US EPA

1324693 

Journal Article 

Design and development of titanium and vanadium oxide photocatalysts incorporated within zeolite cavities and their photocatalytic reactivities 

Anpo, M; Yamashita, H; Matsuoka, M; Park, DR; Shul, YG; Park, SE 

2000 

Yes 

Journal of Industrial and Engineering Chemistry
ISSN: 1226-086X 

6 

2 

59-71 

WOS:000086149100001 

Titanium or vanadium oxide species incorporated within the
framework of zeolites or mesoporous molecular sieves by an ion-exchange method or hydrothermal
synthesis show high and unique photocatalytic activities for various reactions such as the
decomposition of NO into N(2) and O(2) or the reduction of CO(2) with H(2)O to produce CH(4) and
CH(3)OH. In situ photoluminescence, XAFS and ESR investigations revealed that titanium as well as
vanadium oxide moieties exist in highly dispersed tetrahedral coordination states in the zeolite
framework and the charge transfer excited state of these transition metal oxide species play a
vital role in the photocatalytic reactions on these zeolite and molecular sieve catalysts. The
unique physicochemical properties of porous materials such as-pore size, channel structural
dimensions, and distribution of ion-exchangeable sites are shown to be important factors in
controlling the dispersion and local structures of the metal oxides incorporated within such
porous materials as well as the photocatalytic reactivities and selectivities in various
photocatalytic reactions. 

photocatalyst; titanium oxide; vanadium oxide; zeolites; mesoporous molecular sieves