Influence of ZrO2 addition on microstructure and liquid permeability of mesoporous TiO2 membranes

Sekulic, Jelena; Magrasó, Anna; Elshof, Johan E. ten; Blank, Dave H.A.

doi:10.1016/j.micromeso.2004.04.017

Cited by 44 publications

(26 citation statements)

References 27 publications

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“…11b . This indicates that the pressure difference is the only driving force for permeation (Sekulie et al, 2004). For transport driven only by convection, the volume flow rate is proportional to the pressure difference, following the Darcy law.…”

Section: Pore Characterization Of Supports Prepared By Centrifugationmentioning

confidence: 98%

Fabrication of Tubular Membrane Supports from Low Price Raw Materials, Using Both Centrifugal Casting and/or Extrusion Methods

Harabi¹,

Bouzerara²

2011

Expanding Issues in Desalination

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Section: Pore Characterization Of Supports Prepared By Centrifugationmentioning

confidence: 98%

Fabrication of Tubular Membrane Supports from Low Price Raw Materials, Using Both Centrifugal Casting and/or Extrusion Methods

Harabi¹,

Bouzerara²

2011

Expanding Issues in Desalination

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“…The pore structures in these materials are usually complex and tend to be made up by interconnected networks of pores of different size and shape, being the H2 hysteresis loop characteristic for mesoporous materials consisting of spherical particles, with a relative wide pore size distribution and a pore shape that is often described as "ink bottle"-type [44]. A microporosity contribution was found for all TiO 2 xerogels.…”

Section: Characterization Studiesmentioning

confidence: 99%

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Mendoza

Valle

Castellote

et al. 2015

Applied Catalysis B: Environmental

100

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a b s t r a c tAn increasingly known application of nanomaterials in the construction industry is related to the photoactivity ability of semiconductors, where nano-anatase TiO 2 is perhaps the most well-known photocatalytic semiconductor and one which possesses a strong oxidizing capability. To analyze the photo-efficiency of four TiO 2 coatings and the effect of SiO 2 interlayer on the mechanic and photocatalytic activity in Rhodamine B (RhB) and NO x photodegradation, two photocatalytic cement series have been prepared. First, cement mortar was coated with three commercial TiO 2 suspensions (GG1, GC7 and CG13) and a home-made titania sol-gel (TEA), and secondly an insertion of a SiO 2 layer was applied on cement surface before spraying the TiO 2 layer.All studied TiO 2 -cements exhibited a significant RhB and NO x photodegradation, arising almost total RhB molar conversions, and upper 53% for NO x photo-oxidation respectively. Nevertheless, although SiO 2 layer deposited in between mortar and TiO 2 -cement did not stabilize the commercial TiO 2 coatings, a good adhesion was observed when silica was applied joint to the home-made titania gel (TEA), probably as a consequence of the interactions encountered between SiO 2 and TiO 2 gels. CG7-Si-Cem exhibited high rate at shorter irradiation times, but TEA-Cem and TEA-Si-Cem can be considered as very interesting and potential photocatalytic mortars due to useful mechanical properties, with a very good coatings adhesion that provides promising outdoor use, and good photo-efficiencies in RhB and NO x photo-oxidation.

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“…The microporous layer is 20-300 nm thick. The mesoporous substrate on which this layer rests consists of a c-Al 2 O 3 [7,19,20], anatase [21] or other mesoporous layer and has pore sizes of 3-10 nm. Since permselective silica membranes are very resistive to molecular transport, its thickness should be kept as low as possible to maximize the flux under a given concentration gradient.…”

Section: Introductionmentioning

confidence: 99%

Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

Elshof

Dral

2015

J Sol-Gel Sci Technol

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Supported microporous organosilica membranes made from bridged silsesquioxane precursors by an acid-catalyzed sol-gel process have demonstrated a remarkable hydrothermal stability in pervaporation and gas separation processes, making them the first generation of ceramic molecular sieving membranes with sufficient performance under industrially relevant conditions. The commercial availability of various a,x-bis(trialkoxysilyl)alkane and 1,4-bis(trialkoxysilyl)benzene precursors facilitates the tailoring of membrane properties like pore size and surface chemistry via the choice of precursor(s) and process variables. Here, we describe the engineering of sols for making supported microporous thin films, discuss the thermal and hydrothermal stability of microporous organosilicas and give a short overview of the developments and applications of these membranes in liquid and gas separation processes since their first report in 2008.Graphical Abstract

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Influence of ZrO2 addition on microstructure and liquid permeability of mesoporous TiO2 membranes

Cited by 44 publications

References 27 publications

Fabrication of Tubular Membrane Supports from Low Price Raw Materials, Using Both Centrifugal Casting and/or Extrusion Methods

Fabrication of Tubular Membrane Supports from Low Price Raw Materials, Using Both Centrifugal Casting and/or Extrusion Methods

TiO2 and TiO2–SiO2 coated cement: Comparison of mechanic and photocatalytic properties

Structure–property tuning in hydrothermally stable sol–gel-processed hybrid organosilica molecular sieving membranes

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