Promoting effect of MgO{sub x} submonolayer coverage of TiO{sub 2} on the photoinduced oxidation of anionic surfactants

Journal Article · Tue May 25 04:00:00 EDT 1999 · Langmuir

DOI:https://doi.org/10.1021/la9816712· OSTI ID:352686

Tada, Hiroaki; Yamamoto, Miwako; Ito, Seishiro ^[1]

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1. Kinki Univ., Higashi-Osaka, Osaka (Japan)

It has been revealed that magnesium acetylacetonate ([Mg{sup II}(acac){sub 2}]) irreversibly adsorbs on TiO{sub 2} from an EtOH and n-hexane mixed solution via a one-to-one stoichiometric ligand exchange of acac{sup {minus}} for Ti{sub s}-O{sup {minus}}, whereas it hardly adsorbs on MgO. The successive oxidation of the resultant surface complex (Mg{sup II}(acac)-(OTi{sub s})) formed a MgO{sub x} submonolayer on the surface of TiO{sub 2}. Six-time repetition of the adsorption-oxidation process achieved an approximate MgO{sub x} monolayer owing to the selective adsorption of [Mg{sup II}(acac){sub 2}] on the portion of naked TiO{sub 2}. The rate of the TiO{sub 2} photoinduced oxidation of sodium dodecylbenzenesulfonate increased with the MgO{sub x} submonolayer coverage ({theta} {approx_equal} 0.5) by a factor of 1.3.

• OSTI ID: 352686
• Journal Information: Langmuir, Journal Name: Langmuir Journal Issue: 11 Vol. 15; ISSN LANGD5; ISSN 0743-7463
• Country of Publication: United States
• Language: English

Related Subjects

32 ENERGY CONSERVATION, CONSUMPTION, AND UTILIZATION
CATALYTIC EFFECTS
MAGNESIUM OXIDES
OXIDATION
PHOTOLYSIS
PROMOTERS
SURFACTANTS
TITANIUM OXIDES
WASTE WATER
WATER TREATMENT