Catalytic performance of wrapped CoO by MgO in oxidative degradation of chloroquine phosphate with peroxymonosulfate

2022 ◽  
Vol 573 ◽  
pp. 151430
Author(s):  
Jiabin Dan ◽  
Pinhua Rao ◽  
Qiongfang Wang ◽  
Min Zhang ◽  
Zedi He ◽  
...  
Keyword(s):  
Oxidative Degradation ◽  
Catalytic Performance

Effects of Substituted Transition Metals (Me:Cr3+, Mn3+, Fe3+ and Mo) on the Fe2+/Modified Silica in the Oxidative Degradation of Reactive Black 5

2015 ◽  
Vol 802 ◽  
pp. 531-536 ◽  
Author(s):  
Norhaslinda Nasuha ◽  
B.H. Hameed
Keyword(s):  
Catalytic Activity ◽  
Transition Metals ◽  
Hydroxyl Radicals ◽  
High Stability ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Reactive Black 5 ◽  
Modified Silica

The Fe2+/modified silica catalysts have been substituted with four types of transition metals such as Fe3+, Cr3+, Mn3+ and Mo. The catalytic activity of these catalysts has been tested for the oxidative degradation of Reactive Black 5 (RB5) at 30°C and pH 4.5. The substituted Fe2+/modified silica with Fe3+ (Fe2+:Fe3+/ m-SiO2) exhibited the highest catalytic performance compared to others transition metals by degrading the RB5 nearly to 95%. This catalyst possessed on high stability by maintaining its performance during the three successive cycles of reaction. These findings can be ascribed to the plausible enhancement in the formation of hydroxyl radicals (HO●) due to the effective redox between Fe2+ and Fe3+

Preparation of P(St-co-MAA)/CeO2 composite microspheres via surface carboxyl oxidation followed by in situ chemical deposition of CeO2 and their catalytic application on oxidative degradation of methyl orange

RSC Advances ◽  
2014 ◽  
Vol 4 (55) ◽  
pp. 29042-29049 ◽  
Author(s):  
Guanzhi Cheng ◽  
Xinyi Huang ◽  
Hong Zhang ◽  
Yang Hu ◽  
Chengyou Kan
Keyword(s):  
Methyl Orange ◽  
Oxidative Degradation ◽  
Chemical Deposition ◽  
Catalytic Performance ◽  
Composite Microspheres ◽  
Catalytic Application ◽  
Degradation Of Methyl Orange ◽  
Excellent Catalytic Performance

P(St-co-MAA)/CeO2 composites microspheres were fabricated by a novel and facile approach, exhibiting excellent catalytic performance in oxidative degradation.

Synthesis and Characterization of Zinc Oxide and Evaluation of its Catalytic Activities for Oxidative Degradation of Rhodamine B Dye in Aqueous Medium

2017 ◽  
Vol 231 (9) ◽  
Author(s):  
Muhammad Saeed ◽  
Mohsin Siddique ◽  
Muhammad Usman ◽  
Atta ul Haq ◽  
Samreen Gul Khan ◽  
...  
Keyword(s):  
Zinc Oxide ◽  
Aqueous Medium ◽  
Rhodamine B ◽  
Oxide Catalyst ◽  
Zinc Acetate Dihydrate ◽  
Oxidative Degradation ◽  
Fluid Phase ◽  
Catalytic Performance ◽  
Electron Hole Pair ◽  
Rhodamine B Dye

AbstractWe herein report the synthesis of zinc oxide and evaluation of its catalytic performance for degradation of Rhodamine B dye in aqueous medium. Sodium hydroxide and zinc acetate dihydrate were used as precursor materials for synthesis of zinc oxide catalyst. X-ray difractometry, Fourier transform infer red spectroscopy, scanning electron microscopy, thermogravimetric and surface area analyses were used as characterization techniques. Catalytic performance of prepared zinc oxide was evaluated for degradation of Rhodamine B dye in aqueous medium. Catalytic degradation of dye was taking place according to Eley-Rideal mechanism which states that oxygen adsorbed at the surface of ZnO reacts with dye in fluid phase. During the reaction, reactive radicals are formed as a result of electron-hole pair formation between conduction and valence band of zinc oxide catalyst which degrade the dye into water and carbon dioxide.

