Role of hydrothermal temperature on crystallinity, photoluminescence, photocatalytic and gas sensing properties of $TiO_{2}$ nanoparticles

Pramana: Journal of physics

M MALLIGAVATHY^1¹  S IYYAPUSHPAM^2²  S T NISHANTHI^3³ 

[1] Department of Physics, Manonmaniam Sundaranar University, Tirunelveli 627 012, India^1;Department of Physics, Thanthai Hans Roever Arts and Science College, Perambalur 621 212, India^2;Electrochemical Materials Division, Central Electro Chemical Research Institute, Karaikudi 630 003, India^3

关键词: Hydrothermal method;    structural properties;    photocatalytic degradation;    gas sensor;   

DOI  :  

学科分类：物理（综合）

来源: Indian Academy of Sciences

【 摘 要 】

$TiO_{2}$ nanoparticles were synthesised by hydrothermal method. The degree of crystallinity and phase purity were confirmed from the Raman spectra and X-ray diffraction. By increasing the hydrothermal temperature,crystallinity and AC conductivity of the $TiO_{2}$ nanoparticles increase. Nitrogen adsorption–desorption measurements confirmed that the samples were mesoporous with an average pore diameter of 4.4–7.45 nm. Photocatalytic activity of $TiO_{2}$ nanoparticles was evaluated and the sample hydrothermally treated at 160$^\circ$C has the highest photocatalytic activity. In gas sensing measurements, sensitivity increases as a function of concentration and the response to ethanol vapour was better compared to other gases for the sample synthesised at 160$^\circ$C.

【 授权许可】

CC BY