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The tetrafluoroterephthalonitrile cross-linked β-cyclodextrin was first subjected to the carboxylation reaction, followed by the deposition of the Fe3O4 nanoparticles on its surface to obtain the novel magnetic Fe3O4 nanoparticle/β-cyclodextrin-based polymer composites (CDP-Fes). The successful preparation of the CDP-Fes was confirmed by scanning electron microscopy, transmission electron microscopy, two-dimensional EDS mapping, zeta potential measurement, vibrating sample magnetometry, wide-angle X-ray diffraction, thermogravimetric analysis, Brunauer–Emmett–Teller surface area analysis, and Fourier transform infrared spectroscopy. The adsorption behaviors of one of the CDP-Fesnamely, 0.6FeCT-0.96β-CDfor the Methylene Blue (MB) dye were investigated in detail. The 0.6FeCT-0.96β-CD not only possessed a high adsorption capacity of 565 mg/g for the MB but also exhibited several advantages, such as the magnetic recycling ability with quick response, the reusing ability, and the selective adsorption ability. Furthermore, it was found that the pH value of the MB solution could influence the adsorption capacity of the 0.6FeCT-0.96β-CD, and the MB adsorption process of the 0.6FeCT-0.96β-CD obeyed the Langmuir model and the pseudo-second-order model.

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A superhydrophobic surface with ultra low water adhesive force is fabricated on various metals for enhanced corrosion protection.

Oil–water emulsions stabilized by surfactants are fine dispersions of oil in water or of water in oil and difficult to separate which will lead to serious water pollution. A more recent development is the ability to fabricate oleophobic–hydrophilic surfaces in air, which are not easy to construct due to the difference surface tension between water and oil. Herein, a cellulose sponge with multipore structure is fabricated to increase the removal efficiency. Amphiphilic molecular brushes of polyethylene glycol with short perfluorinated end caps (F‐PEG) are grafted on cellulose sponges to solve the contradictory relation of hydrophilicity and oleophobicity and improve oil/water selective wettability and fouling resistance. Besides, stable superhydrophilicity and superoleophobicity under water, corrosive liquids, and high oleophobicity in air conditions are exhibited in the F‐PEG grafted porous cellulose sponges with textured surfaces (F‐g‐CS). And the separation efficiency and rate of F‐g‐CS with surface of nanopores are 99.92% and 180 L m−2 h−1, while that of micropores are 99.83% and 297 L m−2 h−1 only under gravity. It is demonstrated that the grafting F‐PEG molecules imparted F‐g‐CS of micropores surface with high flux and separation efficiency simultaneously. Furthermore, antifouling property and collection of water in oil–water mixture without fouling are possessed in F‐g‐CS.

A new fluorescent probe LXY based on the rhodamine 6G platforms has been designed, synthesized, and characterized, which could recognize Fe3+ effectively in HEPES buffer (10 mM, pH = 7.4)/CH3CN (2:3, v/v). And the distinct color change and the rapid emergence of fluorescence emission at 550 nm achieved “naked eye” detection of Fe3+. The interaction mode between them was achieved by Job’s plot, MS, SEM, and X-ray single-crystal diffraction. Importantly, the crystal structures proved that Fe3+ could induce the rhodamine moiety transform the closed-cycle form to the open-cycle form. But it is interesting that Fe3+ did not appear in the crystal structures. Meanwhile, the limit of detection (LOD) of LXY to Fe3+ was calculated to be 3.47 × 10–9. In addition, the RGB experiment, test papers, and silica gel plates all indicated that the probe LXY could be used to distinguish Fe3+ quantitatively and qualitatively on-site. Moreover, the probe LXY has also been successfully applied to Fe3+ image in Caenorhabditis elegans, adult mice, and plant tissues. Thus, LXY was considered to have some potential for application in bioimaging.

Semiconductor photocatalysts play a major role in photocatalytic process. Zinc oxide (ZnO) is supposed to be a preferred photocatalyst due to its high photosensitivity, mechanical-thermal stability, tunable morphology and non-toxicity. To enhance the photocatalytic activity of ZnO, cellulose/ZnO composite films (CZ films) with snowflake-like ZnO micro/nanoparticles immobilized in cellulose matrix were prepared by a simple dissolution and regeneration of cellulose and subsequently one-step hydrothermal synthesis of ZnO. The immobilization of ZnO was conducive to overcoming the shortcomings of aggregation easily and reclamation difficulty of scattered nanopowders. The obtained CZ films exhibited excellent photocatalytic efficiency (85.3%) to degrade methylene blue with minor amount of ZnO photocatalyst (\6 mg). The experimental results show that a photocatalytic process involving absorptiondegradation-desorption was proposed. Notably, the synergistic effects between cellulose film and the supported ZnO via absorption and desorption processes were important to enhance the photocatalytic efficiency. This work provided an effective method to support ZnO photocatalyst and improve the photocatalytic efficiency via a functional substrate.Mengya Xu and He Wang have contributed equally.