title: A novel molecularly imprinted material based on magnetic halloysite nanotubes for rapid enrichment of 2,4-dichlorophenoxyacetic acid in water.
abstract: A new type of magnetic halloysite nanotubes molecularly imprinted polymer (MHNTs@MIP) based on halloysite nanotubes (HNTs) with embedded magnetic nanoparticles was introduced in this study. MHNTs@MIP was prepared through surface imprinting technology, using 2,4-dichlorophenoxyacetic acid (2,4-D) as a template, 4-vinylpyridine as the monomer, divinylbenzene as cross-linking agents, and 2,2-azodiisobutyronitrile as initiator. MHNTs@MIP was characterized by Fourier Transform Infrared Spectrometer, transmission electron microscopy, X-ray diffraction, and vibrating sample magnetometer. MHNTs@MIP exhibited rapid and reliable analysis with supermagnetic properties, as well as repeated use and template-specific recognition. The adsorption capacity of magnetic halloysite nanotubes non-imprinted polymer (MHNTs@NIP) and MHNTs@MIP was 10.3mg/g and 35.2mg/g, respectively. In the detailed discussion on specific selectivity, MHNTs@MIP can be applied as an adsorbent for sample pretreatment extraction and obtain high recoveries of about 85-94%. After extraction, high-performance liquid chromatography was used to detect 2,4-D residue in water.
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Shian
authors.initials: S
authors.lastname: Zhong
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Chengyun
authors.initials: C
authors.lastname: Zhou
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Xiaona
authors.initials: X
authors.lastname: Zhang
authors.affiliation: Cancer Hospital of Xiangya Medical College, Central South University, Changsha 410013, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Zhou
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Hui
authors.initials: H
authors.lastname: Li
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China.
authors.forename: Xiaohong
authors.initials: X
authors.lastname: Zhu
authors.affiliation: School of Chemistry and Chemical Engineering, Central South University, Changsha 410083, China. Electronic address: yanwangcsu@163.com.
authors.forename: Yan
authors.initials: Y
authors.lastname: Wang
mesh_terms: D015084:2,4-Dichlorophenoxyacetic Acid / Q000737:chemistry*; D000538:Aluminum Silicates / Q000737:chemistry*; D000077215:Clay; D006540:Herbicides / Q000737:chemistry*; D008280:Magnetics; D054802:Molecular Imprinting; D043942:Nanotubes; D014867:Water / Q000737:chemistry*
chemical_list: D000538:Aluminum Silicates; D006540:Herbicides; D014867:Water; D015084:2,4-Dichlorophenoxyacetic Acid; D000077215:Clay
keywords: 2,4-Dichlorophenoxyacetic acid; Magnetic halloysite nanotubes; Molecularly imprinted polymer; Surface imprinting