Figure - available from: Journal of Materials Science: Materials in Electronics
This content is subject to copyright. Terms and conditions apply.
Source publication
Bi2WO6 nanofibers were synthesized by an electrospinning process. The phase, microstructure and photocatalytic performance of the obtained Bi2WO6 photocatalysts were investigated. The XRD patterns and FTIR spectrum suggest that Bi2WO6 nanofibers have the orthorhombic phase. The SEM and TEM images show that Bi2WO6 nanofibers have a rough surface and...
Similar publications
In optics fabrication technologies such as computer controlled optical surfacing (CCOS), accurate computation of the dwell time map plays an essential role in the deterministic performance of the fabrication process. However, it is still difficult for existing methods to derive smooth dwell time maps that reduce dynamic stressing on the machine esp...
The difficulty of establishing a common membership degree is not because there is a margin of error or some possibility distribution values, but because there is a set of possible values. Based on hesitant fuzzy sets and soft sets, a hesitant soft fuzzy rough set model is proposed in this paper. Basic properties of hesitant soft fuzzy rough sets ar...
The interaction of disturbance modes behind an isolated cylindrical roughness element in a laminar boundary layer is investigated by means of hot-film anemometry and particle image velocimetry in a low-turbulence laminar water channel. Both sinuous and varicose disturbance modes are found in the wake of a roughness with unit aspect ratio (diameter/...
Effect of satellite pointing accuracy on spaceborne video SAR imaging quality has been studied in this paper to solve the problem of indicators decomposition. First, the effect model of pointing error on the single frame image quality was established based on the rough and precise imaging. Then the relationship between the stability of Video SAR an...
Wear resistance of metallic materials can be effectively improved by the deep cryogenic treatment. In this study, different deep cryogenic treatment conditions were considered, with different soaking durations between quenching and tempering. The main objective is investigating the effects of deep cryogenic treatment and exploring the relationship...
Citations
... An XRD analysis ( Fig. 1) was performed to explore the phase composition, crystal structure, and crystal purity of BW, Sq, and BWSq. [67]. The XRD analysis revealed that the diffraction peaks of SnO 2 quantum dots (Sq) have a lower intensity with discernible peaks at the (110), (101), (211), and (112) crystallographic planes, which can be indexed to tetragonal SnO 2 , corresponding to JCPDF file No:77-0452. ...
... The surface characteristics of photocatalysts have been investigated utilizing FTIR (Figure 7). The peak that appears at 3425 cm −1 indicates the stretching and bending of the O-H group in the H2O molecules that are adsorbed onto the photocatalysts' surface [60,61]. This is consistent with the findings of other researchers [62]. ...
... This implies that The surface characteristics of photocatalysts have been investigated utilizing FTIR (Figure 7). The peak that appears at 3425 cm −1 indicates the stretching and bending of the O-H group in the H 2 O molecules that are adsorbed onto the photocatalysts' surface [60,61]. This is consistent with the findings of other researchers [62]. ...
... O-H group in the H2O molecules that are adsorbed onto the photocatalysts' su [60,61]. This is consistent with the findings of other researchers [62]. ...
The photoreduction of CO2 to other products containing carbon through simulated photosynthesis is a promising area of research. However, given the complexity of the CO2 photocatalytic reduction reaction, it is crucial to adjust the structure of the photocatalysts. The focus of this study was on creating NaOH-modified Bi2WO6 nanosheet photocatalysts via a one-step hydrothermal route and using them to convert CO2 into CO through photocatalytic reduction under the condition of not using an electron sacrifice agent. The results of characterizations and activity data showed that adding an appropriate amount of NaOH significantly improved the photoreduction activity of CO2, as seen in the BWO-2 catalyst. The efficiency of photocatalysts could be improved by tuning the band structure through the addition of an appropriate amount of alkali. This adjustment improves the separation of photogenerated carriers and controls the concentration of oxygen vacancy to reduce recombination. As a result, the photocurrent activity is highly enhanced, leading to better reduction performance compared to unmodified photocatalysts. In experiments, the CO yield of the modified photocatalyst BWO-2 remained above 90 μmol/g after four trials, indicating its effectiveness in reducing CO2. This study offers insights into the regulation of band structure in bismuth-based photocatalysts for efficient CO2 reduction.
