scholarly journals The degradation of methylene blue by microcubes catalyst -Fe2O3 via heterogenous Fenton process

2021 ◽  
pp. 35-40
Author(s):  
Ngo Thi My Binh Ngo
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Prussian Blue ◽  
Rate Constant ◽  
Spectroscopic Methods ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Sem Images ◽  
Catalytic Materials ◽  
Fenton System

Cubic Fe2O3 was synthesized in a facile approach by annealing molecular organic framework Prussian Blue (PB) at 350oC, 550oC, and 650oC. The final product was characterized by IR, Raman and XRD spectroscopic methods illustrating the presence of pure a-Fe2O3. SEM images of this material revealed a homogeneous morphology of microcube Fe2O3 with a size of about 500 nm. The catalytic activity of cubic Fe2O3 was investigated on the degradation of methylene blue in a heterogeneous Fenton system. It was shown that the thermally oxidative decomposition of PB at 550oC has resulted in porous Fe2O3 which exhibited highest MB degradation efficiency. In the presence of 0.5 M H2O2 and 0.3 g/L Fe2O3 at pH = 3.59, 50 ppm MB in studied solution has been removed at a rate constant of 0.0398 min-1, which is comparable with other analogous catalytic materials.

scholarly journals Enhanced heterogeneous Fenton-like degradation of methylene blue by reduced CuFe2O4

RSC Advances ◽  
2018 ◽  
Vol 8 (2) ◽  
pp. 1071-1077 ◽  
Author(s):  
Qingdong Qin ◽  
Yahong Liu ◽  
Xuchun Li ◽  
Tian Sun ◽  
Yan Xu
Keyword(s):  
Hydrogen Peroxide ◽  
Methylene Blue ◽  
Catalytic Activity ◽  
Heterogeneous Fenton ◽  
Activation Of Hydrogen Peroxide

CuFe2O4 was reduced for activation of hydrogen peroxide and the reduced CuFe2O4 showed a relatively higher catalytic activity.

Nanoscale zero-valent iron incorporated with nanomagnetic diatomite for catalytic degradation of methylene blue in heterogeneous Fenton system

2016 ◽  
Vol 73 (11) ◽  
pp. 2815-2823 ◽  
Author(s):  
Yiming Zha ◽  
Ziqing Zhou ◽  
Haibo He ◽  
Tianlin Wang ◽  
Liqiang Luo
Keyword(s):  
Methylene Blue ◽  
Chemical Reduction ◽  
Nitrogen Adsorption ◽  
Catalytic Degradation ◽  
Zero Valent Iron ◽  
Precipitation Method ◽  
Heterogeneous Fenton ◽  
Nanoscale Zero Valent Iron ◽  
Co Precipitation ◽  
Fenton System

Nanoscale zero-valent iron (nZVI) incorporated with nanomagnetic diatomite (DE) composite material was prepared for catalytic degradation of methylene blue (MB) in heterogeneous Fenton system. The material was constructed by two facile steps: Fe3O4 magnetic nanoparticles were supported on DE by chemical co-precipitation method, after which nZVI was incorporated into magnetic DE by liquid-phase chemical reduction strategy. The as-prepared catalyst was characterized by scanning electron microscopy, Fourier-transform infrared spectroscopy, X-ray diffraction, magnetic properties measurement and nitrogen adsorption–desorption isotherm measurement. The novel nZVI@Fe3O4-diatomite nanocomposites showed a distinct catalytic activity and a desirable effect for degradation of MB. MB could be completely decolorized within 8 min and the removal efficiency of total organic carbon could reach to 90% after reaction for 1 h.

