Decomposition of Organic Dye in Water through a Heterogeneous Fenton Process Catalyzed by Fe (III)-Grafted PTFE Fiber Complex

2012 ◽  
Vol 602-604 ◽  
pp. 913-916
Author(s):  
Zhi Zhong Ding ◽  
Yong Chun Dong
Keyword(s):  
Dye Degradation ◽  
Uv Light ◽  
Light Irradiation ◽  
Fenton Process ◽  
Heterogeneous Fenton ◽  
Irradiation Intensity ◽  
Uv Light Irradiation ◽  
Fenton Catalyst ◽  
Fe Content ◽  
Visible Irradiation

Fe (III)-modified polytetrafluoroethylene (PTFE) fiber complex was prepared with poly acrylic acid grafted PTFE fiber and FeCl3 aqueous solution and used a novel heterogeneous Fenton catalyst for the photo-assisted degradation of Rhodamine B in water. The results indicated that Fe (III)-grafted PTFE) fiber complex can significantly enhance the dye degradation at a wide pH media under light irradiation. Increasing Fe content of the catalyst, H2O2 concentration and visible irradiation intensity leads to a fast degradation. Moreover, UV light irradiation is much more effective than visible light irradiation for promoting dye degradation.

Synthesis of Hybrid Cu-Doped TiO2 Photocatalyst for Dye Removal

2019 ◽  
Vol 797 ◽  
pp. 84-91 ◽  
Author(s):  
Ying Pei Lim ◽  
Ying Chin Lim
Keyword(s):  
Incubation Time ◽  
Incubation Temperature ◽  
Dye Degradation ◽  
Uv Light ◽  
Light Irradiation ◽  
Impregnation Method ◽  
Wet Impregnation ◽  
Uv Light Irradiation ◽  
Photocatalytic Activities ◽  
Wet Impregnation Method

Titanium dioxide (TiO2) photocatalyst is one of the promising semiconductors used for the degradation of commercial dyes. However, it has to be doped with other metals to increase its efficiency, reactivity and stability. This study was carried out to synthesize hybrid Cu-doped TiO2 using wet impregnation method by varying the loading of copper precursor (0.3-1.0 wt%), incubation temperature (50-90°C) and incubation time (1-24 h). The synthesized hybrid Cu-doped TiO2 was characterized using XRD, EDX, FESEM and BET to obtain the structural, elemental, and surface morphological information. The photocatalytic activities of the synthesized Cu-doped TiO2 were investigated for the degradation of methyl orange (MO) under UV-light irradiation. The results revealed that the optimum Cu loading was at 0.5wt% Cu with incubation temperature of 50°C and 2h incubation time. The hybrid Cu-doped TiO2 showed an excellent dye degradation efficiency ranging from 40-82% under UV-light irradiation.

scholarly journals The influence of the UV irradiation intensity on photocatalytic activity of ZnAl layered double hydroxides and derived mixed oxides

2012 ◽  
Vol 18 (2) ◽  
pp. 295-303 ◽  
Author(s):  
Milica Hadnadjev-Kostic ◽  
Tatjana Vulic ◽  
Dmitar Zoric ◽  
Radmila Marinkovic-Neducin
Keyword(s):  
Photocatalytic Activity ◽  
Uv Irradiation ◽  
Layered Double Hydroxides ◽  
Mixed Oxide ◽  
Mixed Oxides ◽  
Uv Light ◽  
Light Irradiation ◽  
Irradiation Intensity ◽  
Uv Light Irradiation ◽  
Double Hydroxides

Layered double hydroxides (LDHs) have been studied to a great extent as environmental-friendly complex materials that can be used as photocatalysts or photocatalyst supports. ZnAl layered double hydroxides and their derived mixed oxides were chosen for the investigation of photocatalytic performances in correlation with the UV intensities measured in the South Pannonia region. Low supersaturation coprecipitation method was used for the ZnAl LDH synthesis. For the characterization of LDH and thermal treated samples powder X-ray diffraction (XRD), scanning electron microscopy (SEM), electron dispersive spectroscopy (EDS), nitrogen adsorption-desorption were used. The decomposition of azodye, methylene blue was chosen as photocatalytic test reaction. The study showed that the ZnAl mixed oxide obtained by thermal decomposition of ZnAl LDH has stable activity in the broader UV light irradiation range characterizing the selected region. Photocatalytic activity could be mainly attributed to the ZnO phase, detected both in LDH and thermally treated samples. The study showed that the ZnAl mixed oxide obtained by the calcination of ZnAl LDH has a stable activity within the measured UV light irradiation range; whereas the parent ZnAl LDH catalyst did not perform satisfactory when low UV irradiation intensity is implied.

