Synthesis of lanthanum oxide doped photocatalytic nano titanium oxide through aqueous sol–gel method for titania multifunctional ultrafiltration membrane

Manjumol, K. A.; Smitha, Venu Sreekala; Shajesh, P.; Baiju, K. V.; Warrier, K. G. K.

doi:10.1007/s10971-009-2101-4

Cited by 15 publications

(7 citation statements)

References 22 publications

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“…where F(R) is the mass fraction of rutile in the sample and I A(101) and I R(110) are the integrated main peak intensities of anatase and rutile, respectively. 20 The BET (Brunauer, Emmett and Teller) surface area measurements and pore size analysis were carried out by nitrogen adsorption using a Micromeritics Gemini 2375 surface area analyzer after degassing each sample at 200 °C for 2 hours. The photocatalytic activity of the nanocomposites was studied by monitoring the degradation of methylene blue (MB) (AR Grade, Qualigens Fine Chemicals, India) dye in an aqueous suspension under UV-A exposure and continuous stirring using a magnetic stirrer.…”

Section: Methodsmentioning

confidence: 99%

Novel multifunctional titania–silica–lanthanum phosphate nanocomposite coatings through an all aqueous sol–gel process

Smitha

Jyothi

et al. 2013

Dalton Trans.

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A novel nanocomposite coating containing titania, silica and lanthanum phosphate prepared through an all aqueous sol-gel route exhibits excellent self-cleaning ability arising from the synergistic effect of the constituents in the nanocomposite. A highly stable titania-silica-lanthanum phosphate nanocomposite sol having particle size in the range of 30-50 nm has been synthesized starting from a titanyl sulphate precursor, which was further used for the development of photocatalytically active composite coatings on glass. The coatings prepared by the dip coating technique as well as the nanocomposite powders are heat treated and characterized further for their morphology and multifunctionality. The nanocomposite containing 1.5 wt% LaPO4 has shown a surface area as high as 138 m(2) g(-1) and a methylene blue degradation efficiency of 94% in two hours of UV exposure. The composite coating has shown very good homogeneity evidenced by transparency as high as 99.5% and low wetting behaviour. The present novel approach for energy conserving, aqueous derived, self-cleaning coatings may be suitable for large scale industrial applications.

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Section: Methodsmentioning

confidence: 99%

Novel multifunctional titania–silica–lanthanum phosphate nanocomposite coatings through an all aqueous sol–gel process

Smitha

Jyothi

et al. 2013

Dalton Trans.

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“…There have been several reports examining photocatalytic ceramic membranes, however, the examined membranes work primarily in the UV region and have undesirable UF performance. [17][18][19] For titania membranes, the crystal phase and structure are the determining factors for the photocatalytic activity. [20][21][22] The anatase phase is known to be the more photo-active phase but is metastable and irreversibly transforms into the thermally stable rutile phase in the temperature range of 500-600 C. [22][23][24] Such a phase transformation during membrane calcination induces collapse of the mesoporous structure and rapid growth of particle size leading to the decreases of surface area, membrane porosity and pore size uniformity.…”

Section: Introductionmentioning

confidence: 99%

Synthesis of visible-light responsive C, N and Ce co-doped TiO2 mesoporous membranes via weak alkaline sol–gel process

Cao

Jing

et al. 2012

J. Mater. Chem.

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A visible-light responsive C, N and Ce co-doped TiO 2 mesoporous membrane has been synthesized via a weakly alkaline sol-gel route using P123 template. The co-doping of C, N and Ce resulted in a lowered band gap of 2.14 eV which improved the photocatalytic activity in visible light. The Ce-dopant was found to strengthen the Ti-O bond that stabilized the anatase phase as well as the assembled interconnected mesoporous structure during high temperature calcination. The stabilization of the crystal phase and pore structure resulted in a higher surface area, smaller and more uniform pore size in the membrane. The membrane exhibited a low cut-off molecular weight of 3300 Da and a water flux of 4.05 L m À2 h À1 per bar.

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“…A lower crystallite size is expected to provide better photocatalytic activity. 41 Despite the lower crystallite size, the photocatalytic activity of the TS-CB-5 coating was lower compared to that of the TS-B-2 coating. The TS-CB-5 composite contains a relatively lower amount of titania when compared with TS-B-2, which could be the reason for the lower photoactivity obtained.…”

Section: Powder Characterizationmentioning

confidence: 96%

Effect of precursor particle size distribution on the morphology and low wetting behavior of photocatalytic nanocoatings on glass surfaces

et al. 2013

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Synthesis of lanthanum oxide doped photocatalytic nano titanium oxide through aqueous sol–gel method for titania multifunctional ultrafiltration membrane

Cited by 15 publications

References 22 publications

Novel multifunctional titania–silica–lanthanum phosphate nanocomposite coatings through an all aqueous sol–gel process

Novel multifunctional titania–silica–lanthanum phosphate nanocomposite coatings through an all aqueous sol–gel process

Synthesis of visible-light responsive C, N and Ce co-doped TiO2 mesoporous membranes via weak alkaline sol–gel process

Effect of precursor particle size distribution on the morphology and low wetting behavior of photocatalytic nanocoatings on glass surfaces

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