Surface acidity and photocatalytic activity of TiO[sub 2], WO[sub 3]/TiO[sub 2], photocatalysts

Journal Article · Fri Apr 01 00:00:00 EST 1994 · Chemistry of Materials; (United States)

DOI:https://doi.org/10.1021/cm00040a026· OSTI ID:7070066

Papp, J; Dwight, K; Wold, A ^[1]; Soled, S ^[2]

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1. Brown Univ., Providence, RI (United States)
2. Exxon Research Engineering, Annandale, NJ (United States)

TiO[sub 2] powder samples were calcined at various temperatures and their photocatalytic activity toward the degradation of 1,4-dichlorobenzene was measured. The surface acidity of the sample was also determined by the n-butylamine titration method. A linear relationship between photocatalytic activity and surface acidity was observed for the TiO[sub 2] samples. WO[sub 3]/TiO[sub 2] mixed oxide powders and MoO[sub 3]/TiO[sub 2] greatly enhanced its photocatalytic properties. The addition of WO[sub 3] or MoO[sub 3] to TiO[sub 2] also increased the catalysts' surface acidity, as determined by the n-butylamine titration method. A correlation between the maximum photocatalytic activity and the maximum surface acidity was observed. Whereas acidity may not be the only factor which influences activity, it is certainly an important one. 55 refs., 4 figs., 3 tabs.

• OSTI ID: 7070066
• Journal Information: Chemistry of Materials; (United States), Vol. 6:4; ISSN 0897-4756
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC
ORGANIC
PHYSICAL AND ANALYTICAL CHEMISTRY
CHLORINATED AROMATIC HYDROCARBONS
DECOMPOSITION
MOLYBDENUM OXIDES
CATALYTIC EFFECTS
TITANIUM OXIDES
TUNGSTEN OXIDES
PHOTOCHEMISTRY
AROMATICS
CHALCOGENIDES
CHEMICAL REACTIONS
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HALOGENATED AROMATIC HYDROCARBONS
MOLYBDENUM COMPOUNDS
ORGANIC CHLORINE COMPOUNDS
ORGANIC COMPOUNDS
ORGANIC HALOGEN COMPOUNDS
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REFRACTORY METAL COMPOUNDS
TITANIUM COMPOUNDS
TRANSITION ELEMENT COMPOUNDS
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400201* - Chemical & Physicochemical Properties