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Anatase TiO2 nanocrystals were prepared by solvothermal synthesis and modified by in- situ generated Rh nanoparticles, with a starting nominal Rh:Ti atomic concentration of 0.01 and 0.05. After heat-treatment at 400 °C the TiO2 host was still in the anatase crystallographic phase, embedding Rh nanoparticles homogeneously distributed and whose surface had been oxidized to Rh2O3, as established by X-ray diffraction, Transmission Electron Microscopy and X-ray Photoelectron spectroscopy. Moreover, Rh seemed also homogeneously distributed in elemental form or as Rh2O3 nanoclusters. The acetone sensing properties of the resulting materials were enhanced by Rh addition, featuring a response increase of one order of magnitude at the best operating temperature of 300 °C. Moreover, Rh addition enlarged the detection range down to 10 ppm whereas pure TiO2 was not able of giving an appreciable …
Publication date: 
23 May 2020

Mauro Epifani, Saulius Kaciulis, Alessio Mezzi, Ting Zhan, Jordi Arbiol, Pietro Siciliano, Anton Landström, Isabella Concina, Abderrahim Moumen, Elisabetta Comini, Chu Xiangfeng

Biblio References: 
Pages: 128338
Sensors and Actuators B: Chemical