Synergistic photocatalytic degradation of pyridine using precious metal supported TiO2 with KBrO3.

Synergistic photocatalytic degradation of pyridine using precious metal supported TiO2 with KBrO3.

Journal of environmental sciences (China) (2014-02-21)

Fei Tian, Rongshu Zhu, Feng Ouyang

PMID24552059

ZUSAMMENFASSUNG

A series of precious metals catalysts (M/TiO2, M = Ru, Rh, Pd, Ag, Ir, Pt or Au) were prepared by a light deposition method and the synergistic photocatalytic degradations of pyridine (20 mg/L) under UV irradiation (365 nm) using M/TiO2 with electron capture agent KBrO3 have been investigated. The results show that KBrO3 has a greatly synergistic role on M/TiO2 and the photocatalytic activity of M/TiO2 is closely related to its work function. Ag could greatly enhance the activity of TiO2 due to the binding characteristics of pyridine on Ag. Under the conditions of 0.5 wt.% Ag loading, Ag/TiO2 concentration of 0.1 g/L, KBrO3 concentration of 10 mmol/L and reaction liquid pH value at 9, the pyridine can be degraded by 64% within 3 hr, doubled than TiO2 photocatalytic system. The degradation kinetics of pyridine follows first-order kinetics and k = 5.53 x 10(-3) min-1.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

360570

Sigma-Aldrich

Pyridin, ACS reagent, ≥99.0%

270407

Sigma-Aldrich

Pyridin, suitable for HPLC, ≥99.9%

270970

Sigma-Aldrich

Pyridin, anhydrous, 99.8%

718467

Sigma-Aldrich

Titan(IV)-oxid, nanopowder, 21 nm primary particle size (TEM), ≥99.5% trace metals basis

637254

Sigma-Aldrich

Titan(IV)-oxid, Anatase, nanopowder, <25 nm particle size, 99.7% trace metals basis

232033

Sigma-Aldrich

Titan(IV)-oxid, Anatase, powder, 99.8% trace metals basis

14021

Sigma-Aldrich

Titan(IV)-oxid, ReagentPlus^®, ≥99%

248576

Sigma-Aldrich

Titan(IV)-oxid, Anatase, powder, −325 mesh, ≥99% trace metals basis

224227

Sigma-Aldrich

Titan(IV)-oxid, Rutil, powder, <5 μm, ≥99.9% trace metals basis

637262

Sigma-Aldrich

Titan(IV)-oxid, Rutil, nanopowder, <100 nm particle size, 99.5% trace metals basis

634662

Sigma-Aldrich

Titan(IV)-oxid, Mischung aus Rutil und Anatas, nanopowder, <100 nm particle size (BET), 99.5% trace metals basis

348791

Sigma-Aldrich

Titan, foil, thickness 0.127 mm, 99.7% trace metals basis

243086

Sigma-Aldrich

Pyridin -hydrochlorid, 98%

W296600

Sigma-Aldrich

Pyridin, ≥99%

267503

Sigma-Aldrich

Titan, foil, thickness 0.25 mm, 99.7% trace metals basis

366994

Sigma-Aldrich

Titan, powder, <45 μm avg. part. size, 99.98% trace metals basis

268496

Sigma-Aldrich

Titan, powder, −100 mesh, 99.7% trace metals basis

494410

Sigma-Aldrich

Pyridin, biotech. grade, ≥99.9%

700347

Sigma-Aldrich

Titan(IV)-oxid, Mischung aus Rutil und Anatas, nanoparticles, <150 nm particle size (volume distribution, DLS), dispersion, 40 wt. % in H₂O, 99.5% trace metals basis

204757

Sigma-Aldrich

Titan(IV)-oxid, Rutil, ≥99.98% trace metals basis

02486

Supelco

Pyridin, analytical standard

204730

Sigma-Aldrich

Titan(IV)-oxid, Rutil, 99.995% trace metals basis

677469

Sigma-Aldrich

Titan(IV)-oxid, contains 1% Mn as dopant, nanopowder, <100 nm particle size (BET), ≥97%