Ultrafast electron transfer at the In2O3/Nb2O5 S-scheme interface for CO2 photoreduction

Abstract

Constructing S-scheme heterojunctions proves proficient in achieving the spatial separation of potent photogenerated charge carriers for their participation in photoreactions. Nonetheless, the restricted contact areas between two phases within S-scheme heterostructures lead to inefficient interfacial charge transport, resulting in low photocatalytic efficiency from a kinetic perspective. Here, In2O3/Nb2O5 S-scheme heterojunctions are fabricated through a straightforward one-step electrospinning technique, enabling intimate contact between the two phases and thereby fostering ultrafast interfacial electron transfer (<10 ps), as analyzed via femtosecond transient absorption spectroscopy. As a result, powerful photo-electrons and holes accumulate in the Nb2O5 conduction band and In2O3 valence band, respectively, exhibiting extended long lifetimes and facilitating their involvement in subsequent photoreactions. Combined with the efficient chemisorption and activation of stable CO2 on the Nb2O5, the resulting In2O3/Nb2O5 hybrid nanofibers demonstrate improved photocatalytic performance for CO2 conversion.

In2O3/NC/Au NPs Nanocomposites for the Electrochemical Detection of Skeletonema costatum

“…An electrochemical DNA biosensor is widely regarded as a precise, quick, inexpensive, and miniaturized technology, making it more suitable for on-site detection. − Such systems incorporate DNA probes as biorecognition elements for specific detection and quantification of targets designed by the Watson–Crick pairing principle. − Nanomaterials are often used as electrode materials to increase probe loading, accelerate the rate of electron transfer at the electrode surface, and thereby improve the sensitivity of electrochemical DNA biosensors. In 2 O 3 is a new semiconductor nanomaterial that has attracted attention for its low resistivity, high mobility, and good chemical stability. − N-doped carbon (NC) can effectively enhance the electron transfer efficiency of metal oxides . The resulting nanocomposites have good mechanical properties, a large specific surface area, and excellent electronic conductivity .…”