... For the investigation of stability, the photocatalyst after PODS was separated from the reaction mixture by the centrifugation, washed with ethanol and distilled water, dried at 80 • C for 12 h, and then directly used for the next run. [23,24], respectively. No other diffraction peaks were detected, indicating the high purity of the sample. ...
... For the investigation of stability, the photocatalyst after PODS was separated from the reaction mixture by the centrifugation, washed with ethanol and distilled water, dried at 80 °C for 12 h, and then directly used for the next run. [23,24], respectively. No other diffraction peaks were detected, indicating the high purity of the sample. ...
Photocatalytic oxidative desulfurization has attracted much attention in recent years due to the continuous tightening of the sulfur content requirements in motor fuels and the disadvantages of the industrial hydrodesulfurization process. This work is devoted to the investigation of the photocatalytic activity of Bi2WxMo1−xO6 solid solutions (x = 1, 0.75, 0.5, 0.25, 0) in the oxidative desulfurization of hydrocarbons under visible light irradiation using hydrogen peroxide as an oxidant. The synthesized photocatalysts were characterized in detail using XRD, SEM, EDS, low-temperature nitrogen adsorption–desorption, and DRS. It was shown that the use of solid solutions Bi2WxMo1−xO6 with x = 0.5–0.75 leads to the complete oxidation of organosulfur compounds to CO2 and H2O within 120 min. The high photocatalytic activity of solid solutions (x = 0.5–0.75) is attributed to their ability to absorb more visible light, the presence of the corner-shared [Mo/WO6] octahedral layers, which may promote the generation and separation of photogenerated charges, and the hierarchical 3D flower-like structure. The reaction mechanism of the desulfurization was also analyzed in this work.
The outcomes of adhesion and ecotoxicity tests carried out on metal specimens faithfully representing the surface of real ships, including the primer and tie coat layers typically applied on ship hull prior to deposition of the antifouling paint, show the practical applicability of “AquaSun” antifouling sol-gel coatings. Newly developed AquaSun coatings share hydrophobicity (contact angle >115°) and exceptionally high scratch resistance (ASTM 5B). Coupled to the ecofriendly antifouling mechanism based on continuous H2O2 formation upon exposure to solar light and foul release due to low surface energy, these results open the route to the practical utilization of these novel marine coatings.
In this work, a series of Pr3+ doped Bi2WO6 had been successfully prepared by one-step hydrothermal method. The prepared Pr- Bi2WO6 were characterized by XRD, UV–Vis DRS, PL, SEM, TEM, XPS and N2 adsorption–desorption to study their physical–chemical properties. Rhodamine B (RhB) was photodegraded as a target organic pollutant to investigate the photocatalytic activity of the as-prepared samples. The results show that Pr doping retains the phase and morphology of Bi2WO6, enlarges the specific surface area and reduces the recombination rate of photogenerated electrons and holes, thus the removal efficiency of RhB under simulated solar irradiation was remarkably improved. The optimum molar ratio of Pr to Bi2WO6 was 1%, whose degradation efficiency of RhB reached 99.4% within 20 min. The improved photocatalytic activity can be ascribed to the optimum optical absorption activity, the larger specific surface area and the morphology of microspheres which resulted in the effective separation of the photogenerated electron hole pairs. In addition, the h+ plays a major role in the photodegradation of RhB by all Pr doped Bi2WO6 samples according to the radical-trapping experiments.
Brilliant yellow-orange pigments based on the formula of Bi1.7RE0.3W0.7Mo0.3O6 (RE = Y, Yb, Gd, Lu) is developed by the traditional solid-state reaction method. Relevant techniques were used for the characterizations of crystal structure, morphology feature, reflectance property and color performance of prepared pigment. The doping of RE/Mo in Bi2WO6 results in the color of pigment varying from faint yellow to brilliant yellow-orange. Compared with Bi2WO6 pigment, the typical pigment of Bi1.7Lu0.3W0.7Mo0.3O6 greatly improves the yellow hue component (b*) value to be 72.03. Moreover, the NIR reflectances of all the samples are higher than 95% as well as their NIR solar reflectances are above 94%. The typical pigment of Bi1.7Lu0.3W0.7Mo0.3O6 coated on galvanized sheet exhibits excellent coloring performance with a high NIR solar reflectance (83.32%). The acid/alkali resistance studies reveal that the pigments are chemically stable under the atrocious weather conditions. Thus, the superior performances of synthesized pigments have exhibited application potentials.