Recyclable Natural Magnetite Nanoparticles for Effective Degradation of Methylene Blue in Water under UV Light Irradiation

2020 ◽  
Vol 855 ◽  
pp. 315-321
Author(s):  
Nandang Mufti ◽  
Siti Maryam ◽  
Henry Setiyanto ◽  
Ahmad Taufiq ◽  
Sunaryono
Keyword(s):  
Methylene Blue ◽  
Magnetite Nanoparticles ◽  
Uv Light ◽  
Light Irradiation ◽  
Additional Advantage ◽  
Uv Light Irradiation ◽  
Fenton Catalyst ◽  
Ability To Act ◽  
Materials Used ◽  
Co Precipitation

Among the numerous materials used for dye removal, magnetite is particularly interesting due to its ability to act as an adsorbent and a Fenton catalyst, being easily separable by application of a magnetic field and reusable. Herein, we describe a co-precipitation–based synthesis of magnetite nanoparticles (particle size = 11 nm, surface area = 147.12 m2 g–1) from iron sand and investigate their effectiveness for methylene blue (MB) degradation. The above nanoparticles could promote the decomposition of MB both in the dark (via adsorption) and under UV light irradiation (via Fenton-type degradation), exhibiting the additional advantage of recyclability. Thus, MB degradation efficiencies are 76.32, 76.08, and 68.52% for first, second, and third cycles, respectively, indicating that the prepared magnetic material is a promising recyclable catalyst for the decontamination of dye-containing wastewater. The photo Fenton reactions take to account for reproducibility of MB degradation.

Mitigation of the inhibitory effects of co-existing substances on the Fenton process by UV light irradiation

2020 ◽  
Vol 55 (6) ◽  
pp. 730-738
Author(s):  
Kosuke Muramatsu ◽  
Masahiro Tokumura ◽  
Qi Wang ◽  
Yuichi Miyake ◽  
Takashi Amagai ◽  
...  
Keyword(s):  
Uv Light ◽  
Light Irradiation ◽  
Fenton Process ◽  
Inhibitory Effects ◽  
Uv Light Irradiation

scholarly journals Removal of Textile Dyes from Aqueous Solution by Heterogeneous Photo-Fenton Reaction Using Modified PAN Nanofiber Fe Complex as Catalyst

2013 ◽  
Vol 2013 ◽  
pp. 1-9 ◽  
Author(s):  
Xueting Zhao ◽  
Yongchun Dong ◽  
Bowen Cheng ◽  
Weimin Kang
Keyword(s):  
Dye Degradation ◽  
Textile Dyes ◽  
Heterogeneous Fenton ◽  
Electrospinning Technique ◽  
Anthraquinone Dye ◽  
Initial Concentration ◽  
Irradiation Intensity ◽  
Fe Content ◽  
Fe Complex ◽  
Pan Nanofiber

The modified PAN nanofiber Fe complex was prepared by the amidoximation and Fe coordination of PAN nanofiber was obtained using electrospinning technique and then used for the heterogeneous Fenton degradation of textile dyes as a novel catalyst. Some main factors affecting dye degradation such as Fe content of catalyst, irradiation intensity, H2O2initial concentration, the solution pH as well as dye structure, and initial concentration were investigated. UV-Vis spectrum analysis and TOC measurement were also used to evaluate the dye degradation process. The results indicated that the modified PAN nanofiber Fe complex exhibited a much better catalytic activity for the heterogeneous Fenton degradation of textile dyes than the Fe complex prepared with conventional PAN yarns in the dark or under light irradiation. Increasing Fe content of catalyst or irradiation intensity would accelerate the dye degradation. And the highest degradation efficiency was obtained with 3.0 mmol L−1H2O2at pH 6. Moreover, this complex was proved to be a universal and efficient catalyst for degradation of three classes of textile dyes including azo dye, anthraquinone dye, and triphenylmethane dye. Additionally, the dye mineralization was also significantly enhanced in the presence of this complex.

