15.3.2 Cyclodextrin-Functionalized Magnetic Materials for
Adsorption and Separation
CD-MNP-based nano-adsorbents have played an important role in the adsorption
and separation of bioactive species, drugs, and inorganic or organic pollutants from
several solution media. There are several advantages of CD-MNP adsorbents, such
as (I) easy preparation and eco-friendliness, (II) low-cost and low-reagent consumption, (III) high selectivity and easy manipulation with an external magnetic field,
(IV) being reusable adsorbents, and (V) high pre-concentration factors and combination with other modern detection techniques in online or offline mode. Therefore,
a new trend to fabricate CD-decorated MNPs adsorbents can be regarded as the
promising way in the development of applied materials for water treatment and
biomedicine.
For CD-functionalized MNPs, the use of these materials for the abatement of
environmental toxicants has been increasing continuously. The heavy metal ions
[56, 63–65], radionuclides [54, 66], and organic molecules [51, 67–69] have been
mNBF
V
Incubation time: 10 min
100
80
60
40
20
0
0
0.5
Potential / V vs. Ag/AgCl
Current /
μA
L-TRP
D-TRP
1
1 . 5
–20
Electrochemical tool: CV
(iii) Enantiorecognition
(ii) Entrapment
(i) mNBFs addition
CoFe 2 O 4 –NPs
a
b
Au/CoFe 2 O 4 –NPs
β-CD-SH/Au/CoFe 2 O 4 –NPs
(i) Au 3+
(iii) β-CD-SH
(iv) Sonication
in water
(ii) NaBH 4
Fig. 5 Schematic illustration of (a) the preparation of chiral mNBF; (b) the enantiorecognition
assay for L- and D-TRP discrimination at the electrochemical cell via cyclic voltammetry.
(Reproduced from Ref. 61, 2018 Elsevier B.V)
436
W. Liang and S. Shuang
Adsorption and Separation
CD-MNP-based nano-adsorbents have played an important role in the adsorption
and separation of bioactive species, drugs, and inorganic or organic pollutants from
several solution media. There are several advantages of CD-MNP adsorbents, such
as (I) easy preparation and eco-friendliness, (II) low-cost and low-reagent consumption, (III) high selectivity and easy manipulation with an external magnetic field,
(IV) being reusable adsorbents, and (V) high pre-concentration factors and combination with other modern detection techniques in online or offline mode. Therefore,
a new trend to fabricate CD-decorated MNPs adsorbents can be regarded as the
promising way in the development of applied materials for water treatment and
biomedicine.
For CD-functionalized MNPs, the use of these materials for the abatement of
environmental toxicants has been increasing continuously. The heavy metal ions
[56, 63–65], radionuclides [54, 66], and organic molecules [51, 67–69] have been
mNBF
V
Incubation time: 10 min
100
80
60
40
20
0
0
0.5
Potential / V vs. Ag/AgCl
Current /
μA
L-TRP
D-TRP
1
1 . 5
–20
Electrochemical tool: CV
(iii) Enantiorecognition
(ii) Entrapment
(i) mNBFs addition
CoFe 2 O 4 –NPs
a
b
Au/CoFe 2 O 4 –NPs
β-CD-SH/Au/CoFe 2 O 4 –NPs
(i) Au 3+
(iii) β-CD-SH
(iv) Sonication
in water
(ii) NaBH 4
Fig. 5 Schematic illustration of (a) the preparation of chiral mNBF; (b) the enantiorecognition
assay for L- and D-TRP discrimination at the electrochemical cell via cyclic voltammetry.
(Reproduced from Ref. 61, 2018 Elsevier B.V)
436
W. Liang and S. Shuang