期刊
RSC ADVANCES
卷 4, 期 54, 页码 28814-28821出版社
ROYAL SOC CHEMISTRY
DOI: 10.1039/c4ra04058a
关键词
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资金
- Department of Science & Technology (DST), Government of India, for Ramanujan Fellowship award [SR/S2/RJN-18/2011, SR/S3/CE/034/2013]
A novel low-voltage non-gassing electro-osmotic pump using organic-dye electrodes and aluminosilicate frits is demonstrated. Good control of the flow rate is achieved by tuning the zeta potential of the frits in the range of -32.7 mV to -52 mV by varying the aluminum concentration of the aluminosilicate microparticles. The flow rate delivered by the pump is linearly dependent on the zeta potential. The aluminosilicate frits with a maximum zeta potential of -52 mV engendered a maximum flow rate of 27 +/- 1.5 mu L min(-1) V-1 cm(-2). In a continuous operation lasting 11 h, the assembled electro-osmotic pump (EOP) can deliver 7.3 mL of a test solution at 60 mu A current density. The flow resulted from concerted shifting of protons generated at the anode by electro-oxidation. The consumption of protons at the cathode was accompanied by decomposition of the dye. The non-gassing pump was operated at 0.5 V, which is well below the thermodynamic potential of water electrolysis. The obtained flow rate and pumped volume is sufficient to deliver a bolus of insulin for diabetes management.
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