Photocatalytic degradation of bisphenol A in the presence of Ce–ZnO: Evolution of kinetics, toxicity and photodegradation mechanism

Bechambi, Olfa; Jlaiel, Lobna; Najjar, Wahiba; Sayadi, Sami

doi:10.1016/j.matchemphys.2016.01.044

Cited by 122 publications

(42 citation statements)

References 57 publications

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“…The formation of hydroxyl radicals (OH-) during the catalytic process over ZnONPs is shown in Equations (2) and (3) [21]. However, it is known that ZnONPs has a high recombination rate of photo-induced hole-electron pairs produced in reaction 2, and thus reaction 3 will not be achieved and this hinders ZnONPs catalytic activity [27,28].…”

Section: Catalysis Activity Of the Prepared Samplesmentioning

confidence: 99%

“…This is mainly because it has high efficiency, low cost, thermal and chemical stability, non-toxicity, and environmental-friendly nature [12,22,26]. On the other hand, it has several drawbacks such as low quantum yield, the high recombination rate of photo-induced hole-electron pairs, and instability [20,27], which hinder its commercial applications [10,21,28,29]. To overcome these drawbacks of ZnO, many different approaches have been developed such as metal doping of ZnO [30][31][32][33][34], organic modification of the surface, and semiconductor coupling [35].…”

Section: Introductionmentioning

confidence: 99%

“…Recently, many efforts have been spent on doping ZnO with noble metals to produce nanocomposite structures. Cerium has been used as dopant in ZnO to increase its photocatalytic activity because it acts as an electron reservoir [27]. The most applied metal/ZnO nanocomposite is Ag/ZnO [11,19,26,30,31,35,36], due to the Ag nanoparticles antibacterial [37], and catalytic activity since it has a high surface area [9,24].…”

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of an Activated Carbon-Supported Ag and ZnO Nanocomposite for Photocatalytic Degradation and Its Antibacterial Activities

2020

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In this study Ag nanoparticles (AgNPs), ZnO nanoparticles (ZnONPs), and Ag/ZnO nanocomposites were greenly synthesized and loaded on activated carbon via three different routes: simple impregnation, successive precipitation, and co-precipitation. Neem leaf extract was used as a reducing and stabilizing agent. The morphological and structural properties of the synthesized nanocomposites have been examined using different analytical techniques such as XRD, SEM, FTIR, and UV. The antibacterial and catalytic activity of the synthesized nanocomposites were examined and compared. The results showed that AgNPs loaded on activated carbon (Ag/AC) has the best catalytic activity compared to the other nanocomposites, which is attributed to the good dispersal of AgNPs on the surface of activated carbon. Furthermore, AgNPs showed the best antibacterial effect on eight out of 16 tested pathogens. Results also showed that the order of precipitation is an important factor, as both antibacterial activities and photodegradation activities were higher for ZnO/Ag/AC than Ag/ZnO/AC. Furthermore, the co-precipitation method was shown to be better than the successive precipitation method for 4-nitrophenol photodegradation and 14 out of the 16 antibacterial tests performed.

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Section: Catalysis Activity Of the Prepared Samplesmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Green Synthesis of an Activated Carbon-Supported Ag and ZnO Nanocomposite for Photocatalytic Degradation and Its Antibacterial Activities

2020

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“…The UV-A radiation (λ = 365 nm) with TiO 2 P25 result in complete removal after 180 min in first-order kinetics with Kap = 20.3 10 −3 min −1 , with 5 mgL −1 as initial concentration and 200 mg L −1 as the addition of the TiO2 P25 [3]. The complete mineralization of BPA was at pH 3 after 120 min; intermediates formed at higher pH values are most stable and therefore difficult to be decomposed and mineralized [13,14]. The TiO 2 sources as anatase, rutile, brookite, and their mixtures indicate the lower uptakes with less than 6% were over the raw TiO 2 .…”

