Room temperature ferromagnetism in vacuum-annealed TiO2 thin films

Influence of surface disorder, oxygen defects and bandgap in TiO2 nanostructures on the photovoltaic properties of dye sensitized solar cells

“…There is no considerable change in peak positions in all these samples before and after hydrogen treatment. This observation together with the large increase in the background indicates possible amorphization of TiO 2 nanoparticle surface layers due to the morphology dependent oxygen vacancy formation leading to local disorder [41,42]. It is noteworthy to observe that the large background in the Raman spectra is seen more prominently in the samples prepared using Ti substrates, which enables the easy reduction of TiO 2 nanostructures on annealing under hydrogen ambient.…”

Defect-trapped electrons and ferromagnetic exchange in ZnO

“…[1][2][3][4][5][6][7][8] More recently, there have been reports of room-temperature ferromagnetism in oxide thin films prepared without TM doping [9][10][11][12][13] and the term "d 0 magnetism" has been coined. 9 Many experimental studies invoke oxygen 2,7,11,12,[14][15][16] or metal cation defects 9,10 in the exchange-coupling mechanism.…”

Preparation and photocatalytic performance of TiO2/PbTiO3 fiber composite enhanced by external force induced piezoelectric field

“…Due to its simple preparation requirements, low cost, lack of toxicity, good photochemical stability, and strong redox ability, TiO 2 has become a research hotspot as a semiconducting photocatalyst . However, the low photocatalytic activity of TiO 2 seriously hinders its practical application . To solve this problem, many researchers have combined TiO 2 with other narrow‐bandgap semiconducting photocatalysts to form heterojunctions to separate photo‐generated carriers .…”