Recyclable Fe3O4/Au Nanocomposites for Oxidation Degradation of Methylene Blue in Near Neutral Solution

NANO ◽  
2019 ◽  
Vol 14 (10) ◽  
pp. 1950122
Author(s):  
Yan Xing ◽  
Xiao-Hui Bai ◽  
Ming-Li Peng ◽  
Xiang-Rong Ma ◽  
Norbert Buske ◽  
...  
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Catalytic Activity ◽  
Rate Constant ◽  
Nanocrystalline Structure ◽  
Neutral Solution ◽  
Au Nps ◽  
Transmission Electron ◽  
Interaction Interface ◽  
Growth Method

Fe3O4/Au nanocomopsites (Fe3O4/Au NPs) with much improved catalytic activity were successfully fabricated through a simple seed growth method in aqueous solution. The petal-like structure, high saturation magnetization, the negatively charged sodium citrate-stabilized Fe3O4/Au NPs was characterized by transmission electron microscopy (TEM), X-ray diffractometer (XRD), dynamic light scattering (DLS) and vibrating sample magnetometry (VSM). The activated-H2O2 ability of Fe3O4/Au NPs was evaluated by using methylene blue (MB) as a cationic phenothiazines dye to be degraded in near neutral solution. The results showed Fe3O4/Au NPs removed over 95% MB from an aqueous solution within 60[Formula: see text]min under the optimum conditions. The apparent rate constant of Fe3O4/Au NPs was [Formula: see text][Formula: see text]min[Formula: see text] which was 43.2 and 8.3 times higher than pure Fe3O4 ([Formula: see text][Formula: see text]min[Formula: see text] and Au ([Formula: see text][Formula: see text]min[Formula: see text] NPs. The enhanced catalytic activity and increased oxidation rate constant probably owing to the synergistic effect between Fe3O4 and Au NPs to activate H2O2 generate a large amount of strong oxidizing species, such as [Formula: see text]. In addition, nanocrystalline structure of Fe3O4/Au NPs was also very important to the peroxidase-like effect, especially the interaction interface between Fe3O4 and Au NPs. Moreover, Fe3O4/Au NPs was stable and could be regenerated and reused for at least five cycles.

Degradation of methylene blue using a heterogeneous Fenton process catalyzed by ferrocene

2013 ◽  
Vol 51 (28-30) ◽  
pp. 5821-5830 ◽  
Author(s):  
Qian Wang ◽  
Senlin Tian ◽  
Jie Cun ◽  
Ping Ning
Keyword(s):  
Methylene Blue ◽  
Fenton Process ◽  
Heterogeneous Fenton

Degradation of Methylene Blue by Fenton-Like Reaction

2014 ◽  
Vol 1065-1069 ◽  
pp. 3127-3130 ◽  
Author(s):  
Gang Chao Zhu ◽  
Jian Xin Shou ◽  
Jia Wei Qian ◽  
Hua Zheng Xin ◽  
Mu Qing Qiu
Keyword(s):  
Aqueous Solution ◽  
Methylene Blue ◽  
Catalytic Activity ◽  
Optimal Condition ◽  
Influencing Factors ◽  
Catalyst Concentration ◽  
Degradation Efficiency ◽  
Heterogeneous Fenton

In order to enhance the catalytic activity of the heterogeneous Fenton-like reaction, the catalyst of Fe3O4 composites was synthesized. The Fe3O4 was used as catalyst of the heterogeneous Fenton-like reaction to degrade methylene blue in aqueous solution. The influencing factors, such as pH, initial H2O2 concentration, dye concentration and catalyst concentration, were investigated. The results showed that the dye was effectively degraded at pH 3-8. The optimal condition was at pH3.5. The degradation efficiency of dye increased with the increase of the initial H2O2 concentration and reached maximum when the H2O2 concentration was 15 mmol/L. The degradation efficiency of dye increased with the catalyst concentration was 650 mg/L. The coexisted anions decreased the degradation efficiency of dye.

Effects of niobium and molybdenum impregnation on adsorption capacity and Fenton catalytic activity of magnetite

RSC Advances ◽  
2015 ◽  
Vol 5 (106) ◽  
pp. 87535-87549 ◽  
Author(s):  
Shima Rahim Pouran ◽  
A. R. Abdul Aziz ◽  
Wan Mohd Ashri Wan Daud ◽  
Mohammad Saleh Shafeeyan
Keyword(s):  
Catalytic Activity ◽  
Adsorption Capacity ◽  
Fenton Process ◽  
Heterogeneous Fenton

Nb and Mo co-incorporation could effectively improve magnetite properties towards higher adsorption and remarkable activity in heterogeneous Fenton process.

scholarly journals Fabrication of Ag and Ni Nanocatalyst with Enhanced Efficiency

