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铁氰化钆修饰电极对鸟嘌呤的电催化氧化及应用 总被引:2,自引:0,他引:2
用电化学沉积法制备了稀土铁氰化钆修饰玻碳电极(GdHCF/GC/CME),考察了该电极对鸟嘌呤的电催化氧化性能,同时根据Fenton反应产生的羟基自由基对鸟嘌呤的氧化作用和修饰电极氧化作用之间的竞争机理,对抗坏血酸清除羟基自由基进行了初步评价.实验结果表明,修饰电极对鸟嘌呤具有很好的电催化氧化性能.在HAc-NaAc缓冲液(pH=5.1)中,鸟嘌呤在1.0×10-6~4.6×10-5 mol/L浓度范围内与其氧化峰电流呈良好的线性关系,其线性回归方程为Ip(μA)=0.1112C 2.8715,r=0.9889;检出限为3.3×10-7 mol/L.以此电极评价抗坏血酸对羟基自由基的清除作用,取得了较好的效果,为羟基自由基清除剂的筛选提供了一种新的方法. 相似文献
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IntroductionOflate,thereisagreatinterestintheimprovementofleaddioxideasananodematerialforelectrosynthesis,ozonegenerationandwastewatertreatmentowingtoitshighelectri calconductivity ,largeoxygenoverpotentialandchemicalin ertness.1 5PbO2 canbeobtainedasanodicdepositsfromsolu tionsofthelow valenceions,basicstudiesontheseelec trodesaremainlyconfinedtothenucleationgrowthprocessofleaddioxidecrystallites ,ormodifiedbyothercationsinordertoimproveitsproperties.6 However,itselectrocatalyticactivi tydepe… 相似文献
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将丝素还原HAuCl4制备的纳米金/丝素溶胶修饰在金电极表面制备了纳米金/丝素复合膜修饰电极,用于对苯二酚的催化氧化。实验表明,该修饰电极具有很好的电化学性能,在pH3.55磷酸盐缓冲溶液中以该修饰电极对对苯二酚进行检测,对苯二酚在4.0×10-6~1.0×10-4mol/L浓度范围内,其氧化峰电流与浓度呈良好的线性关系,其线性回归方程为i(μA)=0.2614 5.3539c,r=0.9995;检出限为2.0×10-7mol/L,灵敏度良好,用于实际样品分析,结果令人满意。 相似文献
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均一形貌的ZnO纳米棒的制备及其光催化性能研究 总被引:20,自引:0,他引:20
ZnO nanorods were synthesized from high purity Zn granule by a vapor phase deposition in the Ar + O2 gas. The products were characterized by X-ray diffraction (XRD) and scanning electron microscope (SEM). The ZnO nanorods were typically 1~2 μm in length and 20~30 nm in diameter with an aspect ratio as high as 20. The UV absorption properties were detected and the results show that the ZnO nanorods have an extremely strong absorption at 200~380 nm wavelength. The results were good when the ZnO nanorods were used as photocatalyst. 相似文献
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