Enhanced active oxidative species generation over Fe-doped defective TiO₂ nanosheets for boosted photodegradation

Abstract

Defect-rich ultrathin TiO2 nanosheets with tunable Fe doping realize the efficient generation of active oxidative species for boosted dye/antibiotic photodegradation.

Enhanced photocatalytic activity of TiO2/UiO-67 under visible-light for aflatoxin B1 degradation

“…The slopes of all samples are positive in Mott–Schottky, indicating TiO 2 and UiO-67 are typical n-type semiconductor. 30,44 Besides that, the flat band position of TiO 2 and UiO-67 is corresponding to −0.50 V and −0.43 V vs. NHE, respectively (Fig. S8a and b†).…”

“…In this study, the different scavenger reagents including t -BuOH, EDTA and BQ as ˙OH, h + and ˙O 2 − scavengers were used to identify the main active radicals during the photocatalytic reaction. 40,44,46 It is shown that the photocatalytic degradation efficiency of T-10%U composite decreased from 98.8% to 16.03%, 76.97% and 30.52% after EDTA, t -BuOH, BQ added under 2 h visible light illumination (Fig. 4f).…”

Mesoporous TiO2 and Fe-containing TiO2 prepared by solution combustion synthesis as catalysts for the photodegradation of paracetamol

“…4 d reports the deconvolution of Fe 2p spectra for Fe/TiO 2 _SCS and Fe/TiO 2 _HT. Both samples exhibited peaks associated with the presence of Fe 2+ and Fe 3+ species at a binding energy of 709.0 eV and 711.3 eV for Fe/TiO 2 _SCS and 708.8 eV and 712.6 eV for Fe/TiO 2 _HT (Freyria et al 2017 ; Hou et al 2019 ; Gao et al 2020 ; Huang et al 2023 ). The satellite at 717 eV further confirmed the presence of Fe 3+ and Fe–O–Ti in the structure (Bharti et al 2016 ).…”

Effect of Ag Modification on the Structure and Photocatalytic Performance of TiO2/Muscovite Composites

“…To determine the active species in the photodegradation process of 1-ATM, active species inhibition experiments were carried out on strong oxidizing groups such as h + , ·O 2 − and ·OH, and the results are as shown in Figure 13 . Based on the RhB degradation system, 2 mL of p-benzoquinone (BQ, ·O 2 − trapping agent), isopropyl alcohol (IPA, ·OH trapping agent) or ammonium oxalate (AO, h + trapping agent) was added to determine the active substances [ 57 , 58 , 59 ]. The degradation degrees of RhB are BQ (40.2%) < AO (62.9%) < IPA (67.9%) < no scavenger (90.6%), which indicates that ·O 2 − is the main active group, while ·OH and h + are secondary groups.…”