122nd General Meeting of the KCS

Type Poster Presentation
Area Environmental Energy
Room No. Grand Ballroom
Time 10월 18일 (목요일) 11:00~12:30
Code ENVR.P-508
Subject Conjugated polyene-functionalized graphitic carbon nitride with enhanced photocatalytic water-splitting efficiency
Authors Cheol-Hwan Shin, Gisang Park, Jong-Sung Yu*
Department of Energy Science and Engineering, Daegu Gyeongbuk Institute of Science & Technology, Korea
Abstract Photocatalytic water splitting has attracted the interest from lots of researcher due to its potential application for ready to shortage of natural resource. A graphitic carbon nitride (g-C3N4) is one of the promising photocatalyst and advantages of this material is non-metal based, eco-friend, visble light absorption and easy-approach for systhesis. However, fast recombination rate, slow carrier movement in photocatalyst and durability are still remain as challenges inhibiting photocatalytic hydrogen production. Herein, a g-C3N4/congugated polyene (CP) complex is synthesized through a simple calcination method. The g-C3N4/CP complex showed photocatalytic activity of lower photoluminescence intensity, higher photocurrent density and finally increase of hydrogen poroduction rate. We investigated the role of CP and found that it help the charge separation form g-C3N4 as well as prevent the degradation of photocatalyst during reaction. The best photocatalytic hydrogen production rate of g-C3N4/CP is 1270 μmolg-1h-1 under visible light (420 ≥λ), while the g-C3N4 is 810 μmolg-1h-1. The g-C3N4/CP complex prepared 340℃ exhibits better activity than those at 240 and 400 ℃. We suggest the simple and cost-effective way to prepare non-metal photocatalyst with high photocatalytic activity and hope to be contribute to this area.
E-mail chsih94@dgist.ac.kr