Roles of titania and plasmonic gold nanoparticles of different sizes in photocatalytic methane coupling at room temperature

Hu, Di; Dong, Chunyang; Belhout, Samir A.; Shetty, Shwetha; Ng, Henry; Brasseur, Paul; Bezerra, Leticia S.; Tayeb, K. Ben; Simon, Pardis; Addad, Ahmed; Virginie, Mirella; Wojcieszak, Robert; Camargo, Pedro H. C.; Khodakov, Andreï Y.

doi:10.1016/j.mtener.2023.101358

Cited by 3 publications

(1 citation statement)

References 39 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This peak becomes stronger with an increasing amount of Au (Figure S4). It arises from the surface plasmon resonance of the Au metallic NPs. − The center of the peak, around 540 nm, is consistent with the mean size of the Au NPs measured in TEM . The metallic nature of the Au NPs is also confirmed by X-ray photoemission spectroscopy (XPS), as shown in Figure S5, with a Au 4f 7/2 binding energy slightly smaller than that in pure Au foil (84.0 eV) consistent with the literature …”

Section: Resultssupporting

confidence: 86%

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

Tran,

Moreau,

Addad

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

Among semiconductor nanomaterials, titanium dioxide is at the forefront of heterogeneous photocatalysis, but its catalytic activity greatly suffers from the loss of photoexcited charge carriers through deleterious recombination processes. Here, we investigate the impact of an external electric field (EEF) applied to conventional P25 TiO 2 nanopowder with or without Au nanoparticles (NPs) to circumvent this issue. The study of two redox reactions in the gas phase, water splitting and toluene degradation, reveals an enhancement of the photocatalytic activity with rather modest electric fields of a few volt/centimeters only. Such an improvement arises from the electric-field-induced quenching of the green emission in anatase, allowing the photoexcited charge carriers to be transferred to the adsorbed reactants instead of pointless radiative recombinations. Applying an EEF across a trap-rich metal oxide material, such as TiO 2 , which, when impregnated with Au NPs, leads, respectively, to 12-and 6-fold enhancements in the production of hydrogen and the oxidation of toluene for an electric field of 8 V/cm, without any electrolysis, is a simple and elegant strategy to meet higher photocatalytic efficiencies.

show abstract

Section: Resultssupporting

confidence: 86%

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

Tran,

Moreau,

Addad

et al. 2024

ACS Appl. Mater. Interfaces

Self Cite

View full text Add to dashboard Cite

show abstract

In-situ exploration of divergent methane coupling pathways in dry and aqueous environments on silver and palladium heteropolyacid-titania photocatalysts

Wang,

Dong,

et al. 2024

Applied Catalysis B: Environment and Energy

View full text Add to dashboard Cite

Photocatalytic Aerobic Conversion of Methane

Kong,

Yang,

Cai

et al. 2023

Photocatalysis: Research and Potential

View full text Add to dashboard Cite

Roles of titania and plasmonic gold nanoparticles of different sizes in photocatalytic methane coupling at room temperature

Cited by 3 publications

References 39 publications

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

In-situ exploration of divergent methane coupling pathways in dry and aqueous environments on silver and palladium heteropolyacid-titania photocatalysts

Photocatalytic Aerobic Conversion of Methane

Contact Info

Product

Resources

About

Roles of titania and plasmonic gold nanoparticles of different sizes in photocatalytic methane coupling at room temperature

Cited by 3 publications

References 39 publications

Boosting Gas-Phase TiO2 Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

Boosting Gas-Phase TiO2 Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

In-situ exploration of divergent methane coupling pathways in dry and aqueous environments on silver and palladium heteropolyacid-titania photocatalysts

Photocatalytic Aerobic Conversion of Methane

Contact Info

Product

Resources

About

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter

Boosting Gas-Phase TiO₂ Photocatalysis with Weak Electric Field Strengths of Volt/Centimeter