Fullerenol-containing Materials Derived by Sol-gel Processing

Water soluble fullerenols were synthesized and incorporated in SiO2, SiO2-TiO2, GPTMS-SiO2, GPTMS-ATPS inorganic and organic-inorganic materials by sol-gel processes. The maximum concentrations of C60(OH)n and C70(OH)n in the obtained SiO2 gels were estimated to be about 0.6% and 1.5% in weight, respectively. The characteristics of the UV/visible spectra of fullerenols in H2O and various gels were measured and compared. The thermal stability of fullerenols in gels was investigated with differential thermal analysis (DTA). The results indicate that the absorption features of fullerenols in solid gels are similar to those in H2O and the fullerenols in SiO2 are stable at 400℃. The optical limiting effect of the fullerenols was investigated preliminarily.     

The impact of fullerenol nanoparticles on the growth of toxigenic Aspergillus flavus and aflatoxins production in vitro and in corn flour

Antifungal and antimycotoxigenic activity of fullerenol nanoparticles (FNPs) were investigated on Aspergillus flavus growth isolated from a real food sample and aflatoxins (AFs) (AFB₁ and AFB₂) production. The final FNPs concentrations in in vitro and in commercial corn flour after the stationary incubation period of 7 and 14 days were in the range 0.16–80 µg/mL and 0.16–80 µg/g, respectively. Nanocharacterization of FNPs revealed an average size of 5–20 nm and a zeta potential of −35 mV. The highest degree of A. flavus mycelium growth inhibition (28%) after 7 days was observed for applied FNP concentration of 8.0 µg/mL, while after 14 days FNP concentration of 0.32 µg/mL led to the maximal inhibition of A. flavus mycelium growth (36%). Spearman's correlations analysis revealed a strong positive correlation between AFB₁ and AFB₂ concentrations in YES broth after 7 (R = 0.994, p < 0.05) and 14 days (R = 0.976), as well as between AFs concentrations and A. flavus mycelium mass after 7 (R = 0.786 for AFB₁ and R = 0.766 for AFB₂) and 14 days (R = 0.810 for AFB₁ and R = 0.833 for AFB₂). Paired samples t-test showed the existence of a statistically significant difference (p < 0.05) between the produced AFs concentrations after the incubation of 7 and 14 days. Regarding the artificially inoculated corn flour the lower applied FNP concentrations (0.16–0.8 µg/g) achieved a reduction of AFB₁ up to 42% and 60% after 7 and 14 days, respectively.     

C_(60) 羟基化合物结构变化的研究

通过Ｃ６０羟基化合物的红外光谱，紫外可见光谱、酸碱滴定曲线的研究，讨论了ｐＨ值对Ｃ６０羟基化合物结构的影响在中性、碱性介质中，Ｃ６０羟基化合物离解成氧负离子，中性分子与氧负离子达到一平衡，且氧负离子可与体系中阳离子结合，构成醇朴结构在酸性介质中，体系存在有酮醇平衡     

锡/富勒醇复合镀层的制备及其性能研究

制备了锡/富勒醇复合镀层,并研究了富勒醇对复合镀层的性能的影响.复合镀层的制备分两步进行,其中包括电沉积制备富勒醇薄膜和电镀金属锡.采用X射线衍射法(XRD)、辉光放电光谱法(GDS)等手段对富勒醇在镀层中的存在状态进行了表征.结果表明:富勒醇在复合镀层中以非晶态形式存在,且在复合镀层中的分布不均匀.以上结论结合复合镀...     

Electrochemical mass-flow control of hydrogen using a fullerene-based proton conductor

A membrane electrode assembly (MEA) was fabricated using proton conductive hydrogensulfated fullerenol (C₆₀(OSO₃H)_n(OH)_n). Rate-controlled mass flow of hydrogen was performed by applying voltage to both electrodes of the MEA without humidification. The amount of the electrochemically transported hydrogen through the MEA increased as the applied current increased, obeying Faraday's law. Residual gas analysis of the transported hydrogen showed that the transported hydrogen contains trace amounts of water less than 1%.     

富勒醇在镍复合镀层中的热扩散机理

采用富勒醇成膜与电镀镍两步电沉积的方法制备了镍/富勒醇复合材料,并研究了富勒醇在复合镀层中的扩散行为.镀液组成及工艺参数为:NiSO4·7H20 250～350 g/L,NiCl230～60 g/L,H3803 30～40 g/L,十二烷基硫酸钠0.05～0.10 g/L,电流密度10 A/dm2,室温下施镀20 mi...     

锌/富勒醇复合材料的制备及性能研究

制备了锌/富勒醇复合材料并研究了富勒醇对复合材料性能的影响.锌/富勒醇复合材料的制备分两步进行,其中包括电沉积制备富勒醇薄膜和电镀金属锌.采用辉光放电光谱法对富勒醇在镀层中的分布进行了表征.通过对锌/富勒醇复合材料硬度、耐盐雾腐蚀、交流阻抗谱和减摩性测试,分析了富勒醇对复合材料性能的影响.结果表明:富勒醇在锌/富勒醇复...     

Facile and scalable synthesis of a highly hydroxylated water-soluble fullerenol as a single nanoparticle

A water-soluble polyhydroxylated fullerene, i.e. a fullerenol, with 44 hydroxyl groups and 8 secondary bound water molecules, C₆₀(OH)₄₄·8H₂O (estimated average structure), has been synthesized in a facile one step reaction from pristine C₆₀ by hydroxylation with hydrogen peroxide in the presence of a phase-transfer catalyst, tetra-n-butylammonium hydroxide (TBAH), under organic/aqueous bilayer conditions. The fullerenol exhibited high water solubility, up to 64.9 mg/mL, under neutral (pH = 7) conditions. Dynamic light-scattering (DLS) analysis showed a narrow particle size distribution, of 1–2 nm, indicating that the fullerenol had high dispersion properties in water. The results of particle size analyses, which both focused on a single nanoregion and were conducted using a novel induced grating (IG) method and a scanning probe microscope (SPM), were consistent with the DLS results. A plausible reaction mechanism, which includes fullerene oxide intermediates detected by liquid chromatography-mass spectrometry (LC-MS), has been proposed.