N-doped P25 TiO2–amorphous Al2O3 composites: One-step solution combustion preparation and enhanced visible-light photocatalytic activity

Enhanced visible-light photocatalytic activity of active Al2O3/g-C3N4 heterojunctions synthesized via surface hydroxyl modification

“…On the basis of aforementioned experimental data and analysis, the potential electrons transfer route and photocatalytic mechanism for RhB degradation over Al 2 O 3 /g-C 3 N 4 heterojunctions is presented as Scheme 2. For the composite, electrons on g-C 3 N 4 LUMO can migrate to amorphous Al 2 O 3 and then [33]. In this research, since the position of LUMO of g-C 3 N 4 (−1.13 eV) is more negative than the CB edge potential of TiO 2 (−0.50 eV [62]), the transfer of electrons on g-C 3 N 4 LUMO to defect sites of Al 2 O 3 is easier than those on TiO 2 CB.…”

“…Al 2 O 3 , an "earth abundant" matter, has been widely used as support in the fields of catalysis and materials [30][31][32]. Recently, we have found that Al 2 O 3 containing amorphous substance has photocatalytic activity under ultraviolet light illumination [33] due to its shorter Al O bond length [34]. In the Al 2 O 3 /TiO 2 composite, the amorphous Al 2 O 3 is also an excellent electrons acceptor for TiO 2 because of the existence of large amounts of defect sites.…”

“…In the Al 2 O 3 /TiO 2 composite, the amorphous Al 2 O 3 is also an excellent electrons acceptor for TiO 2 because of the existence of large amounts of defect sites. The transfer of photogenerated electrons of TiO 2 to the defect levels of amorphous Al 2 O 3 greatly benefits the separation of charge carriers [33]. To our knowledge, there is no report that inexpensive Al 2 O 3 was used as effective active compound to design efficient Al 2 O 3 /g-C 3 N 4 photocatalyst.…”

Photocatalytic degradation of humic acids using substrate-supported Fe3+-doped TiO2 nanotubes under UV/O3 for water purification

“…It can be seen that the composites of substratesupported Fe-TNTs exhibited higher S BET values than the unsupported Fe-TNTs. These features increased their photocatalytic performance (Li et al 2012). …”

Preparation and application of poly(zwitterionic ionic liquid) to enhance the photocatalytic activity of TiO2

“…One method to enhance the photocatalytic activity is to change the absorption range of titania in the light range or alter its band gap by doping with other elements, which can shift the absorption wavelength from the UV to visible range [10,11]. Li et al [12] have reported that N-doped TiO 2 clearly enhanced visible-light photocatalytic activity. Another method is to change the surface area by creating a new structure with the aim of enhancing its decomposition efficiency of pollutants.…”