Preparation and Properties of Surface Ion Imprinted Material Based on Molybdenum Disulfide Nanoflowers

doi:10.19894/j.issn.1000-0518.220411

Chinese Journal of Applied Chemistry ›› 2023, Vol. 40 ›› Issue (7): 1024-1033.DOI: 10.19894/j.issn.1000-0518.220411

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Preparation and Properties of Surface Ion Imprinted Material Based on Molybdenum Disulfide Nanoflowers

Yan-Bin WU, Li-Zhen LI, Jun-Hua LI, Zhi-Feng XU()

College of Chemistry and Materials Science，Hengyang Normal University； Key Laboratory of Functional Organometallic Compounds of Hunan Province； Engineering Research Center for Monitoring and Treatment of Heavy Metals Pollution in the Upper Reaches of Xiangjiang River，Hengyang 421008，China

Received:2022-12-25 Accepted:2023-06-10 Published:2023-07-01 Online:2023-07-19
Contact: Zhi-Feng XU
About author:1760321030@qq.com
Supported by:
the Scientific Research Fund of Hunan Provincial Education Department(20A073)

Abstract

Abstract:

In the present work， a thin layer of Cd（?Ⅱ?） ion imprinted polymer is fabricated on the surfaces of molybdenum disulfide nanoflowers through the self-polymerization of dopamine by using Cd（?Ⅱ?） ion as the template， dopamine as the functional monomer and cross-linker. The morphology and structure of the prepared ion-imprinted material （IIM） are charactterized by scanning electron microscopy （SEM）， infrared spectroscopy （IR）， X-ray diffraction （XRD）， N₂ adsorption-desorption analysis and thermal gravimetric analysis （TGA）. Results of binding experiments show that IIM has a high imprinting effect （the imprinting factor is 6.877） and high specific recognition ability for Cd（?Ⅱ?） ion. The specific binding capacity is 518.1 μmol/g. IIM also has a fast binding rate because the imprinted sites of IIM has good accessibility for Cd（Ⅱ） ion. The time needed to reach equilibrium binding is 25 min. Scatchard plot analysis reveals that the binding sites of IIM are heterogeneous with respect to the affinity for Cd（?Ⅱ?） ion and could be classified into two groups， i.e.， the higher-affinity portion and the lower-affinity portion. In addition， the adsorption behavior of IIM for Cd（Ⅱ） ion is in line with the Langmuir isotherm adsorption model and the maximum adsorption capacity is determined through this model and is found to be 1081 μmol/g. The present study has provided a new convenient and reliable approach for preparation of imprinted material with high recognition ability for target heavy metal ion.

Key words: Ion imprinted material, Molybdenum disulfide nanoflowers, Dopamine, Cd（?Ⅱ?） ion, Recognition ability

CLC Number:

O643.3

Yan-Bin WU, Li-Zhen LI, Jun-Hua LI, Zhi-Feng XU. Preparation and Properties of Surface Ion Imprinted Material Based on Molybdenum Disulfide Nanoflowers[J]. Chinese Journal of Applied Chemistry, 2023, 40(7): 1024-1033.

Figures/Tables 8

Fig.1 The preparation process of IIM

Fig.2 SEM images of prepared MoS2 （A， B）， IIM（C） and NIM （D）

Fig.3 FT-IR （A） and XRD spectra （B） of MoS2， IIM and NIM

Fig.4 TGA curves （A） and N2 adsorption-desorption isotherms （B） of MoS2， IIM and NIM

Fig.5 Kinetic binding profiles of Cd（Ⅱ） ion to IIM and NIM

Fig.6 （A） Binding isotherm of IIM and NIM；（B） Scatchard plot analysis of the binding of Cd（Ⅱ） to IIM

Fig.7 The Langmuir isotherm model （A） and Freundlich isotherm model （B） of IIM for Cd（Ⅱ） adsorption

Table 1 Cp，ΔCp， Kd andIF values of the tested metal ions on IIM and NIM under equilibrium binding conditions*

		Cd²⁺	Pb²⁺	Cu²⁺	Ni²⁺	Mn²⁺	Fe³⁺
IIM	C_p/（μmol·g^-1）	648.6	20.5	181.4	107.7	68.5	88.3
NIM	C_p/（μmol·g^-1）	130.5	10.2	133.4	78.4	47.6	71.5
	ΔC_p/（μmol·g^-1）	518.1	10.3	48.0	29.3	20.9	16.8
IIM	K_d/（L·g^-1）	0.480 0	0.010 3	0.099 7	0.056 9	0.035 5	0.046 1
NIM	K_d/（L·g^-1）	0.069 8	0.005 1	0.071 4	0.040 7	0.024 3	0.037 1
	IF	6.877	2.020	1.396	1.398	1.461	1.242

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Preparation and Properties of Surface Ion Imprinted Material Based on Molybdenum Disulfide Nanoflowers

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