Hierarchically 1D CdS decorated on 2D perovskite-type La2Ti2O7 nanosheet hybrids with enhanced photocatalytic performance

• 作者: Liang Mao Xiao-Yan Cai Ming-Shan Zhu
• 来源期刊: 稀有金属（英文版）
• 年，卷（期）: 2021,（5）
• 所属期刊栏目: ORIGINAL ARTICLES
• 页码范围: 1067-1076
• 页数: 10页
• 语种: 英文

摘要

In this paper,a heterojunction of hierarchically one-dimensional(1D)cadmium sulfide(CdS)nanowires decorated on the two-dimensional(2D)La2Ti2O7(LTO)has been fabricated by a simple two-step hydrothermal process.The structure,morphology and surface chemical composition of CdS/LTO were studied by a variety of characterizations,in which the X-ray photoelectron spec-troscopy(XPS)results showed a strong interaction between CdS and LTO through S-O bonds.The type Ⅱ band alignment of CdS/LTO for favorable electron transfer from CdS to LTO and hole transfer from LTO to CdS was clarified by ultraviolet-visible(UV-Vis)diffuse reflec-tance spectroscopy and Mott-Schottky(M-S)plot mea-surements.In the absence of any co-catalyst,H2 production from water splitting and Rhodamine B(RhB)decomposi-tion in aqueous solution were carried out to evaluate the photocatalytic activities,showing that the photocatalytic performance of CdS/LTO was superior to that of pure LTO and CdS under visible light and simulated sunlight.The optimal CdS content in the CdS/LTO system was determined to be 7.5 wt％.The present results show an effective pathway to design a 1D/2D heterojunction pho-tocatalyst in the face of overwhelming problems of energy crisis and environmental pollution.