Study of methyl orange adsorption properties on ZnO–Al<sub>2</sub>O<sub>3</sub>nanocomposite adsorbent particles

Tajizadegan, Hamid; Torabi, Omid; Heidary, Azam; Golabgir, Mohammad Hosein; Jamshidi, Amin

doi:10.1080/19443994.2015.1049558

Cited by 32 publications

(8 citation statements)

References 24 publications

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“…Thus, these considerations show that the degradation of MB and MO is a chemical process, owing to the considerable role of chemical bonding and electron transfer. Additionally, the rate-limiting step could be a chemical reaction, and intra-particle diffusion could be involved in the process (Tajizadegan et al 2015 ; Zhai et al 2018 ). Furthermore, all samples showed excellent photocatalytic activity for the degradation of MO and MB, reaching approximately 95.4 and 92.7, respectively, for 0.5 Ce-Ti/Cf within 300 min under sunlight.…”

Section: Resultsmentioning

confidence: 99%

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Kotp

2022

Environ Sci Pollut Res

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In this study, cellulose fibers (Cf), extracted from sunflower seed husk, and different molar ratios of cerium titanate (Ce-Ti) NPs were prepared from sunflower seed husk extract by a green biosynthesis approach. Cf and Ce-Ti NPs were reacted via cross-linking reaction to synthesize a novel nanocomposite photocatalyst of Ce-Ti/Cf. Using Fourier-transform infrared (FTIR), X-ray diffraction (XRD), and scanning electron microscopy (SEM-EDX) spectroscopy, all manufactured materials were characterized. The results obtained from FTIR and EDX analyses indicated that Cf and its nanocomposites (0.1 Ce-Ti/Cf, 0.3 Ce-Ti/Cf, and 0.5 Ce-Ti/Cf) were successfully prepared by harnessing biomass extract from sunflower seed husk. Furthermore, XRD revealed that the degree of crystallinity of the nanocomposites was enhanced by increasing the molar ratios of the Ce-Ti NPs. The photocatalytic activity of as-fabricated 0.1 Ce-Ti/Cf, 0.3 Ce-Ti/Cf, and 0.5 Ce-Ti/Cf nanocomposite samples was investigated on methylene blue (MB) and methyl orange (MO) dyes as model organic compounds found in wastewaters. The effects of dose, contact time, and pH on the photocatalytic activity of the synthesized nanocomposites, the photodegradation kinetic parameters of MB, and MO degradation with/without the addition of H2O2 were also studied. The results revealed that high photodegradation efficiency could be obtained as the ratio of TiO2 in the Ce-Ti nanocomposite formula increases. Moreover, after sunlight irradiation, the adsorption capacity and the dye decomposition ratio significantly increase during the early contact time and reach equilibrium at about 240 and 120 min for 0.5 Ce-Ti/Cf nanocomposite photocatalyst in the absence and presence of hydrogen peroxide, respectively. In light of the obtained results and the practical wastewater treatment study conducted, the prepared photocatalyst from Ce-Ti/Cf nanocomposites could be a promising material for treating dye wastewater especially collected from Egypt.

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Section: Resultsmentioning

confidence: 99%

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Kotp

2022

Environ Sci Pollut Res

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“…Thus, these considerations show that the degradation of MB and MO is a chemical process, owing to the considerable role of chemical bonding and electron transfer. Additionally, the rate-limiting step could be a chemical reaction, and intra-particle diffusion could be involved in the process (Tajizadegan et al 2015;Zhai et al 2018).Furthermore, all samples showed excellent photocatalytic activity for the degradation of MO and MB, reaching approximately 95.4 and 92.7, respectively, for 0.5 Ce-Ti/Cf within 300 min under sunlight. Meanwhile, the photodegradation rates for 0.1 Ce-Ti/Cf (91.12%, 90.39%) and 0.3 Ce-Ti/Cf (92%, 91%) for MO and MB, respectively.…”

Section: Effect Of Degradation Timementioning

confidence: 96%

Fabrication of Cerium Titanate Cellulose Fiber Nanocomposite Materials for the Removal of Methyl Orange and Methylene Blue from Polluted Water by Photocatalytic Degradation

