Dual-channel charges transfer strategy with synergistic effect of Z-scheme heterojunction and LSPR effect for enhanced quasi-full-spectrum photocatalytic bacterial inactivation: new insight into interfacial charge transfer and molecular oxygen activation

Efficient CO2 reduction over a Ru-pincer complex/TiO2 hybrid photocatalyst via direct Z-scheme mechanism

“…4c), which is thermodynamically unfavorable for the generation of ˙OH. 28,29 As for the Ru(N 3 )(ONO)/TiO 2 hybrid material, the significantly enhanced fluorescence intensity of TA along with prolonging the irradiation time demonstrate that the photoinduced holes of TiO 2 NPs stay on the TiO 2 's VB following a direct Z-scheme mechanism, instead of going to the HOMO of Ru(N 3 )(ONO) complex following a type II heterojunction mechanism because the HOMO of the Ru(N 3 )(ONO) complex is too negative to produce ˙OH. Moreover, the improvement of the ˙OH yield for Ru(N 3 )(ONO)/TiO 2 relative to the TiO 2 NPs proves that the eventually remain on the VB of TiO 2 NPs rather than the HOMO of the Ru(N 3 )(ONO) complex, and such a direct Z-scheme mechanism (left part in Fig.…”

“…Hydroxyl radical (˙OH) generated in the photoreaction system was quantified via a fluorescence method using terephthalic acid (TA) as the probe molecule since ˙OH species can react with TA molecules to produce 2-hydroxyterephthalic acid with strong fluorescence peak at ∼428 nm under an excitation wavelength ( λ ex ) of 285 nm. 28,29 Typically, TA was dissolved into a NaOH solution (2.0 mM) to obtain a TA solution (0.5 mM), then a suspension containing 20 mg of photocatalyst and 100 mL of the TA solution was prepared and irradiated with 300 W Xe-lamp. Subsequently, an aliquot (5.0 mL) was taken from the suspension every 5 min.…”

“…The procedure for obtaining the supernatant is similar to that of the ˙OH quantification experiment, except that the TA solution replaced by the NBT solution, which was maintained in the dark for 1 h to reach an equilibrium before illumination. 28,29…”

Construction of Hierarchical BiOI/MoS2/CdS Heterostructured Microspheres for Boosting Photocatalytic CO2 Reduction Under Visible Light

“…As shown in Equation () and (), hydroxyl radicals (·OH) might have a little contribution to degradation of TC than that of superoxide (·O 2 − ) ascribed to the reaction processes of formation of ·OH, which is more complicated than that of ·O 2 − . [ 72,73 ] In addition, the redox potential of O 2 (O 2 /O 2 − ≈−0.046 eV) [ 74 ] is more positive than the CB of CdS, but close to the CB of MoS 2 , indicating that oxygen molecules easily capture an electron to form ·O 2 − . [ 75 ] When irradiation energy is higher than 1.62 eV (763 nm) or 1.35 eV (921 nm), the ·O 2 − can be generated below the CB of MoS 2 or the CB of CdS.…”

Construction of 1D/2D W₁₈O₄₉/Porous g-C₃N₄ S-Scheme Heterojunction with Enhanced Photocatalytic H₂ Evolution

“…WO is a nanorod-like structure (Fig. 3b) 45,46 . It can be found that WO is attached to the surface of PCN (Fig.…”