Fabrication of Z-Scheme Fe2O3-MoS2-Cu2O Ternary Nanofilm with Significantly Enhanced Photoelectrocatalytic Performance
Fabrication of Z-Scheme Fe2O3-MoS2-Cu2O Ternary Nanofilm with Significantly Enhanced Photoelectrocatalytic Performance
复制标题
Z型Fe2O3-MoS2-Cu2O三元纳米薄膜的制备，光电催化性能显着增强
DOI：
10.1021/acs.iecr.7b04089
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发表时间：
2018-01-24
影响因子：
4.2
通讯作者：
Zhang, Yi
中科院分区：
文献类型：
--
作者：
Cong, Yanqing;Ge, Yaohua;Zhang, Yi
采用电沉积法和水热法制备了Fe2O3-MoS2-Cu2O三元纳米复合材料。采用扫描电子显微镜（SEM）、X射线衍射（XRD）和X射线光电子能谱（XPS）对薄膜进行了表征。结果表明，MoS2和Cu2O颗粒成功地沉积在Fe2O3颗粒表面。MoS2和Cu2O共镀对Fe2O3薄膜的光电化学性能有协同作用。Fe_2O_3-MoS_2-Cu_2O薄膜的光生电流密度最高，分别为Fe_2O_3、Fe_2O_3-MoS_2和Fe_2O_3-Cu_2O薄膜的20倍、5.5倍和2倍。结果表明，该复合材料具有良好的光电催化性能，其光电催化性能主要归因于Z型电子转移机理，即电荷转移快、氧化还原能力强。本工作为环境净化和水氧化提供了一种有前途的Z型三元半导体。
Ternary Fe2O3-MoS2-Cu2O nanocomposites were fabricated via electrodeposition and hydrothermal method. The as-prepared photocatalytic films were characterized by scanning electron microscopy (SEM), X-ray diffraction (XRD), and X-ray photoelectron spectroscopy (XPS). The results indicated that MoS2 and Cu2O particles were successfully deposited onto the surface of Fe2O3 particles. MoS2 and Cu2O coloading, achieved a synergetic effect on the improvement of the photoelectrochemical performance of Fe2O3 film. The highest photocurrent density was achieved on Fe2O3-MoS2-Cu2O film, which was 20, similar to 5.5, and 2 times those of Fe2O3, Fe2O3-MoS2, and Fe2O3-Cu2O films, respectively. The excellent photoelectrocatalytic performance was attributed to the Z-scheme electron transfer mechanism, which results in the fast charge transfer and strong redox ability on the ternary composite. This work provides a promising Z-scheme ternary semiconductor for environmental purification and water oxidation.