Synthesis of hierarchical Au/TiO2 plasmonic nanocomposite for enhancement of photocatalytic reduction of CO2 to CO
The increasing worldwide consumption of fossil fuels has accelerated the global energy consumption rate and led to overproduction of the carbon dioxide,resulting in global climate change and energy crisis.Semiconductor-based photocatalytic reduction of CO2 with H2O to renewable hydrocarbon fuels by solar energy has attracted enormously attention in recent years.Among the semiconductor photocatalysts,Titanium dioxide(TiO2)has been extensively used in the photocatalytic fields including water splitting,degradation of organic contaminants,and CO2 reduction due to its cheap,non-toxic,and light stability.Herein,High specific surface area three-dimensional pine tree-like hierarchical TiO2 nanotube array films loaded with Au nanoparticles were successfully prepared by one-step hydrothermal reaction combining with simple and feasible thermal evaporation system.These photocatalysts were characterized by scanning electron microscopy(SEM),X-ray diffraction(XRD),the elemental chemical status and compositions were analyzed with X-ray photoelectron spectroscopy(XPS).The result of the photo-reduction of CO2 shows that the composite Au/TiO2-branched nanotube arrays shows efficiently reduce CO2 to CO under UV visible light irradiation,which is about 2.4 times higher than that of pure TiO2 nanotube arrays.The Au/TiO2 nanocomposite photocatalyst is stable with the prolonged time and reaction duration.The enhancement of photocatalytic reduction of CO2 is attributed to the boost of plasmonic effect enhancement carrier generation and separation,higher specific surface area,faster charge transport,and superior light-harvesting efficiency for efficient charge collection.The work provides a cost-effective,flexible and clean method to develop high-performance photocatalytic reduction of CO2 to renewable hydrocarbon fuels by solar energy.
TiO2 nanotube array Au nanoparticles plasmonic CO2 reduction
Jinxia XU Liming WU Huihu WANG Fei MEI Yuanming ZHOU Lingyun LIU
Hubei Collaborative Innovation Center for High-efficiency Utilization of Solar Energy,Hubei University of Technology,Wuhan 430068,P.R.China;Hubei Key Laboratory for High-efficiency Utilization of Solar Energy and Operation Control of Energy Storage System,Hubei University of Technology,Wuhan,430068,P.R.China;Hubei Power Grid Intelligent Control and Equipment Engineering Technology Research Center,Hubei University of Technology,Wuhan,430068,P.R.China
国际会议
武汉
英文
69-75
2018-08-21（万方平台首次上网日期，不代表论文的发表时间）