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Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating
Alternative TitleLangmuir
Li, Xiaodong1; Sun, Guanqing1; Li, Yecheng1; Yu, Jimmy C.1; Wu, Jie2; Ma, Guang-Hui2; Ngai, To1
2014-03-18
Source PublicationLANGMUIR
ISSN0743-7463
Volume30Issue:10Pages:2676-2683
AbstractWe report a facile method for preparing porous structured TiO2 materials by templating from Pickering high-internal phase emulsions (HIPEs). A Pickering HIPE with an internal phase of up to 80 vol %, stabilized by poly(N-isopropylacrylamide)-based microgels and TiO2 solid nanoparticles, was first formulated and employed as a template to prepare the porous TiO2 materials with an interconnected structure. The resultant materials were characterized by scanning electron microscopy, X-ray diffraction, and mercury intrusion. Our results showed that the parent emulsion droplets promoted the formation of macropores and interconnecting throats with sizes of similar to 50 and similar to 10 mu m, respectively, while the interfacially adsorbed microgel stabilizers drove the formation of smaller pores (similar to 100 nm) throughout the macroporous walls after drying and sintering. The interconnected structured network with the bimodal pores could be well preserved after calcinations at 800 degrees C. In addition, the photocatalytic activity of the fabricated TiO2 was evaluated by measuring the photodegradation of Rhodamine B in water. Our results revealed that the fabricated TiO2 materials are good photocatalysts, showing enhanced activity and stability in photodegrading organic molecules.; We report a facile method for preparing porous structured TiO2 materials by templating from Pickering high-internal phase emulsions (HIPEs). A Pickering HIPE with an internal phase of up to 80 vol %, stabilized by poly(N-isopropylacrylamide)-based microgels and TiO2 solid nanoparticles, was first formulated and employed as a template to prepare the porous TiO2 materials with an interconnected structure. The resultant materials were characterized by scanning electron microscopy, X-ray diffraction, and mercury intrusion. Our results showed that the parent emulsion droplets promoted the formation of macropores and interconnecting throats with sizes of similar to 50 and similar to 10 mu m, respectively, while the interfacially adsorbed microgel stabilizers drove the formation of smaller pores (similar to 100 nm) throughout the macroporous walls after drying and sintering. The interconnected structured network with the bimodal pores could be well preserved after calcinations at 800 degrees C. In addition, the photocatalytic activity of the fabricated TiO2 was evaluated by measuring the photodegradation of Rhodamine B in water. Our results revealed that the fabricated TiO2 materials are good photocatalysts, showing enhanced activity and stability in photodegrading organic molecules.
KeywordPhotocatalytic Activity Synthesis Parameters Mesoporous Silica Polymer Scaffolds Surface-area Particles Titania Foams Fabrication Morphology
SubtypeArticle
WOS HeadingsScience & Technology ; Physical Sciences ; Technology
DOI10.1021/la404930h
URL查看原文
Indexed BySCI
Language英语
WOS KeywordPHOTOCATALYTIC ACTIVITY ; SYNTHESIS PARAMETERS ; MESOPOROUS SILICA ; POLYMER SCAFFOLDS ; SURFACE-AREA ; PARTICLES ; TITANIA ; FOAMS ; FABRICATION ; MORPHOLOGY
WOS Research AreaChemistry ; Materials Science
WOS SubjectChemistry, Multidisciplinary ; Chemistry, Physical ; Materials Science, Multidisciplinary
WOS IDWOS:000333235500011
Citation statistics
Cited Times:52[WOS]   [WOS Record]     [Related Records in WOS]
Document Type期刊论文
Version出版稿
Identifierhttp://ir.ipe.ac.cn/handle/122111/8168
Collection研究所(批量导入)
Affiliation1.Chinese Univ Hong Kong, Dept Chem, Shatin, Hong Kong, Peoples R China
2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China
Recommended Citation
GB/T 7714
Li, Xiaodong,Sun, Guanqing,Li, Yecheng,et al. Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating[J]. LANGMUIR,2014,30(10):2676-2683.
APA Li, Xiaodong.,Sun, Guanqing.,Li, Yecheng.,Yu, Jimmy C..,Wu, Jie.,...&Ngai, To.(2014).Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating.LANGMUIR,30(10),2676-2683.
MLA Li, Xiaodong,et al."Porous TiO2 Materials through Pickering High-Internal Phase Emulsion Templating".LANGMUIR 30.10(2014):2676-2683.
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