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Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures: controlled hydrothermal crystal growth and enhanced photocatalytic performance for water purification
Wang, Qiang; Fan, Chenming; Li, Guomin; Luo, Jiangshui; Li, Bing
2019-12-21
Source PublicationCATALYSIS SCIENCE & TECHNOLOGY
ISSN2044-4753
Volume9Issue:24Pages:7023
SubtypeArticle
AbstractSemiconductor photocatalysis towards pollutant degradation driven by solar energy is regarded as a promising technology to solve global energy and environmental problems. In this work, three-dimensional (3D) TiO2 microflowers (MFs) were hybridized with one-dimensional (1D) K2Ti6O13 nanobelts (NBs) to construct novel hierarchical Ti-O-based micro-nano heteroarchitectures (HAs) using a controlled hydrothermal route. The well-developed TiO2 MFs were featured with their petals consisting of several 1D nanostructures with the width of around 100-200 nm. Particularly, the crystal growth mechanism of the unique 1D/3D K2Ti6O13/TiO2 HAs was proposed based on the time-dependent experiments combined with structural and morphological characterizations. Unexpectedly, the optimized K2Ti6O13/TiO2 composites exhibited much higher photocatalytic performance for the degradation of organic dyes and antibiotics under simulated sunlight irradiation, which was more than 2-folds higher than that of single K2Ti6O13 and TiO2 catalysts. Moreover, the photocatalytic activity of K2Ti6O13/TiO2 composites for dye degradation was higher than that of commercial P25 under visible light irradiation (lambda > 400 nm). Apart from the advantages of hierarchical micro-nano HAs in improving light adsorption and surface area, the enhanced photocatalytic properties could be particularly attributed to the formation of K2Ti6O13/TiO2 heterojunctions that offered available interfacial channels for charge transfer and separation, as proved by the photoluminescence and photoelectrochemical measurements. Furthermore, good stability and long-term durability of the composite photocatalysts were also determined by cycling tests, mainly resulting from the tightly combined K2Ti6O13/TiO2 heterostructures. This work can be extended to design other hierarchical TiO2-based micro-nano hybrids with superior photocatalytic properties for environmental purification and solar energy conversion.
DOI10.1039/c9cy01833f
WOS KeywordLIGHT-ACTIVE PHOTOCATALYSTS ; POTASSIUM TITANATE ; TIO2 NANOPARTICLES ; RUTILE TIO2 ; RHODAMINE-B ; DEGRADATION ; FABRICATION ; PHOTODEGRADATION ; HETEROSTRUCTURES ; HETEROJUNCTION
Language英语
WOS Research AreaChemistry
PublisherROYAL SOC CHEMISTRY
Citation statistics
Cited Times:6[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Identifierhttp://ir.sic.ac.cn/handle/331005/27441
Collection中国科学院上海硅酸盐研究所
Recommended Citation
GB/T 7714
Wang, Qiang,Fan, Chenming,Li, Guomin,et al. Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures: controlled hydrothermal crystal growth and enhanced photocatalytic performance for water purification[J]. CATALYSIS SCIENCE & TECHNOLOGY,2019,9(24):7023.
APA Wang, Qiang,Fan, Chenming,Li, Guomin,Luo, Jiangshui,&Li, Bing.(2019).Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures: controlled hydrothermal crystal growth and enhanced photocatalytic performance for water purification.CATALYSIS SCIENCE & TECHNOLOGY,9(24),7023.
MLA Wang, Qiang,et al."Unique 1D/3D K2Ti6O13/TiO2 micro-nano heteroarchitectures: controlled hydrothermal crystal growth and enhanced photocatalytic performance for water purification".CATALYSIS SCIENCE & TECHNOLOGY 9.24(2019):7023.
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