Size effects of nanocrystalline TiO2 on As(V) and As(III) adsorption and As(III) photooxidation

Zhonghou Xu, Xiaoguang Meng

Research output: Contribution to journalArticle

41 Citations (Scopus)

Abstract

The physicochemical properties of TiO2 particles in the diameter range between 6.6 and 30.1 nm and the effect of the crystalline size on arsenic adsorption and photocatalytical oxidation were investigated. TiO2 nanoparticles of different sizes were single-phase anatase. The adsorption capacity of the TiO2 for As(III) and As(V) increased linearly with the N2 Brunauer-Emmett-Teller surface area (SBET) of the particles. There was not much difference in the rate of As(III) photooxidation when the diameter of the TiO2 nanoparticles was between 6.6 and 14.8 nm. However, the As(III) photooxidation rate clearly decreased when the particle size increased to 30.1 nm. Arsenite photooxidation data could be fitted with a first-order kinetics equation.

Original languageEnglish (US)
Pages (from-to)747-752
Number of pages6
JournalJournal of Hazardous Materials
Volume168
Issue number2-3
DOIs
StatePublished - Sep 15 2009

Fingerprint

Photooxidation
size effect
photooxidation
Nanoparticles
Adsorption
adsorption
Arsenic
Particle Size
arsenite
anatase
physicochemical property
Titanium dioxide
arsenic
surface area
Particle size
particle size
Crystalline materials
oxidation
kinetics
Oxidation

All Science Journal Classification (ASJC) codes

  • Pollution
  • Waste Management and Disposal
  • Health, Toxicology and Mutagenesis
  • Environmental Engineering
  • Environmental Chemistry

Cite this

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title = "Size effects of nanocrystalline TiO2 on As(V) and As(III) adsorption and As(III) photooxidation",
abstract = "The physicochemical properties of TiO2 particles in the diameter range between 6.6 and 30.1 nm and the effect of the crystalline size on arsenic adsorption and photocatalytical oxidation were investigated. TiO2 nanoparticles of different sizes were single-phase anatase. The adsorption capacity of the TiO2 for As(III) and As(V) increased linearly with the N2 Brunauer-Emmett-Teller surface area (SBET) of the particles. There was not much difference in the rate of As(III) photooxidation when the diameter of the TiO2 nanoparticles was between 6.6 and 14.8 nm. However, the As(III) photooxidation rate clearly decreased when the particle size increased to 30.1 nm. Arsenite photooxidation data could be fitted with a first-order kinetics equation.",
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Size effects of nanocrystalline TiO2 on As(V) and As(III) adsorption and As(III) photooxidation. / Xu, Zhonghou; Meng, Xiaoguang.

In: Journal of Hazardous Materials, Vol. 168, No. 2-3, 15.09.2009, p. 747-752.

Research output: Contribution to journalArticle

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