Facile pH-controlled synthesis of MnWO4 nanoparticles and nanorods and their heterogeneous Fenton-like catalytic activity

Jiang, Zhikang; Shen, Li; Ge, Ting; Zhang, Yongcai

doi:10.1016/j.matlet.2021.129662

Cited by 10 publications

(4 citation statements)

References 13 publications

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“…Figure b shows the FE-SEM images of different concentrations of Mn in Mn x WO 4 to discern the surface morphology. The formation of nanorod structures was observed with pure MnWO 4 , which are 100–200 nm in length and 40–65 nm in width . By increasing Mn concentration, the sequential array of rods into micro flower-like structures was observed with Mn 1.25 WO 4 .…”

Section: Resultsmentioning

confidence: 94%

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Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Prabu

Manikandan

Samal

et al. 2023

ACS Appl. Nano Mater.

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Activation of the C−H bond in cyclohexane (CYH) and methane is a crucial step to obtain desirable oxygenated products using nanostructured catalyst and is a great challenge and an efficient route to mitigate the inauspicious effects of climate change. The active sites were identified using XRD, HR-TEM, SEM, N 2 sorption analysis, TPR, Raman, XPS, TGA, in situ DRIFT, XAS, etc. In optimal reaction conditions, 46% of CYH was converted into adipic acid (AA) on Mn x WO 4 nanostructures within 6 h. The recyclability test confirmed the catalyst heterogeneity, which revealed no appreciable loss of catalytic activity even after three consecutive reactions. In situ DRIFT study reveals that CYH is oxidized to cyclohexanone and cyclohexanol (KA oil) and is further oxidized to AA via carboxylate intermediates. DFT studies disclosed that MnOx species are responsible for the C−H activation of CYH, and the Mn 2+/ Mn 3+ redox centers play a vital role in the absorption of KA oil to form AA. Herein, we demonstrated the significant role of the "MnOx" species and that adequate Lewis and Bronsted acidic sites, redox centers of (Mn 2+ /Mn 3+ ), and lattice oxygen are accountable for the CYH conversion toward the AA. Additionally, we have reported the oxidation of methane to methanol (146 μmole per gram of catalyst) in the presence of water at 75 °C without over-oxidation products.

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Section: Resultsmentioning

confidence: 94%

“…The formation of nanorod structures was observed with pure MnWO 4 , which are 100−200 nm in length and 40−65 nm in width. 34 By increasing Mn concentration, the sequential array of rods into micro flowerlike structures was observed with Mn 1.25 WO 4 . The widths of the rod formed are in the range of 54−75 nm.…”

Section: Resultsmentioning

confidence: 96%

Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Prabu

Manikandan

Samal

et al. 2023

ACS Appl. Nano Mater.

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“…The diffraction peaks are distributed at 15.3°, 18.2°, 23.5°, 29.9°, 35.6°, 37.1°, 40.5°, 43.9°, 48.1°, 52.8°, 60.8°, and 63.6°, corresponding to the (010), (100), (011), (111), (002), (120), (−102), (121), (−112), (221), (113), and (132) crystal planes of MnWO 4 , respectively. 19,20 From the absence of impurity peaks, it can be confirmed that the synthesized powder is pure phase MnWO 4 . The wide XRD peaks are mainly due to small particle sizes and low crystallinity.…”

mentioning

confidence: 74%

“…011), ( 111), (002), ( 120), (À102), ( 121), (À112), ( 221), (113), and (132) crystal planes of MnWO 4 , respectively. 19,20 From the absence of impurity peaks, it can be confirmed that the synthesized powder is pure phase MnWO 4 . The wide XRD peaks are mainly due to small particle sizes and low crystallinity.…”

mentioning

confidence: 77%

Breaking the barrier: a MnWO₄ photocatalyst enables solar chlorine production from seawater without noble metals

et al. 2023

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CuWO4|MnWO4 heterojunction thin film with improved photoelectrochemical and photocatalytic properties using simulated solar irradiation

Lima

Assis

Resende

et al. 2022

J Solid State Electrochem

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Facile pH-controlled synthesis of MnWO4 nanoparticles and nanorods and their heterogeneous Fenton-like catalytic activity

Cited by 10 publications

References 13 publications

Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Breaking the barrier: a MnWO₄ photocatalyst enables solar chlorine production from seawater without noble metals

CuWO4|MnWO4 heterojunction thin film with improved photoelectrochemical and photocatalytic properties using simulated solar irradiation

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Facile pH-controlled synthesis of MnWO4 nanoparticles and nanorods and their heterogeneous Fenton-like catalytic activity

Cited by 10 publications

References 13 publications

MnxWO4 Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

MnxWO4 Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Breaking the barrier: a MnWO4 photocatalyst enables solar chlorine production from seawater without noble metals

CuWO4|MnWO4 heterojunction thin film with improved photoelectrochemical and photocatalytic properties using simulated solar irradiation

Contact Info

Product

Resources

About

Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Mn_xWO₄ Nanostructure-Based Catalysts for Single-Step Oxidation of Cyclohexane and Methane to Oxygenates

Breaking the barrier: a MnWO₄ photocatalyst enables solar chlorine production from seawater without noble metals