Jump to main content
US EPA
United States Environmental Protection Agency
Search
Search
Main menu
Environmental Topics
Laws & Regulations
About EPA
Health & Environmental Research Online (HERO)
Contact Us
Print
Feedback
Export to File
Search:
This record has one attached file:
Add More Files
Attach File(s):
Display Name for File*:
Save
Citation
Tags
HERO ID
1639201
Reference Type
Journal Article
Title
Cyclodextrin-Functionalized Fe3O4@TiO2: Reusable, Magnetic Nanoparticles for Photocatalytic Degradation of Endocrine-Disrupting Chemicals in Water Supplies
Author(s)
Chalasani, R; Vasudevan, S
Year
2013
Is Peer Reviewed?
1
Journal
ACS Nano
ISSN:
1936-0851
EISSN:
1936-086X
Book Title
ACS Nano.
Volume
7
Issue
5
Page Numbers
4093-4104
Language
English
PMID
23600646
DOI
10.1021/nn400287k
Web of Science Id
WOS:000319856300046
Abstract
Water-dispersible, photocatalytic Fe3O4@TiO2 core-shell magnetic nanoparticles have been prepared by anchoring cyclodextrin cavities to the TiO2 shell, and their ability to capture and photocatalytically destroy endocrine-disrupting chemicals, bisphenol A and dibutyl phthalate, present in water, has been demonstrated. The functionalized nanoparticles can be magnetically separated from the dispersion after photocatalysis and hence reused. Each component of the cyclodextrin-functionalized Fe3O4@TiO2 core-shell nanoparticle has a crucial role in its functioning. The tethered cyclodextrins are responsible for the aqueous dispersibility of the nanoparticles and their hydrophobic cavities for the capture of the organic pollutants that may be present in water samples. The amorphous TiO2 shell is the photocatalyst for the degradation and mineralization of the organics, bisphenol A and dibutyl phthalate, under UV illumination, and the magnetism associated with the 9 nm crystalline Fe3O4 core allows for the magnetic separation from the dispersion once photocatalytic degradation is complete. An attractive feature of these "capture and destroy" nanomaterials is that they may be completely removed from the dispersion and reused with little or no loss of catalytic activity.
Keywords
beta-cyclodextrin; Fe3O4@TiO2 core-shell nanocrystals; endocrine-disrupting chemicals; photocatalytic degradation; magnetic separation
Tags
IRIS
•
Dibutyl Phthalate (DBP)
Database Searches
Pubmed
Web of Science
LitSearch Dec 2012 - June 2013
PubMed
LitSearch June 2013 – Jan 2014
Web of Science
Excluded: No Primary Data on Health Effects
Chemical treatment/ disposal/remediation
Home
Learn about HERO
Using HERO
Search HERO
Projects in HERO
Risk Assessment
Transparency & Integrity