Facile synthesis of hierarchical double-shell WO3 microspheres with enhanced photocatalytic activity

Tungsten oxide-based visible light-driven photocatalysts: crystal and electronic structures and strategies for photocatalytic efficiency enhancement

“…11. These morphologies can be classified into zerodimensional (0D, e.g., spherical and pseudo-spherical NPs 102,[126][127][128] ), one-dimensional (1D, e.g., nanorods, 120 nanowires, 114 nanobelts, 129 nanofibers 130,131 and nanotubes 23 ), two-dimensional (2D, e.g., nanoplatelets, 132 nanoplates 48 and nanosheets 133 ) and three-dimensional (3D, e.g., porous interconnected structures, 134,135 core-shell structures [136][137][138][139] and hierarchical structures assembled by low-dimensional building blocks 46,51,[140][141][142][143][144] ) according to the dimensionality. A schematic illustration of simplified structures in different dimensionalities is demonstrated in Fig.…”

“…In the literature, many strategies have been developed to improve the photocatalytic behaviour of WO X , such as the controls in the crystal phase, [41][42][43] stoichiometry/oxygenvacancy, 38,44,45 active facet [46][47][48] and morphology, [49][50][51] elemental doping, [52][53][54] loading of noble metal nanoparticles (NPs), [55][56][57] hybridization with carbon materials [58][59][60] and coupling with other semiconductors to construct heterojunctions. [61][62][63] According to the basic PC processes (Fig.…”

Ligand-induced synthesis of two Cu-based coordination polymers and derivation of carbon-coated metal oxide heterojunctions for enhanced photocatalytic degradation

“…4f) situated at the binding energies of 35.4 and 37.6 eV were attributed to W 4f 7/2 and W 4f 5/2 , respectively, which are characteristic of the W( vi ) species. 37…”

Investigation on the Mechanism and Inner Impetus of Photogenerated Charge Transfer in WO3/ZnO Heterojunction Photocatalysts

“…Instead, a band–band transfer will occur. , It is known that ZnO is an excellent catalyst with excellent performance in both photocatalysis and thermal catalysis because of its high stability and reducibility. ,, The narrower band gap of semiconductor WO 3 is about 2.4–2.8 eV, which can strongly absorb the solar spectrum. At the same time, it has nontoxicity, stable physicochemical properties, and excellent photoresistance. ,− The CB (−0.32 eV) and VB (2.88 eV) of ZnO and the CB (0.80 eV) and VB (3.40 eV) WO 3 have been well known. Theoretically, when the two semiconductors are combined, a good heterojunction photocatalyst will be produced, which will effectively promote the separation of photogenerated e – and h + and further greatly enhance the photocatalytic performance. − However, the effect of the mass percent of WO 3 and ZnO on photocatalytic activity of the WO 3 /ZnO composite samples was not reasonably explained, and the transfer mechanism of photoinduced carriers on WO 3 /ZnO composite samples has not been extensively investigated.…”