Simultaneous Synthesis and Doping of Two-Dimensional New Materials

Simultaneous Material Synthesis and Pore Defect 'Doping'
Large-Area 2D Material Synthesis Using Liquid Precursors

Researcher Lee Jeong-hyun (left) and Professor Park Hye-sung (right)

[Asia Economy Reporter Junho Hwang] A technology that can simultaneously synthesize materials and dope pore defects (atomic vacancies) has been developed. This technology allows for the uniform distribution of pore defects in two-dimensional materials by controlling liquid precursors.

The research team led by Professors Hyesung Park, Jinyoung Kim, and Sangkyu Kwak at Ulsan National Institute of Science and Technology announced on the 27th that they developed a technology to uniformly dope pore defects (vacancies of sulfur atoms) inside the molybdenum disulfide structure. The results of this study were published in the international journal ACS Nano.

The team controlled the ratio of two types of liquid precursors containing molybdenum and sulfur elements respectively, to uniformly regulate the pore defects in the synthesized molybdenum disulfide. For example, when the ratio of the liquid precursor containing sulfur is low, the sulfur component inside the molybdenum disulfide becomes deficient during the synthesis process, naturally creating pore defects where sulfur atoms are missing.

The molybdenum disulfide produced in this way had uniform pore defects, making it highly useful. Using the newly developed synthesis method, the research team utilized the molybdenum disulfide as a catalyst for chemical reactions to obtain hydrogen from water. The pore defects promoted charge transfer and other processes, resulting in excellent hydrogen production performance. In particular, this method allows the material synthesis and doping processes to be conducted simultaneously, enabling cost reduction through shortened processing steps.

Jung Hyun Lee, a first author and doctoral researcher in the Department of Materials Science and Engineering, explained, "The synthesis method developed this time can be used to control the properties of various transition metal compounds beyond molybdenum disulfide."

Professor Hyesung Park stated, "The transition metal compound synthesis method developed through this research enables large-area synthesis and property control simultaneously, and is expected to be applicable not only in the field of electrochemical catalyst development but also in the development of various semiconductor device materials such as transistors and CMOS."

Performance Evaluation of Transition Metal Compounds with Doped Voids as Catalysts for Hydrogen Production

This content was produced with the assistance of AI translation services.