Highly selective visible-light-triggered CO₂ fixation to cyclic carbonates under mild conditions using TiO₂/multiwall carbon nanotubes (MWCNT) grafted with Pt or Pd nanoparticles

Abstract

Irradiation of a series of aromatic epoxides and CO2 in presence of TiO2, TiO2/MWCNT, Pt//TiO2/MWCNT and Pd/TiO2/MWCNT photocatalysts was investigated with visible light- induced cycloaddition reaction for the production of...

Metal-free, redox-neutral, and visible light-triggered coupling of CO2 with epoxides to cyclic carbonates at atmospheric pressure

“…22 Elgohary et al reported the use of TiO 2 bound multiwall carbon nanotubes (MWCNT) doped with Pt or Pd nanoparticles as visible light active photocatalysts for the chemical fixation of CO 2 to cyclic carbonates. 23 However, the reported methods suffer from the drawbacks of using toxic and costly metallic or photocatalysts involving multi-step and cumbersome synthetic procedures.…”

Lead-Decorated Titanium Oxide Compound with a High Performance in Catalytic CO2 Insertion to Epoxides

“…On the basis of the preceding results and discussion, as well as the literature reports, ,− a plausible mechanism for the 1 -catalyzed cycloaddition reaction of CO 2 to an epoxide is shown in Scheme . Because 1 or TBAB cannot catalyze the reaction proficiently on their own, their coparticipation could be clearly established.…”

Palladium‐Modified TiO2/MWCNTs for Efficient Carbon Capture and Photocatalytic Reduction of Nitro‐aromatic Derivatives

“…This can be attributed to their low concentrations, low diffraction peak intensities, or their peaks became thinner after composite formation, causing the noticed displacements in peak positions, overlapping with TiO 2 major peaks, or peak masking. [21,27] Bhardwaj reported that the good dispersion and strong heterojunction creation between the nanocomposite constituents can be the reason for absence of intensive characteristic diffraction peaks for metals after deposition. [32] However, very small, low intensity and weak 200), (220), and (311) planes of Ag, respectively.…”

“…Further, these results are in good matching with the measured S BET of 55.80, 33.10, and 47.80 m 2 /g for the treated TiO 2 P25, AgÀ P25, and PdÀ P25 nanocomposites; respectively. [21]…”

“…As a result, many improvements are still required to develop more stable, non‐toxic, higher efficiency, and visible regions active photocatalysts [21] . Herein in this study, the visible‐light responsive metal loaded on modified TiO 2 /MWCNT (metal=Ag or Pd) photocatalysts had been applied as detoxification/transformation catalyst that aimed to promote photo‐oxidation of CO reaction/photo‐reduction of para‐nitrophenol reactions afforded para‐aminophenol (PAP) and formic acid (HCOOH) as high valued products.…”