scholarly journals Fenton Process Coupled to Ultrasound and UV Light Irradiation for the Oxidation of a Model Pollutant

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Karen E. Barrera-Salgado ◽  
Gabriela Ramírez-Robledo ◽  
Alberto Álvarez-Gallegos ◽  
Carlos A. Pineda-Arellano ◽  
Fernando Z. Sierra-Espinosa ◽  
...  
Keyword(s):  
Dye Degradation ◽  
Uv Light ◽  
Textile Dye ◽  
Fenton Process ◽  
Treatment Efficiency ◽  
Solution Ph ◽  
Fixed Amount ◽  
Uv Light Irradiation ◽  
Supporting Material ◽  
The Stability

The Fenton process coupled to photosonolysis (UV light and Us), using Fe2O3catalyst supported on Al2O3, was used to oxidize a model pollutant like acid green 50 textile dye (AG50). Dye degradation was followed by AG50 concentration decay analyses. It was observed that parameters like iron content on a fixed amount of catalyst supporting material, catalyst annealing temperature, initial dye concentration, and the solution pH influence the overall treatment efficiency. High removal efficiencies of the model pollutant are achieved. The stability and reusability tests of the Fe2O3catalyst show that the catalyst can be used up to three cycles achieving high discoloration. Thus, this catalyst is highly efficient for the degradation of AG50 in the Fenton process.

scholarly journals TiO2-Powdered Activated Carbon (TiO2/PAC) for Removal and Photocatalytic Properties of 2-Methylisoborneol (2-MIB) in Water

Water ◽  
2021 ◽  
Vol 13 (12) ◽  
pp. 1622
Author(s):  
Xiao-Pin Guo ◽  
Peng Zang ◽  
Yong-Mei Li ◽  
Dong-Su Bi
Keyword(s):  
Activated Carbon ◽  
Natural Organic Matter ◽  
Uv Light ◽  
Sol Gel ◽  
Light Irradiation ◽  
Nano Tio2 ◽  
Uv Light Irradiation ◽  
Adsorption Capacities ◽  
Taste And Odor ◽  
Composite Photocatalysts

2-methylisoborneol (2-MIB) is a common taste and odor compound caused by off-flavor secondary metabolites, which represents one of the greatest challenges for drinking water utilities worldwide. A TiO2-coated activated carbon (TiO2/PAC) has been synthesized using the sol-gel method. A new TiO2/PAC photocatalyst has been successfully employed in photodegradation of 2-MIB under UV light irradiation. In addition, the combined results of XRD, SEM-EDX, FTIR and UV-Vis suggested that the nano-TiO2 had been successfully loaded on the surface of PAC. Experimental results of 2-MIB removal indicated that the adsorption capacities of PAC for 2-MIB were higher than that of TiO2/PAC. However, in the natural organic matter (NOM) bearing water, the removal efficiency of 2-MIB by TiO2/PAC and PAC were 97.8% and 65.4%, respectively, under UV light irradiation. Moreover, it was shown that the presence of NOMs had a distinct effect on the removal of MIB by TiO2/PAC and PAC. In addition, a simplified equivalent background compound (SEBC) model could not only be used to describe the competitive adsorption of MIB and NOM, but also represent the photocatalytic process. In comparison to other related studies, there are a few novel composite photocatalysts that could efficiently and rapidly remove MIB by the combination of adsorption and photocatalysis.

Photocatalytic performance of Cu-doped titania thin films under UV light irradiation

2021 ◽  
Vol 553 ◽  
pp. 149535
Author(s):  
Elisa Moretti ◽  
Elti Cattaruzza ◽  
Cristina Flora ◽  
Aldo Talon ◽  
Eugenio Casini ◽  
...  
Keyword(s):  
Thin Films ◽  
Photocatalytic Performance ◽  
Uv Light ◽  
Light Irradiation ◽  
Uv Light Irradiation ◽  
Doped Titania
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