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Cu2ZnSnS4 (CZTS)-ZnO: A noble metal-free hybrid Z-scheme photocatalyst for enhanced solar-spectrum photocatalytic conversion of CO2 to CH4

Cu2ZnSnS4 (CZTS)-ZnO: A noble metal-free hybrid Z-scheme photocatalyst for enhanced solar-spectrum photocatalytic conversion of CO2 to CH4
Zubair, MuhammadRazzaq, AbdulGrimes, Craig A.In, Su-Il
DGIST Authors
In, Su-Il
Issued Date
Article Type
Carbon DioxideCo2 ConversionCost EffectivenessElectromagnetic Wave AbsorptionElectronic PropertiesHeterojunction InterfacesHeterojunctionsHybrid PhotocatalystHybrid PhotocatalystsLight AbsorptionNanoparticlesNanorodsOptical and Electronic PropertiesPhoto Catalytic MaterialsPhoto Catalytic PerformancePrecious MetalsSimulated Solar LightSolar RadiationSolar SpectrumSolar Spectrum ActiveZ SchemeZinc Oxide (ZnO)
Development of photocatalytic materials for achieving the aspects of cost-effectiveness, improved performance and high stability is a subject of enormous interest among the photocatalysis research society. With the aim of achieving above mentioned features, herein we report a noble metal free, solar-light active, efficient and highly stable hybrid Cu2ZnSnS4 (CZTS)-ZnO photocatalyst, synthesized by a simple two-step process. The morphological, crystalline, band alignment, optical and electronic properties of the prepared samples are intensively investigated. Photocatalytic performance is evaluated by measuring, under the simulated solar light, the ability of the photocatalyst to convert CO2 into hydrocarbon fuels, primarily CH4. Our optimum CZTS-ZnO photocatalyst sample exhibits a CH4 yield of 138.90 ppm g-1 h-1, a factor of ≈ 31 times greater than the un-sensitized ZnO nanorods, and ≈ 22 times greater than the CZTS nanoparticles; with excellent stability yielding similar CH4 production up to five test-cycles. The enhanced performance of the hybrid, noble metal-free photocatalyst can be attributed to improved light absorption and efficient separation of the photogenerated charge due to the Z-scheme heterojunction interface. © 2017 Elsevier Ltd. All rights reserved.
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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