DOI: 10.1016/j.jcou.2018.07.014
Scopus记录号: 2-s2.0-85051114620
论文题名: Photoelectrocatalytic characterization of carbon-doped NaTaO3 applied in the photoreduction of CO2 towards the formaldehyde production
作者: Mora-Hernandez J.M. ; Huerta-Flores A.M. ; Torres-Martínez L.M.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2018
卷: 27 起始页码: 179
结束页码: 187
语种: 英语
英文关键词: Carbon-doped perovskites
; CO2 photoreduction
; Solar-based fuels
Scopus关键词: Annealing
; Carbon
; Carbon dioxide
; Energy gap
; Formaldehyde
; Perovskite
; Photocatalysis
; Tantalum compounds
; Electrical conductivity
; Formaldehyde production
; Photo-reduction
; Photocatalytic activities
; Photocatalytic reduction
; Photoelectrocatalytic
; Photoelectrochemicals
; Physical and chemical properties
; Sodium compounds
英文摘要: A carbon-doped NaTaO3 perovskite (NaTaO3-C) was synthesized by the chemical solvo-combustion method. The as-prepared material NaTaO3-C was annealed at temperatures of 500, 550, 600, 650, and 700 °C in an air atmosphere, in order to study the crystalline phases present in these samples, and to relate the morphological, physical and chemical properties of the carbon-doped perovskites to the photocatalytic activity to perform the CO2 reduction in aqueous medium. The formation of a composite between the carbon and the perovskite, and the presence of a second phase, Na2Ta4O11, was confirmed through XRD measurements. While it is true that both formations improved the photocatalytic activity of the NaTaO3-C, an optimal carbon amount is a key parameter to reduce the band gap value and diminish the charge transference resistance by an improvement in the electrical conductivity of the sample. It is worth to mention that the optimal ratio between the surface area and crystallinity of the sample was achieved by the NaTaO3-C annealed al 650 °C. These parameters play an important role to explain an improved photocatalytic activity caused by a higher reactive surface and lower recombination of the charges photogenerated onto larger crystals. The photoelectrochemical tests revealed that the material annealed a 650 °C is the only sample with a conduction band value more negative than the potential required to perform the generation of formaldehyde from the photocatalytic reduction of CO2. The photocatalytic activity was evaluated in neutral aqueous medium, NaTaO3-C 650 °C presented the highest formaldehyde production (39 μmol g-1). © 2018 Published by Elsevier Ltd. Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/111798
Appears in Collections: 气候减缓与适应
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作者单位: CONACYT, Universidad Autónoma de Nuevo León, UANL, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66455, Mexico; Universidad Autónoma de Nuevo León, UANL, Facultad de Ingeniería Civil, Departamento de Ecomateriales y Energía, Av. Universidad S/N Ciudad Universitaria, San Nicolás de los Garza, Nuevo León, C.P. 66455, Mexico
Recommended Citation:
Mora-Hernandez J.M.,Huerta-Flores A.M.,Torres-Martínez L.M.. Photoelectrocatalytic characterization of carbon-doped NaTaO3 applied in the photoreduction of CO2 towards the formaldehyde production[J]. Journal of CO2 Utilization,2018-01-01,27