Recent progresses on ion beam irradiation induced structure and performance modulation of two-dimensional materials

Abstract

Ion beam irradiation techniques have been demonstrated to have obvious advantages in manipulating the structure and performance of 2D materials. This paper reviews the research progress in the interaction between energetic ions and 2D materials.

Defect Engineering of MoS2 Nanosheets by Heavy-Ion Irradiation for Hydrogen Evolution

“…10− 15 Unlike traditional chemical synthesis methods where only one element can be doped into a material, ion irradiation technology can be used to simultaneously dope several elements without introducing impurities, and defect vacancies are created during the irradiation process. 16 Because of the inevitable appearance of secondary phases and impurities during conventional chemical synthesis methods, the type of dopant used during doping is also limited, and the 1T-MoS 2 structure is metastable; therefore, the catalyst is unstable in long-time reactions. 17−19 However, heavy-ion radiation can solve these problems.…”

“…It is necessary to design and develop high-performance low-cost hydrogen evolution reaction (HER) catalysts to improve the hydrogen production efficiency of water electrolysis and promote the development and utilization of hydrogen energy, and HER catalysts are one of the key factors for achieving large-scale applications of hydrogen energy. – As a representative of transition metal dichalcogenide (TMD) materials, molybdenum disulfide (MoS 2 ) with abundant resource reserves and a unique structure has shown great potential in hydrogen evolution catalysis. However, it exhibits unsatisfactory efficiency in the HER process due to inherent limitations such as inadequate conduction and an inert basal plane. – Developing effective regulation methods to modify the catalytic activity of MoS 2 and replace platinum-based catalysts has become a hot topic of research in recent years. – Unlike traditional chemical synthesis methods where only one element can be doped into a material, ion irradiation technology can be used to simultaneously dope several elements without introducing impurities, and defect vacancies are created during the irradiation process . Because of the inevitable appearance of secondary phases and impurities during conventional chemical synthesis methods, the type of dopant used during doping is also limited, and the 1T-MoS 2 structure is metastable; therefore, the catalyst is unstable in long-time reactions. – However, heavy-ion radiation can solve these problems.…”