Ti3C2 MXene-induced interface electron separation in g-C3N4/Ti3C2 MXene/MoSe2 Z-scheme heterojunction for enhancing visible light-irradiated enoxacin degradation

Advances in Titanium Carbide (Ti3C2Tx) MXenes and Their Metal–Organic Framework (MOF)-Based Nanotextures for Solar Energy Applications: A Review

“…The role of Ti 3 C 2 T x MXene as the electron mediator facilitates the electrons from the CB of TiO 2 to transfer to the VB of CdS, hastening the electron migration. Another study disclosed the significance of Ti 3 C 2 T x MXene in mediating the electron transfer between g-C 3 N 4 and MoSe 2 , constructing a Z-scheme heterojunction system . Separation of photocarriers was enhanced, and the electrons effectively transferred from one semiconductor to another semiconductor to undergo a redox reaction.…”

“…Another study disclosed the significance of Ti 3 C 2 T x MXene in mediating the electron transfer between g-C 3 N 4 and MoSe 2 , constructing a Zscheme heterojunction system. 184 Separation of photocarriers was enhanced, and the electrons effectively transferred from one semiconductor to another semiconductor to undergo a redox reaction. The vital role of Ti 3 C 2 T x MXene as a trapping center and a mediator provides greater reductive/oxidative ability as more electrons are available and less recombination occurs.…”

MXene-Based Photocatalysts in Degradation of Organic and Pharmaceutical Pollutants

“…The Z-scheme heterojunction-based photocatalyst has advantages of excellent electron–hole pairs separation efficiency, robust redox potential, and a broad light response range; the significant power of oxidization and reduction makes the Z-scheme heterojunction suitable for degradation of pollutants in water [ 83 , 84 , 85 ]. In one study, a Z-scheme heterojunction of g -C 3 N 4 /MXene (Ti 3 C 2 )/MoSe 2 was developed to achieve effective visible light-induced removal of enoxacin within 60 min [ 86 ]. Accordingly, MXene-stimulated interface electron separation could play an important role on degradation with high efficiency.…”

“…During degradation, most commonly produced reactive species were • O 2 − and photogenerated electrons. The prepared photocatalyst exhibited promising degradation potential for other pollutants, including norfloxacin (~80%), moxifloxacin (~100%), ofloxacin (~100%), gatifloxacin (~65%), levofloxacin (~100%), and ciprofloxacin (~80%) [ 86 ]. Cao et al [ 87 ] synthesized g -C 3 N 4 /TiO 2 @Ti 3 C 2 photocatalysts for effective visible light degradation of pollutants such as MO, revealing higher degradation rates with improved photocatalytic performance owing to the Z-type heterojunctions in the nanocomposites.…”

Interfacial Solid-State Mediator-Based Z-Scheme Heterojunction TiO2@Ti3C2/MgIn2S4 Microflower for Efficient Photocatalytic Pharmaceutical Micropollutant Degradation and Hydrogen Generation: Stability, Kinetics, and Mechanistic Insights

“…Because of the fascinating intrinsic characters such as large specific surface area, metallic conductivity, flexible elemental composition, abundant termination groups, and low Fermi level, the Ti 3 C 2 MXene displays remarkable potential as an effective cocatalyst in the photocatalysis and environment-related fields. − The Ti 3 C 2 MXene contains a large proportion of Ti resources to derive in situ TiO 2 and establishes a heterostructure due to the thermodynamical metastability of the marginal Ti atoms at the edge of the Ti 3 C 2 T x surface. − Meanwhile, during the slight oxidation process, the Ti electron orbitals undergo a significant change to form a strong chemical bond and provide a robust electronic interaction to improve the rapid transport of photogenerated charge carriers. In addition, the metallic Ti 3 C 2 T x endows itself with the ability to capture photogenerated electrons and thereby regulate the direction of the photogenerated charge carriers. − Till date, so many progresses such as Ti 3 C 2 /TiO 2 /ZIS, Ti 3 C 2 /TiO 2 / BiOCl, Ni 2 P/TiO 2 /Ti 3 C 2 , Cu/TiO 2 @Ti 3 C 2 T x , and Ru/MXene/TiO 2 have been developed on Ti 3 C 2 partially derived TiO 2 hybrids for various photocatalytic applications. However, the conventional type-II heterojunction photocatalysts limit their applications in various photocatalytic reactions due to low redox potentials to evolve active species.…”