Photocatalytic degradation of reactive black 5 using Photo-Fenton and ZnO nanoparticles under UV irradiation

Comparative photocatalytic degradation of polythene films was investigated with undoped and metal (Fe, Ag, and Fe/Ag mix) doped TiO2nanoparticles under three different conditions such as UV radiation, artificial light, and darkness. Prepared photocatalysts were characterized by XRD, SEM, and EDS techniques. Photocatalytic degradation of the polythene films was determined by monitoring their weight reduction, SEM analysis, and FTIR spectroscopy. Weight of PE films steadily decreased and led to maximum of 14.34% reduction under UV irradiation with Fe/Ag mix doped TiO2nanoparticles and maximum of 14.28% reduction under artificial light with Ag doped TiO2nanoparticles in 300 hrs. No weight reduction was observed under darkness. Results reveal that polythene-TiO2compositing with metal doping has the potential to degrade the polythene waste under irradiation without any pollution.

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Ecofriendly and low-cost synthesis of ZnO nanoparticles from Acremonium potronii for the photocatalytic degradation of azo dyes

Environmental Research ◽

10.1016/j.envres.2021.111700 ◽

2021 ◽

pp. 111700

Author(s):

Fuad Ameen ◽

Turki Dawoud ◽

Saleh AlNadhari

Keyword(s):

Photocatalytic Degradation ◽

Azo Dyes ◽

Zno Nanoparticles ◽

Low Cost

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Photocatalytic Degradation of Synthetic Sulfur Pollutants in Petroleum Fractions under Different pH and Photocatalyst

Emerging Advances in Integrated Technology ◽

10.30880/emait.2021.02.01.004 ◽

2021 ◽

Vol 02 (01) ◽

Author(s):

Mohamad Alif Hakimi Hamdan ◽

◽

Nur Hanis Hayati Hairom ◽

Nurhafisza Zaiton ◽

Zawati Harun ◽

...

Keyword(s):

Photocatalytic Degradation ◽

Zno Nanoparticles ◽

Low Cost ◽

Industrial Effluents ◽

Degradation Process ◽

Vital Role ◽

Petroleum Fraction ◽

Precipitation Method ◽

Synthesis Process ◽

Petroleum Fractions

Thiophene is one of the sulfur compounds in the petroleum fraction that can be harmful to living things and lead to a critical effect on the ecosystem. Photocatalytic degradation is one of the promising methods in treating wastewater as it can mineralization of pollutants into carbon dioxide and water. Other than that, this method is non-toxic and relatively low cost. The production of hydroxyl radicals playing a vital role in the degradation of organic pollutants. It has been claimed that the usage of zinc oxide (ZnO) nanoparticles could give an excellent degradation process as this photocatalyst have high photosensitivity, low cost and chemically stable. However, the preparation method of ZnO nanoparticles will affect the agglomeration, particle size, shape and morphology of particles and lead to influence the photocatalytic activity in degrading thiophene. Therefore, this study focused on the effectiveness of ZnO nanoparticles in the presence of fibrous nanosilica (KCC-1) and polyethylene glycol (PEG) as the capping agent to degrade synthetic thiophene. ZnO/KCC-1 had been synthesized via the precipitation method and characterized by using Fourier Transform Infrared (FTIR). The chemical bond and nature of the photocatalyst from the FTIR results proved that the synthesis process to produce the ZnO/KCC-1 was succeed. The large surface area of KCC-1 increases the effectiveness of ZnO which is supported by the experimental data. Accordingly, the optimum condition for photocatalytic degradation of thiophene is under pH 7 by using ZnO/KCC-1 as photocatalyst. Hence, it is believed that this research could be implemented to remove the thiophene in petroleum fraction from the actual industrial effluents and this can preserve nature in the future.

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Photocatalytic Degradation of Humic Acid Using Ti/Anodized TiO2 Metal Plate with Fe-Doping

Materials Science Forum ◽

10.4028/www.scientific.net/msf.724.33 ◽

2012 ◽

Vol 724 ◽

pp. 33-36 ◽

Cited By ~ 1

Author(s):

Jong Oh Kim ◽

Seung Pil Choi ◽

Geon Tae Kim ◽

Yong Hak Kim

Keyword(s):

Humic Acid ◽

Photocatalytic Degradation ◽

Surface Area ◽

Acid Concentration ◽

Uv Irradiation ◽

Metal Plate ◽

Fe Doping ◽

Treatment Efficiency ◽

Acid Degradation ◽

Hypochromic Effect

We evaluated the treatment efficiency of humic acid using Ti and anodized TiO2metal plate with/without Fe-doping. Variation of humic acid concentration after 60 minutes of UV irradiation in the case of Ti only, Fe-Ti, TiO2only and Fe-TiO2was about 3.0%, 5.5%, 9.8% and 9.2%, respectively. . It is found that hypochromic effect was revealed in all cases with respect to doping time. Fe doping method is considered to be effective for humic acid degradation in spite of relatively low surface area of Ti and anodized TiO2metal plate.

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