Fe3O4@MoS2 Core鈥揝hell Composites: Preparation, Characterization, and Catalytic Application

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• 作者：Tianran Lin ; Jing Wang ; Liangqia Guo ; Fengfu Fu
• 刊名：Journal of Physical Chemistry C
• 出版年：2015
• 出版时间：June 18, 2015
• 年：2015
• 卷：119
• 期：24
• 页码：13658-13664
• 全文大小：306K
• ISSN：1932-7455

文摘

Molybdenum disulfide (MoS₂) has received tremendous attention due to the earth-abundant composition and high catalytic activity. However, the catalytic activity of MoS₂ except electro- and photocatalytic has seldom been explored. Herein, Fe₃O₄@MoS₂ core鈥搒hell composites were prepared for the first time by in situ growth of MoS₂ nanosheets on the surfaces of Fe₃O₄ nanoparticles under different temperature, and the catalytic performance of the resulting composites was evaluated by using the catalytic reduction of 4-nitrophenol to 4-aminophenol. FE-SEM, TEM, XRD, and XPS analyses verified the core鈥搒hell structure with MoS₂ nanosheets of defect-rich and oxygen incorporation on the surfaces of Fe₃O₄ nanoparticles. Fe₃O₄@MoS₂ composites were found to exhibit a high catalytic activity for the reduction of 4-nitrophenol with the highest activity factor k = 3773 min^鈥? g^鈥?. A plausible catalytic mechanism for the reduction of 4-nitrophenol was also proposed. This study presents an inexpensive, reusable, fast, and highly efficient catalyst for the reduction of 4-nitrophenol without noble metals.