Wetland has strong material production function, which is rich in animal and plant resources. In view of the high error in the quantitative study of vegetation distribution structure in traditional wetland ecological gardens, a quantitative analysis of vegetation distribution structure in wetland ecological gardens based on phytocoenology was proposed. The connotation of phytocoenology was expounded. Based on the theory of phytocoenology, the classification of wetland ecological garden vegetation was divided into two categories: wet vegetation and aquatic vegetation. Based on the vector data of wetland vegetation extracted by Ouickbirc satellite combined with field survey, a quantitative evaluation model of wetland ecological garden vegetation distribution structure was constructed according to the theory of phytocoenology. The experimental results show that the proposed method has low quantization error, which lays a foundation for the further development of research in this field.
Design and fabrication of highly active photocatalysts under visible light irradiation are one of hotspots in the field of photocatalysis. In this paper, mesoporous AgInO2 nanostructures have been synthesized through a combined sol-gel and ion exchange process. Thermogravimetric analysis-differential scanning calorimeter (TGA-DSC), X-ray diffraction analysis (XRD), field emission scanning electron microscopy (FESEM), N2 adsorption-desorption and ultraviolet-visible (UV-vis) analysis technologies were used to investigate the effects of preparation condition on the microstructure of the AgInO2. The photocatalytic performances have been evaluated by degradation of the formaldehyde under visible light irradiation. The results demonstrate that the mesoporous AgInO2 is a delafossite structure with the uniform size about 200~500 nm and nitrogen adsorption-desorption type IV isotherms, the absorption edge of AgInO2 lies between 500nm and 600 nm in the visible light scope. As-synthesized AgInO2 exhibits remarkably high photocatalytic activity of 93.97% in decomposing formaldehyde for 180 min. These results provide a basic experimental process for preparation novel photocatalyst of AgInO2, which will possess a broad prospect in terms of the applications in improving indoor air quality.
The development of switchable wettability membranes with high permeation fluxes is crucial for oily sewage treatment. A hierarchical beadlike porous PS fibrous membrane with pH-switchable wettability was precisely fabricated by nonsolvent-induced phase separation during electrospinning, followed by UV photografting copolymers of 2-(dimethylamino) ethyl acrylate (DMAEA) and 3,3,4,4,5,5,6,6,7,7,8,8,8-tridecafluorooctyl acrylate (TFOA). The designed unique structure notably increases the roughness of surface and enhances superwettability. Protonation of the amine groups on the fibers triggered by an acid solution (pH < 2) induces underwater superoleophobicity, which in turn causes superoleophilicity in a neutral or basic solution. The as-prepared fibrous membrane can effectively separate the hexane/water mixture with an oil flux of 10 186.8 L m–2 h–1 and a separation efficiency of 99.2% only driven by gravity. Especially, excellent separation performances (water fluxes) were also realized for other oil/water mixtures with higher viscosity by switching the wettability from superoleophilicity to hydrophilicity. Moreover, the as-prepared fibrous membrane can also be applied to a continuous T-shaped tube device delivering a high handling capacity of 6631.5 L m–2 h–1, which provides the oily sewage treatment with a facile strategy in practical application.
ZnWO4 with controllable morphology was successfully synthesized via a facile hydrothermal method. The relationships between the structure, morphology, and catalytic activity were systemically studied by varying both the hydrothermal time and pH value. The optimal synthesis conditions for ZnWO4 with superior catalytic activity were a hydrothermal time of 12 h and a pH value of 10. Impressively, the highest photocatalytic activity for the degradation of RhB was 91% for 60 min under ultraviolet light. The increased photodegradation performance was mainly ascribed to the high crystallinity and enlarged surface area of the optimal ZnWO4.
Abstract Due to the rise of the logistics industry and the widespread use of ink labels, problems such as the narrow operating temperature range of ink, poor alcohol resistance, and insufficient scratch resistance need to be solved urgently. In this work, creates alcohol‐resistant thermal transfer inks by mixing polypropylene chloride (VP‐365) and epoxidized hydrogenated bisphenol A (P) resin and incorporating them into the ink formulation. The synthetic ink has a lower glass transition temperature (118.2°C), allowing the ink to print at lower temperatures. It has small wetting angles (68°, 63°, 58°, 46°, and 40°) and a large adhesion force (10.44 – 14.4 N) for different labels. Further, to evaluate the printing performance of the ink, the ink was scratched under 1000 g pressure and in the environment of isopropyl alcohol to evaluate its printing performance. The produced ink has high scratch resistance (300 times) and good alcohol resistance (140 times). Moreover, the developed ink showed good printability, printing media versatility, high adhesion, and excellent alcohol resistance. The synthesis method is facile and cost‐effective, which paves a novel way towards high‐performance ink printing and thermal transfer technology industries.
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