Efficient degradation of orange II by ZnMn2O4 in a novel photo-chemical catalysis system

Ni, Qingzhuo; Cheng, Hao; Ma, Jianfeng; Kong, Yong; Komarneni, Sridhar

doi:10.1007/s11705-019-1907-z

Cited by 12 publications

(5 citation statements)

References 50 publications

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“…Insoluble Ti(OH) 4 is formed upon the addition of the precipitant to the reaction system; the precipitate is collected by filtration and washed to remove the anions from the original solution. TiO 2 powders with various crystal forms can be obtained by calcination at various high temperatures [109][110][111][112][113].…”

Section: Precipitation Methodsmentioning

confidence: 99%

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Yang

Chen

et al. 2022

Catalysts

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While modern industry has contributed to the prosperity of an increasingly urbanized society, it has also led to serious pollution problems, with discharged wastewater and exhaust gases causing significant environmental harm. Titanium dioxide (TiO2), which is an excellent photocatalyst, has received extensive attention because it is inexpensive and able to photocatalytically degrade pollutants in an environmentally friendly manner. TiO2 has many advantages, including high chemical stability, low toxicity, low operating costs, and environmental friendliness. TiO2 is an N-order semiconductor material with a bandgap of 3.2 eV. Only when the wavelength of ultraviolet light is less than or equal to 387.5 nm can the valence band electrons obtain the energy of the photons and pass through the conduction band and form photoelectrons, while the valence band, correspondingly, forms photogenerated holes, and light in other areas will not be generated. The most common methods used to improve the photocatalytic efficiency of TiO2 involve increasing its photoresponse range and reducing photogenerated-carrier coupling. The morphology, size, and structure of a heterojunction can be altered through element doping, leading to improved photocatalytic efficiency. Mainstream methods for preparing TiO2 are reviewed in this paper, with several excellent preparation schemes for improving the photocatalytic efficiency of TiO2 introduced. TiO2 is mainly prepared using sol-gel, solvothermal, hydrothermal, anodic oxidation, microwave-assisted, CVD and PVD methods, and TiO2 nanoparticles with excellent photocatalytic properties can also be prepared. Ti-containing materials are widely used to purify harmful gases, as well as contaminants from building materials, coatings, and daily necessities. Therefore, the preparation and applications of titanium materials have become globally popular research topics.

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Section: Precipitation Methodsmentioning

confidence: 99%

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Yang

Chen

et al. 2022

Catalysts

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“…This indicates that all of the components of Orange (II) dye were broken down. According to the report of the experiment by Ni et al, ZnMn 2 O 4 was used as a photocatalyst to degrade Orange by 90% . In our study, GC–MS analysis was also used to track the end products of degradation of Orange (II) dye (Scheme ).…”

Section: Results and Discussionmentioning

confidence: 94%

“…According to the report of the experiment by Ni et al, ZnMn 2 O 4 was used as a photocatalyst to degrade Orange by 90%. 15 In our study, GC–MS analysis was also used to track the end products of degradation of Orange (II) dye ( Scheme 1 ). Individual metal efficacies of Fe@SBA-15 and W@SBA-15 catalysts were found to be less than that of the bimetallic W-Fe@SBA-15 catalyst.…”

Section: Results and Discussionmentioning

confidence: 99%

Development of a Sustainable Tungsten and Iron Bimetal-Immobilized SBA-15 Composite for Enhanced Wet Catalytic Oxidation of Dye Capacity

Patel

Mayani²,

Mayani

2022

ACS Omega

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In this study, wet catalytic decomposition of Orange (II) dye was carried out with tungsten and iron bimetalincorporated mesoporous SBA-15 (W-Fe@SBA-15) under visible light. The synthesized hybrid composite material was characterized by physicochemical methods, powder X-ray diffraction (PXRD) spectroscopy, scanning electron microscopy combined with energy-dispersive X-ray (SEM−EDX) spectroscopy studies, Fourier transform infrared (FT-IR) spectroscopy, transmission electron microscopy (TEM), atomic force microscopy (AFM), thermogravimetric analysis (TGA), and surface property studies to understand the nature of the dye degradation process and for catalytic studies. The maximum degradation of Orange (II) dye measured by a UV−visible spectrophotometer was 99% at a contaminant volume of 2.7 × 10 −4 mol/L and a catalyst quantity of 2 g/ L in 140 min reaction time. Using gas chromatography−mass spectrometry (GC−MS), the final products were chemically identified. The mechanistic steps of the process were carried out through a series of experiments. The recyclability of the catalyst added a novel feature for such a heterogeneous catalysis that can reduce secondary pollutants in water with no leaching effect observed.

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“…3 (b)), the ZnM 2 O 4 has a strong signal at 2θ = 36.4°, this signal corresponds to plane (211) JCPDS file No. 77–0470 [ 70 ]. If ZnM 2 O 4 is present in a very small load the signal could be overlapped by the PPG ZnO wurtzite peaks (2θ = 36.27°).…”

Section: Results and Discussion (1)mentioning

confidence: 99%

Improvement of the photocatalytic activity of ZnO thin films doped with manganese

Vallejo,

Cantillo,

Díaz-Uribe

2023

Heliyon

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Efficient degradation of orange II by ZnMn2O4 in a novel photo-chemical catalysis system

Cited by 12 publications

References 50 publications

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Preparation and Photocatalytic Activities of TiO2-Based Composite Catalysts

Development of a Sustainable Tungsten and Iron Bimetal-Immobilized SBA-15 Composite for Enhanced Wet Catalytic Oxidation of Dye Capacity

Improvement of the photocatalytic activity of ZnO thin films doped with manganese

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