Encapsulating Ir nanoparticles into UiO-66 for photo-thermal catalytic CO₂methanation under ambient pressure

Abstract

Photo-thermal catalysis provides a promising strategy for the efficient conversion of carbon dioxide (CO2) into value-added chemicals under mild conditions. Here, we successfully encapsulate iridium (Ir) nanoparticles of ca.1.5 nm...

3D/2D ZnIn2S4/BiFeO3 as S‐scheme heterojunction photocatalyst for boosted visible‐light hydrogen evolution

“…The photoluminescent and photocurrent results are indicative of restrained charge recombination in ZnIn 2 S 4 /BiFeO 3 , which should arise from the formed heterojunction with close interface between ZnIn 2 S 4 and BiFeO 3 39,51 . From Figure 6C, interface charge transfer and conductivity of samples were investigated by electrochemical impedance spectroscopy (EIS) 52 . Conventionally, smaller arc radius of EIS curves demonstrates the higher charge transfer rate, which is beneficial to the efficient separation of photoinduced charges.…”

“…39,51 From Figure 6C, interface charge transfer and conductivity of samples were investigated by electrochemical impedance spectroscopy (EIS). 52 Conventionally, smaller arc radius of EIS curves demonstrates the higher charge transfer rate, which is beneficial to the efficient separation of photoinduced charges. After ZnIn 2 S 4 combining with BiFeO 3 , the arc radius was distinctly reduced, representing a preferable charge conductivity for ZnIn 2 S 4 /BiFeO 3 .…”

Photo-Assisted Catalytic CO2 Hydrogenation to CO with Nearly 100% Selectivity over Rh/TiO2 Catalysts

“…29 In addition, the local temperature of the catalysts under light irradiation is also the key to photo-assisted catalysis. 20 To evaluate the photothermal effect of catalysts, the temperature of the catalyst was recorded by using a thermal infrared imager. Under illumination (200−1100 nm, 2.7 W cm −2 ), the surface temperature of TiO 2 and Rh/TiO 2 -2 (50 mg of the catalysts were diluted into 1.2 g of quartz sands) increased rapidly and then reached stabilization.…”

“…The enhanced light absorption could be attributed to the existence of Rh nanoparticles, which capture the light energy by the interband transition of bound electrons . In addition, the local temperature of the catalysts under light irradiation is also the key to photo-assisted catalysis . To evaluate the photothermal effect of catalysts, the temperature of the catalyst was recorded by using a thermal infrared imager.…”

“…Recently, as an emerging route for CO 2 hydrogenation, photo-assisted catalysis has attracted extensive attention due to its unique merits in reducing the temperature and pressure required for the reaction by introducing light. − Under light irradiation, the photo-excited charge carriers or hot electrons generated on semiconductor materials and plasmonic metals could be injected into the antibonding orbitals of the reactants to promote the activation of reactants . Moreover, the absorbed photon energy could also be converted into heat to elevate the local temperature around the active sites .…”