Sol-gel based phenolphthalein encapsulated heterogeneous silica-titania optochemical pH nanosensor
Thermally stable phenolphthalein encapsulated silica-titania nanomatrix is fabricated by sol-gel method for optochemical pH sensing. The particle size ~56-121 nm is obtained with average surface roughness of 3.95 nm after the encapsulation of dye which is highly appropriate for optical and sensing a...
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| Main Authors: | , , , |
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| Format: | Article |
| Published: |
Korean Society of Industrial Engineering Chemistry
2016
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| Subjects: | |
| Online Access: | http://eprints.utm.my/73858/ http://eprints.utm.my/73858/ |
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| Summary: | Thermally stable phenolphthalein encapsulated silica-titania nanomatrix is fabricated by sol-gel method for optochemical pH sensing. The particle size ~56-121 nm is obtained with average surface roughness of 3.95 nm after the encapsulation of dye which is highly appropriate for optical and sensing applications. High surface area value ~218 m2/g, pore volume of 0.16 cm3/g and pore diameter of 31.49 Å is obtained after encapsulation. Furthermore, the sensor response is optimized at pH 10 Fast response time 1-2s, sensitivity with good reproducibility identify that the fabricated optochemical nanosensor is challenging for the detection of pH at room temperature. |
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