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Heterojunction p-n-p Cu2O/S-TiO2/CuO: Synthesis and application to photocatalytic conversion of CO2 to methane
- Heterojunction p-n-p Cu2O/S-TiO2/CuO: Synthesis and application to photocatalytic conversion of CO2 to methane
- Kim, Hye Rim; Razzaq, Abdul; Grimes, Craig A.; In, Su-Il
- DGIST Authors
- Kim, Hye Rim; Razzaq, Abdul; In, Su-Il
- Issue Date
- Journal of CO2 Utilization, 20
- Article Type
- Annealing Process; Architecture; Carbon Dioxide; Co2 Conversion; Copper Oxide; Copper Oxides; Electromagnetic Wave Absorption; Heterojunctions; Light Absorption; Material Architecture; Methane; N P Junctions; Nanotube Arrays; Nanotubes; P N P Junction; Photo Catalytic; Photo Catalytic Materials; Photogenerated Charge; S Doped Tio; S Doped Tio2; Titanium Dioxide; Yarn
- Graphical abstract: Photocatalytic conversion of CO2 to fuel is a topic of great current interest. The problem is a challenging one, requiring a photocorrosion-stable, industrially-scalable, broad-spectrum light absorbing semiconductor, the energy bands of which align with the CO/CO2 and H2O/O2 potentials. Herein we report the synthesis of a unique p-n-p heterojunction material architecture, Cu2O/S-doped TiO2 micro-blocks covered with CuO nanowires, using anodization and annealing processes. The photocatalytic material shows excellent performance in the photocatalytic conversion of CO2 and water vapor to methane under AM 1.5G illumination. The heterojunction material architecture exhibits a methane yield of 2.31μmolm−2h−1, a rate approximately ten times higher than TiO2 nanotube array films synthesized using similar anodization conditions. The improved performance of the heterojunctioned material architecture appears due to improved light absorption and efficient separation of the photogenerated charge. © 2017 Elsevier Ltd.
- Elsevier Ltd
- Related Researcher
Green and Renewable Energy for Endless Nature(GREEN) Lab
CO2 conversion to hydrocarbon fuels; Water splitting for hydrogen generation; Quantum dot devices; Dye sensitized solar cells; Environmental remediation; Synthesis of functional nanomaterials; CO2 연료전환; 수소생산을 위한 광전기화학적 물분해; 양자점 태양전지; 염료감응 태양전지; 공해물질 저감연구; 기능성 나노소재 개발
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- Department of Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles
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