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Monodisperse carbon nanospheres (CNs-APAM) with different APAM incorporation amounts were prepared by an assisted hydrothermal method using glucose, anionic polyacrylamide (APAM) as raw material. The samples were characterized and tested using SEM, FTTR, XRD, TG, and ultraviolet-visible spectrophotometer (UV-vis). The effects of APAM addition on the dispersion and yield of carbon nano spheres (CNs) and the adsorption performance of CNs on methylene blue (MB) with different APAM additions were investigated. Tt was shown that the best dispersion and highest yield of CNs were achieved at the addition of APAM at 1 20 mg, with the yield up to 21.5 %• The adsorption results showed that CNs-APAM had the best adsorption effect on MB with the maximum adsorption amount of 124.26 mg • g-1 when the addition amount of APAM was 1 20 mg, the adsorption time was about 2 h, the concentration of MB solution was 30 mg/L, and the initial pH of the solution was 100. The fitting results of the adsorption model showed that the process of MB adsorption by CNs-APAM was consistent with Langmuir model with quasi-secondary kinetic model. [ABSTRACT FROM AUTHOR]

Two novel stigmasterol derivatives as gelators are synthesized，and named as compounds 1 and 2， respectively. The structure and properties of gels are studied by scanning electron microscopy（SEM），Fourier transform infrared spectroscopy（FT-IR）and UV-Vis spectrophotometer. The results of the gelation properties of compounds 1 and 2 show that they could gelate in DMSO and methanol. Compound 1 also forms a stable gel in DMSO/water mixed solvents at a volume ratio of 9∶1，8∶2，and 7∶3，respectively. In addition，when compounds 1 and 2 are gelated at a mass concentration of 12 mg/mL in DMSO，the gel-sol phase transition temperatures（Tgel）of the two compounds are 51 and 46 ℃，respectively，indicating that the thermal stability of their gelation decreases significantly with the increase of steroidal structural units in the gelator. With the increase of steroid structural units in the gelators，the thermal stability of the gel formation decreases significantly. On this basis，the gel prepared by compound 1 is used as the carrier，and its encapsulation and release in rhodamine B and methylene blue，as well as the anticancer drug doxorubicin are studied by UV-Vis spectroscopy. The results show that the prepared gels could be used as a drug carrier，and the maximum release value reaches 84% in water at 240 min. Furthermore，this study may provide a useful idea for the preparation of stigmasterol derivative gels and its application as a drug carrier in drug delivery. [ABSTRACT FROM AUTHOR]

Polyvinylidene fluoride (PVDF) and tetrabutyl titanate (TBOT) are dissolved in a mixed solvent of N, N'- dimethylformamide (DMF) and acetone to electrospun into a fiber membrane. Then, TBOT contained in the electrospun fiber membrane was reduced to titanium dioxide (TiO2) by a one-step hydrothermal method at 150 °C. The PVDF fiber membrane material with TiO2 grown in situ on the surface and inside of the fiber was obtained. The morphology and structure of TiO2 grown on PVDF fibers in situ were determined by scanning electron microscopy (SEM), thermal gravity (TG), X-ray diffractometer (XRD) and Fourier infrared absorption spectroscopy (FT-IR). Then, the degradation effect of the composite film on the three organic dyes (rhodamine B, methyl orange and methylene blue) was tested by UV-visible spectroscopy. Finally, the gravity-driven method was used to separate the oil-water mixture, and the contact angle of the composite membrane to water and oil was tested to explore the oil-water separation effect of the composite membrane. Results show that the composite membrane has a good degradation effect on organic dyes such as rhodamine B, methyl orange, methylene blue. The composite membrane also has good lipophilic and hydrophobic properties. It is separated by a mixture of carbon tetrachloride and water. The composite membrane can effectively realize oil-water separation, and the oil-water separation efficiency can be as high as 98.2%. [ABSTRACT FROM AUTHOR]

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A comprehensive experiment of sodium dodecyl benzene sulfonate (SDBS) intercalated nickel-titanium layered double hydroxide (NiTi-LDH-SDBS) synthesis and application in dye adsorption is designed. The NiTi-LDH-SDBS with SDBS guest molecule in the interlayer were successfully synthesized, and characterized by X-ray diffraction and infrared spectroscopy. The dye adsorption performance of the intercalation complex and the dye removal rate were quantitatively analyzed by ultraviolet-visible absorption spectroscopy. The results show that the adsorption of methylene blue (MB) on NiTi-LDH-SDBS is better than that of methyl orange (MO), owing to the stronger guest-guest interaction between MB and SDBS. The adsorption behavior of MB on NiTi-LDH-SDBS accords with Langmuir adsorption isotherm and pseudo-second-order equation, the calculated saturated adsorption amount was 181.2 mg/g, which was basically consistent with the experimental measurement of 176.4 mg/g. [ABSTRACT FROM AUTHOR]