Synthesis of high efficient CS/PVDC/TiO2-Au nanocomposites for photocatalytic degradation of carcinogenic ethidium bromide in sunlight

Ella, Dalal A. Abou El; Youssef, Ahmed M.; Ghannam, Hala Elshahat; Zedan, Abdallah F.; Aboulthana, Wael Mahmoud; Al-Sherbini, Al-Sayed

doi:10.21608/ejchem.2020.21987.2313

Cited by 6 publications

(3 citation statements)

References 23 publications

(26 reference statements)

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“…The titania (TiO 2 ) nanotubes (TNT) and nanowires (TNW) were prepared by the strong alkaline treatment of spherical anatase TiO 2 particles under hydrothermal conditions followed by the acidic treatment using diluted HCl solution, as reported earlier [ 19 , 23 ].…”

Section: Methodsmentioning

confidence: 99%

CO Oxidation at Near-Ambient Temperatures over TiO2-Supported Pd-Cu Catalysts: Promoting Effect of Pd-Cu Nanointerface and TiO2 Morphology

et al. 2021

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Significant improvement of the catalytic activity of palladium-based catalysts toward carbon monoxide (CO) oxidation reaction has been achieved through alloying and using different support materials. This work demonstrates the promoting effects of the nanointerface and the morphological features of the support on the CO oxidation reaction using a Pd-Cu/TiO2 catalyst. Pd-Cu catalysts supported on TiO2 were synthesized with wet chemical approaches and their catalytic activities for CO oxidation reaction were evaluated. The physicochemical properties of the prepared catalysts were studied using standard characterization tools including SEM, EDX, XRD, XPS, and Raman. The effects of the nanointerface between Pd and Cu and the morphology of the TiO2 support were investigated using three different-shaped TiO2 nanoparticles, namely spheres, nanotubes, and nanowires. The Pd catalysts that are modified through nanointerfacing with Cu and supported on TiO2 nanowires demonstrated the highest CO oxidation rates, reaching 100% CO conversion at temperature regime down to near-ambient temperatures of ~45 °C, compared to 70 °C and 150 °C in the case of pure Pd and pure Cu counterpart catalysts on the same support, respectively. The optimized Pd-Cu/TiO2 nanowires nanostructured system could serve as efficient and durable catalyst for CO oxidation at near-ambient temperature.

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Section: Methodsmentioning

confidence: 99%

CO Oxidation at Near-Ambient Temperatures over TiO2-Supported Pd-Cu Catalysts: Promoting Effect of Pd-Cu Nanointerface and TiO2 Morphology

et al. 2021

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“…They informed of a remarkable change in the adsorption rate of MB (90%) using the CS-AA-TiO 2 hybrid hydrogel (0.20 g) compared with CS-AA (60%) in pH-dependent response with an optimum pH value of 10, mainly associated with the porosity and large surface area of the hybrid hydrogel. El-Ella et al [93] investigated the carcinogenic ethidium bromide (EtBr) efficiency degradation (in aqueous media at pH 12 and aeration condition) using a chitosan-polyvinylidene-TiO 2 :Au hybrid composite under sunlight conditions (400-600 W/m 2 ). They found that the hybrid film removes 70 to 90% of the EtBr dye, where 60% of it was photodegraded in the first 60 min.…”

Section: Environmental Applications Of Chitosan-tio 2 Hybrid Materialsmentioning

confidence: 99%

Use of Titanium Dioxide (TiO2) Nanoparticles as Reinforcement Agent of Polysaccharide-Based Materials

et al. 2020

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In recent years, a strong interest has emerged in polysaccharide-hybrid composites and their potential applications, which have interesting functional and technological properties. This review summarizes and discusses the reported advantages and limitations of the functionalization of conventional and nonconventional polysaccharides by adding TiO2 nanoparticles as a reinforcement agent. Their effects on the mechanical, thermal, and UV-barrier properties as well as their water-resistance are discussed. In general, the polysaccharide–TiO2 hybrid materials showed improved physicochemical properties in a TiO2 content-dependent response. It showed antimicrobial activity against bacteria (gram-negative and gram-positive), yeasts, and molds with enhanced UV-protective effects for food and non-food packaging purposes. The reported applications of functionalized polysaccharide–TiO2 composites include photocatalysts (dye removal from aqueous media and water purification), biomedical (wound-healing material, drug delivery systems, biosensor, and tissue engineering), food preservation (fruits and meat), cosmetics (sunscreen and bleaching tooth treatment), textile (cotton fabric self-cleaning), and dye-sensitized solar cells. Furthermore, the polysaccharide–TiO2 showed high biocompatibility without adverse effects on different cell lines, indicating that their use in food, pharmaceutical, and biomedical applications is safe. However, it is necessary to evaluate the structural changes promoted by the storage conditions (time and temperature) on the physicochemical properties of polysaccharide–TiO2 hybrid composites to guarantee their stability during a determined time.

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“…Therefore, one alternatif to overcome the problem is through a bioremediation strategy. Youssef et al (2020) reported a photocatalytic degradation strategy for ethidium bromide and has successfully degraded 60% of the dye within one hour [4]. Furthermore, another bioremediation strategy should be implemented for rapid ethidium bromide degradation, such as technology with enzymes that have a highly specific compound targeted.…”

Section: Introductionmentioning

confidence: 99%

In silico recombinant plasmid design of pHA171 with phdABCD insertion for ethidium bromide degradation

et al. 2021

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Background: Ethidium bromide is a common reagent that is used in nucleic acid staining. However, ethidium bromide has toxic and carcinogenic properties that are harmful to the environment. Phenanthrene dioxygenase (encoded by phdA, phdB, phdC, and phdD genes) in Nocardioides sp. KP7 can oxidize the phenanthridine structure aim to eliminate carcinogenic properties. Objective: This study aims to visualize and predict the structure, active site, and characteristics of the phenanthrene dioxygenase using bioinformatics tools. Methods: Plasmid design were prepared by inserting genes of interest phdA, phdB, phdC, and phdD from the NCBI database. Furthermore, several protein analysis tools were used for structure visualization, active site enzyme improvement, and protein characteristic of phenanthrene dioxygenase. Results: The prediction results found that phenanthrene dioxygenase reacts with the ethidium bromide substrate through the interaction of Fe3+ ions with water. The solubility level of phenanthrene dioxygenase protein is 0.404, suggesting that the protein has low solubility. The protein isoelectric point (pI) is between 5.17 to 5.36, and the protein molecular weight is 121.143 kDa. Conclusion: In silico analysis has supported that recombinant plasmid met characteristics for the construct which consists of gene interest and protein library.

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Synthesis of high efficient CS/PVDC/TiO2-Au nanocomposites for photocatalytic degradation of carcinogenic ethidium bromide in sunlight

Cited by 6 publications

References 23 publications

CO Oxidation at Near-Ambient Temperatures over TiO2-Supported Pd-Cu Catalysts: Promoting Effect of Pd-Cu Nanointerface and TiO2 Morphology

CO Oxidation at Near-Ambient Temperatures over TiO2-Supported Pd-Cu Catalysts: Promoting Effect of Pd-Cu Nanointerface and TiO2 Morphology

Use of Titanium Dioxide (TiO2) Nanoparticles as Reinforcement Agent of Polysaccharide-Based Materials

In silico recombinant plasmid design of pHA171 with phdABCD insertion for ethidium bromide degradation

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