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

Journal Article · Fri Apr 01 04:00:00 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]

---

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

Related Subjects

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