Kotp

2022

Preprint

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Green synthesis is anenvironmentally responsible, simple, and emerging approach to nanoparticle synthesis (NPs) and currently attracts researchersworldwide. In this study, a novel (cerium titanate (Ce-Ti) and cellulose fiber (Cf) nanocomposite photocatalyst) was successfully fabricated using a crosslinking reaction between cellulose fiber (Cf) and a different molar ratio of cerium titanate (Ce-Ti) nanoparticles. The Cf and Ce-Ti NPs were prepared from sunflower seed husk and its extract, respectively, through a green biosynthesis approach.Using Fourier Transform Infra-Red (FT-IR) spectroscopy, X-Ray Diffraction (XRD), and Scanning Electron Microscopy (SEM-EDX), all fabricated nanocomposites were characterized. Results obtained from the FT-IR and EDX analyses indicated that Cf, and its composites (0.1 Ce-Ti/Cf, 0.3 Ce-Ti/Cf, and 0.5 Ce-Ti/Cf) were prepared successfully using harnessing the biomass filtrate of sunflower seed husk.Furthermore, XRD revealed that/ the degree of crystallinity of the nanocomposites increased with the increasing molar ratios of the Ce-Ti NPs. Additionally,the photocatalytic activity of 0.1 Ce-Ti/Cf, 0.3 Ce-Ti/Cf, and 0.5 Ce-Ti/Cf nanocomposite samples in the presence and absence of hydrogen peroxide were accomplished for methylene blue (MB) and methyl orange(MO) dyes. In addition, high photodegradation efficiency was obtained by increasing the ratio of TiO2 in Ce-Ti in the nanocomposite formula; the % degradation of methylene blue dye (MB) and methyl orange (MO) using 0.5 Ce-Ti/Cf nanocomposite photocatalyst in the absence of hydrogen peroxide was 95.4 and 92.7% after 300 min, respectively. Nevertheless, with hydrogen peroxide, the % degradation was 98.9% and 94% after 120 min, respectively, after sunlight irradiation. Therefore, 0.1 Ce-Ti/Cf, 0.3 Ce-Ti/Cf, and 0.5 Ce-Ti/Cf nanocomposite photocatalyst can be viewed as a promising material for dye wastewater treatment because of its good photocatalytic activity. Moreover, the fabricated nanocomposite photocatalyst acts as a promising applicant in treating wastewater collected from Egypt.

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“…The k a of MO being adsorbed onto ZnO in this work is assumed to be inversely proportional to the initial MO concentration C 0 , based on the fact that the k a of MO being adsorbed onto Al 2 O 3 supported ZnO versus 1/C 0 was roughly linear with the correlation constant being 0.994 in conditions of C 0 <150ppm [32]. This agrees with that a higher MO concentration causes a higher mass transfer resistance [32]. Then k a is roughly calculated by k a =a/C 0 , where a is a constant.…”

Section: Photocatalytic Performances Of the Zno Samples In Microchamber Reactorsmentioning

confidence: 99%

“…h), the flow rate, the MO concentration, and catalyst properties. In addition, the overall reaction order is the order of adsorption, which is one [32]. Therefore, the definition of the experimental reaction constant K (-(lnC/C 0 )/t) is reasonable.…”

Section: Photocatalytic Performances Of the Zno Samples In Microchamber Reactorsmentioning

confidence: 99%

Photocatalytic performances of ZnO nanoparticle film and vertically aligned nanorods in chamber-based microfluidic reactors: Reaction kinetics and flow effects

Zhao

Ning

Wen

et al. 2017

Applied Catalysis B: Environmental

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The nanoparticle seed layer (a film) and vertically aligned nanorods of zinc oxide (ZnO) with different lengths were fabricated within a novel chamber-based microfluidic (microchamber) reactor with a varying height of 0.127-5mm and characterized with their microstructures, photocatalytic performances as well as qualitative reaction kinetics. The ZnO seed layer was produced by a sol-gel procedure and the nanorods were hydrothermally grown on seed layer coated glass substrates. These ZnO samples were integrated into the microchamber reactor through a seven-layer sandwiched configuration. The aqueous methyl orange (MO) solution was chosen as a model polluted water. By comparing the ultraviolet-visible (UV-Visible) absorbance of the original MO solution and the post-treatment sample, the reaction constants were calculated, representing the efficiencies of the reactors. The ZnO samples, usually possessing a large amount of defects, with a higher crystal quality showed an enhanced activity. The reaction constant was featured of a plateau with accelerating flow rates, exhibited an exponentially decreasing function of the chamber height, and declined with increasing the initial concentration of the MO solution. The efficiency of the microchamber reactor was found to be one to two orders of magnitude higher than that of a batch reactor. The rate determining step was suggested to be the mass transport related adsorption of MO on ZnO. The measured reaction properties and the reactor design should be of considerable significance to the scaling-up and optimization of microchamber catalytic reactors dedicated to water purification and other applications.

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Study of methyl orange adsorption properties on ZnO–Al₂O₃nanocomposite adsorbent particles

Cited by 32 publications

References 24 publications

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Fabrication of Cerium Titanate Cellulose Fiber Nanocomposite Materials for the Removal of Methyl Orange and Methylene Blue from Polluted Water by Photocatalytic Degradation

Photocatalytic performances of ZnO nanoparticle film and vertically aligned nanorods in chamber-based microfluidic reactors: Reaction kinetics and flow effects

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Study of methyl orange adsorption properties on ZnO–Al2O3nanocomposite adsorbent particles

Cited by 32 publications

References 24 publications

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Fabrication of cerium titanate cellulose fiber nanocomposite materials for the removal of methyl orange and methylene blue from polluted water by photocatalytic degradation

Fabrication of Cerium Titanate Cellulose Fiber Nanocomposite Materials for the Removal of Methyl Orange and Methylene Blue from Polluted Water by Photocatalytic Degradation

Photocatalytic performances of ZnO nanoparticle film and vertically aligned nanorods in chamber-based microfluidic reactors: Reaction kinetics and flow effects

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Study of methyl orange adsorption properties on ZnO–Al₂O₃nanocomposite adsorbent particles