Skip to Content
Merck
  • High sensitivity hydrogen peroxide and hydrazine sensor based on silver nanocubes with rich {100} facets as an enhanced electrochemical sensing platform.

High sensitivity hydrogen peroxide and hydrazine sensor based on silver nanocubes with rich {100} facets as an enhanced electrochemical sensing platform.

Biosensors & bioelectronics (2013-01-12)
Yinhu Wang, Xuejuan Yang, Jing Bai, Xiue Jiang, Gungyin Fan
ABSTRACT

We report a novel hydrogen peroxide (H2O2) and hydrazine sensor based on low-cost poly(vinylpyrrolidone)-protected silver nanocubes (PVP-AgNCs). The monodisperse silver nanocubes were prepared by adding a trace amount of sodium sulfide in the conventional polyol synthesis for fast reduction of silver nitrate under protection of argon. The sensor was fabricated by simple casting of PVP-AgNCs aqueous solution on a glassy carbon electrode and the performance was evaluated by cyclic voltammetry and amperometric techniques. It was found that the resulting sensor exhibited extremely good performance toward H2O2 detection with wide linear response ranging from 0.05 to 70mM (R=0.996) at -0.3V and low detection limit of 0.18μM estimated at a signal-to-noise ratio of 3. In addition, the fabricated sensor also exhibited high sensitivity toward the detection of hydrazine with a low detection limit of 1.1μM, wide linear range from 0.005 to 0.46mM (R=0.999) at 0.4V and rapid amperometric response time of less than 2s. For both analytes, the sensor exhibited good reproducibility, selectivity and stability. The excellent performance of the sensor might be attributed to the enhanced electrochemical sensing property of well-defined PVP-AgNCs with rich {100} facets.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Hydrazine solution, 1 M in acetonitrile
Sigma-Aldrich
Hydrazine solution, 35 wt. % in H2O
Sigma-Aldrich
Hydrazine monohydrate, N2H4 64-65 %, reagent grade, ≥97%
Sigma-Aldrich
Hydrazine solution, 1.0 M in THF
Sigma-Aldrich
Hydrazine solution, 1.0 M in ethanol
Sigma-Aldrich
Hydrazine sulfate salt, puriss. p.a., ACS reagent, ≥99.0%
Sigma-Aldrich
Hydrazine dihydrochloride, ≥98%
Sigma-Aldrich
Hydrazine sulfate salt, ACS reagent, ≥99.0%