High surface area membrane introduction mass spectrometry for analysis of volatile and semi-volatile organic compounds in air

2001 ◽  
Vol 15 (17) ◽  
pp. 1520-1524 ◽  
Author(s):  
Leah S. Riter ◽  
Zoltán Takáts ◽  
Laurence Charles ◽  
R. Graham Cooks
Keyword(s):  
Mass Spectrometry ◽  
Volatile Organic Compounds ◽  
Surface Area ◽  
Organic Compounds ◽  
High Surface ◽  
High Surface Area ◽  
Membrane Introduction Mass Spectrometry ◽  
Volatile Organic

Sol-Gel Preparation, Characterization and Photocatalytic Activity of Nanostructured TiO2 Nanoparticles

2012 ◽  
Vol 1372 ◽  
Author(s):  
R. Carrera ◽  
S. Castillo
Keyword(s):  
Volatile Organic Compounds ◽  
Physicochemical Properties ◽  
Organic Compounds ◽  
Photocatalytic Oxidation ◽  
High Surface ◽  
Sol Gel ◽  
High Surface Area ◽  
Photocatalytic Decomposition ◽  
Volatile Organic ◽  
Gel Preparation

ABSTRACTTo establish a promising method for the purification of air containing volatile organic compounds, TiO2 nanoparticles with interesting physicochemical properties were prepared by the sol-gel method to perform the photocatalytic decomposition of acetaldehyde. The obtained samples were characterized by the x-ray diffraction -Rietveld refinement, transmission electron microscopy (TEM) and the Brunauer, Emmet and Teller (BET) model. According to the results, the sample that presented the highest activity (96.4%) in the photocatalytic oxidation of acetaldehyde was the one annealed at 200 °C. This material showed the presence of a mixture of the anatase (higher proportion) and brookite phases, nanometric crystal size (7.03 nm) and high surface area (189 m2g-1). The physicochemical properties present in the TiO2-P-200°C nanoparticles suggest that they may establish a photoassisted reaction process for air purification, in which volatile organic compounds are photocatalitically decomposed.

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