In situ construction of oxygen-vacancy-rich Bi0@Bi2WO6-x microspheres with enhanced visible light photocatalytic for NO removal

Anchoring Highly Dispersed Pt Electrocatalysts on TiOx with Strong Metal–Support Interactions via an Oxygen Vacancy-Assisted Strategy as Durable Catalysts for the Oxygen Reduction Reaction

“…As shown in Figure 2b, both of TiO 2 -V o /C and TiO x -V o -H/C exhibits a symmetric EPR signal gradient at with the g value of 2.003, which is ascribed to the electrons trapped on oxygen vacancies. 45 According to the EPR spectrum of TiO x -V o -H/C, the stronger signal intensity confirms the extra generated V o after H 2 treatment, which is favorable for the electron transfer in the electrochemical reaction. Furthermore, inductively coupled plasma optical emission spectrometry (ICP-OES) analysis shows that the Pt content in PTO-V o -H/C is 4.4 wt %, which is lower than that of PTO-V o /C (6.2 wt %) and PTO/C (10.1 wt %) (Table S1).…”

Photo-Fenton Process over an Fe-Free 3%-CuO/Sr0.76Ce0.16WO4 Photocatalyst under Simulated Sunlight

“…20 In our experiment, the characteristic peak of SrWO 4 is at 834.2 nm −1 , which originates from the stretching mode of O−W−O in the [WO 4 ] tetrahedron. 19,21 The peak (941.8 nm −1 ) highlighted by the yellow rectangle shows the change after doping with Ce, which can help to indicate that Ce was successfully doped into the SrWO 4 sample. The higher the content of Ce, the more obvious this small peak is, and the characteristic peak with a wavenumber of 834.2 nm −1 also appears to be a significant broadening phenomenon (see Figure S1a).…”

“…The chemical valences of Sr 2+ , Ce 3+ , and W 6+ were identified. The 1s band spectra of oxygen are ∼529.7 and ∼533.4 eV, generally considered surface lattice oxygen and chemisorbed oxygen, respectively. ,− The O 1s bands of Figure f are distributed at ∼530.6 eV, a mixture of surface lattice oxygen and chemisorbed oxygen. The chemisorbed oxygen was dramatically increased by the influence of the CuO compound, which is different from the Au-loaded Sr 0.76 Ce 0.16 WO 4 sample (see Figure S2 and Table S1).…”

Coral-Shaped TiO2−δ Decorated with Carbon Quantum Dots and Carbon Nanotubes for NO Removal

“…CNTs have also been used as cocatalysts for metal oxide semiconductor (MOS) photocatalysts and are considered to be a coadsorbent or support for the adsorption and photocatalytic degradation of organic pollutants because of their excellent electrical conductivity, large electron storage capacity, and tunable surface chemistry . Particularly, the modification of functional groups on the surface of the CNTs can further improve the adsorption capacity of the CNTs for various pollutants . In addition, the CNTs in the CNTs/MOS composite photocatalysts can also act as photoexcited electron acceptors to provide a channel for charge transfer due to the formation of ohmic contact, inhibiting the recombination of photogenerated charge carriers. − A large number of studies have already confirmed that the CNTs/MOS can exhibit an excellent photocatalytic performance in the degradation of organic pollutants and NO removal, such as CNTs/C 3 N 4 , Au/CNTs/TiO 2 , CNTs/Ag 3 PO 4 , CNTs/Ag/AgBr, etc.…”

“…Particularly, the modification of functional groups on the surface of the CNTs can further improve the adsorption capacity of the CNTs for various pollutants . In addition, the CNTs in the CNTs/MOS composite photocatalysts can also act as photoexcited electron acceptors to provide a channel for charge transfer due to the formation of ohmic contact, inhibiting the recombination of photogenerated charge carriers. − A large number of studies have already confirmed that the CNTs/MOS can exhibit an excellent photocatalytic performance in the degradation of organic pollutants and NO removal, such as CNTs/C 3 N 4 , Au/CNTs/TiO 2 , CNTs/Ag 3 PO 4 , CNTs/Ag/AgBr, etc. As a zero-dimensional (0D) carbon material, carbon quantum dots (CQDs) have attracted much attention because of their superior physicochemical properties, unique light absorption, up-conversion fluorescence, electron reservoir properties, − etc.…”