Abstract
Anatase phase of Titanium dioxide (TiO2) is a wide bandgap semiconductor which is active as photocatalyst material under ultraviolet light irradiation. Vanadium dopant has reported to enhance its photocatalytic properties toward visible light irradiation. However, vanadium doped TiO2 has several limitations for further practical application such as its low surface area and difficult in recycling due to its superfine particle. Supporting this material into porous and large surface material like zeolite material supposed to improve its photocatalytic properties. In this research, vanadium doped TiO2 (Ti0.997V0.003O2) photocatalyst was supported on Indonesian natural Zeolite using sonochemical method to study the structural and optical properties of supported photocatalyst. Ti0.997V0.003O2 was loaded into zeolite at various concentration ranging from 10 to 30 % w/w. The X-Ray Diffraction (XRD) data showed that Ti0.997V0.003O2/Zeolite at various concentrations have characteristic of anatase, rutile and mordenite phase structure. Infrared spectra showed the typical vibrational mode of TiO2 and mordenite phase. The sharp peak at 1370 cm-1 which is attributed to the lattice vibration of TiO2 became weaker due to vanadium dopant. The Raman spectra showed that the anatase vibration mode position shifted to higher wavenumber caused by the interaction between Ti0.997V0.003O2 and zeolite. Diffuse Reflectance Spectroscopy (DRS) data revealed that 15% of Ti0.997V0.003O2 on Zeolite has the highest visible light absorption and the lowest band gap energy (2.77 eV or 447 nm) in comparison to the others composition.
Highlights
Titanium dioxide (TiO2) is one of the most investigated semiconductor for photocatalytic process
The X-Ray Diffraction (XRD) data showed that Ti0.997V0.003O2/Zeolite at various concentrations have characteristic of anatase, rutile and mordenite phase structure
Vanadium dopant at low concentration has reported to produce a wider absorption in visible region [1,2,3] and lowering the band gap energy of anatase phase [4] it become potential material to be applied as visible light photocatalyst
Summary
Titanium dioxide (TiO2) is one of the most investigated semiconductor for photocatalytic process. Anatase phase of TiO2 has widely applied as heterogenous photocatalyst material because of its high thermal stability, redox ability, photocatalytic activity and photocatalytic efficiency. Metal dopant serve as acceptor or donor level in wide band TiO2 so it can reduce the recombination process of electron-hole during photocatalytic activity. Vanadium dopant at low concentration has reported to produce a wider absorption in visible region [1,2,3] and lowering the band gap energy of anatase phase [4] it become potential material to be applied as visible light photocatalyst. Vanadium dopant reported to suppress the recombination rate of generated electronhole [5] so it can increase the redox reaction in photocatalytic process
Sign-in/Register to view highlights & summary Sign-in/Register to access full text options 
Free) 
Talk to us
Join us for a 30 min session where you can share your feedback and ask us any queries you have
Schedule a call
