Flower-like Ag₂WO₄/CeO₂ heterojunctions with oxygen vacancies and expedited charge carrier separation boost the photocatalytic degradation of dyes and drugs

Abstract

Charge carrier separation is a very important factor in photocatalysis, and it may be achieved through a variety of paths including the construction of heterojunctions and the formation of surface...

Synthesis of novel solid scale inhibitors based on silver tungstate loaded KIT-6 for scale removal from produced water: static and modeling evaluation

“…6d, where the peaks at 34.7 eV and 36.7 eV are ascribed to W 4f 7/2 and W 4f 5/2 , respectively, which belong to the W( iv ) of WO 4 −2 . 48,49 Fig. 6e demonstrates the peak of the O 1s binding energy at 530.1 eV, which is ascribed to the O 2 − of Ag 2 WO 4 , 49 while the peak at 532.8 eV is due to the Si–O–Si bond in KIT-6 silica.…”

Ag2WO4 as a multifunctional material: Fundamentals and progress of an extraordinarily versatile semiconductor

“…Hence, it is necessary to tune this characteristic to enhance efficiency in diverse applications, and the oxide/Ag 2 WO 4 composite has been used for this purpose. Composite systems with simple oxides such as Ag/ (ZnO, [205], MnWO 4 /Ag 2 WO 4 [206], Ag 2 WO 4 /CeO 2 [207], a-Ag 2 WO 4 /Ag 3 PO 4 [208], CoOeAg 2 WO 4 [209,210], ZnBi 2 O 4 /Ag 2 WO 4 ) [211], and Ag 2 WO 4 /(TiO 2 ,ZnO)/AgX (X ¼ Cl, Br, I) [187e189] have been obtained for diverse synthetic routes. These last three heterojunctions have been described in the present work in the section on composites with Ag 2 WO 4 crystals and halogenbased materials.…”

“…In terms of the successful heterojunction design, several aspects must be taken into consideration according to the suitable bands (VB and CB) alignment of the adjacent semiconductors [225,226]. In particular, for the Ag 2 WO 4 composites, the Z-scheme heterojunction [154e156, 167,185,199, 227e230] and conventional type II heterojunction [169,205,207,211,213,224] are the most employed. A schematic representation of both types of Ag 2 WO 4 heterojunctions is displayed in Fig.…”