Synergy of palladium species and hydrogenation for enhanced photocatalytic activity of {001} facets dominant TiO₂ nanosheets

Abstract

Abstract

Molten-salt fabrication of (N,F)-codoped single-crystal-like titania with high exposure of (001) crystal facet for highly efficient degradation of methylene blue under visible light irradiation

“…36,37 All the diffraction peaks of pure TiO 2 , N-TiO 2 (treated with nitrates), (N,F)-TiO 2 , and (N,F)-TiO 2 (treated with nitrates) samples can be indexed to the unique anatase phase, indicating that the doping with nitrogen or nitrogen and fluorine into TiO 2 would not produce any new phases. 38 Furthermore, there are no nitrogen-originated XRD peaks located in the samples, which is probably due to the low dopant content in the samples below the detection limit of the XRD test. Besides, it may also because the dopants are dispersed in the lattice of TiO 2 .…”

Photocatalysis and Li-Ion Battery Applications of {001} Faceted Anatase TiO2-Based Composites

“…Noble metal islands deposited on the TiO 2 surface show surface plasmon resonance (SPR) due to which the visible light absorption of the catalysts increases drastically [80]. It has been reported in the literature that the noble metals such as Pt [81], Au [82] and Pd [83] deposited on TiO 2 -001 have high Schottky barriers among the metals and thus act as electron traps and increase visible light absorption through SPR effect.…”

“…Moreover, the clean (001) surfaces are better for PdO deposition than the fluorine rich surfaces. The PdO attached on {001} facets promoted the separation of charge carriers, and Pd nanoparticles transferred plasmonic-induced electrons to the conduction band of hydrogenated TiO 2 under simulated solar irradiation, thus significantly enhancing the photocatalytic activity of Pd-H-TiO 2 composites [83].…”

Black titania an emerging photocatalyst: review highlighting the synthesis techniques and photocatalytic activity for hydrogen generation

“…5,6,[20][21][22][23][24][25][26] Along with the bandgap tuning, modication of the surface is another route to enhance the catalytic activity, as the reactions occur on the surface of the photocatalyst. 27,28 In the concept of surface modication, Pan et al prepared hydroxylrich TiO 2 and observed a signicant improvement in the hydrogen evolution rate, which is attributed to an increase in water dispersibility and decrease in the agglomeration of TiO 2 crystals. 29 Additionally, our group has made signicant advancement and achieved remarkable catalytic efficiency in this photocatalytic water splitting area by developing and experimenting with a wide range of catalytic materials, including metal oxide, sulphide, phosphide, layered material (MoS 2 , LDH, g-C 3 N 4 ), metal-organic framework (MOF), and quantum dots.…”