Activation of molecular oxygen in selectively photocatalytic organic conversion upon defective TiO2 nanosheets with boosted separation of charge carriers

Sulfated TiO2 nanosheets catalyzing conversion of biomass derivatives: influences of the sulfation on distribution of Brønsted and Lewis acidic sites

“…The N 2 adsorption–desorption isotherms of both TiO 2 and sulfated TiO 2 displayed a type IV isotherm. The type H3 hysteresis loop was present in all samples, corresponding to an irregular porous structure . However, the pore distribution diagrams varied from one to another.…”

“…TiO 2 nanosheets were prepared with a template‐free method . Tetrabutyl titanate (25 mL) and HF (3 mL) were mixed and stirred for 30 min at room temperature, then the solution was transferred to a 50 mL stainless steel autoclave lined with polytetrafluorethylene.…”

“…Synthesis of TiO 2 nanosheets TiO 2 nanosheets were prepared with a template-free method. 32 Tetrabutyl titanate (25 mL) and HF (3 mL) were mixed and stirred for 30 min at room temperature, then the solution was transferred to a 50 mL stainless steel autoclave lined with polytetrafluorethylene. The autoclave was heated to 180°C and maintained for 24 h. After that, 0.1 mol L −1 NaOH solution was added to the resulting solution, then the mixture was stirred for 30 min, filtered and washed with deionized water and ethanol three times.…”

“…The type H3 hysteresis loop was present in all samples, corresponding to an irregular porous structure. 32,35 However, the pore distribution diagrams varied from one to another. As shown in Fig.…”

Solar‐Driven Photocatalytic Disinfection Over 2D Semiconductors: The Generation and Effects of Reactive Oxygen Species

“…In a defective TiO 2 nanosheet with superficial oxygen vacancies, the two generation routes, energy and electron transfer, jointly accounted for 1 O 2 harvesting, implying the feasibility of integrating the dual routes. [ 263 ] Likewise, the enhanced 1 O 2 generation via the integrated function of electron and energy transfer mechanisms has been observed in other photocatalytic systems, such as defective SbSI nanocrystals and oxygen vacancy‐decorated BiOBr/BiOI heterojunctions ( Figure a). [ 264,265 ] It is worthwhile to mention that although a BiOBr x I 1− x /BiOBr heterostructure exhibited the coexistence of excitons and charge carriers under visible light illumination, the energy transfer routes via excitonic effects dominated the 1 O 2 generation (Figure 15b).…”