Synthesis of FeS and FeSe Nanoparticles from a Single Source Precursor: A Study of Their Photocatalytic Activity, Peroxidase-Like Behavior, and Electrochemical Sensing of H2O2
Synthesis of FeS and FeSe Nanoparticles from a Single Source Precursor: A Study of Their Photocatalytic Activity, Peroxidase-Like Behavior, and Electrochemical Sensing of H2O2
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DOI：
10.1021/am300408r
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发表时间：
2012-04-01
影响因子：
9.5
通讯作者：
Adhikary, Bibhutosh
中科院分区：
文献类型：
--
作者：
Dutta, Amit Kumar;Maji, Swarup Kumar;Adhikary, Bibhutosh
在硫脲和亚硒酸钠存在下，以[Fe-3（mu（3）-O）（mu（2）-O2 CCH 2Cl）（6）（H2O）（3）]NO3中心点H2O为前驱体，通过溶剂热分解法制备了纳米晶FeS和FeSe化合物。采用X射线衍射分析（XRD）、场发射扫描电镜（FESEM）、透射电镜（TEM）和紫外可见光谱（UV-vis）对产物进行了表征。结构分析表明，FeS和FeSe纳米粒子（NPs）分别由针状和球形粒子组成。在白色光照射下，FeS和FeSe纳米粒子对玫瑰红（RB）和亚甲基蓝（MB）染料具有光催化降解活性。它们对3，3 ′，5，5 ′-四甲基联苯胺（TMB）在H_2O_2存在下的氧化反应也表现出良好的催化活性，符合Michaelis-Menten动力学。此外，FeS和FeSe纳米颗粒都表现出对过氧化氢还原的电催化活性，其固定在玻碳（GC）电极上作为电流传感器用于检测H2 O2。在pH7.0时，FeS/GC对H2 O2的线性范围为5 ~ 140 μ M，而FeSe/GC的线性范围为5 ~ 100 μ M。
Nanocrystalline FeS and FeSe compounds were prepared by solvothermal decomposition of a precursor complex [Fe-3(mu(3)-O)(mu(2)-O2CCH2Cl)(6)(H2O)(3)]NO3 center dot H2O in the presence of thiourea and sodium selenite, respectively. The as-obtained products were characterized by X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FESEM), transmission electron microscopy (TEM), and UV-vis spectroscopic techniques. Structural analyses revealed that the FeS and FeSe nanoparticles (NPs) are composed of needle-like and spherical particles, respectively. The FeS and FeSe NPs showed photocatalytic activity for the decomposition of rose bengal (RB) and methylene blue (MB) dyes under white light illumination. They also showed good catalytic activity toward oxidation of 3,3',5,5'-tetramethylbenzidine (TMB) in the presence of H2O2 and followed Michaelis-Menten kinetics. In addition, both FeS and FeSe NPs exhibited electrocatalytic activity toward reduction of hydrogen peroxide, which on immobilization on glassy carbon (GC) electrodes perform as amperometric sensors for detection of H2O2. At pH 7.0, the FeS/GC showed a linear range for detection of H2O2 from 5 to 140 mu M, while for FeSe/GC the range was 5 to 100 mu M.