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  • 02월 19일 10시 이후 : 초록수정 불가능, 일정확인 및 검색만 가능

제121회 대한화학회 학술발표회, 총회 및 기기전시회 안내 Facile formation of WSe2 from (Cat+)2[WSe4] complexes: Mechanistic study using TG-MS

2018년 2월 2일 10시 52분 06초
INOR.P-39 이곳을 클릭하시면 발표코드에 대한 설명을 보실 수 있습니다.
4월 19일 (목요일) 11:00~12:30
Inorganic Chemistry
저자 및
jahee Kim, Chang-Gyoun Kim1,*, TAEK-MO CHUNG2,*, Bo Keun Park3
Korea Research Institute of Chemical Technology, University of Science & Technology, Korea
1Chemical Materials Division, Korea Research Institute of Chemical Technology, Korea
2Chemical Materials Division Center for Thin Film M, Korea Research Institute of Chemical Technology, Korea
3Center for Thin Film Materials, Korea Research Institute of Chemical Technology, Korea
Transition metal dichalcogenides (TMDCs) have been widely studied for various applications such as future electronic materials and catalysts. Among them, WSe2 has especially attracted the attention due to its p-type semiconductor property, compared to n-type semiconductor of MoS2. However, large scale synthesis of WSe2 film has not been widely studied because the suitable precursor is not commercially available. Sodium salt of [WSe4]2- was synthesized by the reaction of W(CO)6 with Na2Se4. Sodium cation could be easily exchanged with tetraphenyl phosphonium (Ph4P+), cetyltrimethyl ammonium (cta+), and tetraethyl ammonium (Et4N+) cations. We have studied thermal decomposition of (Cat+)2[WSe4] complexes, resulting in the formation of WSe2 by TG-MS. Nanoflakes of WSe2 were synthesized by solvo-thermal decomposition of (Cat+)2[WSe4] with capping ligand. There is no need for a external reducing agent during the preparation of WSe2 from (Cat+)2[WSe4] due to the internal redox reaction between W and Se.