Degradation of nitro-aromatic explosives using recyclable magnetic photocatalyst: Catalyst synthesis and process optimization

Rezaei-Vahidian, Hadi; Zarei, Ali Reza; Soleymani, Ali Reza

doi:10.1016/j.jhazmat.2016.12.001

Cited by 61 publications

(23 citation statements)

References 37 publications

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“…However, a complete degradation was not achieved under 420 min irradiation: a challenge reported in several other studies (San et al, 2002 ; Hassan et al, 2014 ; Dong et al, 2015 ; Rezaei-Vahidian et al, 2017 ). To achieve a complete degradation, we repeated the photocatalytic degradation for multiple runs, under the same condition with freshly prepared catalysts at each repetition.…”

Section: Resultsmentioning

confidence: 91%

Photocatalytic Degradation of 4-Nitrophenol by C, N-TiO2: Degradation Efficiency vs. Embryonic Toxicity of the Resulting Compounds

et al. 2018

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The photocatalytic activity of TiO2 based photocatalysts can be improved by structural modification and elemental doping. In this study, through rational design, one type of carbon and nitrogen co-doped TiO2 (C, N-TiO2) photocatalyst with mesoporous structure was synthesized with improved photocatalytic activity in degrading 4-nitrophenol under simulated sunlight irradiation. The photocatalytic degradation efficiency of the C, N-TiO2 was much higher than the anatase TiO2 (A-TiO2) based on absorbance and HPLC analyses. Moreover, using zebrafish embryos, we showed that the intermediate degradation compounds generated by photocatalytic degradation of 4-nitrophenol had higher toxicity than the parent compound. A repeated degradation process was necessary to render complete degradation and non-toxicity to the zebrafish embryos. Our results demonstrated the importance of evaluating the photocatalytic degradation efficiency in conjunction with the toxicity assessment of the degradation compounds.

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Section: Resultsmentioning

confidence: 91%

Photocatalytic Degradation of 4-Nitrophenol by C, N-TiO2: Degradation Efficiency vs. Embryonic Toxicity of the Resulting Compounds

et al. 2018

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“…To demonstrate the applicability of the method, the developed method was applied to the determination of nitroaromatic explosives in some red and yellow water after removal of NACs which was treated by our team by advanced oxidation process based on mineralization . The concentrations of the detected analytes are listed in Supporting Information Table S3.…”

Section: Resultsmentioning

confidence: 99%

Deep eutectic solvent based magnetic nanofluid in the development of stir bar sorptive dispersive microextraction: An efficient hyphenated sample preparation for ultra‐trace nitroaromatic explosives extraction in wastewater

Zarei

Nedaei

Ghorbanian

2017

J of Separation Science

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A deep eutectic solvent based magnetic nanofluid was coupled with stir bar sorptive dispersive microextraction as a hyphenated sample preparation technique. The neodymium core magnetic stir bar was coated physically with nanofluid of magnetic carbon nanotube nanocomposites and deep eutectic solvents. The prepared nanofluid has magnetic and strong sorbing properties and is compatible with gas chromatography. In this nanofluid, the deep eutectic solvent acts simultaneously as both carrier and stabilizer for magnetic nanotubes. The predominant experimental variables affecting the extraction efficiency of nitroaromatic compounds were evaluated. Under the optimized conditions, the limit of detection and enrichment factor were in the range of 0.2-4.9 ng/L and 852-1480, respectively. The relative standard deviations were between 5.6 and 10.2% (n = 6). Method validation was performed by both spiking-recovery method and comparison of results with other methods. Finally, the proposed method was successfully applied for the extraction and pre-concentration of nitroaromatic explosives in water samples, followed by determination by gas chromatography with micro-electron capture detection.

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“…Although enhanced recyclability has been achieved by most PODS photocatalysts, the recovery process is still restrained by the repeated, time‐consuming powder collection and washing procedure [121–123] . Therefore, current material synthetic methods need to be optimized on the materials’ magnetic, hydrophile–lipophile, and particularly free‐standing properties, which can allow them to be easily separated from the pollutant solutions via electrical/magnetic fields, natural sedimentation, and direct collection [124–126] . In short, for future PODS evaluation, we should not only emphasize their cycling performance but pay attention to the easy‐to‐recycle recovery techniques, which would provide more constructive guidance for practical application.…”

Section: Solutions To Podsmentioning

confidence: 99%

Desulfurization through Photocatalytic Oxidation: A Critical Review

et al. 2020

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Fuel oil, the most important strategic resource, has been widely used in industrial applications. However, the sulfur‐containing compounds in fuel oil also present humanity with huge environmental issues and health concerns due to the hazardous combustion waste. To address this problem, the low vulcanization of fuel production technology has been intensively explored. Compared with traditional hydrodesulfurization technology, the newly emerged photocatalytic desulfurization has the advantages of milder operating conditions, lower energy consumption, and higher efficiency, holding great prospect to achieve deep desulfurization. Though great efforts have been made, the desulfurization catalysts still suffer from inferior light absorption, fast recombination of photocarriers, and poor structure modification. This Review summarizes recent development of photocatalytic desulfurization, including the desulfurization principle, current desulfurization challenges, and corresponding solutions. Particularly, the roles of defect engineering, hybrid coupling, and structure modifications in the enhancement of photocatalytic performance are emphasized. In addition, the photocatalytic desulfurization mechanism is also introduced with the .OH and .O2− radicals as main active species. Finally, some perspectives on the photocatalytic desulfurization are provided, which can further optimize the desulfurization efficiency and guide future photocatalyst design.

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Degradation of nitro-aromatic explosives using recyclable magnetic photocatalyst: Catalyst synthesis and process optimization

Cited by 61 publications

References 37 publications

Photocatalytic Degradation of 4-Nitrophenol by C, N-TiO2: Degradation Efficiency vs. Embryonic Toxicity of the Resulting Compounds

Photocatalytic Degradation of 4-Nitrophenol by C, N-TiO2: Degradation Efficiency vs. Embryonic Toxicity of the Resulting Compounds

Deep eutectic solvent based magnetic nanofluid in the development of stir bar sorptive dispersive microextraction: An efficient hyphenated sample preparation for ultra‐trace nitroaromatic explosives extraction in wastewater

Desulfurization through Photocatalytic Oxidation: A Critical Review

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