A novel rod-shape sonocatalyst Sr(OH)2·8H2O was prepared by a facile precipitation method, and characterized by X-ray powder diffraction, transmission electron microscopy, Fourier transform infrared spectroscopy and UV-vis absorption spectroscopy. Comparative sonocatalytic degradation experiments were carried out in different conditions under ultrasonic irradiation by using rhodamine B (RhB) as the model substrate, indicating that Sr(OH)2·8H2O was highly sonocatalytic. Total organic carbon experiment demonstrated Sr(OH)2·8H2O with mass mineralization of organic carbon. The effects of catalyst amount, initial RhB concentration and ultrasonic energy of degradation were investigated, and the sonocatalyst could be reused 5 times without significant loss of activity. Furthermore, the potent degrading capability was ascribed to ultrasonic cavitation producing flash light/energy which generated radicals (e.g., OH) with high oxidation activity.

Fe3O4–β-CD@MIPs were synthesized by UAPP using MAA as a functional monomer and EGDMA as a crosslinker in the presence of Fe3O4–β-CD nanoparticles as the template and baicalein (BAI) as the imprinting molecule.

This paper describes a rational design and testing of molecularly imprinted polymers (MIPs) as chiral stationary phases of thin-layer chromatography (TLC) for enantiomeric purity of naproxen. Using D-naproxen as template, MIPs with particle size between 10~90 μm were prepared by precipitation polymerization in acetonitrile/methanol mixed solvent. The interactions between functional monomers and template were verified by UV absorption spectrometry. The morphology, particle size distribution and specific surface area of MIPs were also observed by scanning electron microscopy, particle size distribution meter and liquid nitrogen adsorption instrument, respectively. Binding capacities of MIPs had been studied by equilibrium binding assay. Preparation conditions of TLC and impact of acetic acid content on the separation of enantiomers were investigated. The results indicated that when acetic acid content was 4%, the racemates of templates were completely separated, and the chiral separation factor α was 1.58.

Hollow molecular imprinted polymer microspheres were prepared by distillation precipitation polymerization with (S)-(＋)-ibuprofen (S-IBF) as template molecule and acrylamide (AM) as functional monomer. Using the silicon dioxide (SiO 2 , 180 nm) modified by 3-(trimethoxysilyl)propyl methacrylate (MPS) as the template microspheres, the molecular imprinted shells were coated on successfully (SiO 2 @MIPs). The thermosensitive SiO 2 @MIPs-PNIPAM core-shell microspheres were subsequently prepared by grafting the PNIPAM chains (M n ＝ 1.21×10 4 g/mol, polydispersity index＝1.30), which were prepared by reversible addition-fragmentation chain transfer (RAFT) polymerization, on the surface of SiO 2 @MIPs microspheres via the thiol-ene click chemistry. The grafting density of PNIPAM brushes on the SiO 2 @MIPs microspheres was about 0.18 chains/nm 2 . After HF etching, the hollow imprinted microspheres were finally obtained. For thermosensitivity analysis, the phase transition temperatures of multifunctional nanoparticles were measured by DSL at 25 and 45 ℃ respectively, ℃ and the sizes of the microspheres changed by about 35 nm. The modified microspheres presented excellent controlled release property to S-IBF, moreover about half amount of the adsorptions passed into acetonitrile-water solution through the specific holes of imprinted shell at 25 ℃ under vibration.