Photocatalytic Destruction of Phenol and Salicylic Acid With Aerosol-Made and Commercial Titania Powders

Fotou, George P.; Pratsinis, Sotiris E.

doi:10.1080/00986449608936551

Cited by 80 publications

(49 citation statements)

References 36 publications

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“…[35]. Apparently, with the same reactor geometry, power of UV lamp, and initial concentration of 2-CP and TiO 2 , the degradation rate or number of radicals is closely related to the dopant type.…”

Section: Resultsmentioning

confidence: 96%

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Shah

Huang

et al. 2002

Materials Science and Engineering: B

106

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TiO 2 nanoparticles were synthesized using metallorganic chemical vapor deposition process. Particles with and without metal ion dopants were obtained. X-ray photoelectron spectroscopy and energy dispersive X-ray spectroscopy measurements confirmed the stoichiometry of the TiO 2 nanoparticles. X-ray diffraction patterns showed a polycrystalline anatase structure of TiO 2 . Transmission electron microscopy revealed that these particles are of nanoscale dimensions. Exact particle size and size distribution analyses were done by dynamic light scattering. The average particle size was determined to be 22 nm. The nanosize particles provide large surface area for photocatalysis and a large number of free surface charge carriers which are crucial for the enhancement of photocatalytic activity. In order to improve the photocatalytic activity, metal ions, including transition metal ions (Pd 2' , Pt 4' , Fe 3' ) and lanthanide ion (Nd 3' ) were added to pure TiO 2 nanoparticles. The effects of dopants on photocatalytic kinetics were investigated by the degradation of 2-chlorophenol under an ultraviolet light source. The results showed that the TiO 2 nanoparticles with the metal ion dopants have higher photocatalytic activity than undoped TiO 2 . Nd 3' showed the largest enhancement. The difference in the photocatalytic activity with different dopants is related to different ionic radii of the dopants. #

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Section: Resultsmentioning

confidence: 96%

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Shah

Huang

et al. 2002

Materials Science and Engineering: B

106

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“…Recently, ZnO nanoparticles have attracted great potential interest compared to TiO 2 nanoparticles [1], due to its highly versatile and promising applications in varistors, electrostatic dissipative coating, catalysts for liquid phase hydrogenation and photo-catalytic degradation, gas sensors, electrical and optical devices, chemical absorbent and solar cells. It has also attracted attention as a promising phosphor for field emission displays (FEDs) [2] compared with the conventional sulfide phosphors.…”

Section: Introductionmentioning

confidence: 99%

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂

Bindu

Thomas

2017

Acta Phys. Pol. A

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In this article we study the optical properties of ZnO nanoparticles. This paper describes cost effective, high yield, and a facile synthetic method for the synthesis of ZnO nanoparticles from precursors viz. linear polysaccharide, chitosan, and ZnCl2 by a precipitation method. The synthesized ZnO nanoparticles were characterized by surface area, pore size, and UV-visible measurements. The optical band gap and the Urbach energy were also calculated and the optical band gap energy of the synthesized ZnO nanoparticles was found to be 3.26 eV and the nature of the optical transition has been identified as direct allowed.

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“…While an array of studies exist on this topic, further comprehensive studies are still needed to better understand the photocatalytic behaviour of different TiO 2 particles. Previously reported studies on the performance of different photocatalysts were limited to comparing Degussa P25 with TiO 2 particles prepared by wet methods such as Millennium PC [4], Hombikat UV 100 [5,6,7] and Ishihara [7] or by dry (flame) methods [8,9] which have different morphologies and more importantly crystallinity.…”

Section: Introductionmentioning

confidence: 99%

Photocatalytic mineralisation of organic compounds: a comparison of flame-made TiO2 catalysts

et al. 2007

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A comparative photocatalytic analysis was carried out on TiO 2 made in a Flame Spray Pyrolysis (FSP) process and flame-made Degussa P25. Both have similar crystallinity, phase composition, phase segregation and a non-porous surface. Hence comparison was made based on their difference in specific surface area, organic adsorption and the amount of OH generated upon illumination. The photocatalytic activity tests were carried out using the following series of organic compounds: sucrose, glucose, fructose, maleic acid, glyoxylic acid, oxalic acid, isobutyric acid, phenol and methanol. FSP-made TiO 2 outperformed P25 for saccharides mineralisation, while for phenol and methanol mineralisation P25 was better than FSP-made TiO 2 . Similar mineralisation rates were observed for both FSP-made and P25 TiO 2 for the mineralisation of carboxylic acids. This shows that the relative performance of the photocatalysts depends on the type of organic compounds to be degraded. The high surface area and possibly a more efficient interfacial charge transfer of FSP-made TiO 2 provided an efficient pathway for saccharides mineralisation. As for phenol and methanol, the mineralisation rates were higher when using P25 due to the greater amount of OH radicals generated by this photocatalyst. The fast mineralisation rates of carboxylic acids made degradation of these organic compounds to be less affected by the TiO 2 photocatalyst properties and conditions tested in this work.

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Photocatalytic Destruction of Phenol and Salicylic Acid With Aerosol-Made and Commercial Titania Powders

Cited by 80 publications

References 36 publications

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂

Photocatalytic mineralisation of organic compounds: a comparison of flame-made TiO2 catalysts

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Photocatalytic Destruction of Phenol and Salicylic Acid With Aerosol-Made and Commercial Titania Powders

Cited by 80 publications

References 36 publications

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Metallorganic chemical vapor deposition and characterization of TiO2 nanoparticles

Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl2

Photocatalytic mineralisation of organic compounds: a comparison of flame-made TiO2 catalysts

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Product

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Optical Properties of ZnO Nanoparticles Synthesised from a Polysaccharide and ZnCl₂