DOI: 10.1016/j.scib.2020.05.024
论文题名: Nature-inspired CaCO3 loading TiO2 composites for efficient and durable photocatalytic mineralization of gaseous toluene
作者: Cui W. ; Li J. ; Chen L. ; Dong X. ; Wang H. ; Sheng J. ; Sun Y. ; Zhou Y. ; Dong F.
刊名: Science Bulletin
ISSN: 20959273
出版年: 2020
卷: 65, 期: 19 起始页码: 1626
结束页码: 1634
语种: 英语
中文关键词: Immobilization
; Photocatalysis
; Reaction mechanism
; Toluene
; VOCs decomposition
英文关键词: Biomimetics
; Calcite
; Calcium carbonate
; Carbon dioxide
; Environmental technology
; Oxide minerals
; Toluene
; Volatile organic compounds
; Environmental remediation
; Flexible supports
; Gaseous toluene
; Natural formations
; Photo-catalytic
; Photocatalytic mineralizations
; Photogenerated carriers
; Specific activity
; Titanium dioxide
英文摘要: The accumulation of intermediates or final products on TiO2 during photocatalytic volatile organic compounds (VOCs) degradation is typically neglected, despite the fact that it could result in the block of active sites and the deactivation of photocatalysts. Inspired from the natural formation of stalactite (CaCO3 + H2O + CO2 ↔ Ca(HCO3)2), we fabricated CaCO3 loading TiO2 composites (CCT21) to realize the spontaneously transfer of accumulated final products (CO2 and H2O). Efficient and durable performance for gaseous toluene removal has been demonstrated and the cost of photocatalyst is greatly reduced by the comparison of specific activity. The introduction of CaCO3 induces the interaction between TiO2 and CaCO3 to stimulate abundant activated electrons for the improvement on the adsorption and activation of reactants and the transformation of photogenerated carriers, and most importantly, facilitates the transfer of final products to release active sites and thus suppress the deactivation of TiO2. Furthermore, we develop a facile method to immobilize CCT21 powder on flexible support, which greatly reduces the loss of photocatalysts and correspondingly enables the practical application of TiO2-based products. Therefore, this work presents a novel nature-inspired strategy to address the challenge of deactivation, and advances the development of photocatalytic technology for environmental remediation. © 2020 Science China Press Citation statistics:
资源类型: 期刊论文
标识符: http://119.78.100.158/handle/2HF3EXSE/169873
Appears in Collections: 气候变化与战略
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作者单位: The Center of New Energy Materials and Technology, School of New Energy and Materials, Southwest Petroleum University, Chengdu, 610500, China; Research Center for Environmental and Energy Catalysis, Institute of Fundamental and Frontier Sciences, University of Electronic Science and Technology of China, Chengdu, 611731, China; School of Resources and Environment, University of Electronic Science and Technology of China, Chengdu, 611731, China
Recommended Citation:
Cui W.,Li J.,Chen L.,et al. Nature-inspired CaCO3 loading TiO2 composites for efficient and durable photocatalytic mineralization of gaseous toluene[J]. Science Bulletin,2020-01-01,65(19)