Air plasma treated TiO2/MWCNT composite for enhanced photocatalytic activity

TiO2–NGQD composite photocatalysts with switchable photocurrent response

“…This suggests that the recombination rate in these composites is delayed or hindered, which has been previously attributed to Ti 3+ surface states that act to trap generated electrons. 49,50 This delay in photocurrent response was most pronounced in the 8% NGQD sample; however, no indication of Ti 3+ binding energies can be seen in the high-resolution Ti XPS scan in Fig. 4.…”

Single-Molecule Imaging of Reactive Oxygen Species on a Semiconductor Nano-Heterostructure for Understanding Photocatalytic Heterogeneity in Aqueous

“…4 Therefore, understanding •OH production during the photocatalyst process is crucial for clarifying the photocatalytic mechanism and improving the efficiency of artificial photochemical reactions. 30 The TiO 2 -MWCNT was synthesized via a calcination method 24 and was characterized using a high-resolution transmission electron microscope (HRTEM). The HRTEM images (Figure S1A) showed that TiO 2 nanoparticles were successfully loaded onto a single wire-shaped MWCNT.…”

“…In this work, the TiO 2 -MWCNT was chosen as a model semiconductor nano-heterostructure photocatalyst. , It should be noted here that TiO 2 functioned as a typical semiconductor photocatalyst, and the MWCNT behaves as an e – mediator to enhance charge carrier separation and transfer. We speculated that this design could potentially increase the photocatalytic efficiency of TiO 2 . − Under UV irradiation, TiO 2 absorbs energy and forms photogenerated e – and h + . The produced e – quickly transfers onto the MWCNT, whereas the freshly generated h + on the TiO 2 surface exhibits a strong oxidation potential.…”

“…The TiO 2 -MWCNT was synthesized via a calcination method and was characterized using a high-resolution transmission electron microscope (HRTEM). The HRTEM images (Figure S1A) showed that TiO 2 nanoparticles were successfully loaded onto a single wire-shaped MWCNT.…”