No abstract

Three dimensional (3D) CeVO4/rGO porous aerogels were fabricated by a one-pot hydrothermal method.

No abstract

Cubic ZrMo 2-x V x O 8-x/2 (0 B x B 0.5) compounds, with well-defined nanorods morphology, were synthesized by a facile sol-gel process without using any surfactant or template. The resulting products were characterized by the X-ray diffraction, scanning electron microscopy, transmission electron microscopy, thermal mechanical analyzer and UV-vis diffuse reflectance spectra (UV-vis DRS). The results indicated that V-doping did not influence the crystal structure and negative thermal expansion (NTE) property, but made rods size increase. Narrowed band gap was observed in V-doped ZrMo 2 O 8 . The resultant V-doped ZrMo 2 O 8 samples, as compared with pure ZrMo 2 O 8 , exhibited improved UV-light photocatalytic activity, during the photocatalytic degradation of rhodamine B. The mechanism was supposed that the V-doping gave rise to the formation of oxygen vacancies which could enhance photocatalytic performance by reducing the recombination of electrons and holes. In addition, cubic ZrMo 2-x V x O 8-x/2 also displayed reliable recycling photocatalytic performance and satisfying UVlight catalytic activity for the organic pollutant. Furthermore, all of the resulting cubic ZrMo 2-x V x O 8-x/2 showed excellent NTE property from 25 to 450°C. Graphical Abstract TEM images of (a) pure ZrMo 2 O 8 and (b) ZrMo 1.7 V 0.3 O 7.85 ; (c) RhB degradation under UVlight illumination for 180 min in the presence of cubic ZrMo 2-x V x O 8-x/2 (x = 0, 0.1, 0.2, 0.3, 0.4 and 0.5) photocatalysts.

No abstract

Pure and Mo doped ZrW 2 O 8 compounds have been synthesised by a sol-gel process. The structure, morphology and properties of as synthesised samples have been investigated using X-ray diffraction, scanning electron microscopy, energy dispersive spectroscopy, UV-Vis spectrometer and photoluminescence. The analysis results reveal that the crystal structure, morphology, band gap and photocatalytic activity of ZrW 2 − x Mo x O8 compounds can be tuned by changing the Mo doping content. When compared with pure ZrW 2 O 8 , the substitution of Mo in different doping ratios narrows the band gap energy. The photocatalytic activity of the samples is evaluated by the degradation of rhodamine B, indicating that the photocatalytic activities of ZrW 2 − x Mo x O8 compounds depend on the Mo doping content. The incorporation of Mo dopants can modify the electronic structure of ZrW 2 O 8 and prohibit the recombination of photo-induced charge carriers. ZrWMoO 8 has the greatest photocatalytic activity, and it displays good stability during the photocatalytic and recycling processes.