Electrochemical degradation of nitrobenzene by anodic oxidation on the constructed TiO2-NTs/SnO2-Sb/PbO2 electrode.

Electrochemical degradation of nitrobenzene by anodic oxidation on the constructed TiO2-NTs/SnO2-Sb/PbO2 electrode.

Chemosphere (2014-07-30)

Yong Chen, Hongyi Li, Weijing Liu, Yong Tu, Yaohui Zhang, Weiqing Han, Lianjun Wang

ZUSAMMENFASSUNG

The interlayer of Sb-doped SnO2 (SnO2-Sb) and TiO2 nanotubes (TiO2-NTs) on Ti has been introduced into the PbO2 electrode system with the aim to reveal the mechanism of enhanced electrochemical performance of TiO2-NTs/SnO2-Sb/PbO2 electrode. In contrast with the traditional Ti/SnO2-Sb/PbO2 electrode, the constructed PbO2 electrode has a more regular and compact morphology with better oriented crystals of lower size. The TiO2-NTs/SnO2-Sb interlayer prepared by electrodeposition process improves PbO2 coating structure effectively, and enhances the electrochemical performance of PbO2 electrode. Kinetic analyses indicated that the electrochemical oxidation of nitrobenzene on the PbO2 electrodes followed pseudo-first-order reaction, and mass transport was enhanced at the constructed electrode. The accumulation of nitrocompounds of degradation intermediates on constructed electrode was lower, and almost all of the nitro groups were eliminated from aromatic rings after 6h of electrolysis. Higher combustion efficiency was obtained on the constructed TiO2-NTs/SnO2-Sb/PbO2 electrode. The intermediates of nitrobenzene oxidation were confirmed by IC and GC/MS.

MATERIALIEN

Produktnummer

Marke

Produktbeschreibung

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

252379

Sigma-Aldrich

Nitrobenzol, ACS reagent, ≥99.0%

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

N10950

Sigma-Aldrich

Nitrobenzol, ReagentPlus^®, 99%

348791

Sigma-Aldrich

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

391352

Sigma-Aldrich

Blei, powder, −100 mesh, 99.95% trace metals basis

267503

Sigma-Aldrich

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

266329

Sigma-Aldrich

Antimon, powder, -100 mesh, 99.5% 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

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

452343

Sigma-Aldrich

Antimon, beads, ≤5 mm, low oxide, 99.999% trace metals basis

204730

Sigma-Aldrich

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

396117

Sigma-Aldrich

Blei, shot, <2 mm, 99.9% trace metals basis