Evaluating the efficiency of the GO‐Fe3O4/TiO2 mesoporous photocatalyst for degradation of chlorpyrifos pesticide under visible light irradiation

Zangiabadi, Mostafa; Shamspur, Tayebeh; Saljooqi, Asma; Mostafavi, Ali

doi:10.1002/aoc.4813

Cited by 39 publications

(10 citation statements)

References 48 publications

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“…Then, the second weight loss happens from 100 to 500 C, which can be assigned to the removal of the labile oxygen-containing functional groups as CO, CO 2 and H 2 O vapors from the sample caused by the destruction of oxygenated functional groups. As expected, Fe 3 O 4 NPs exhibited no obvious mass change with the increase of temperature to 600 C. [25] Compared with GO-Fe 3 O 4 , the differential thermal analysis (DTA) curve of GO-Fe 3 O 4 -PEG shows a broad peak (Figure 6b) in the region of 50-200 C, which verifies PEGylation of GO-Fe 3 O 4 . In addition, a new peak appeared in the DTA curve of GO-Fe 3 O 4 -PEG-Cur compared with GO-Fe 3 O 4 -PEG, confirming the loading of Cur.…”

Section: Tgasupporting

confidence: 68%

Synthesis and characterization of PEGylated iron and graphene oxide magnetic composite for curcumin delivery

Abbasi

Amjad

Nosrati

et al. 2020

Applied Organom Chemis

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Nowadays, nanostructures have been given significant attention in medical and biological fields. Among these nanostructures, graphene oxide (GO) has been widely used in drug delivery systems, because of its unique properties, and the ability to connect to other nanostructures such as magnetic nanoparticles (NPs) as well as polymers by its functional groups. In this research, first, GO was prepared by exfoliating graphite according to the modified Hummer’s method, and then the Fe3O4 NPs were synthesized by a simple co‐precipitation method on GO nanosheets. In the next step, with the help of the ethyl‐3‐(3‐dimethylaminopropyl) carbodiimide/N‐hydroxysuccinimide coupling reagents, the polyethylene glycol (PEG) polymer was bonded to the GO‐Fe3O4 nanocomposite. Finally, anti‐cancer drug, curcumin (Cur) was loaded onto the nanocomposite and the Cur loading ratio was measured at about 8%. The samples were evaluated using Fourier transform‐infrared, differential scanning calorimtery, vibrating‐sample magnetometry, atomic force microscopy and dynamic light scattering techniques. The results show that the prepared nanocomposite is an appropriate candidate for biomedical applications.

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Section: Tgasupporting

confidence: 68%

Synthesis and characterization of PEGylated iron and graphene oxide magnetic composite for curcumin delivery

Abbasi

Amjad

Nosrati

et al. 2020

Applied Organom Chemis

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“…shows two emissions at 352 nm and 800 nm; the former shows strong intensity and can be related to the electron transition from O 2to Ti 4+ . The observed peak at the visible range proposes an ideal composite for photocatalytic activities [25,26]. The DRS shows the bandgap energy of the Ag/TiO 2 /PVA nanocomposite around 2.9 eV, which is lower than the observed bandgap energy for pristine TiO 2 (3.5 eV) [27].…”

Section: -1-characterization Of the Synthesized Ag/tio2/pva Nanocompo...mentioning

confidence: 80%

Visible-light-responsive Ag/TiO2/PVA nanocomposite for photocatalytic degradation of Cr, Ni, Zn, and Cu heavy metal ions

