Highly Active Rutile TiO₂ Nanocrystalline Photocatalysts

Abstract

The controllable synthesis of rutile TiO 2 single crystal particles with preferential orientation of {111} facets still remain a scientific and technological challenge. Here, we developed a facile route to fabrication of rutile TiO 2 nanorod crystals (RTiO 2 NRs) having high ratios of oxidative {111} to reductive {110} surfaces. RTiO 2 NRs were synthesized using a peroxo-titanium complex (PTC) approach, which was controlled by changing the Ti/H 2 O 2 ratio.The thus obtained RTiO 2 NRs revealed a high tendency to agglomerate through orientationdependent attachment along the {110} facets. This resulted in an increased {111}/{110} surface ratio and lead to a markedly improved photocatalytic activity of RTiO 2 NRs aggregates. The reported findings illustrate the rich potential of the herein proposed facile and energy-efficient synthesis of nanostructured rutile TiO 2 -based photocatalysts.

The facile fabrication and structural control of carbon‐MIL‐125 by coupling pre‐hydrolysate and Ti‐MOF for photocatalytic sterilization under visible light

“…A characteristic anatase TiO 2 peak also was produced at 25.3°, corresponding to the (101) plane 14 . In addition, a peak appeared at 27.5° corresponding to the (110) crystal plane of rutile TiO 2 , 15 indicating that both samples contained crystalline TiO 2 in the anatase and rutile phases. Generally, anatase displayed the photoactive form, whereas rutile is considered to have a low photocatalytic activity.…”

An in-and-out-the-lab Raman spectroscopy study on street art murals from Reggio Emilia in Italy

“…This is the simplest possible explanation, but this would mean that the lightfastness of PO34 (and many other pigments showing fading in these paintings) is very poor, less than expected. One should take into account the fact that nanocrystalline TiO 2 rutile is an efficient photo-catalyst, able to induce degradation of organic molecules exposed to sunlight [58][59][60][61]. The absence of any PO34 degradation products, which have not been found in the outer layer, can be supported by the efficient photocatalytic activity of TiO 2 .…”

Investigation of the Sn4+-distribution and photocatalytic performance of Sn4+/TiO2 hollow fiber nanomaterials

“…[1][2][3] Nanocrystalline titanium dioxide (TiO 2 ) has received considerable attention as one kind of highly-efficient photocatalyst due to its many advantages. [4][5][6][7] However, the wide band gap limits its adsorption to visible light, which is only a very small fraction (o5%) of the solar radiation that arrives at the earth's surface. In addition, the quick recombination of photogenerated charges is also another limitation for achieving a high photocatalytic efficiency of TiO 2 .…”