Facile synthesis of few-layer MoS2 in MgAl-LDH layers for enhanced visible-light photocatalytic activity
Facile synthesis of few-layer MoS2 in MgAl-LDH layers for enhanced visible-light photocatalytic activity
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在 MgAl-LDH 层中轻松合成少层 MoS2 以增强可见光光催化活性
DOI：
10.1039/c9ra03858b
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发表时间：
2019-08
期刊：
影响因子：
3.9
通讯作者：
Fei Long
中科院分区：
文献类型：
--
作者：
Guoyuan Zheng;Caihong Wu;Jilin Wang;Shuyi Mo;Yanwu Wang;Zhengguang Zou;Bing Zhou;Fei Long
采用两步水热合成法制备了一种新型光催化剂--生长在MgAl-LDH中间层中的少层MoS_2(MoS_2/MgAl-LDH)。利用粉末X射线衍射仪、拉曼光谱、场发射扫描电子显微镜、高分辨透射电子显微镜、傅立叶变换红外光谱、X射线光电子能谱、光致发光光谱和紫外-可见吸收光谱等测试手段对所制得材料的结构和光催化性能进行了表征。MoS_2/Al-LDH复合材料在低浓度(50mgL−1和100mgL−1)下对甲基橙(MO)的降解表现出良好的光催化性能。此外，即使在高达2 0 0 mg L−1的MO溶液中，该复合材料在12 0min也表现出较高的降解率(~gt；84%)和矿化率(~gt；73%)。结果表明，MoS_2/MgAl-LDH复合材料在废水处理中具有很大的应用潜力。
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.
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