121st General Meeting of the KCS

Type Poster Presentation
Area Material Chemistry
Room No. Event Hall
Time 4월 20일 (금요일) 11:00~12:30
Code MAT.P-528
Subject Photoelectrochemical reduction of carbon dioxide on Carbon QDs/PANI/TiO2 NRs Photoelectrode
Authors Hyun Kim, dongyun kim, Bee Lyong Yang*
School of Materials Science and Engineering, Kumoh National Institute of Technology, Korea
Abstract We report exploiting effective carbon QDs grafting to enhance the photoelectrochemical activity of PANI/TiO2 NRs films, applied as photoanodes for photoelectrocatalytic (PEC) CO2 reduction into methanol (CH3OH). The in situ carbon QDs/PANI/TiO2 NRs films were prepared on a fluorine-doped tin oxide (FTO) substrates by a hydrothermal method for TiO2 NRs growth, then chemical polymerization for PANI Coating and finally impregnation in carbon dots solution. C QDs and Polyaniline coating were confirmed with an X-ray photoelectron spectroscopy (XPS), TEM and SEM analysis. Comparing the PEC properties, Carbon QDs/PANI/TiO2 NRs cathode exhibits the highest photocurrent density vs. (Ag/AgCl/Sat.KCl), which is approximately 2 times higher than that of the uncoated films. The highest methanol yield increased significaly after carbon QDs grafting. Based on the electrochemical and photoelectrochemical analysis, the enhanced PEC performance in C QDs/PANI/TiO2 NRs films owe to its improved carriers density, electrical conductivity, and electrons lifetime. The possible photocatalytic mechanism was proposed which is beneficial for further improving the activity of photocatalysts. The approach described in this study provides a simple and reliable strategy for the rational design of efficient visible light-driven photo catalysts for photoreduction of CO2 to hydrocarbons. Acknowledgement This research was supported by the International Research & Development Program of the National Research Foundation of Korea (NRF) funded by the Ministry of Education, Science and Technology (MEST) (2017K1A3A1A21013524) *Corresponding Author: (BeeLyong Yang), (Kumoh National Institute of Technology, Korea), (blyang@kumoh.ac.kr)
E-mail h219@hanmail.net