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Highly enhanced and stable activity of defect-induced titania nanoparticles for solar light-driven CO2 reduction into CH4

Title
Highly enhanced and stable activity of defect-induced titania nanoparticles for solar light-driven CO2 reduction into CH4
Authors
Sorcar, SauravHwang, Yun JuGrimes, Craig A.In, Su Il
DGIST Authors
In, Su Il
Issue Date
2017-11
Citation
Materials Today, 20(9), 507-515
Type
Article
Article Type
Article
Keywords
EXPOSED 001 FACETSPHOTOCATALYTIC REDUCTIONPHOTOREDUCTION EFFICIENCYHYDROGEN-PRODUCTIONCARBON-DIOXIDEDOPED TIO2IRRADIATIONCONVERSIONMETHANEH2O
ISSN
1369-7021
Abstract
Photocatalytic reduction of CO2 to fuel offers an exciting opportunity for helping to solve current energy and global warming problems. Although a number of solar active catalysts have been reported, most of them suffer from low product yield, instability, and low quantum efficiency. Therefore, the design and fabrication of highly active photocatalysts remains an unmet challenge. In the current work we utilize hydrogen-doped, blue-colored reduced titania for photocatalytic conversion of CO2 into methane (CH4). The photocatalyst is obtained by exposure of TiO2 to NaBH4 at 350 degrees C for 0.5 h. Sensitized with Pt nanoparticles, the material promotes solar spectrum photoconversion of CO2 to CH4 with an apparent quantum yield of 12.40% and a time normalized CH4 generation rate of 80.35 lmol g(-1) h(-1), which to the best of our knowledge is a record for photocatalytic-based CO2 reduction. The material appears intrinsically stable, with no loss in sample performance over five 6 h cycles, with the sample heated in vacuum after each cycle. © 2017 Elsevier Ltd. All rights reserved.
URI
http://hdl.handle.net/20.500.11750/5639
DOI
10.1016/j.mattod.2017.09.005
Publisher
ELSEVIER SCI LTD
Related Researcher
  • Author In, Su Il Green and Renewable Energy for Endless Nature(GREEN) Lab
  • 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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Collection:
Energy Science and EngineeringGreen and Renewable Energy for Endless Nature(GREEN) Lab1. Journal Articles


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