Electro-catalytic activity of palladium modified nitrogen doped titania nanoparticles.

Electro-catalytic activity of palladium modified nitrogen doped titania nanoparticles.

Journal of nanoscience and nanotechnology (2014-04-17)

Bijuan Zheng, Bei Qi, Yulong Hu, Fan Zhang, Hongfang Liu

ABSTRACT

Pd-modified N-doped TiO2 nanoparticles were prepared by the sol-gel method. The X-ray diffraction (XRD) pattern indicated that the pure anatase TiO2 has been obtained. Transmission electron microscope (TEM) was used to observe the micro-morphology of the nanoparticles. The average size of the particles was 8.04 nm. The N2 adsorption isotherm of the resulted nanoparticles was the type IV with a H1 type hysteresis loop. The specific surface area was 145.2 m2 g(-1) and the average diameter of adsorption was 4.178 nm. These Pd-modified N-doped TiO2 nanoparticles were applied onto the surface of glass carbon electrode (GCE), and its electro-catalytic activity was tested by cyclic voltammetry (CV). The reduction peak currents showed a linear response to the dissolved oxygen (DO) concentrations ranging from 0.6 mg L(-1) to 7.2 mg L(-1) on the Pd-N-TiO2/ GCE. The linear regression equation was y = 3E - 6x + 1E-5 (R = 0.9909). The detection limit was 0.22 mg L(-1.) The result indicated that the Pd-N-TiO2 possessed a good electro-catalytic activity.

MATERIALS

Product Number

Brand

Product Description

305812

Sigma-Aldrich

Titanium, 5-10 mm, ≥99.99% trace metals basis (purity exclusive of Na and K content)

IRMM531B

Titanium, IRMM^®, certified reference material, 0.5 mm foil

IRMM531C

Titanium, IRMM^®, certified reference material, 0.5 mm wire

GF62977540

Titanium, tube, 200mm, outside diameter 2.03mm, inside diameter 1.63mm, wall thickness 0.2mm, annealed, 99.6+%

GF62676759

Titanium, rod, 200mm, diameter 2mm, as drawn, 99.99+%

GF25290581

Titanium, tube, 1000mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF82635138

Titanium, tube, 500mm, outside diameter 6.35mm, inside diameter 5.53mm, wall thickness 0.41mm, annealed, 99.6+%

GF25880485

Titanium, tube, 100mm, outside diameter 6.35mm, inside diameter 5.53mm, wall thickness 0.41mm, annealed, 99.6+%

GF46592949

Titanium, wire, straight, 1000mm, diameter 1.0mm, as drawn, 99.6+%

GF16602768

Titanium, wire reel, 1m, diameter 0.5mm, as drawn, 99.99+%

267902

Sigma-Aldrich

Titanium, wire, diam. 0.81 mm, 99.7% trace metals basis

348791

Sigma-Aldrich

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

GF61322699

Titanium, rod, 100mm, diameter 2mm, annealed, 99.6+%

GF94150593

Titanium, wire reel, 10m, diameter 1.5mm, as drawn, 99.6+%

GF96391402

Titanium, wire reel, 25m, diameter 0.20mm, annealed, 99.6+%

GF76266423

Titanium, wire reel, 0.5m, diameter 1.0mm, annealed, 99.6+%

266035

Sigma-Aldrich

Titanium, wire, diam. 1.0 mm, 99.99% trace metals basis

460400

Sigma-Aldrich

Titanium, wire, diam. 0.25 mm, 99.7% trace metals basis

369489

Sigma-Aldrich

Titanium, foil, thickness 2.0 mm, 99.7% trace metals basis

GF71020235

Titanium, wire reel, 0.5m, diameter 1.0mm, as drawn, 99.6+%

GF90963928

Titanium, rod, 25mm, diameter 50mm, 99.99+%

GF82495198

Titanium, rod, 200mm, diameter 9.5mm, annealed, 99.99+%

GF29391329

Titanium, tube, 1000mm, outside diameter 6.35mm, inside diameter 5.53mm, wall thickness 0.41mm, annealed, 99.6+%

GF68670366

Titanium, tube, 1220mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

GF40775610

Titanium, wire reel, 1m, diameter 0.20mm, annealed, 99.6+%

GF05925281

Titanium, microfoil, disks, 10mm, thinness 0.1μm, specific density 42.8μg/cm², permanent mylar 3.5μm support, 99.6+%

GF36425707

Titanium, wire reel, 200m, diameter 0.20mm, annealed, 99.6+%

GF52551222

Titanium, microfoil, disks, 10mm, thinness 0.25μm, specific density 112.6μg/cm², permanent mylar 3.5μm support, 99.6+%

GF50624434

Titanium, wire reel, 200m, diameter 0.25mm, annealed, 99.6+%

GF61228403

Titanium, wire reel, 50m, diameter 0.75mm, as drawn, 99.6+%