Synthesis of core-shell nanostructured Cr2O3/C@TiO2 for photocatalytic hydrogen production

The photocatalytic performance and mechanism of magnetically retrievable Z-scheme Cr2O3–Fe3O4/C hetero-nanostructure polyhedra

“…And the band gap of Fe 3 O 4 is 1.57 eV, and its E CB and E VB are −0.58 eV and 0.99 eV, respectively. 66,67 Under the assumption of the formation of the traditional heterojunction, the CB of Cr 2 O 3 (0.16 eV) was more positive as compared with the redox potential of ˙O 2 − formation (O 2 /˙O 2 − = −0.33 V vs. NHE), and the electrons on the CB of Cr 2 O 3 could not directly reduce O 2 molecules into ˙O 2 − radicals. The VB of Fe 3 O 4 (0.99 eV) was more negative as compared with the potential required for oxidizing OH − to ˙OH (˙OH/OH − = 1.99 V vs. NHE).…”

Efficient charge migration in TiO2@PB nanorod arrays with core–shell structure for photoelectrochemical water splitting

“…40 The broad peak centred at 658 cm −1 is attributable to the stretching mode of the Ti–O–Ti bridge. 41 In addition, the O–H deformation vibrations of water in the framework are displayed at 1608 cm −1 . UV-vis diffuse reflectance spectra were measured to evaluate the optical adsorption properties of pure TiO 2 , PB and TiO 2 @PB films.…”

Rational design of a 2D TiO2–MoO3 step-scheme heterostructure for boosted photocatalytic overall water splitting

“…17 However, the photocatalytic performance of TiO 2 , like that of the majority of pure photocatalysts, is still far behind practical requirements, owing to its rapid electron–hole recombination. 18–20 A widely used strategy for addressing this issue is to combine TiO 2 with another semiconductor with an appropriate band structure due to the efficient separation of photogenerated electron–hole pairs. 21…”