Dopant-free, polymorphic design of TiO2 nanocrystals by flame aerosol synthesis

Kho, Yung Kent; Teoh, Wey Yang; Mädler, Lutz; Amal, Rose

doi:10.1016/j.ces.2011.02.058

Cited by 34 publications

(33 citation statements)

References 56 publications

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“…The limitation can be overcome by synthesising the TiO 2 in a quartz tube-enclosed FSP (Figure 1g) [50]. By doing so, the free entrainment of ambient air can be prevented, and hence the flame residence time at high temperature regions can be prolonged for defects healing.…”

Section: Simple Metal Oxide Photocatalysts—starting From the Basicsmentioning

confidence: 99%

A Perspective on the Flame Spray Synthesis of Photocatalyst Nanoparticles

Teoh

2013

Materials

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The synthesis of functional nanoparticles via one-step flame spray pyrolysis (FSP), especially those of catalytic nature, has attracted the interests of scientists and engineers, as well as industries. The rapid and high temperature continuous synthesis yields nanoparticles with intrinsic features of active catalysts, that is, high surface area and surface energetics. For these reasons, FSP finds applications in various thermally inducible catalytic reactions. However, the design and synthesis of photocatalysts by FSP requires a knowledge set which is different from that established for thermal catalysts. Unknown to many, this has resulted in frustrations to those entering the field unprepared, especially since FSP appears to be an elegant tool in synthesising oxide nanoparticles of any elemental construct. From simple oxide to doped-oxide, and mixed metal oxide to the in situ deposition of noble metals, this Perspective gives an overview on the development of photocatalysts made by FSP in the last decade that led to a better understanding of the design criteria. Various challenges and opportunities are also highlighted, especially those beyond simple metal oxides, which perhaps contain the greatest potential for the exploitation of photocatalysts design by FSP.

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Section: Simple Metal Oxide Photocatalysts—starting From the Basicsmentioning

confidence: 99%

A Perspective on the Flame Spray Synthesis of Photocatalyst Nanoparticles

Teoh

2013

Materials

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“…More and more researchers focused their attention on the controllable fabrication of anatase TiO 2 . Several methods were developed to form anatase TiO 2 , such as sol-gel methods [13,14], hydrothermal synthesis [15,16], flame synthesis [17,18], ultrasonic irradiation [19,20], chemical vapor synthesis [21] and liquid phase deposition [22,23].…”

Section: Introductionmentioning

confidence: 99%

Glycine assisted synthesis of flower-like TiO2 hierarchical spheres and its application in photocatalysis

Tao¹,

Xu²,

Pan³

et al. 2012

Materials Science and Engineering: B

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“…The studies concluded, at least for P25, a less probable synergistic effect beyond the photocatalytic activity of the individual components. By carefully synthesizing highly crystalline and physically similar anatase and rutile nanoparticles, Kho [49,50] and other studies demonstrated higher rates of hydrogen evolution from aqueous methanol across a wide range of mixed anatase-rutile compositions. The effect, however, was only observed when a strong inter-particle contact existed between the anatase and rutile nanocrystals, supporting the view of an efficient charge separation across heterojunctions in these materials [1].…”

Section: Photocatalyst Materials and Supportsmentioning

confidence: 99%

Heterogeneous Photocatalysis: Recent Advances and Applications

2013

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Semiconductor heterogeneous photocatalysis, the subject of this review, is a versatile, low-cost and environmentally benign treatment technology for a host of pollutants. These may be of biological, organic and inorganic in origin within water and air. The efficient and successful application of photocatalysis demands that the pollutant, the catalyst and source of illumination are in close proximity or contact with each other. The ability of advanced oxidation technology to remove low levels of persistent organic pollutants as well as microorganisms in water has been widely demonstrated and, progressively, the technology is now being commercialized in many areas of the world including developing nations. This review considers recent developments in the research and application of heterogeneous semiconductor photocatalysis for the treatment of low-level concentrations of pollutants in water and air using titanium dioxide as a "model" semiconductor. The review considers charge transport characteristics on the semiconductor surface, photocatalyst reactor design and organic degradation mechanistic pathways. The effects of photoreactor operating parameters on the photocatalytic process are discussed in addition to mineralization and disinfection kinetics.

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Dopant-free, polymorphic design of TiO2 nanocrystals by flame aerosol synthesis

Cited by 34 publications

References 56 publications

A Perspective on the Flame Spray Synthesis of Photocatalyst Nanoparticles

A Perspective on the Flame Spray Synthesis of Photocatalyst Nanoparticles

Glycine assisted synthesis of flower-like TiO2 hierarchical spheres and its application in photocatalysis

Heterogeneous Photocatalysis: Recent Advances and Applications

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