CAJ | 학술논문

利用电纺丝技术制得钯/碳纳米纤维复合材料(Pd/CNFs),并将其用于修饰玻碳电极Pd/CNF-GCE/CME.Pd/CNF-GCE/CME对邻苯二酚和对苯二酚的氧化还原反应具有较高的电催化活性,显著提高了二者电化学反应的可逆性.考察了支持电解质的酸度对邻苯二酚和对苯二酚电化学响应的影响,选用0.1 mol/L PBS(pH 8.0)作为支持电解质.用微分脉冲伏安(DPV)法对邻苯二酚和对苯二酚进行选择性检测:当混合溶液中存在50 μmol/L对苯二酚时,邻苯二酚的氧化峰电流与其浓度在1～90 μmol/L范围内呈线性关系,检出限为0.3 μmol/L(S/N=3);当存在50 μmol/L邻苯二酚时,对苯二酚的氧化峰电流与其浓度在2～100 μmol/L范围内呈线性关系,检出限为1.0 μmol/L.另外,此修饰电极具有较好的重现性和较强的抗干扰能力.将此修饰电极用于模拟水样中邻苯二酚和对苯二酚的测定,结果令人满意.
이용전방사기술제득파/탄납미섬유복합재료(Pd/CNFs),병장기용우수식파탄전겁Pd/CNF-GCE/CME.Pd/CNF-GCE/CME대린분이분화대분이분적양화환원반응구유교고적전최화활성,현저제고료이자전화학반응적가역성.고찰료지지전해질적산도대린분이분화대분이분전화학향응적영향,선용0.1 mol/L PBS(pH 8.0)작위지지전해질.용미분맥충복안(DPV)법대린분이분화대분이분진행선택성검측:당혼합용액중존재50 μmol/L대분이분시,린분이분적양화봉전류여기농도재1～90 μmol/L범위내정선성관계,검출한위0.3 μmol/L(S/N=3);당존재50 μmol/L린분이분시,대분이분적양화봉전류여기농도재2～100 μmol/L범위내정선성관계,검출한위1.0 μmol/L.령외,차수식전겁구유교호적중현성화교강적항간우능력.장차수식전겁용우모의수양중린분이분화대분이분적측정,결과령인만의.
Palladium nanoparticle/carbon nanofibers(Pd/CNFs) were prepared by electrospinning technique with subsequent thermal treatments and were employed to modify glassy carbon electrode (Pd/CNF-GCE/ CME). Pd/CNF-GCE/CME exhibited excellent electrocatalytic activities towards catechol and hydroquinone,and the reversibility of catechol and hydroquinone were significantly improved. The effects of pH value on the oxidation peak current and potential of catechol and hydroquinone were studied by differential pulse voltamme-try(DPV),and 0. 1 mol/L PBS(pH 8.0) was selected as the supporting electrolyte. Under the optimized conditions,the oxidation peak current of catechol was linearly with the concentration of catechol in the range of 1-90μmol/L in the presence of 50 μmol/L hydroquinone with the detection limit of 0.3μmol/L(S/V =3) and the oxidation peak current of hydroquinone was linearly with the concentration of hydroquinone in the range of 2 - 100μmol/L in the presence of 50 μmol/L catechol with the detection limit of 1. 0μmol/L. Furthermore,the modified electrode exhibited good reproducibility and selectivity. The modified electrode has been used for the determination of catechol and hydroquinone in imitative water samples with satisfactory results.