PDF(Pubmed)
Abstract：
Cu2ZnSnSe4 (CZTSe) nanoparticles (NPs) were successfully synthesized via a solvothermal method. Their structural, compositional, morphological, optoelectronic, and electrochemical properties have been characterized by X-ray diffraction (XRD), Raman spectroscopy, X-ray photoelectron spectroscopy (XPS), Field-emission scanning electron microscopy (FE-SEM), transmission electron microscope (TEM), UV-vis absorption spectroscopy, and electrochemical impedance spectroscopy (EIS) techniques. Porosimetry and specific surface area in terms of the Brunauer-Emmett-Teller (BET) technique have also been studied. XRD indicates the formation of a polycrystalline kesterite CZTSe phase. Raman peaks at 173 and 190 cm-1 confirm the formation of a pure phase. TEM micrographs revealed the presence of nanoparticles with average sizes of ~90 nm. A BET surface area of 7 m2/g was determined. The CZTSe NPs showed a bandgap of 1.0 eV and a p-type semiconducting behavior. As a proof of concept, for the first time, the CZTSe NPs have been used as a visible-light-driven photocatalyst to Congo red (CR) azo dye degradation. The nanophotocatalyst material under simulated sunlight results in almost complete degradation (96%) of CR dye after 70 min, following a pseudo-second-order kinetic model (rate constant of 0.334 min-1). The prepared CZTSe was reusable and can be repeatedly used to remove CR dye from aqueous solutions.
摘要：
通过溶剂热法成功合成了Cu2ZnSnSe4（CZTSe）纳米颗粒（NPs）。他们的结构，组成,形态学,光电，用X射线衍射(XRD)对电化学性能进行了表征,拉曼光谱,X射线光电子能谱(XPS),场发射扫描电子显微镜(FE-SEM),透射电子显微镜（TEM），紫外-可见吸收光谱,和电化学阻抗谱(EIS)技术。还研究了Brunauer-Emmett-Teller（BET）技术的孔隙率和比表面积。XRD表明形成了多晶钾盐CZTSe相。173和190cm-1的拉曼峰证实了纯相的形成。TEM显微照片显示存在平均尺寸为〜90nm的纳米颗粒。测得7m2/g的BET表面积。CZTSeNP显示出1.0eV的带隙和p型半导体行为。作为概念的证明，第一次,CZTSeNP已被用作刚果红（CR）偶氮染料降解的可见光驱动光催化剂。在模拟阳光下，纳米光催化材料在70分钟后几乎完全降解（96％）的CR染料，遵循伪二级动力学模型(速率常数为0.334min-1)。制备的CZTSe可重复使用，可重复使用，可重复用于从水溶液中去除CR染料。
