studying the adsorption process of riboflavin on silver-deposited fe3o4 nanoparticles

نویسندگان

morteza akhond

department of chemistry, shiraz university, shiraz, 71454, iran ghodratollah absalan

professor massoumi laboratory, department of chemistry, faculty of sciences, shiraz university, shiraz 71454, iran elmira rafatmah

department of chemistry, shiraz university, shiraz, 71454, iran

چکیده

the adsorption characteristics of riboflavin onto silver-deposited iron oxide magnetic nanoparticles (ag/fe3o4) have been described. characterization of the synthesized ag/fe3o4 nanoparticles was achieved by ftir spectra, tem image and xrd pattern. the influence of several experimental parameters such as nanoparticles dosage, ph of the sample solution, different orientations of the riboflavin molecules toward ag/fe3o4 surface, riboflavin concentration, contact time of the reagents, temperature, ionic strength and presence of halide anions were studied. experimental data indicated that ag/fe3o4 nanoparticles adsorb more than 90% of riboflavin under the optimum experimental conditions of the adsorbent dosage of 4.0 mg, a ph of 6.0, and a contact time of 2.0 min, when an initial riboflavin concentration of 0.02 mm is used. the results revealed that the presence of halide anions lower the adsorption of riboflavin on the surface of nanoparticles due to dissolution of the silver layer of the nanoparticles. it was found that the adsorption isotherm is best fitted to dubinin-radushkevich and freundlich models and kinetic model followed a pseudo-second-order adsorption rate.

برای دانلود باید عضویت طلایی داشته باشید

برای دانلود متن کامل این مقاله و بیش از 32 میلیون مقاله دیگر ابتدا ثبت نام کنید

اگر عضو سایت هستید لطفا وارد حساب کاربری خود شوید

منابع مشابه

Studying the Adsorption Process of Riboflavin on Silver-Deposited Fe3O4 Nanoparticles

The adsorption characteristics of riboflavin onto silver-deposited iron oxide magnetic nanoparticles (Ag/Fe3O4) have been described. Characterization of the synthesized Ag/Fe3O4 nanoparticles was achieved by FTIR spectra, TEM image and XRD pattern. The influence of several experimental parameters such as nanoparticles dosage, pH of the sample solution...

متن کامل

Studying the Adsorption Process of Riboflavin on Silver-Deposited Fe3O4 Nanoparticles

The adsorption characteristics of riboflavin onto silver-deposited iron oxide magnetic nanoparticles (Ag/Fe3O4) have been described. Characterization of the synthesized Ag/Fe3O4 nanoparticles was achieved by FTIR spectra, TEM image and XRD pattern. The influence of several experimental parameters such as nanoparticles dosage, pH of the sample solution, different orientations of the riboflavin m...

متن کامل

Microdispersed Colloid Silver Nanoparticles Studying and Properties

In this review article are studied the methods for preparation of micro dispersed colloid silver nanoparticles and scopes of their practical application in nano-industry, bionanotechnology, medicine and allied industries, including water processing and water purification techniques. The mechanisms of bactericidal influence of colloid silver on a microbial cell are discussed from the point of vi...

متن کامل

Ligand-Depended Adsorption Characteristics of Silver Nanoparticles on Activated Carbon

Surface modification and functionalization has been an important tool for scientists in order to open new frontiers in nanoscience and nanotechnology. Desired surface characteristics for the intended applications can be achieved with surface functionalization. In this work, the effect of water soluble ligands on the adsorption capabilities of silver nanoparticles onto AC which was synthesized f...

متن کامل

survey on the antibacterial effect of silver nanoparticles deposited on textile fabrics

background: according to the recent studies, the antibacterial activities of silver nanoparticles (ag-nps) were studied on gram-positive staphylococcus aureus and gram-negative escherichia coli. in this study antibacterial effect of silver nanoparticles that used for coating textiles, on e.coli and s.aureus was investigated. methods: silver nanoparticles were coated on textile fabric by corona ...

متن کامل

the impact of portfolio assessment on iranian efl students essay writing: a process-oriented approach

this study was conducted to investigate the impact of portfolio assessment as a process-oriented assessment mechanism on iranian efl students’ english writing and its subskills of focus, elaboration, organization, conventions, and vocabulary. out of ninety juniors majoring in english literature and translation at the university of isfahan, sixty one of them who were at the same level of writing...

15 صفحه اول

منابع من

با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید


عنوان ژورنال:
analytical and bioanalytical chemistry research

جلد ۳، شماره ۲، صفحات ۲۲۵-۲۳۷

میزبانی شده توسط پلتفرم ابری doprax.com

copyright © 2015-2023