ZnO/spiral-shaped glass for solar photocatalytic oxidation of Reactive Red 120

Ghaly, Montaser Y.; Ali, Md. Eaqub; Österlund, Lars; Khattab, I.A.; Badawy, Mohamed I.; Farah, Joseph Y.; Zaher, Fatama M.; Al-Maghrabi, Mohammednoor N.

doi:10.1016/j.arabjc.2014.02.015

Cited by 21 publications

(7 citation statements)

References 21 publications

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“…In the current, the blending ratios of caustic soda and zircon (4:1, and 2:1; soda : zircon) are used and heated at temperature 500 and 600 o C for 3 h (alkali fusion). After that, zircon converted to Na 2 ZrO 4 associated with Na 2 SiO 4 and other impurities as shown in equation (4). Then, the fused materials at different temperature are washed with water to dissolve Na 2 SiO 4 and other impurities and finally, ziconyl hydroxide formed as shown in equation 5.…”

Section: Production Of Zro 2 Materialsmentioning

confidence: 99%

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Production of zirconia materials from zircon for dye removal from wastewater

et al. 2020

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Z irconia (ZrO2) is a noteworthy metal oxide because of its characteristics. It can be implemented in different applications; adsorption of pollutant, and photocatalytic oxidation. The main focus of this research was to synthesize ZrO2 from low cost and locally available materials; zircon. As well the preparation of ZrO2 was conducted at different temperature procedures. Characterization of prepared materials was performed using X-ray diffraction (XRD), Fourier transform infrared spectra (FTIR) and scanning electron microscope (SEM) which confirmed the production of homogeneous spherical crystalline ZrO2 compared with commercial ZrO2. Moreover, ZrO2-500 was examined for removal of dye using adsorption and photocatalytic activities. The removal adsorptive capacity of ZrO2-500 for red dye 195 was decreased from 37.1 to 2.2 mg/g with increasing dose up to 3 g/L. Meanwhile, red dye was removed with rate constant of 0.132-0.324 h-1 under solar simulator. Finally, zirconia was successively prepared from low cost materials with lower energy and materials consumption.

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Section: Production Of Zro 2 Materialsmentioning

confidence: 99%

“…Annually, about forty percent of used dyes could be discharged to wastewater stream. The protection of water resources from dying effluents has become a serious need [4]. Advanced oxidation technologies (AOTs) have recently been employed to be effective for mineralization of toxic pollutants in wastewater.…”

Section: Introductionmentioning

confidence: 99%

Production of zirconia materials from zircon for dye removal from wastewater

et al. 2020

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“…due to flexible nanofibrous structure with tunable diameters, which are easy to control and environmentally compatible [34]. Their applications in photocatalytic are expected in high photocatalytic property, attributed to its advantages of higher surface area/volume ratio [35], compared by incorporating the photocatalyst nanoparticles into the membrane. In addition, the photocatalytic membrane ensures the photocatalyst recyclability, as their fibrous structure facilitates the difficulty of powder photocatalysts' separation from reaction mixture as previously mentioned.…”

Section: Introductionmentioning

confidence: 99%

Electrospun Nanofibers Embedding ZnO/Ag2CO3/Ag2O Heterojunction Photocatalyst with Enhanced Photocatalytic Activity

et al. 2019

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The immobilization of photocatalyst onto substrate has a great potential for energy-intensive separation to avoid the costly separation process and unwanted release of photocatalyst into the treated water. In this study, electrospun nanofiber composed of polyvinylidene fluoride (PVDF) with the immobilized ZnO, ZnO/Ag2CO3, ZnO/Ag2CO3/Ag2O, and ZnO/Ag2O photocatalysts were prepared via the electrospinning process. The immobilized ZnO and heterojunctioned ZnO in the PVDF electrospun nanofiber were proven via X-ray diffraction (XRD) and Fourier transform infrared spectroscopy (FTIR). The electrospinning allowed high chemical binding of the nanofiber composite with good physical interaction between the photocatalyst and the electrospun nanofiber. AFM images obtained for the nanofibers were found to be rougher than that of the pristine PVDF electrospun nanofiber. Among the photocatalyst embedded, the immobilized ZnO/Ag2CO3/Ag2O had endowed the nanofiber with an excellent photocatalytic activity and recyclability for the degradation of the RR120 under UV light irradiation. Based on the results, effective immobilization of ZnO/Ag2CO3/Ag2O in PVDF nanofiber with 99.62% photodegradation in 300 min compared to PVDF-ZnO, PVDF-ZnO/Ag2CO3, and PVDF-ZnO/Ag2O of 28.14%, 90.49%, and 96.34%, respectively. The effective ZnO/Ag2CO3/Ag2O immobilization into polymers with affinity toward organic dye pollutants could both increase the efficiency and reduce the energy requirements for water treatment via the photocatalytic application.

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“…Adsorption, ultrafiltration, reverse osmosis, coagulation, sedimentation, and ozone treatment are assumed as traditional treatment methods which have disadvantages such as high costs, production of toxic sludge, ineffective degradation and low mineralization of organic dyes, nondestructive decolorization, producing secondary pollution and high treatment time [2,5,7,[12][13][14][15][16]. New development in water treatment has led to the technology of Advanced Oxidation Processes (AOPs) which are widely used for mineralizing toxic pollutants and a variety of recalcitrant organics in wastewaters [2,3,7,8,[16][17][18][19][20]. Given different AOPs, heterogeneous photocatalysis is regarded as an effective and promising technique [4,12,13].…”

Section: Introductionmentioning

confidence: 99%

Mg and La Co-doped ZnO Nanoparticles Prepared by Sol–gel Method: Synthesis, Characterization and Photocatalytic Activity

Khanizadeh

Khosravi

Behnajady

et al. 2019

Period. Polytech. Chem. Eng.

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In this study, La and Mg doped, and co-doped ZnO nanoparticles were prepared using the sol-gel method. The prepared samples were characterized by X-ray diffraction (XRD), field emission scanning electron microscopy (FESEM), energy dispersive X-ray spectroscopy (EDX), transmission electron microscopy (TEM), UV-Vis diffuse reflectance spectroscopy (DRS), and N2 physisorption techniques. The XRD results indicated that the prepared nanoparticles can be well adopted by the hexagonal wurtzite structure crystal and there are no second impurity peaks. Studies of the FESEM, EDX and TEM have shown that the samples have uniform spherical-like morphology with a homogenous distribution. The incorporation of La and Mg into the ZnO lattice had no effect on the morphology of the nanoparticles, but a reduction in the size of the grains (≈ 14 nm to ≈ 7 nm) was observed due to the insertion of these ions. The results of N2 physisorption indicated that there was an increase in BET surface area and pore volume for doped and co-doped samples. The results of DRS showed an increase in band gap energy and a blue shift at the absorption edge for doped and co-doped samples. The photocatalytic activity of the prepared catalysts was evaluated in the removal of RhB under UVA irradiation. The results showed that Mg5%-La5%/ZnO had the highest photoactivity (91.18 %) among all samples.

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ZnO/spiral-shaped glass for solar photocatalytic oxidation of Reactive Red 120

Cited by 21 publications

References 21 publications

Production of zirconia materials from zircon for dye removal from wastewater

Production of zirconia materials from zircon for dye removal from wastewater

Electrospun Nanofibers Embedding ZnO/Ag2CO3/Ag2O Heterojunction Photocatalyst with Enhanced Photocatalytic Activity

Mg and La Co-doped ZnO Nanoparticles Prepared by Sol–gel Method: Synthesis, Characterization and Photocatalytic Activity

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