Elaboration and characterization of photobiocomposite beads, based on titanium (IV) oxide and sodium alginate biopolymer, for basic blue 41 adsorption/photocatalytic degradation

Nouri, Loubna; Hemidouche, Sabra; Boudjemaa, Amel; Kaouah, Farida; Sadaoui, Zahra; Bachari, Khaldoun

doi:10.1016/j.ijbiomac.2020.02.159

Cited by 50 publications

(19 citation statements)

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“…The pH is chosen according to the contaminant, and it can range between acidic and basic values. Some compounds can be degraded effectively in acidic environment, near to neutral pH, or in basic pH [16][17][18]. The effect of temperature can also be a significant factor in the removal efficiency of pollutants.…”

Section: Biodegradable Polymers Combined With Tio 2 For Enhanced Photocatalytic Activitymentioning

confidence: 99%

“…Alginate is utilized in its salt form, mainly with cium and sodium (depicted at Figure 5) and has been widely explored as a biodegrad polymer to fabricate photocatalytic materials with TiO2 immobilized nanoparticle brief description of the studies reported herein for alginate-supported photocatalys presented in Table 3. Nouri et al [16] capitalized upon the manufacture of eco-friendly photo-biocomposite beads, utilizing calcium alginate and employing a green extrusion method. The prepared hydrogel composites were stored overnight in a CaCl 2 solution for the toughening of the beads and the day after the final gel beads were washed to remove the unattached Ca 2+ and further dried.…”

Section: Alginate (Alg) Synthetic and Characterization Routesmentioning

confidence: 99%

“…The irradiation was carried out under two main sources, UV light or sunlight for a time range between 45-340 min. Photocatalytic materials based on alginate showed a high recyclability with a range of 3-7 cycles [16,[33][34][35][36][37][38]. Furthermore, for the better understanding of the exporting photocatalytic results and merits of alginate matrix, selected studies are presented below.…”

Section: Photocatalytic Performancementioning

confidence: 99%

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Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation

et al. 2021

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During the past two decades, immobilization of titanium dioxide (TiO2), a well-known photocatalyst, on several polymeric substrates has extensively gained ground since it limits the need of post-treatment separation stages. Taking into account the numerous substrates tested for supporting TiO2 photocatalysts, the use of biodegradable polymer seems a hopeful option owing to its considerable merits, including the flexible nature, low price, chemical inertness, mechanical stability and wide feasibility. The present review places its emphasis on recently published research articles (2011–2021) and exhibits the most innovative studies facilitating the eco-friendly biodegradable polymers to fabricate polymer-based photocatalysts, while the preparation details, photocatalytic performance and reuse of the TiO2/polymer photocatalysts is also debated. The biodegradable polymers examined herein comprise of chitosan (CS), cellulose, alginate, starch, poly(lactid acid) (PLA), polycaprolactone (PCL) and poly(lactide-co-glycolide) (PLGA), while an emphasis on the synthetical pathway (dip-coating, electrospinning, etc.) of the photocatalysts is provided.

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Section: Biodegradable Polymers Combined With Tio 2 For Enhanced Photocatalytic Activitymentioning

confidence: 99%

Section: Alginate (Alg) Synthetic and Characterization Routesmentioning

confidence: 99%

Section: Photocatalytic Performancementioning

confidence: 99%

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Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation

et al. 2021

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“…The preferential use of nanostructured photocatalysts in AOPs for the degradation of various organic and inorganic water pollutants can be attributed to their environmentally benign properties, including high thermal stability, biological and chemical inertness, and low cost and toxicity [ 5 , 8 , 9 , 10 , 11 , 12 , 13 ], mineralizing to water, CO 2 , and minerals. On the other hand, the application of photocatalysts in powder form has been related to technical and practical problems, including the time- and energy-consuming separation/recovery of the photocatalyst from the treated solution [ 4 , 14 , 15 , 16 , 17 ], the mass transfer limitations, and the insufficient irradiation of the photocatalysts in the slurry [ 18 , 19 , 20 , 21 , 22 ] emanating from shielding effects of the suspended solid leading to significantly increasing the operational and capital costs due to the use of high power UV irradiation sources and stirring equipment, as well as the design of more complex processes for the effective separation for the photocatalyst’s retrieval downstream.…”

Section: Introductionmentioning

confidence: 99%

Engineering Commercial TiO2 Powder into Tailored Beads for Efficient Water Purification

et al. 2022

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In this study, efficient commercial photocatalyst (Degussa P25) nanoparticles were effectively dispersed and stabilized in alginate, a metal binding biopolymer. Taking advantage of alginate’s superior metal chelating properties, copper nanoparticle-decorated photocatalysts were developed after a pyrolytic or calcination-sintering procedure, yielding ceramic beads with enhanced photocatalytic and mechanical properties, excellent resistance to attrition, and optimized handling compared to powdered photocatalysts. The morphological and structural characteristics were studied using LN2 porosimetry, SEM, and XRD. The abatement of an organic pollutant (Methyl Orange, MO) was explored in the dark and under UV irradiation via batch experiments. The final properties of the photocatalytic beads were defined by both the synthesis procedure and the heat treatment conditions, allowing for their further optimization. It was found that the pyrolytic carbon residuals enabled the adhesion of the TiO2 nanoparticles, acting as binder, and increased the MO adsorption capacity, leading to increased local concentration in the photocatalyst vicinity. Well dispersed Cu nanoparticles were also found to enhance photocatalytic activity. The prepared photocatalysts exhibited increased MO adsorption capacity (up to 3.0 mg/g) and also high photocatalytic efficiency of about 50% MO removal from water solutions, reaching an overall MO rejection of about 80%, at short contact times (3 h). Finally, the prepared photocatalysts kept their efficiency for at least four successive photocatalytic cycles.

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“…The dyes generally have a synthetic origin and complex aromatic molecular structures that make them more stable and more difficult to biodegrade. Many organic dyes are harmful to humans and toxic to microorganisms, the elimination of dyes from sewage has received considerable attention in recent decades [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

Study of Methylene Blue Adsorption by Modified Kaolinite by Dimethyl Sulfoxide

Lellou

Kadi

Guemou

et al. 2020

Ecological Chemistry and Engineering S

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Tamazert kaolin was modified with dimethyl sulfoxide (DMSO). The starting material and resulting from the intercalation were characterized by X-ray diffraction, Fourier transform infrared spectroscopy and scanning electron microscopy (SEM). Intercalation caused considerable changes in our clay by increasing the basal spacing to 11.22 Å, an intercalation rate of 98 %. The adsorption of methylene blue was studied as a function of pH, contact time, temperature, dye concentrations and adsorbents. Kinetic data have been adequately described by the pseudo-second order and intraparticle scattering model. The adsorption isotherm is in good agreement with the Redlich-Peterson model. A change in thermodynamic values (ΔH°, ΔS° and ΔG°) was observed after intercalation. Adsorption became non-spontaneous exothermic and ordered.

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Elaboration and characterization of photobiocomposite beads, based on titanium (IV) oxide and sodium alginate biopolymer, for basic blue 41 adsorption/photocatalytic degradation

Cited by 50 publications

References 50 publications

Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation

Insights into Biodegradable Polymer-Supported Titanium Dioxide Photocatalysts for Environmental Remediation

Engineering Commercial TiO2 Powder into Tailored Beads for Efficient Water Purification

Study of Methylene Blue Adsorption by Modified Kaolinite by Dimethyl Sulfoxide

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