Section: Single − Aromatic Intermediates + ˙Oh → Aromatic Ring Openedmentioning

confidence: 99%

Green Water Treatment for Pharmaceutical Pollution

Ortiz¹

2019

Green Chemistry [Working Title]

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Environmental sustainability demands the advancement in water treatment and the use of lighting natural resources. Brazil has one of the most stable and intense solar irradiation in the world. It has to be used not only for energy generation purposes but also and mostly for water treatment, water quality polishment, and furthermore water disinfection. The chapter performs a comparison of different green technologies for water treatment as natural solar irradiation, simulated solar photolysis, solar photo-Fenton with and without hydrogen peroxide addition (solar/ Fe), solar photo-Fenton with and without peroxide (solar/Fe/H 2 O 2), titanium oxide-mediated photocatalysis (UV/TiO 2), photolysis under UV irradiation, and UV treatment with hydrogen peroxide (UV/H 2 O 2). The chapter describes the solar photodecomposition calculations for pharmaceuticals and the emerging pollutants mostly found in polluted waters, including the decomposition route, kinetics, and process parameters. Many published works to point out the important properties to evaluate catalyzer and semiconductor materials after their use in photodecomposition processes. The essay includes the solar photodecomposition of dyes, carbamazepine, hormones, acetaminophen, antipyrine, bisphenol A, antibiotics, and the photodecomposition by-products. Finally, the chapter presents the synergistic effect between them with the probable mechanism and mineralization degree.

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“…The photocatalytic activity of Zn doped CuO nanofiber was evaluated by calculating the rate of photodegradation of methylene blue dye. The light induced photodegradation of methylene blue dye follows first order kinetic model obeying Langmuir-Hinshelwood model [47,48]. For better understanding of the photocatalytic reaction, kinetics of methylene blue dye degradation experiments were conducted.…”

Section: Photocatalytic Kineticsmentioning

confidence: 99%

Fabrication and characterization of Zn doped CuO nanofiber using newly designed nanofiber generator for the photodegradation of methylene blue from textile effluent

Sethuraman¹,

Venkatachalam²,

Kirupha³

2018

Materials Science-Poland

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High aspect ratio, Zn doped copper oxide (Zn-CuO) nanofibers have been fabricated employing a newly designed electrospun coating unit using copper acetate, sodium hydroxide and polyethylene glycol in aqueous state. The prepared Zn doped copper oxide (Zn-CuO) nanofibers were sintered at 400 °C, 500 °C and 600 °C separately and characterized using X-ray diffraction XRD, Fourier transformation infrared spectroscopy FT-IR, scanning electron microscopy SEM, energy dispersive spectroscopy EDS. The average crystallite size was in the range of 28 nm to 30 nm. Optical properties of Zn-CuO nanofibers were analyzed using UV-DRS studies which showed a blue shift in the absorption band. An increase in band gap with the increase in postannealing temperature was observed due to the blue shift in absorption edge of CuO causing enhanced photodegradation. The catalytic properties of the CuO nanofibers were tested using methylene blue in aqueous medium. The influences of parameters responsible for high photodegradation were optimized and the rate of the photodegradation process was calculated using photodegradation kinetics. The reusability test was conducted to find the stability of the fabricated Zn-CuO nanofibers.

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Photocatalytic degradation of bisphenol A in the presence of Ce–ZnO: Evolution of kinetics, toxicity and photodegradation mechanism

Cited by 122 publications

References 57 publications

Green Synthesis of an Activated Carbon-Supported Ag and ZnO Nanocomposite for Photocatalytic Degradation and Its Antibacterial Activities

Green Synthesis of an Activated Carbon-Supported Ag and ZnO Nanocomposite for Photocatalytic Degradation and Its Antibacterial Activities

Green Water Treatment for Pharmaceutical Pollution

Fabrication and characterization of Zn doped CuO nanofiber using newly designed nanofiber generator for the photodegradation of methylene blue from textile effluent

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