Abstract
The optimization of catalyst synthesis conditions using traditional single factor method involves extensive experimental time and costs. To overcome the drawbacks, a uniform design method was applied in the hydrothermal synthesis of nano MoS2 catalyst. An optimal synthesis condition is reached with only a few trials. Catalyst synthesis temperature is reduced to 200 °C. The catalyst synthesized at the screened condition shows high hydrotreating activities. The results conclude that the catalyst has thread-like slabs with a lattice structure that is less mature than fully developed MoS2. The characterization results indicate that the appearance of such structure may be due to the weak links of successive MoS2 nuclei. The high catalytic activity is a result of the layered structure and a significantly large number of defects on the slabs.
Highlights
Two-dimensional (2D) materials have historically been one of the most extensively studied classes of materials [1,2,3]
X-ray diffraction (XRD) patterns exhibit only one single phase. These results suggest that chemical reaction and results, it is tending to conclude that the Moofframework of CAT-5 is less efficiently formed wasEXAFS
The catalyst synthesized at 200 ◦ C (CAT-5) is selected after the screening of uniform design
Summary
Two-dimensional (2D) materials have historically been one of the most extensively studied classes of materials [1,2,3]. The discovery of single-layer graphene in 2004 by Novoselov and Geim has led to a paradigm for the investigation of novel 2D materials and their physical properties [4]. MoS2 has nano-crystalline structures with stacked slabs and various morphologies [5,6], and is one of the well-studied families that have shown extraordinary optical, electrical, and mechanical properties [7,8]. It has been reported that the properties of MoS2 can be influenced by a large number of factors, e.g., the concentration of precursors, pH values, reaction temperature and time, heating rate, stirring speed, etc. To efficiently investigate these factors and quickly screen for the optimal combination of the parameters, a proper experimental design is of great importance
Sign-in/Register to view highlights & summary 
Published Version (
Free)
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call