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

IRMM531C

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

IRMM531B

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

369489

Sigma-Aldrich

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

348848

Sigma-Aldrich

Titanium, foil, thickness 0.025 mm, 99.98% trace metals basis

266035

Sigma-Aldrich

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

348791

Sigma-Aldrich

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

305812

Sigma-Aldrich

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

460400

Sigma-Aldrich

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

267902

Sigma-Aldrich

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

GF91672139

Titanium, wire reel, 20m, diameter 0.05mm, hard, 99.8%

GF43519945

Titanium, wire reel, 2m, diameter 1.0mm, as drawn, 99.99+%

GF34996685

Titanium, wire reel, 200m, diameter 0.125mm, annealed, 99.6+%

GF96391402

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

GF80908544

Titanium, wire reel, 1m, diameter 1.5mm, as drawn, 99.6+%

GF43403431

Titanium, wire reel, 500m, diameter 0.20mm, annealed, 99.6+%

GF36425707

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

GF31085760

Titanium, wire reel, 5m, diameter 0.25mm, as drawn, 99.99+%

GF14377631

Titanium, wire reel, 25m, diameter 0.25mm, annealed, 99.6+%

GF50624434

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

GF46592949

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

GF00761217

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

GF84917188

Titanium, wire reel, 1m, diameter 0.25mm, as drawn, 99.99+%

GF32801251

Titanium, tube, 1000mm, outside diameter 1.05mm, inside diameter 0.75mm, wall thickness 0.15mm, annealed, 99.6+%

GF25880485

Titanium, tube, 100mm, 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+%

GF50171318

Titanium, rod, 25mm, diameter 16mm, as drawn, 99.99+%

GF72212813

Titanium, tube, 200mm, outside diameter 25.4mm, inside diameter 23.62mm, wall thickness 0.89mm, annealed, 99.6+%

GF05438066

Titanium, tube, 1000mm, outside diameter 1.6mm, inside diameter 1.2mm, wall thickness 0.2mm, hard, 99.6+%

GF13915447

Titanium, tube, 100mm, outside diameter 2.03mm, inside diameter 1.55mm, wall thickness 0.24mm, annealed, 99.6+%

GF11909932

Titanium, tube, 100mm, outside diameter 4.25mm, inside diameter 3.75mm, wall thickness 0.25mm, annealed, 99.6+%