Preparation and Characterization of Acetic Acid-Functionalized Fe3O4@SiO2 Nanoparticles as an Efficient Nanocatalyst for the Synthesis of Nitrones in Water

Shendy, Saeid Ahmadizadeh; Shahverdizadeh, Gholam Hossein; Babazadeh, Mirzaagha; Hosseinzadeh‐Khanmiri, Rahim; Es’haghi, Moosa

doi:10.1007/s12633-019-00252-z

Cited by 9 publications

(1 citation statement)

References 34 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…227 Acetic acid is functionalized onto Fe3O4/SiO2 nanoparticles through APTES for catalyzing the synthesis of nitrone in water. 228 Moreover, trifluoroacetic acid (OOCCF3 -) can be modified on the APTES-MONPs through ionic interaction with ammonium cation on the aminopropyl function. 229 The synthetic solid catalyst is recyclable during the Friedlä nder annulation reaction, for the synthesis of quinoline.…”

Section: Catalyst and Enzyme Immobilizationmentioning

confidence: 99%

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Zhang¹

View full text Add to dashboard Cite

Metal oxide nanoparticles (MONPs) are massively produced for various industrial, environmental and biomedical applications due to their high surface reactivity and unique chemical and physical properties. Among all the manufactured MONPs, human exposure to zinc oxide (ZnO) nanoparticles may cause significant health concerns. This leads to a desire for efficient methods for their facile detection in the aqueous environment. In this work, two detection methods and one removal method were developed to selectively detect or remove ZnO nanoparticles in contaminated water with the presence of other MONPs.A detection method based on the fluorescence quenching of meso-tetra(4carboxyphenyl) porphyrin (TCPP) has been developed to treat water samples containing MONPs. Quenching of the TCPP emission intensity at 650 nm provides a Stern-Volmer plot with adequate sensitivity for the detection of 0.15 mg/mL ZnO nanoparticles.Meanwhile, a unique emission peak at 605 nm is observed and can be used for the identification and quantitation of ZnO nanoparticles down to 0.0015 mg/mL. A removal method using 3-aminopropyltriethoxysilane (APTES) has been proved to sediment ZnO nanoparticles in aqueous suspension with TCPP as a color indicator for ZnO. When 2.0% (v) APTES is applied to treat water samples containing ≥ 0.5 mg/mL of ZnO nanoparticles, a web-like sediment adheres onto the glass vial bottom from APTES-ZnO conjugation. A high removal efficiency of over 99% (w) ZnO nanoparticles was attained using APTES.Another detection method has been developed using electroanalytical analysis by firstly drop-casting MONPs on a screen-printed electrode. When phenol is analyzed as a iii chemical probe by cyclic voltammetry (CV), measurement of the reduction current provides adequate sensitivity for the indirect quantitation of 0.1 mg/mL ZnO nanoparticles.Both the oxidation peak and charge storage capacity measured from the cyclic voltammogram are proportional to the ZnO nanoparticle concentration and can afford a better detection limit of 0.01 mg/mL. Overall, the above methods are labour and cost effective and can afford high selectivity towards ZnO detection or removal in the presence of other MONPs.Additionally, the electrochemical analysis method and the APTES sedimentation method can differentiate ZnO nanoparticles from Zn 2+ and zinc peroxide (ZnO2) nanoparticles.iv PrefaceThis preface provides full bibliographical details for each article included in this thesis, as well as whether the article is reproduced in whole or in part. Permission was obtained from the publishers to include the articles in the thesis. When citing material from this thesis, please cite the article relevant to the chapter, if the chapter is based on a publication.Pursuant to the Integrated Thesis policy of Carleton University, the "supervisor" (Edward P.C. Lai) and the "student" (Wenyu Zhang) confirm that the student was fully involved in setting up and conducting the research, obtaining data and analyzing results, as well as preparing and writing the material pres...

show abstract

Section: Catalyst and Enzyme Immobilizationmentioning

confidence: 99%

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Zhang¹

View full text Add to dashboard Cite

show abstract

Silica Encapsulated-Gold Nanoparticles as a Nano-reactor for Aerobic Oxidation of Benzyl alcohols and Tandem Oxidative A3 coupling Reactions in Water

et al. 2020

View full text Add to dashboard Cite

Hemocompatibility and Antioxidant Properties of Nano-Sized Barium Titanate in Cubic and Tetragonal System

Ivanov,

Filimonova,

Sirotkin

et al. 2024

J Clust Sci

View full text Add to dashboard Cite

Preparation and Characterization of Acetic Acid-Functionalized Fe3O4@SiO2 Nanoparticles as an Efficient Nanocatalyst for the Synthesis of Nitrones in Water

Cited by 9 publications

References 34 publications

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Selective Detection and Removal of Zinc Oxide Nanoparticles in Contaminated Water

Silica Encapsulated-Gold Nanoparticles as a Nano-reactor for Aerobic Oxidation of Benzyl alcohols and Tandem Oxidative A3 coupling Reactions in Water

Hemocompatibility and Antioxidant Properties of Nano-Sized Barium Titanate in Cubic and Tetragonal System

Contact Info

Product

Resources

About