Continuous g-C₃N₄layer-coated porous TiO₂fibers with enhanced photocatalytic activity toward H₂evolution and dye degradation

Abstract

TiO2@g-C3N4 core/shell fibers with a continuous g-C3N4 layer packing around exhibit high photocatalytic efficiency toward H2 production and RhB degradation due to the intimate core/shell structure with a high-quality TiO2/g-C3N4 heterojunction.

Kinetic Evidence for Type-II Heterojunction and Z-Scheme Interactions in g-C3N4/TiO2 Nanotube-Based Photocatalysts in Photocatalytic Hydrogen Evolution

“…The magnitude of the upward shift is higher for the m-gC 3 N 4 /TiO 2 -nt (red filled square) composites as a result of high interaction areas between the two materials. Although the upward shift is low for the composite b-gC 3 N 4 /TiO 2 -nt (black filled circle), the type of interaction is promotional (upward shift), suggesting that the formation of the composite between TiO 2 and g-C 3 N 4 is beneficial in enhanced photocatalytic activity as evidenced by the literature. − The H 2 evolution rate of m-gC 3 N 4 /TiO 2 -nt ( x = 0.6) shows the highest value (∼65 μmol/h), which is about 3 times higher than that of the b-gC 3 N 4 /TiO 2 -nt ( x = 0.6) and about 6 times higher than that of pure TiO 2 -nt ( x = 0). The origin of the promotional effect of the interaction should be the separation of photoexcited charge carriers at the contact between g-C 3 N 4 and TiO 2 .…”

“…Charge separation following a direct Z -scheme was proposed for many g-C 3 N 4 /TiO 2 composites with different TiO 2 morphologies including nanotubes, , nanoparticles, , nanorods, , and nanosheets . At the same time, the type-II heterojunction was also predicted for systems with TiO 2 nanotubes, nanoparticles, , nanofibers, and nanowires . Thus, depending on what type of interaction occurs at the interface, g-C 3 N 4 can act as either an electron reservoir ( Z -scheme) or an electron supplier (type-II).…”

Solvent-Free Synthesis of Cu/In Dual-Single-Atom-Doped TiO2 for Photocatalytic Reduction of Cr (VI) with High Efficiency

“…19 Through the interaction between single atoms and substrate, the surface structure of catalysts can be easily adjusted, resulting in an improvement of the absorption capacity of the photocatalyst. 20,21 The synthesis of mesoporous TiO 2 mainly includes hydrothermal method, 22 hard template method, 23 phase change method, and sol−gel method. 24 To control the rate of hydrolysis and condensation of TiO 2 , these methods usually require a large number of polar organic solvents.…”

“…The synthesis of mesoporous TiO 2 mainly includes hydrothermal method, hard template method, phase change method, and sol–gel method . To control the rate of hydrolysis and condensation of TiO 2 , these methods usually require a large number of polar organic solvents.…”

Novel ultralong and photoactive Bi2Ti4O11/TiO2 heterojunction nanofibers toward efficient textile wastewater treatment

“…Therefore, the disadvantages of current techniques are obvious due to their high cost, low treatment efficiency and associated secondary pollution issues for further disposal. To some extent, the resultant sludges are toxic by-products and large carbon footprints are inevitably involved for their further disposal, 6 thus accentuating the need for developing ‘cleaner’ alternative approaches. 7 With the growing emphasis on sustainability and advancement in technology, the use of TiO 2 photocatalysts has begun to receive increasing attention.…”