Abstract
A novel magnetic Cd(II)-imprinted fluorescent CdTe quantum dot (Fe3O4@CdTe-IIP) was synthesized through chemical etching strategy without the use of functional monomer and cross-linkers, and was used as an adsorbent for the removal of Cd(II) from water. Fe3O4@CdTe-IIP not only shows much higher adsorption capacity and selectivity for Cd(II) than the non-imprinted counterpart (Fe3O4@CdTe), but also exhibits good photoluminescence and magnetism. The adsorption capacities of Fe3O4@CdTe-IIP and Fe3O4@CdTe for Cd(II) ions are 17.57 and 8.03mg/g, respectively. The studies of adsorption kinetics show that the adsorption rate of Fe3O4@CdTe-IIP is fast, and the adsorption process fits well with a pseudo-second-order model. Moreover, the progress of the adsorption of Cd(II) ions on Fe3O4@CdTe-IIP can be monitored according to color change of Fe3O4@CdTe-IIP because of its fluorescent recovery.
Original language | English |
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Pages (from-to) | 186-193 |
Number of pages | 8 |
Journal | Colloids and Surfaces A: Physicochemical and Engineering Aspects |
Volume | 462 |
DOIs | |
Publication status | Published - 1 Nov 2014 |
Scopus Subject Areas
- Surfaces and Interfaces
- Physical and Theoretical Chemistry
- Colloid and Surface Chemistry
User-Defined Keywords
- Cd(II)
- EDTA-etching method
- Magnetic ion imprinted CdTe quantum dots
- Selectivity