Research Summary
Our research focuses include the following topics:
A: Design and development of high efficient photocatalysts for water system purification, water splitting, and CO2 convertion to fuels. Currently we mainly investigate (1) ferrite-based and (2) CNx modification-based photocatalyst materials.
B: Resistance switching properties of various oxide thin films, aiming to have a better understanding of the switching mechanism towards practical memory applications.
C: Synthesis and preparation of oxide nanomaterials for energy related applications.
Research Projects History
2022.03 ～ 2025.02 (NRF of Korea, grant No. 2022R1A2C1004605)
Development of a wide spectrum high efficient CO2 reduction photocatalyst based on the synergistic effects of photothermal conversion, up-conversion and photocatalysis
2019.09 ～ 2022. 02 （NRF of Korea, grant No. 2019R1A2C1086881）
Synthesis of SnFe2O4 with specific exposed facet and its composites and investigation of their artificial photosynthesis properties
2017.06-2020.05 (NRF of Korea, grant No. 2017R1D1A1B03032265
Investigation and development of new intrinsically-rectifying resistance switching memory based on Li ion migration
2014.11-2017.07 (NRF of Korea, grant No. 2014R1A1A3049826)
Investigation on the magnetic modulation of magnetic oxides through resistance switching oxides
2012.05~2015.04 (NRF of Korea, grant No. 2012R1A1A3009736)
Study on diluted magnetic oxide semiconductors with room temperature ferromagnetism
through defect engineering
2013.07 ~ 2015.06 (NRF of Korea, grant No. 2013K2A2A2000644)
Metal-Ge contact modulation using resistance switching oxide interfacial layer
2016.07 ~ 2018.06 (NRF of Korea, grant No. 2016K2A9A2A06004723)
Oxide-based Spintronic Memristive Devices Modulated by Electric Field and Magnetic Field
Highlights of recent publications
Z‑scheme SnFe2O4/α-Fe2O3 micro-octahedron with intimated interface for photocatalytic CO2 reduction
Yuefa Jia, Chunli Liu, et al.
• The micro-octahedrons SnFe2O4/α-Fe2O3 heterostructure was fabricated by an in-situ reaction.
• The heterostructure significantly enhanced the photoreduction of CO2.
• The intimate contact was found between SnFe2O4 and α-Fe2O3.
• Z-scheme charge transfer and close contact interface are supposed to explain the excellent performance of the heterojunction.
Effect of internal field on the high resistance state retention of unipolar resistance switching in ferroelectric vanadium doped ZnO
Changjin Wu, ChunliLiu Appl. Phys. Lett. 14, 110 (2017)
Our result suggested that the internal field can reduce the activation energy of the redox process for generating oxygen vacancies, which subsequently affect the formation of conducting filament in the resistance switching process.
App. Catalysis B: Environmental (2019)
Highly efficient (BiO)2CO3-BiO2-x-graphene photocatalysts: Z-Scheme photocatalytic mechanism for their enhanced photocatalytic removal of NO.
App. Surface Science (2019) 854-862
Au nanoparticles enhanced Z-scheme Au-CoFe2O4/MoS2 visible light photocatalyst with magnetic retrievability.
Materials Letters (2019) 281-285
Hydrothermal synthesis of BiO2−x–(BiO)2CO3 composite and their photocatalytic performance with visible light radiation.
