Photocatalytic Activity of Microwave Plasma-Synthesized TiO2 Nanopowder

Kumar, S. Mahendra; Deshpande, Parag A.; Krishna, M.; Krupashankara, M.S.; Madras, Giridhar

doi:10.1007/s11090-010-9235-6

Cited by 6 publications

(4 citation statements)

References 26 publications

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“…The more intense peak at 2θ = 25.3° corresponds to the (101) plane of anatase, whereas the peaks at 37.8°, 48°, 54°, and 63° correspond to (103), (200), (105), and (213) planes of this phase . There is also a small reflection from the (110) plane of rutile at 2θ = 28° . In the platinum impregnated samples treated in plasma, reflexions from platinum (typically at 2θ = 39.8° and 46.2°) are not present .…”

Section: Resultsmentioning

confidence: 98%

“…55 There is also a small reflexion from the (110) plane of rutile at 2 = 28º. 56 In the platinum impregnated samples treated in plasma, reflexions from platinum Supporting information Table 1) shows the presence of Ti and O and also a considerable amount of C that may come from the precursor used in its preparation. [60][61][62] Carbon can also result from adventurous hydrocarbon.…”

Section: Materials Characterizationmentioning

confidence: 99%

“…55 There is also a small reflection from the (110) plane of rutile at 2θ = 28°. 56 In the platinum impregnated samples treated in plasma, reflexions from platinum (typically at 2θ = 39.8°and 46.2°) are not present. 57 This may be due to a low percentage of metallic platinum or a high dispersion of the platinum nanoparticles.…”

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confidence: 99%

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Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water

et al. 2019

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Materials able to produce the reduction of nitrate from water without the need of a metal catalyst and with avoiding the use of gaseous hydrogen have been developed by combining the synergistic properties of titania and two conducting polymers. Polymerization of aniline and pyrrol on titanium dioxide in the presence of two different oxidants/dopants (iron trichloride or potassium persulfate) has been evaluated. The resulting hybrid materials have good thermal stability imparted by the titania counterpart, and a considerable conductivity provided by the conducting polymers. The capability of the hybrid materials of reducing aqueous nitrate has been assessed and compared to the catalytic hydrogenation of nitrate using a platinum catalyst supported on these hybrid synthesized materials. The mechanism of nitrate abatement implies adsorption of nitrate on the polymer by ion exchange with the dopant anion, followed by the reduction of nitrate. The electron transfer from titania to the conducting polymer in the hybrid material favors the reductive ability of the polymer, in such a way that nitrate is selectively reduced with a very low production of undesirable side products. The obtained results show that the activity and selectivity of the catalytic reduction of nitrate with dihydrogen in the presence of a platinum catalyst supported on the hybrid materials are considerably lower than those of the metal-free nanocomposites.

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Section: Resultsmentioning

confidence: 98%

Section: Materials Characterizationmentioning

confidence: 99%

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Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water

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“…Finally, in the last decade the properties and the application potential of the resulting materials have increased very much in interest [20,[51][52][53][54][55][56][57][58][59][60].…”

Section: Microwave Plasma Synthesis Of Particulate Matter In the Histmentioning

confidence: 99%

Microwave Plasma Synthesis of Materials—From Physics and Chemistry to Nanoparticles: A Materials Scientist’s Viewpoint

Szabó

Schlabach

2014

Inorganics

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Abstract:In this review, microwave plasma gas-phase synthesis of inorganic materials and material groups is discussed from the application-oriented perspective of a materials scientist: why and how microwave plasmas are applied for the synthesis of materials? First, key players in this research field will be identified, and a brief overview on publication history on this topic is given. The fundamental basics, necessary to understand the processes ongoing in particle synthesis-one of the main applications of microwave plasma processes-and the influence of the relevant experimental parameters on the resulting particles and their properties will be addressed. The benefit of using microwave plasma instead of conventional gas phase processes with respect to chemical reactivity and crystallite nucleation will be reviewed. The criteria, how to choose an appropriate precursor to synthesize a specific material with an intended application is discussed. A tabular overview on all type of materials synthesized in microwave plasmas and other plasma methods will be given, including relevant citations. Finally, property examples of three groups of nanomaterials synthesized with microwave plasma methods, bare Fe 2 O 3 nanoparticles, different core/shell ceramic/organic shell nanoparticles, and Sn-based nanocomposites, will be described exemplarily, comprising perspectives of applications.

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Microwave Plasma Synthesis of Nanoparticles: From Theoretical Background and Experimental Realization to Nanoparticles with Special Properties

Szabó

2013

Microwaves in Nanoparticle Synthesis

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Photocatalytic Activity of Microwave Plasma-Synthesized TiO2 Nanopowder

Cited by 6 publications

References 26 publications

Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water

Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water

Microwave Plasma Synthesis of Materials—From Physics and Chemistry to Nanoparticles: A Materials Scientist’s Viewpoint

Microwave Plasma Synthesis of Nanoparticles: From Theoretical Background and Experimental Realization to Nanoparticles with Special Properties

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Photocatalytic Activity of Microwave Plasma-Synthesized TiO2 Nanopowder

Cited by 6 publications

References 26 publications

Conducting Polymer–TiO2Hybrid Materials: Application in the Removal of Nitrates from Water

Conducting Polymer–TiO2Hybrid Materials: Application in the Removal of Nitrates from Water

Microwave Plasma Synthesis of Materials—From Physics and Chemistry to Nanoparticles: A Materials Scientist’s Viewpoint

Microwave Plasma Synthesis of Nanoparticles: From Theoretical Background and Experimental Realization to Nanoparticles with Special Properties

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Product

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Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water

Conducting Polymer–TiO₂Hybrid Materials: Application in the Removal of Nitrates from Water