Fabrication, characterization and photocatalytic activity of cubic-like ZnMn2O4

Zhao, Ling; Li, Xinyong; Zhao, Ji

doi:10.1016/j.apsusc.2012.12.078

Cited by 63 publications

(18 citation statements)

References 17 publications

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“…The ZnMn 2 O 4 exhibited an absorption band between the 250 and 600 nm. This absorption behavior is characteristic of the ZnMn 2 O 4 spinel and is in agreement with previous reports [57,58,59]. In order to calculate the band gap energy, Tauc´s formula was used [60,61].…”

Section: Resultssupporting

confidence: 87%

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Morán-Lázaro

Guillén-López

López–Urías

et al. 2018

Sensors

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Spinel-type ZnMn2O4 nanoparticles were synthesized via a simple and inexpensive microwave-assisted colloidal route. Structural studies by X-ray diffraction showed that a spinel crystal phase of ZnMn2O4 was obtained at a calcination temperature of 500 °C, which was confirmed by Raman and UV-vis characterizations. Spinel-type ZnMn2O4 nanoparticles with a size of 41 nm were identified by transmission electron microscopy. Pellet-type sensors were fabricated using ZnMn2O4 nanoparticles as sensing material. Sensing measurements were performed by exposing the sensor to different concentrations of propane or carbon monoxide at temperatures in the range from 100 to 300 °C. Measurements performed at an operating temperature of 300 °C revealed a good response to 500 ppm of propane and 300 ppm of carbon monoxide. Hence, ZnMn2O4 nanoparticles possess a promising potential in the gas sensors field.

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Section: Resultssupporting

confidence: 87%

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Morán-Lázaro

Guillén-López

López–Urías

et al. 2018

Sensors

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“…Figure 4d also shows the XPS spectra (spin-orbit doublet peaks) of the Mn2p (3/2) and Mn3p (1/2) regions found with semiconductor doped Mn 2 O 3 -ZnO NPs. The binding energy of the Mn3p (3 / 2) and Mn3p (1/2) peak at 644.7 eV and 655.3 eV respectively indicates the existence of Mn since their bindings energies are similar [75]. In Figure 4e, the spin-orbit peaks of the Zn2p (1/2) and Zn2p (3/2) binding energy for codoped Mn 2 O 3 -ZnO NPs appeared at around 1025.7 eV and 1048.9 eV respectively, which is in good conformity with the reference data for Zn [76].…”

Section: Resultsmentioning

confidence: 99%

Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes

Rahman

Grüner

Alghamdi

et al. 2013

Chemistry Central Journal

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BackgroundSemiconductor doped nanostructure materials have attained considerable attention owing to their electronic, opto-electronic, para-magnetic, photo-catalysis, electro-chemical, mechanical behaviors and their potential applications in different research areas. Doped nanomaterials might be a promising owing to their high-specific surface-area, low-resistances, high-catalytic activity, attractive electro-chemical and optical properties. Nanomaterials are also scientifically significant transition metal-doped nanostructure materials owing to their extraordinary mechanical, optical, electrical, electronic, thermal, and magnetic characteristics. Recently, it has gained significant interest in manganese oxide doped-semiconductor materials in order to develop their physico-chemical behaviors and extend their efficient applications. It has not only investigated the basic of magnetism, but also has huge potential in scientific features such as magnetic materials, bio- & chemi-sensors, photo-catalysts, and absorbent nanomaterials.ResultsThe chemical sensor also displays the higher-sensitivity, reproducibility, long-term stability, and enhanced electrochemical responses. The calibration plot is linear (r2 = 0.977) over the 0.1 nM to 50.0 μM 4-nitrophenol concentration ranges. The sensitivity and detection limit is ~4.6667 μA cm-2 μM-1 and ~0.83 ± 0.2 nM (at a Signal-to-Noise-Ratio, SNR of 3) respectively. To best of our knowledge, this is the first report for detection of 4-nitrophenol chemical with doped Mn2O3-ZnO NPs using easy and reliable I-V technique in short response time.ConclusionsAs for the doped nanostructures, NPs are introduced a route to a new generation of toxic chemo-sensors, but a premeditate effort has to be applied for doped Mn2O3-ZnO NPs to be taken comprehensively for large-scale applications, and to achieve higher-potential density with accessible to individual chemo-sensors. In this report, it is also discussed the prospective utilization of Mn2O3-ZnO NPs on the basis of carcinogenic chemical sensing, which could also be applied for the detection of hazardous chemicals in ecological, environmental, and health care fields.

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“…It is noteworthy that an obvious absorption in the visible light region was observed for LiMg 0 5 Mn 0 5 O 2 , but the absorption is broad with lack of sharpness, which is a characteristic absorption of the manganese containing compounds. [10][11][12][13] The color of the photocatalyst is also dark brown as it can be expected from the absorption spectrum. The bandgap energy of LiMg 0 5 Mn 0 5 O 2 can be calculated by the plot of the transformed Kubelka-Munk function of light energy ( h 1/2 versus photon energy The surface morphology of the synthesized LiMg 0 5 Mn 0 5 O 2 was investigated using scanning electron microscopy, which is equipped with energy dispersive spectra (EDS) for elemental analysis as presented in Figure 3.…”

Section: Characterizationsmentioning

confidence: 99%

Degradation of mixed dyes in aqueous wastewater using a novel visible light driven LiMg_0.5Mn_0.5O₂ photocatalyst

Veldurthi¹,

Palla²,

Velchuri³

et al. 2015

mat express

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A simple and modified sol-gel method was employed for the synthesis of LiMg 0.5 Mn 0.5 O 2 and it was further investigated as the photocatalyst under visible light irradiation. LiMg 0.5 Mn 0.5 O 2 was characterized using various analytical techniques in order to understand its phase confirmation, optical properties, morphology and chemical composition. The color of the LiMg 0.5 Mn 0.5 O 2 was dark brown as it could be expected from its absorption spectrum. The bandgap energy of LiMg 0.5 Mn 0.5 O 2 was estimated as 1.42 eV and therefore it would respond under visible light. The photocatalytic activity of LiMg 0.5 Mn 0.5 O 2 was assessed based on the mixed aqueous solutions containing methylene blue (MB) and methyl orange (MO) under visible light. The photocatalyst showed preferential decomposition of MO in comparison to MB in the mixed dye solution. Different scavenger tests were carried out to detect the reactive species, responsible for the degradation of dyes and the possible photocatalytic degradation mechanism was also discussed.

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Fabrication, characterization and photocatalytic activity of cubic-like ZnMn2O4

Cited by 63 publications

References 17 publications

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes

Degradation of mixed dyes in aqueous wastewater using a novel visible light driven LiMg_0.5Mn_0.5O₂ photocatalyst

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Fabrication, characterization and photocatalytic activity of cubic-like ZnMn2O4

Cited by 63 publications

References 17 publications

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Synthesis of ZnMn2O4 Nanoparticles by a Microwave-Assisted Colloidal Method and their Evaluation as a Gas Sensor of Propane and Carbon Monoxide

Chemo-sensors development based on low-dimensional codoped Mn2O3-ZnO nanoparticles using flat-silver electrodes

Degradation of mixed dyes in aqueous wastewater using a novel visible light driven LiMg0.5Mn0.5O2 photocatalyst

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Degradation of mixed dyes in aqueous wastewater using a novel visible light driven LiMg_0.5Mn_0.5O₂ photocatalyst