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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 RimRazzaq, AbdulGrimes, Craig A.In, Su-Il
DGIST Authors
Kim, Hye RimRazzaq, AbdulIn, Su-Il
Issued Date
Article Type
Annealing ProcessArchitectureCarbon DioxideCo2 ConversionCopper OxideCopper OxidesElectromagnetic Wave AbsorptionHeterojunctionsLight AbsorptionMaterial ArchitectureMethaneN P JunctionsNanotube ArraysNanotubesP N P JunctionPhoto CatalyticPhoto Catalytic MaterialsPhotogenerated ChargeS Doped TioS Doped Tio2Titanium DioxideYarn
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
  • 인수일 In, Su-Il 에너지공학과
  • Research Interests 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 Engineering Green and Renewable Energy for Endless Nature(GREEN) Lab 1. Journal Articles


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