Sensing of contaminants in potable water using TiO{sub 2} functional film

Journal Article · Wed Apr 13 00:00:00 EDT 2016 · AIP Conference Proceedings

DOI:https://doi.org/10.1063/1.4945201· OSTI ID:22591092

Akshatha, N.; Poonia, Monika; Manjuladevi, V.; Shukla, P.; Gupta, Rajiv ^[1]

---

1. Birla Institute of Technology and Science, Pilani, 333031, Rajasthan (India)

The piezoelectric based quartz crystal microbalance is employed for sensing contaminants in potable water. A spin coated thin layer of TiO{sub 2} nanoparticles was formed at the sensing area of a 5 MHz AT-cut quartz wafer. The thin film of TiO{sub 2} nanoparticles forms a mesoporous functional layer for the trapping of water borne contaminants. The morphology of the thin film of TiO{sub 2} nanoparticles was studied using field emission scanning electron microscope (FESEM). The surface morphology of the TiO{sub 2} nanoparticles reveals the mesoporous structures indicating large number of defects and porous sites. Such film was employed for the detection of water borne contaminants by detecting the piezoelectric response from a quartz crystal microbalance. We found the film to be very sensitive to the contaminants. The minimum detection limit was found to be 330 ppb. The effect of surface recharging was also studied by altering the physical conditions so that the film can be used for repetitive usage.

• OSTI ID: 22591092
• Journal Information: AIP Conference Proceedings, Journal Name: AIP Conference Proceedings Journal Issue: 1 Vol. 1724; ISSN APCPCS; ISSN 0094-243X
• Country of Publication: United States
• Language: English

Related Subjects

37 INORGANIC, ORGANIC, PHYSICAL, AND ANALYTICAL CHEMISTRY
71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
77 NANOSCIENCE AND NANOTECHNOLOGY
CRYSTALS
DRINKING WATER
FIELD EMISSION
LAYERS
MHZ RANGE
MICROBALANCES
MORPHOLOGY
NANOPARTICLES
NANOSTRUCTURES
PIEZOELECTRICITY
POLLUTANTS
POROUS MATERIALS
QUARTZ
SCANNING ELECTRON MICROSCOPY
SENSITIVITY
SURFACES
THIN FILMS
TITANIUM OXIDES
TRAPPING