafluoro-2,4-pentanedioate Cobalt(II) hexafluorosilicate hexahydrate Cobalt(III) hexammine chloride Cobalt(II) hydroxide Cobalt(III) hydroxide Cobalt(II) hydroxide monohydrate Cobalt(II) iodate Cobalt(II) iodide Cobalt(II) iodide dihydrate Cobalt(II) iodide hexahydrate Cobalt(II) molybdate Cobalt(II) molybdate monohydrate Cobalt(II) nitrate Cobalt(III) nitrate Cobalt(II) nitrate hexahydrate Cobalt(II) nitrite Cobaltocene Cobalt(II) oleate Cobalt(II) orthosilicate Cobalt(II) oxalate Cobalt(II) oxalate dihydrate Cobalt(II) oxide Cobalt(II,III) oxide Cobalt(III) oxide Cobalt(III) oxide monohydrate Cobalt(II) 2,4-pentanedioate Cobalt(III) 2,4-pentanedioate Cobalt(II) perchlorate Cobalt(II) perchlorate hexahydrate
Facile synthesized carbon dots for simple and selective detection of cobalt ions in aqueous media
Published in Cogent Engineering, 2022
Ilham Alkian, Heri Sutanto, B Hadiyanto, Adi Prasetio, Bella Aprimanti Utami
Synthesis of CDots. In this study, various oranges are used as carbon sources. Monoethanolamine (Merck GmbH) is used as passivating agent. Cobalt (II) nitrate hexahydrate (Merch GmbH) is used as a precursor for cobalt ions. To synthesize CDots, 30 mL of extract oranges and 5 mL of MEA were first dissolved in DI water and stirred at 500 rpm for 5 min at room temperature. Then, the solution was put under an ultrasonic wave for 30 min, followed by a microwave for 60 min (Sutanto et al., 2020). The CDots solution was centrifuged at 1500 rpm for 5 min, followed by filtration using filter paper. The absorbance of CDots was measured by using a UV-vis spectrophotometer (Pharo 300 Spectroquant). The functional groups in CDots were analyzed using a Fourier Transform Infra-Red Spectrophotometer (Perkin Elmer Spectrum 2). The fluorescence intensity of CDots was analyzed using Optical Multi Analyser Spectrograph (SA100W-HPCB1024/C) with a diode laser of 405 nm as the excitation source. The morphology and the size of CDots were characterized by transmission electron microscopy (TEM, HT7700, 120 kV). The schematic for the synthesis of CDots and the cobalt ion detection is shown in Figure 1.