Emergence of bismuth substituted cobalt ferrite nanostructures as versatile candidates for the enhanced oxidative degradation of hazardous organic dyes

2018 ◽  
Vol 42 (18) ◽  
pp. 14965-14977 ◽  
Author(s):  
Surbhi Kapoor ◽  
Ankita Goyal ◽  
Sandeep Bansal ◽  
Sonal Singhal
Keyword(s):  
Cobalt Ferrite ◽  
Organic Dyes ◽  
Oxidative Degradation ◽  
Catalytic Performance

The dramatic enhancement in the catalytic performance with the incorporation of 1% bismuth into the cobalt ferrite lattice has been scrutinized for the oxidative degradation of hazardous dyes.

Enhanced catalytic performance of β-FeOOH by coupling with single-walled carbon nanotubes in a visible-light-Fenton-like process

2018 ◽  
Vol 25 (1) ◽  
pp. 9-15 ◽  
Author(s):  
Di Fang ◽  
Yaqun Yu ◽  
Zhihui Xu ◽  
Jiangru Liang ◽  
Lixiang Zhou
Keyword(s):  
Carbon Nanotubes ◽  
Photocatalytic Activity ◽  
Methyl Orange ◽  
Visible Light ◽  
Catalytic Mechanism ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Composite Photocatalysts ◽  
Walled Carbon Nanotubes ◽  
Degradation Of Methyl Orange

AbstractCarbon nanotubes/akaganeite composite photocatalysts (CNTs/β-FeOOH) with different weight addition ratios of CNTs have been synthesized by a very simple hydrothermal method. X-ray diffraction, Fourier transform infrared spectrum, UV-vis diffuse reflectance spectra, scanning electron microscopy, and transmission electron microscope were used to characterize the composite photocatalysts. This study investigates the oxidative degradation of methyl orange, a probe contaminant, by a heterogeneous photo-Fenton-like process over the prepared composite photocatalysts. The CNTs/β-FeOOH composites exhibit remarkably enhanced photocatalytic activity toward the degradation of methyl orange in water under visible light irradiation as compared with bare β-FeOOH. The added CNTs have triple crucial roles in the promotion of photocatalytic activity of β-FeOOH. One is to trap electrons and effectively hinder recombination of the photoexcited carriers. Two is to act as a dispersing support to control the particle size of β-FeOOH in the CNTs/β-FeOOH composites. Three is to enhance the visible light absorption intensity. Finally, the catalytic mechanism of CNTs/β-FeOOH composite is proposed.

Preparation of Fe (III) – Amidoximated PAN Nanofibers Complexes for Degradation of Azo Dye under Visible Light Irradiation

2013 ◽  
Vol 652-654 ◽  
pp. 245-249
Author(s):  
Xue Ting Zhao ◽  
Yong Chun Dong ◽  
Bo Wen Cheng ◽  
Wei Min Kang
Keyword(s):  
Heterogeneous Catalysts ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Nitrile Group ◽  
Electrospinning Technique ◽  
Degradation Reaction ◽  
Decoloration Rate ◽  
Reactive Red 195 ◽  
Degradation Of Azo Dye ◽  
Amidoxime Group

