Facile synthesis of few-layer MoS2 in MgAl-LDH layers for enhanced visible-light photocatalytic activity,RSC Advances

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Facile synthesis of few-layer MoS2 in MgAl-LDH layers for enhanced visible-light photocatalytic activity
RSC Advances ( IF 3.9 ) Pub Date : 2019-08-05 00:00:00 , DOI: 10.1039/c9ra03858b
Guoyuan Zheng _{1,

2} , Caihong Wu _{1,

2} , Jilin Wang _{1,

2} , Shuyi Mo _{1,

2} , Yanwu Wang ₃ , Zhengguang Zou _{1,

2} , Bing Zhou _{1,

2} , Fei Long _{1,

2}

Affiliation

A new photocatalyst, few-layer MoS₂ grown in MgAl-LDH interlayers (MoS₂/MgAl-LDH), was prepared by a facile two-step hydrothermal synthesis. The structural and photocatalytic properties of the obtained material were characterized by several techniques including powder X-ray diffraction (XRD), Raman spectroscopy, field emission scanning electron microscopy (FESEM), high-resolution transmission electron microscopy (HRTEM), Fourier transform infrared spectroscopy (FTIR), X-ray photoelectron spectroscopy (XPS), photoluminescence spectroscopy (PL) and UV-vis absorption spectroscopy. The MoS₂/MgAl-LDH composite showed excellent photocatalytic performance for methyl orange (MO) degradation at low concentrations (50 mg L⁻¹ and 100 mg L⁻¹). Furthermore, even for a MO solution concentration as high as 200 mg L⁻¹, this composite also presented high degradation efficiency (>84%) and mineralization efficiency (>73%) at 120 min. The results show that the MoS₂/MgAl-LDH composite has great potential for application in wastewater treatment.

中文翻译：

在 MgAl-LDH 层中轻松合成少层 MoS2 以增强可见光光催化活性

通过简便的两步水热合成制备了一种新型光催化剂，生长在 MgAl-LDH 中间层 (MoS _{2 /MgAl-LDH) 中的少层 MoS}_{2 。}所获得材料的结构和光催化性能通过多种技术表征，包括粉末X射线衍射（XRD）、拉曼光谱、场发射扫描电子显微镜（FESEM）、高分辨率透射电子显微镜（HRTEM）、傅里叶变换红外光谱(FTIR)、X 射线光电子能谱 (XPS)、光致发光光谱 (PL) 和紫外可见吸收光谱。MoS ₂ /MgAl-LDH 复合材料在低浓度（50 mg L ^-1和 100 mg L^-1 )。此外，即使MO溶液浓度高达200 mg L^-1，该复合材料在120分钟时也表现出高降解效率（> 84%）和矿化效率（> 73%）。结果表明，MoS₂ /MgAl-LDH复合材料在废水处理中具有很大的应用潜力。

更新日期：2019-08-05

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