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Water-compatible surface imprinting of 'Saccharin sodium' on silica surface for selective recognition and detection
Song Zhao1, Xin Yang2, Haitian Zhao2
1Department of Food Sciences, School of Chemical Engineering & Technology, Harbin Institute of Technology, No. 73 Huanghe Road, Nangang District, Harbin, Heilongjiang Province 150090, PR China; Key Laboratory of Agro-product Quality and Safety, Institute of Quality Standard & Testing Technology for Agro-Product, Chinese Academy of Agricultural Sciences, 100081 Beijing, PR China.
Abstract:
In this work, a saccharin sodium imprinted nanoparticles composite material has been successfully synthesized in aqueous solution. This molecular imprinted material has promising practical utility in the detection of saccharin sodium. First, we synthesized SiO2 nanoparticles, followed by the modification of functional amino group. Then we used functionalized SiO2@NH2 as the cores, saccharin sodium as the template, acrylic acid (AA) as the functional monomer and ammonium persulphate (APS) as the initiator. Molecularly imprinted nanoparticles (MIPs) were synthesized by surface-imprinted polymerization under airtight tubes at 60 °C for 12 h. MIPs were characterized by transmission electron microscopy (TEM), scanning electron microscopy (SEM), Fourier transform infrared spectroscopy (FT-IR), and thermal gravimetric analysis (TGA). The binding experiments were shown to have relatively high adsorption capacity (8.965 mg g(-1)) and selective recognition ability over structurally related compounds. Therefore, MIPs provide a sensitive and selective approach and offer the potential to become a new key for the detection of saccharin sodium.
