Abstract
We successfully fabricated a planar nanocomposite film that uses a composite of silver nanoparticles and titanium dioxide film (Ag-TiO2) for ultraviolet (UV) and blue light detection and application in ozone gas sensor. Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect. A strong redshift of the plasmonic peak when the silver nanoparticles covered the TiO2 thin film was observed. The value of conductivity change for the Ag-TiO2 composite is 4–8 times greater than that of TiO2 film under UV and blue light irradiation. The Ag-TiO2 nanocomposite film successfully sensed 100 ppb ozone. The gas response of the composite film increased by roughly six and four times under UV and blue light irradiation, respectively. We demonstrated that a Ag-TiO2 composite gas sensor can be used with visible light (blue). The planar composite significantly enhances photo catalysis. The composite films have practical application potential for wearable devices.
Highlights
Due to growing environmental awareness, photocatalysts have been identified as green materials for reducing air pollution [1]
We successfully used a composite of silver nanoparticles and titanium dioxide film film (Ag-TiO2 )
Ultraviolet-visible spectra revealed that silver nanoparticles have a strong surface plasmon resonance (SPR) effect
Summary
Due to growing environmental awareness, photocatalysts have been identified as green materials for reducing air pollution [1]. According to researchers, doping noble-metal particles can enhance the photocatalytic and degradation efficiency of TiO2 for chemical or biological matter. Absorption spectra show good response in visible light when TiO2 nanocomposites (metal-doped TiO2 ) are used [7,8,9,10,11,12]. Several methods, such as metal particle doping, polymer nanocomposites, and core-shell nanoparticles [13,14,15,16], have been developed to enhance photocatalysis
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