Dehghani

Delnavaz

2022

Preprint

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The rapid growth of industrialization has led to the uncontrolled pollution of the environment, and rapid action is needed. This study synthesized Ag/TiO2/polyvinyl alcohol (PVA) nano photocatalyst for promising light-derived photocatalytic removal of heavy metal ions. The design of experiment (DOE) was used to study the effect of important factors (pH, reaction time, and photocatalyst dosage) to maximize the final performance of the photocatalyst. In the optimized condition, the Ag/TiO2/PVA nano-photocatalyst removed more than 94% of Cr6+ in 180 minutes, and the efficiency was more than 70% for Cu2+, Zn2+, and Ni2+ metal ions. The adsorption of the heavy metal ions on the photocatalyst was described well with the Langmuir isotherm, while the pseudo-second-order linear kinetic model fitted with the experimental data. The nano-photocatalyst's stability was confirmed after maintaining its performance for five successive runs. The enhanced photocatalytic activity for the heavy metal ions removal can be attributed to the presence of metallic silver nanoparticles (electron transfer and plasmonic fields mechanisms) and PVA, which delayed the recombination of electron-hole. The synthesized ternary Ag/TiO2/PVA nano-photocatalyst showed promising performance for the elimination of heavy metal ions and can be used for environmental remediation purposes.

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“…The maximum photocatalyst dosage that corresponds to the higher activity was estimated by taking a range of photocatalyst dosage between 2.5 -25 mg/ml and keeping other parameters such as pH, time and pesticide concentration constant (Zangiabadi et al 2019).…”

Section: Effect Of Photocatalyst Dosagementioning

confidence: 99%

“…The observed results showed that at pH 7 highest percentage of the degradation of the pesticide takes place, followed by pH 5 and 3 as observed with pH 9 and 11 comparatively (Soltani-nehad et al 2019). At acidic pH, the photocatalyst tends to disassemble as Ag + ions dissolutes to move from the rGO interface hence with reduced activity whereas at alkaline pH the degradation of pesticide reduction shall be due to the reduced activity of the OH˙ radical due to its interaction with OHand forms water and Oion (Nekooie et al 2021;Zangiabadi et al 2019;Majhi et al 2018).…”

Section: Effect Of Phmentioning

confidence: 99%

Green synthesis of rGO-AgNP composite using Curcubita maxima extract for enhanced photocatalytic degradation of the organophosphate pesticide chlorpyrifos

Chinnappa¹,

Ananthai²,

Srinivasan³

et al. 2022

Environ Sci Pollut Res

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Chlorpyrifos is a broad-spectrum organophosphate pesticide widely used for agricultural and nonagricultural applications that can highly intervene and impact with the ecosystem and affects both biotic and abiotic components. Photocatalytic degradation process using nanoparticles and nanocomposites are more fascinating as they are rapid and e cient than the existing other degradation routes. In this study, Curcubita maxima leaves are used as a novel source for green synthesis of reduced graphene oxide -silver composite in a single pot. Characterization of the novel phyto source driven composite was performed by UV-visible spectroscopy, Fourier transform infrared analysis, X-ray diffraction analysis and eld emission scanning electron microscopic methods. The assessment of degradation effect of chlorpyrifos by the synthesized nanocomposite was performed. The photocatalytic activity of the composite was demonstrated through two different process as adsorption under room temperature and photocatalysis in the presence of sunlight. Different parameters such as pH, time, photocatalyst dose and pesticide concentration were optimized. The adsorption isotherms governing the photocatalytic adsorption process were investigated to predict the adsorption capacity of the synthesized nanocomposite. In addition, the results of antimicrobial activity of the nanocomposite against grampositive, gram-negative bacteria and antifungal activity were also been found to be highly promising to utilize this composite for the removal of microbial contaminations in wastewater treatment.

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Evaluating the efficiency of the GO‐Fe₃O₄/TiO₂ mesoporous photocatalyst for degradation of chlorpyrifos pesticide under visible light irradiation

Cited by 39 publications

References 48 publications

Synthesis and characterization of PEGylated iron and graphene oxide magnetic composite for curcumin delivery

Synthesis and characterization of PEGylated iron and graphene oxide magnetic composite for curcumin delivery

Visible-light-responsive Ag/TiO2/PVA nanocomposite for photocatalytic degradation of Cr, Ni, Zn, and Cu heavy metal ions

Green synthesis of rGO-AgNP composite using Curcubita maxima extract for enhanced photocatalytic degradation of the organophosphate pesticide chlorpyrifos

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