Polyacrylonitrile (PAN) nanofibers were fabricated via electrospinning technique, and the modified Fe-polyacrylonitrile nanofibers photocatalysts(Fe-AO-n-PAN) were prepared by a reaction between PAN nanofibers (AO-n-PAN) containing amidoxime group and ferric chloride. Then Fe-AO-n-PAN were used as heterogeneous catalysts in the oxidative degradation reaction of C.I. Reactive Red 195(RR195) in water. This paper investigated the influences on the degree of the conversion from nitrile group to amidoxime group (CP%); analyzed the impacts on the Fe (III) ions content (QFe-PAN) in Fe-AO-n-PAN; and studied the effects of QFe-PANon the decoloration rate of the dye. The results indicated that the CP% value were greatly enhanced not only with concentration of NH2OH•HCl increasing, but also gradually with the prolongation of reaction time. In addition, the QFe-PANof Fe-AO-n-PAN increases with the rise of CFeand the CP% value. Finally, Fe-AO-n-PAN have remarkable catalytic activity on the degradation of RR 195, and higher QFe-PANcould promote the catalytic performance of Fe-AO-n-PAN.

scholarly journals Oxidative Degradation of Trichloroethylene over Fe2O3-doped Mayenite: Chlorine Poisoning Mitigation and Improved Catalytic Performance

Catalysts ◽  
2019 ◽  
Vol 9 (9) ◽  
pp. 747 ◽  
Author(s):  
Raffaele Cucciniello ◽  
Adriano Intiso ◽  
Tiziana Siciliano ◽  
Antonio Eduardo Palomares ◽  
Joaquín Martínez-Triguero ◽  
...  
Keyword(s):  
Catalyst Deactivation ◽  
Active Catalyst ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Pure Material ◽  
Physico Chemical ◽  
Chlorine Poisoning ◽  
Anionic Species ◽  
Chemical Techniques ◽  
N2 Sorption

Mayenite was recently successfully employed as an active catalyst for trichloroethylene (TCE) oxidation. It was effective in promoting the conversion of TCE in less harmful products (CO2 and HCl) with high activity and selectivity. However, there is a potential limitation to the use of mayenite in the industrial degradation of chlorinated compounds—its limited operating lifespan owing to chlorine poisoning of the catalyst. To overcome this problem, in this work, mayenite-based catalysts loaded with iron (Fe/mayenite) were prepared and tested for TCE oxidation in a gaseous phase. The catalysts were characterized using different physico-chemical techniques, including XRD, ICP, N2-sorption (BET), H2-TPR analysis, SEM-EDX, XPS FESEM-EDS, and Raman. Fe/mayenite was found to be more active and stable than the pure material for TCE oxidation, maintaining the same selectivity. This result was interpreted as the synergistic effect of the metal and the oxo-anionic species present in the mayenite framework, thus promoting TCE oxidation, while avoiding catalyst deactivation.

scholarly journals Degradation of Direct Black 38 dye catalyzed by lab prepared nickel hydroxide in aqueous medium

2016 ◽  
Vol 18 (2) ◽  
pp. 309-320 ◽  
Keyword(s):  
Experimental Data ◽  
Nickel Hydroxide ◽  
Azo Dye ◽  
Oxidative Degradation ◽  
Catalytic Performance ◽  
Effect Of Temperature ◽  
Kinetics Analysis ◽  
Langmuir Hinshelwood Mechanism ◽  
Degradation Reaction ◽  
Time Of Reaction

<div> <p>This study is focused on degradation of Direct Black dye, a common azo dye, catalyzed by nickel hydroxide in aqueous solution. Nickel sulfatehexahydrate, sodium hydroxide and sodium hypochlorite were used for synthesis of nickel hydroxide catalyst. The catalytic performance of nickel hydroxide for oxidative degradation of Direct Black dye was examined in terms of discrete parameters like effect of temperature, concentration of dye, stirring speed, time of reaction etc. Curve Expert software was used for kinetics analysis of batch experimental data. Degradation reaction was taking place according to Langmuir-Hinshelwood mechanism. According to this mechanism the reactants react in adsorbed form at the surface of nickel hydroxide catalyst.&nbsp;</p> </div> <p>&nbsp;</p>

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