Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes

Download

index.pdf

Date

2011-08-01

Author

Shahwan, T.
Abu Sirriah, S.
Nairat, M.
Boyacı, Ezel
Eroglu, A. E.
Scott, T. B.
Hallam, K. R.

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

176
views

0
downloads

Iron nanoparticles were produced using extracts of green tea leaves (GT-Fe NPs). The materials were characterized using TEM. SEM/EDX, XPS, XRD, and FTIR techniques and were shown to contain mainly iron oxide and iron oxohydroxide. The obtained nanoparticles were then utilized as a Fenton-like catalyst for decolorization of aqueous solutions containing methylene blue (MB) and methyl orange (MO) dyes. The related experiments investigated the removal kinetics and the effect of concentration for both MB and MO. The concentrations of dyes in aqueous solution were monitored using ultraviolet-visible (UV-vis) spectroscopy. The results indicated fast removal of the dyes with the kinetic data of MB following a second order removal rate, while those of MO were closer to a first order removal rate. The loading experiments indicated almost complete removal of both dyes from water over a wide range of concentration, 10-200 mg L-1. Compared with iron nanoparticles produced by borohydride reduction, GT-Fe nanoparticles demonstrated more effective capability as a Fenton-like catalyst, both in terms of kinetics and percentage removal.

Subject Keywords

Green synthesis, Iron nanoparticles, Methylene blue, Methyl orange, Fenton catalyst

URI

https://hdl.handle.net/11511/43665

Journal

CHEMICAL ENGINEERING JOURNAL

DOI

https://doi.org/10.1016/j.cej.2011.05.103

Collections

Department of Chemistry, Article

Suggestions

OpenMETU
Core

Green tea extract loaded liposomes: formation, characterization and stability Dağ, Damla; Öztop, Halil Mecit; Department of Food Engineering (2016) Polyphenol-rich green tea extract was encapsulated into liposomes using microfluidization and ultrasonication at two different mediums (acetate buffer and distilled water) to overcome the instability towards oxygen, light, temperature and alkaline conditions. The liposomes loaded with green tea extract by microfluidization were further coated with anionic biopolymers (gum arabic, whey protein) and cationic biopolymer (lysozyme, chitosan) to provide a protective layer over the liposomal surface. The stabilit...
Enzymatic Hydrolysis of Fruit Peels and Other Lignocellulosic Biomass as a Source of Sugar POCAN, Pelin; BAHÇEGÜL, Erinc; Öztop, Halil Mecit; Hamamcı, Haluk (2018-06-01) Glucose and reducing sugars were obtained from corn cobs, orange and pomegranate peels by employing different enzymatic hydrolysis and pretreatment strategies. For the hydrolysis of corn cobs, effect of alkaline pretreatment was examined. Effect of cellobiase loading on hydrolysis was also investigated. Glucose content was measured using a Blood Glucose Monitor. When cellobiase was also added to hydrolysate, glucose and TRS yield increased from 20 and 34% respectively. Unlike corncobs, alkaline pretreatment...
Formation and Characterization of Green Tea Extract Loaded Liposomes DAG, Damla; Öztop, Halil Mecit (2017-02-01) Green tea extract was encapsulated into liposomes to enhance bioavailability and stability of catechins by protecting their functional properties simultaneously. Encapsulation was achieved by dispersing 1% (w/v) soy lecithin through high pressure homogenization (microfluidization) and ultrasonication. Effects of homogenization type and pH of the dispersing medium on the physical properties and stability of the liposomes during 1-mo storage period were investigated. Mean particle size, total phenolic content...
Ultrasound assisted extraction of lipids and antioxidants from wheat germ Melikoğlu, Mehmet; Kıncal, Suzan; Department of Chemical Engineering (2005) The aim of this thesis work was to extract lipids and antioxidants from wheat germ using an ultrasonic bath. Alternative solvents: Ethanol, isopropanol and acetone were used for the extraction purposes and for the fat content determination hexane was used. Alternative solvents dissolve wax, phospholipids and some other proteins because of their polar nature which increased the yield. Since waxes and some proteins can be added to the soaps and creams which were made from carrier oils, obtaining these substan...
Magnetically separable transition metal nanoparticles as catalysts in hydrogen generation from the hydrolysis of ammonia borane Özkar, Saim (2021-06-15) Hydrogen Energy Publications LLCIt reviews the available reports on the preparation and use of magnetically separable transition metal nanoparticles (TMNs) as reusable catalysts for the hydrolytic dehydrogenation of ammonia borane (AB). After a short introduction, the review starts with the papers on the employment of intrinsically magnetic TMNs as catalysts for releasing H2 gas from AB, which includes colloidal nanoparticles of intrinsically magnetic metals, TMNs in combination with materials having large ...

Citation Formats

T. Shahwan et al., “Green synthesis of iron nanoparticles and their application as a Fenton-like catalyst for the degradation of aqueous cationic and anionic dyes,” CHEMICAL ENGINEERING JOURNAL, pp. 258–266, 2011, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/43665.