2015 ◽  
Vol 2015 ◽  
pp. 1-4 ◽  
Author(s):  
Tajamal Hussain ◽  
Mira Tul Zubaida Butt ◽  
Mirza Nadeem Ahmed ◽  
Muhammad Hamid Raza ◽  
Zahoor Hussain Farooqi ◽  
...  
Keyword(s):  
Methylene Blue ◽  
Catalytic Activity ◽  
Chemical Reduction ◽  
Average Particle Size ◽  
Blue Dye ◽  
Average Particle ◽  
Ag Nps ◽  
Sem Images ◽  
First Case ◽  
Supported Ni

Metal nanoparticles (NPs) have received significant attention in last decade because of their unique properties. In this work, two different metal NPs have been prepared and their catalytic activities are compared with conventional catalyst. In first case, Ag NPs were synthesized by chemical reduction method in ethanolic medium. Synthesized Ag NPs were characterized by scanning electron microscope (SEM) images which indicated an average particle size of Ag around 250 nm. The catalytic activity of Ag NPs was investigated for the oxidative mineralization of methylene blue dye. Comparative studies suggested that Ag NPs possess enhanced catalytic activity compared to bulk Ag. In second approach, supported Ni NPs were fabricated using Al2O3as supporting surface; that is, Ni NPs get adsorbed on Al2O3through in situ reduction reaction. Oxidative degradation of methylene blue indicated that catalytic activity of supported Ni/Al2O3is about five times higher than simple Ni as catalyst.

Bis(μ-carboxylato)dienerhodium(I) Complexes - Synthesis, Characterization and Catalytic Activity

2008 ◽  
Vol 73 (8-9) ◽  
pp. 1205-1221 ◽  
Author(s):  
Jiří Zedník ◽  
Jan Sedláček ◽  
Jan Svoboda ◽  
Jiří Vohlídal ◽  
Dmitrij Bondarev ◽  
...  
Keyword(s):  
Catalytic Activity ◽  
Diffraction Analysis ◽  
Spectroscopic Methods ◽  
X Ray Diffraction ◽  
X Ray

Dinuclear rhodium(I) η2:η2-cycloocta-1,5-diene (series a) and η2:η2-norborna-2,5-diene (series b) complexes with μ-RCOO- ligands, where R is linear C21H43 (complexes 1a, 1b), CH2CMe3 (2a, 2b), 1-adamantyl (3a, 3b) and benzyl (4a, 4b), have been prepared and characterized by spectroscopic methods. Structures of complexes 2b, 3a and 4a were determined by X-ray diffraction analysis. Complexes prepared show low to moderate catalytic activity in polymerization of phenylacetylene in THF giving high-cis-transoid polymers, but they show only oligomerization activity in dichloromethane.

scholarly journals Photocatalytic-Fenton Process under Simulated Solar Radiation Promoted by a Suitable Catalyst Selection

Catalysts ◽  
2021 ◽  
Vol 11 (8) ◽  
pp. 885
Author(s):  
Aida M. Díez ◽  
Helen E. Valencia ◽  
Maria Meledina ◽  
Joachim Mayer ◽  
Yury V. Kolen'ko
Keyword(s):  
Methylene Blue ◽  
Solar Radiation ◽  
Water Scarcity ◽  
Published Data ◽  
Fenton Process ◽  
Optimal Conditions ◽  
Operational Conditions ◽  
The Future ◽  
Simulated Solar Radiation ◽  
Catalyst Selection

Considering water scarcity, photo-based processes have been presented as a depollution technique, which should be optimized in order to be applied in the future. For that, the addition of an active photocatalyst and the usage of solar radiation are mandatory steps. Thus, Fe3O4–SiO2–TiO2 was synthesized, and its performance was evaluated using simulated solar radiation and methylene blue as a model pollutant. Under optimal conditions, 86% degradation was attained in 1 h. These results were compared to recent published data, and the better performance can be attributed to both the operational conditions selection and the higher photocatalyst activity. Indeed, Fe3O4–SiO2–TiO2 was physico-chemically characterized with techniques such as XRD, N2 isotherms, spectrophotometry, FTIR, electrochemical assays and TEM.

Sign in / Sign up

Export Citation Format

Share Document