119th General Meeting of the KCS

Type Poster Presentation
Area 물리화학
Room No. 포스터발표장
Time 4월 20일 (목요일) 11:00~12:30
Code PHYS.P-54
Subject Transition metal doped Molybdenum Sulfide (M-MoS2) Ultrathin Nanosheets as Co-catalyst for Photocatalytic Hydrogen Production via Water Splitting
Authors 홍상엽, DHARANI PRAVEEN KUMAR, devulapalliamaranathareddy, 김태규*
부산대학교 화학과, Korea
Abstract Transition metal dichalcogenides(TMDs) semiconductors are studied to apply to co-catalyst for photocatalytic hydrogen evolution reaction(HER) via water splitting. Due to its 2D layer structures, it has a structural stability and also can help to separate photo-excited charge carriers. Among these semiconductors, molybdenum sulfide(MoS2) is one of the most promising candidate, because it can be replaced noble-metal and is earth-abundant. Our previous work, loading liquid exfoliated ultrathin monolayer MoS2 onto CdS nanorods was confirmed that it has amazingly higher efficiency for photocatalytic HER than bulk MoS2, because of broadened surface and more exposed active edge site. To enhance photocatalytic effect, we synthesized transition metal(M = Fe, Co, and Cu) doped MoS2 and confirmed photocatalytic efficiency. Transition metal doping effect is expected that it can control conduction band of MoS2. As a result, M-MoS2 is a more effective co-catalyst for HER than MoS2. Especially Cu doped MoS2 was demonstrated the highest efficiency among four metals. The optimized Cu-MoS2/CdS exhibited more higher hydrogen production rate about 194.18 mmol·h-1·g-1 than MoS2/CdS that has production rate of 130.0 mmol·h-1·g-1. And we checked its durability and analyzed the its properties with various characterization techniques.
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