DOI: 10.1016/j.jcou.2016.04.004
Scopus记录号: 2-s2.0-84963938771
论文题名: CO2 photoreduction with water vapor by Ti-embedded MgAl layered double hydroxides
作者: Zhao H. ; Xu J. ; Liu L. ; Rao G. ; Zhao C. ; Li Y.
刊名: Journal of CO2 Utilization
ISSN: 22129820
出版年: 2016
卷: 15 语种: 英语
英文关键词: CO2 photoreduction
; Crystallinity
; Layered double hydroxides (LDHs)
; Photocatalyst
; TiO2
Scopus关键词: Catalyst activity
; Coprecipitation
; Gas emissions
; Greenhouse gases
; Hydrothermal synthesis
; Photocatalysts
; Solar energy
; Specific surface area
; Titanium dioxide
; Coprecipitation method
; Crystallinities
; Hydrothermally treated
; Layered double hydroxides
; Magnesium-aluminum layered double hydroxides
; Mg-Al layered double hydroxide
; Photo-reduction
; Photocatalytic reduction of co
; Carbon dioxide
英文摘要: Graphical abstract: Photocatalytic reduction of CO2 into value-added fuels (e.g., CO and CH4) is a promising approach of storing solar energy and mitigating greenhouse gas emissions simultaneously. In this work, a novel material of crystallized titanium-embedded magnesium-aluminum layered double hydroxides (MgAlTi-LDHs) is developed and tested for CO2 photoreduction with water. Three different materials synthesis methods were explored: (1) coprecipitation, (2) coprecipitation+hydrothermal, and (3) coprecipitation+calcination+reconstruction. The coprecipitation method alone only produced amorphous TiOx species in the LDHs, while the latter two methods resulted in the formation of crystalline anatase TiO2 when appropriate treatment temperatures were applied but the specific surface area was decreased due to the thermal treatment. Compared with commercial TiO2-P25 nanoparticles, all MgAlTi-LDHs prepared in this work demonstrated two to four times higher catalytic activities in CO2 photoreduction to CO. Among the MgAlTi-LDHs, the CO2 photoreduction activity was affected by both the crystallinity of TiO2 and the specific surface area. Consequently, the material hydrothermally treated at 150-200°C demonstrated the highest CO production due to a well-balanced TiO2 crystallinity and specific surface area. Findings in this work contribute to the development of efficient photocatalysts for CO2 reduction and advance the understanding of the catalyst property-activity relationships. © 2016 Elsevier Ltd. 资助项目: National Science Foundation
; National Science Foundation
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资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/52889
Appears in Collections: 影响、适应和脆弱性
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Recommended Citation:
Zhao H.,Xu J.,Liu L.,et al. CO2 photoreduction with water vapor by Ti-embedded MgAl layered double hydroxides[J]. Journal of CO2 Utilization,2016-01-01,15