Unusual synthesis of safflower-shaped TiO2/Ti3C2 heterostructures initiated from two-dimensional Ti3C2 MXene

The preparation of three-dimensional flower-like TiO2/TiOF2 photocatalyst and its efficient degradation of tetracycline hydrochloride

“…17 Among these methods, photocatalytic water purication technology is considered to be the most promising water treatment technology due to its cost-effectiveness, efficiency and environment friendliness. [18][19][20] TiO 2 , as the most commonly used semiconductor photocatalyst, is nontoxic and chemically stable. 5,7 However, it has a wide energy band gap (3.0-3.2 eV, which means it only reacts to UV) and a high carrier recombination rate.…”

Efficient Photocatalytic Degradation of Organic Dyes by AgNPs/TiO2/Ti3C2Tx MXene Composites under UV and Solar Light

“…The typical photodegradation mechanism of organic molecules comprises redox reactions with the formation of free radicals, primarily generated by scavenging of photoinduced electrons by O 2 molecules to form O 2 •– anion radicals or by the oxidation of hydroxyl groups and water molecules, by photogenerated holes, to form OH • radicals. 45 , 69 The proposed degradation process, for the systems here reported, combines several mechanisms of charge transfer. One of the main mechanisms involves the movement of photogenerated electrons from the TiO 2 conduction band (CB) to the valence band (VB).…”

“…According to My Tran et al, this process promotes charge separation by reducing the chances of recombination and enhancing the lifetime of photogenerated electrons. 69 In further detail, the photogenerated electrons would quickly migrate from TiO 2 to the surface of MXene, which acts as an electron reservoir. The electron-rich reactive centers on the Ti 3 C 2 surface are then responsible for O 2 •– radical formation.…”

“… 19 , 70 , 71 On the other hand, the photogenerated holes can oxidize either the superficial hydroxyl groups on the TiO 2 particles, the surrounding water molecules, and potentially the OH groups on the MXene surface, to form OH • radicals. 69 …”

Novel hierarchical structure of MoS2/TiO2/Ti3C2Tx composites for dramatically enhanced electromagnetic absorbing properties

“…Additionally, the Ti−O peak appeared in all the samples. Compared with Ti 3 C 2 T x , the Ti−O peak of both TiO 2 /Ti 3 C 2 T x and MoS 2 /TiO 2 /Ti 3 C 2 T x composites (S2) shifts to ~154 cm −1 , suggesting that more defects were generated during the hydrothermal process [28]. Furthermore, the strong D and G peaks of the composites are at 1382 and 1576 cm −1 , respectively.…”