Sn⁴⁺ and S²⁻ co-doped N–TiO_2−x nanoparticles for efficient and photocatalytic removal of contaminants

Abstract

<p>N–TiO_2−x nanoparticles (NPs) were selected as a basic construction unit because there are many Ti³⁺ and O vacancies on its surface.</p>

Z‐scheme 3 D g‐C3N4/TiO2−x Heterojunctions with High Photocatalytic Efficiency

“…C 3 N 4 exhibited the excellent visible light absorption with the band gap of 2.62 eV, respectively, which were close to the values in the previous literature. [43,44] Compared to TiO 2À x , the absorption edges of 3D g-C 3 N 4 /TiO 2À x red-shift from UV to visible-light region owing to introduction of 3D g-C 3 N 4 . The band gap of 3D g-C 3 N 4 /TiO 2À x was about 2.78 eV, reduced 0.35 eV for the combining with 3D g-C 3 N 4 .…”

Synergy of Photo- and Photothermal-catalytic Synthesis of Methyl Propionate from Ethylene and Carbon Dioxide over B–TiO2/Ru

“…First, the structures of TiO and Ti 2p 1/2 from Ti 4+ in the TiO 2 lattice, respectively. 26 As for the O 1s spectra (Figure 1B), two peaks located at 529.75 and 531.10 eV are ascribed to the lattice oxygen (O L ) and hydroxyl groups adsorbed onto the TiO 2 (O s ). 27 While the formation of B−TiO 2 at 350 °C occurred, two other peaks at 458.05 and 463.2 eV attributed to Ti 2p 3/2 and Ti 2p 1/2 from Ti 3+ and the peak at 530.50 eV related to the oxygen vacancy (O v ) were noticed, revealing that Ti 3+ and O v were generated on its surface during the hydrogen reduction process.…”

“…The peaks at 458.5 and 529.8 eV are ascribed to Ti 2p and O 1s spectra, respectively. For high-resolution XPS spectra of Ti 2p (Figure1A), two peaks at 458.45 and 464.15 eV correspond to Ti 2p 3/2 and Ti 2p 1/2 from Ti 4+ in the TiO 2 lattice, respectively 26. As for the O 1s spectra (Figure1B), two peaks located at 529.75 and 531.10 eV are ascribed to the lattice oxygen (O L ) and hydroxyl groups adsorbed onto the TiO 2 (O s ) 27.…”

Oxygen vacancies enhance the photocatalytic deep oxidation of NO over an N-doped KNbO3 catalyst

“…It may be that the introduction of too much non-metallic element N led to the formation of more defect energy levels in the sample, which acted as the recombination center of photogenerated carriers to prevent the transfer of electron–hole pairs to the reaction molecules, thereby inhibiting the photocatalytic NO oxidation performance. 38…”

“…It may be that the introduction of too much non-metallic element N led to the formation of more defect energy levels in the sample, which acted as the recombination center of photogenerated carriers to prevent the transfer of electronhole pairs to the reaction molecules, thereby inhibiting the photocatalytic NO oxidation performance. 38 In order to further explore the selectivity of the samples, the target products (NO 2 − and NO 3 − ) were detected by ion chromatography (Table S4 in ESI † 8). As shown in Fig.…”