Sunlight induced photo-thermal synergistic catalytic CO₂ conversion via localized surface plasmon resonance of MoO_3−x

Abstract

MoO3−x displayed dramatically enhanced photo-thermal synergistic CO2 reduction under simulate sunlight irradiation compared to MoO3 due to the LSPR of MoO3−x triggered by oxygen vacancies.

Fundamentals and applications of photo-thermal catalysis

“…This oxide was used by Li et al, tailoring it (MoO 3Àx ) with extra superficial defects (O-vacancies). 168 The introduction of O-defects extended the absorption of light permitting one to employ the whole spectrum of sunlight by means of the LSPR effect that narrowed the band gap of the material. Moreover, the increase of superficial defects improved the surface area and the available active sites, but also oxygen vacancies are responsible for decreasing the recombination of charge carriers.…”

Sustainable Nanoplasmon‐Enhanced Photoredox Reactions: Synthesis, Characterization, and Applications

“…[175] In addition, WO 3-x and MoO 3-x have also been explored as excellent photo catalysts for solar light driven reduction of carbon dioxide to fuels. [33,43] Molybdenum Trioxide (MoO 3-x ): In a recent report by Li et al, localized surface plasmon resonance of MoO 3-x originating from the surface oxygen vacancies was used to absorb photons in the NIR region, which resulted in an enhanced CO 2 reduction efficiency via a photo thermal mechanism. [43] In addition, the energy barriers involved in the reduction process were found to be significantly lower in the presence of oxygen vacancies (MoO 3-x ).…”

“…[33,43] Molybdenum Trioxide (MoO 3-x ): In a recent report by Li et al, localized surface plasmon resonance of MoO 3-x originating from the surface oxygen vacancies was used to absorb photons in the NIR region, which resulted in an enhanced CO 2 reduction efficiency via a photo thermal mechanism. [43] In addition, the energy barriers involved in the reduction process were found to be significantly lower in the presence of oxygen vacancies (MoO 3-x ). The mechanism of CO 2 reduction was deduced based on in situ FTIR measurement and theoretical calculations.…”

“…This was followed by the transformation of COOH* to CO, HCO, H 2 CO, H 3 CO, H 3 COH and CH 4 in a sequential fashion. [43] Tungsten Trioxide (WO 3-x ): Similarly, mesoporous WO 3-x catalysts were designed for the photo thermal reduction of carbon dioxide and excellent selectivity was observed towards methane formation. [33] The underlying reason behind the increased photocatalytic efficiency was ascribed to the effective separation of photogenerated charge-carriers via effective trapping of photogenerated holes by oxygen ions generated from CO 2 .…”

Photocatalytic membrane filtration and its advantages over conventional approaches in the treatment of oily wastewater: A review

“…Photothermal materials enable the extended usage of the solar spectrum compared with pure photocatalysts—which are limited by their band gap 147 . These materials are required to have high solar absorption ability and small thermal emissivity; therefore, dark‐colored heat‐absorbing materials show great potential to be used as photothermal catalysts, 148,149 such as some metal oxides due to their thermal stability (e.g., CuO and Co 3 O 4 ) 150 . Carbon‐based structures are also possible candidates to be used as photothermal catalysts due to their capability to convert light to heat, good thermal and mechanical stability, large surface area, low density, and high optical absorption rate (e.g., carbon quantum dots, graphene, and carbon nanotubes) 140,151 .…”