In:
Zeitschrift für Physikalische Chemie, Walter de Gruyter GmbH, Vol. 227, No. 4 ( 2013-4-1), p. 419-428
Abstract:
This paper reports a low cost and disposable pH sensor made with a cellulose and tin oxide hybrid composite. Cellulose- tin oxide hybrid composite was prepared by wet chemical method, which involves immersion of a wet regenerated cellulose film in to a mixture of deionized water and SnF 2 (5 mM concentration), maintained at 90 ºC for a given time; 6, 12, 18 and 24 h with stirring. The proposed pH sensor showed a consistent increase of its conductance, and the sensitivity defined as the change of resistance with respect to the pH level portrays three regions with different slope rates depending on the pH value: 0.4 MΩ/pH, 31.2 kΩ/pH and 0.2 MΩ/pH in pH range of 1–4, 4–8 and 8–12, respectively. The high sensitivity at the pH range of 4–8 is very useful for industrial applications. Also, Since the proposed pH sensor is made with cellulose film, it is disposable, cheap and environment-friendly.
Type of Medium:
Online Resource
ISSN:
2196-7156
,
0942-9352
DOI:
10.1524/zpch.2013.0339
Language:
English
Publisher:
Walter de Gruyter GmbH
Publication Date:
2013
detail.hit.zdb_id:
201103-7
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