Microwave-assisted synthesis of defective tungsten trioxide for photocatalytic bacterial inactivation: Role of the oxygen vacancy

Oxygen Vacant Semiconductor Photocatalysts

“…[84] The oxygen vacant WO 3-x nanosheets were synthesized via a microwave-assisted route, which were demonstrated to largely promote photocatalytic bacterial inactivation efficiency in comparison with pristine WO 3 . [85] The introduction of OVs not only increased the interfacial charge transfer efficiency of WO 3 , but also tuned its band structure, leading to the relatively strong oxidation capability of photogenerated holes.…”

Significantly enhanced supercapacitor performance of W3Nb14O44 by introducing serine and histidine-functionalized and boron-doped graphene quantum dots

“…The prominent resonance line of the paramagnetic phase in the EPR absorption spectrum for W 3 Nb 14 O 44 -SHB-GQD/BC confirms that there are more W 5+ /W 4+ /Nb 4+ species in the W 3 Nb 14 O 44 -SHB-GQD/BC, which further verifies the existence of oxygen vacancies. 28,29 Although numerous oxygen vacancies were produced in W 3 Nb 14 O 44 -SHB-GQD/BC, the W 3 Nb 14 O 44 nanocrystal phases were not obviously altered, as indicated by the XRD results shown in Fig. 4A.…”

Rich-O-Vacancy WO3/ZrO2–Hβ with High Lewis/Brønsted Ratio: An Efficient Catalyst for the Highly Selective Synthesis of Dipropylene Glycol

“…The O 1s B.E. (shown in Figure d) were detected at 530.3, 531.3, and 532.4 eV and assigned to the lattice oxygen ( O L ), absorbed oxygen ( O ads ), and surface-adsorbed H 2 O molecules, CO 2– 3 or hydroxyl (−OH) groups (O others ), respectively. − Gas-phase O 2 can be absorbed by surface O-vacancies during O-vacancy formation, regenerating surface oxygen atoms. , Therefore, the O-vacancy is closely related to the surface absorbed oxygen species ( O ads ). , The molar ratios of O ads / O total (listed in Table ) increased from 7.52% to 48.83% as the loading of WO 3 increased from 0 to 30 wt %. The molar ratios of the corresponding O ads / O total decreased slightly with the loading of WO 3 further increasing to 35 wt %.…”