Mo(VI) and W(VI) complexes as heterogeneous catalysts for degradation of azo dyes

Abbasi, Alireza; Najafi, Mahnaz; Janczak, Jan; Hecke, Kristof Van

doi:10.1016/j.jece.2018.102865

Cited by 11 publications

(4 citation statements)

References 47 publications

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“…Co powder was treated at 700 °C for 60 min at a heating rate of 5 °C min −1 in air to oxidize cobalt metal to water‐insoluble Co 3 O 4 27. Mo powder was calcined at 500 °C for 60 min at 5 °C min −1 in air in a muffle furnace to produce MoO 3 , owing to its high catalytic activity, as shown in previous work 29. This lower temperature was intended to avoid the rapid and catastrophic oxidation of Mo metal, which produces highly corrosive MoO 3 vapors, at treatment temperatures above 700 °C at a heating rate of 5 °C min −1 in air 30.…”

Section: Methodsmentioning

confidence: 99%

Catalytic Wet Oxidation of Glucose over Oxidized Transition Metal and Alloy Catalysts

et al. 2022

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The catalytic wet oxidation process was used to study the degradation of carbohydrates in wastewater with glucose as a model compound. The transition metals Co and Mo were transformed into their insoluble metal oxide forms, Co3O4 and MoO3. A novel catalyst was prepared by using a CuNiIn alloy, which was oxidized at 700 °C to generate an insoluble CuNiIn mixed oxide. Wet oxidation reactions were performed at 150–210 °C for 60 min at 20 bar O2 pressure. The catalytic performance of the CuNiIn oxide powder reached a reduction in chemical oxygen demand of > 80 %. Molybdenum and cobalt were highly leached into the reaction media, confirming CuNiIn oxide as the best catalyst used in terms of its performance and acetic acid production.

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Section: Methodsmentioning

confidence: 99%

Catalytic Wet Oxidation of Glucose over Oxidized Transition Metal and Alloy Catalysts

et al. 2022

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“…Furthermore, previous reports are have indicated that singlet oxygen ( 1 O 2 ) can quickly react with C=C bonds [35] and these type of catalytic systems mineralize the dyes into inorganic species including CO 2 , NH 4 + , NO 3 , Cl À , and SO 4 2À . [36,37] The role of the absorptive mechanism The absorptive mechanism of nanocluster 1 in the removal of AB10B and MB dyes, was investigated. [37] After the dye removal process, catalyst 1 was extracted from dye suspension by centrifuging and then dried in air and was stirred in methanol for 10 min.…”

Section: Degradation Mechanismmentioning

confidence: 99%

“…[36,37] The role of the absorptive mechanism The absorptive mechanism of nanocluster 1 in the removal of AB10B and MB dyes, was investigated. [37] After the dye removal process, catalyst 1 was extracted from dye suspension by centrifuging and then dried in air and was stirred in methanol for 10 min. The curves of the released AB10B and MB by compound 1 were shown in Figure 10.…”

Section: Degradation Mechanismmentioning

confidence: 99%

Synthesis and characterization of a new polyoxometalate nanocluster containing Mo and V as an environmentally green catalyst for oxidative degradation of organic pollutants from aquatic environments

Naslhajian

Amini

Hosseinifard

et al. 2021

Applied Organom Chemis

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A water-insoluble Keggin-type polyoxomolybdovanadate nanocluster, (Et 4 N) 4 [VMo 12 O 40 ]ÁMeCN (1) was synthesized and crystallized in acetonitrile.The catalyst was characterized by X-ray crystallography, UV-Vis, thermogravimetric analysis (TGA), cyclic voltammetry (CV), and FT-IR techniques. Degradation of organic dyes, Amido black 10B (AB10B) and Methylene blue (MB) was investigated by 1/H 2 O 2 system at room temperature and the influence of different conditions on the decomposition of AB10B and MB dyes such as catalyst dosage, oxidant concentration, pH, radical scavengers, and reusability of 1 were studied.

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“…Along with the deterioration of water quality in environment, the removal of organic pollutants from water has gained much attention in recent years. [ 1–3 ] Photocatalytic degradation of dyes is one of the green and effective methods. Metal oxides, such as TiO 2 and ZnO, are the most common photocatalysts.…”

Section: Introductionmentioning

confidence: 99%

Construction and visible‐light photocatalytic performance of carboxyethyltin/transition metal–functionalized wheel‐like tungstophosphates

Cui

Wang

et al. 2020

Applied Organom Chemis

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The wheel-like tungstophosphate ([P 8 W 48 O 184 ] 40− , abbreviated as P 8 W 48) reacted with estertin trichloride (Cl 3 SnRCH 3 , R = CH 2 CH 2 COO) in aqueous solution, resulting in a new wheel-like polyoxometalate (POM) containing six SnR fragments, formulated as K 6 Na 24 [{(SnR(H 2 O)) 2 (μ-OH)(μ-SnR (H 2 O))} 2 (P 8 W 48 O 184)]Á59H 2 O (abbreviated as Sn 6-P 8 W 48). Based on this, the transition metal (TM) was further introduced into the Sn 6-P 8 W 48 system, selfassembling three other wheel-like POMs with the general formula K x Na y H 26 − x − y [{TM(H 2 O) 3 (SnR(H 2 O)) 2 (μ-OH)(μ-SnR(H 2 O))} 2 (P 8 W 48 O 184)]Á nH 2 O (abbreviated as TM 2-Sn 6-P 8 W 48 , TM = Mn, Co, Ni; x = 0, 1, 2; y = 19, 22, 15; n = 72, 85, 75, respectively). The structures of these new organometal and TM co-modified compounds were characterized using infrared, UV-Vis. spectroscopy, 119 Sn NMR, and powder-and single-crystal X-ray diffraction

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Mo(VI) and W(VI) complexes as heterogeneous catalysts for degradation of azo dyes

Cited by 11 publications

References 47 publications

Catalytic Wet Oxidation of Glucose over Oxidized Transition Metal and Alloy Catalysts

Catalytic Wet Oxidation of Glucose over Oxidized Transition Metal and Alloy Catalysts

Synthesis and characterization of a new polyoxometalate nanocluster containing Mo and V as an environmentally green catalyst for oxidative degradation of organic pollutants from aquatic environments

Construction and visible‐light photocatalytic performance of carboxyethyltin/transition metal–functionalized wheel‐like tungstophosphates

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