A good method of synthesizing Ti3C2Tx (MXene) is critical for ensuring its success in practical applications, e.g., electromagnetic interference shielding, electrochemical energy storage, catalysis, sensors, and biomedicine. The main concerns focus on the moderation of the approach, yield, and product quality. Herein, a modified approach, organic solvent-assisted intercalation and collection, was developed to prepare Ti3C2Tx flakes. The new approach simultaneously solves all the concerns, featuring a low requirement for facility (centrifugation speed < 4000 rpm in whole process), gram-level preparation with remarkable yield (46.3%), a good electrical conductivity (8672 S cm−1), an outstanding capacitive performance (352 F g−1), and easy control over the dimension of Ti3C2Tx flakes (0.47–4.60 μm2). This approach not only gives a superb example for the synthesis of other MXene materials in laboratory, but sheds new light for the future mass production of Ti3C2Tx MXene.

Steel, aluminium and magnesium are important engineering materials owing to their excellent mechanical properties. However, their applications are limited due to inadequate corrosion resistance. Various coatings and improvement technologies are used to enhance the corrosion resistance in industry and consumer products. Fabrication of hydrophobic surfaces is a very interesting approach to anticorrosion in that it is derived from the superhydrophobicity found in nature. This paper is a general review of the methods to construct a superhydrophobic surface, i.e. a thin coating layer, on various metallic materials surfaces to enhance their anticorrosion property, providing an introduction of the superhydrophobicity, including theory, properties and fabricating methods. Different methods including spray technique, laser ablation, electrochemical deposition, micro-arc oxidation and etching routes were discussed.

This technical note reports on relative differences in the physical and chemical nature of the surface films formed on AM60B during anodic polarization in an aqueous saline solution. Cross sections of the films prepared by focused ion beam (FIB) milling were analyzed using scanning electron microscopy coupled with energy-dispersive spectroscopy (SEM-EDS). The apparent breakdown potential (E b ) observed in the potentiodynamic anodic polarization curve is clearly associated with the onset of an accelerated form of localized corrosion. SEM-EDS analysis of FIB-sectioned surface films revealed that this accelerated form of localized corrosion coincides with a drastic change in the physical and chemical nature of films formed. The major physical change involves the transformation from a compact thin film to a much thicker film with significant porosity and cracking. The major chemical change involves the significant incorporation of Clinto the much thicker, significantly porous, and cracked film.

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A fundamental investigation on the removal of uranium from aqueous solutions by wheat straw was conducted in batch conditions. The influence of different experimental parameters such as modified methods, pH, contact time, adsorbent dose, initial concentration, and temperature, on the kinetics of uranium removal was studied. The results showed that the higher adsorption rate of uranium on wheat straw was modified by NaOH. At 303 K and pH was 3.0, the saturation adsorption was up to 1.20 mg/g at approximately 120 min. The uranium uptake was quantitatively evaluated using sorption isotherms and the correlation coefficients showed that the Freundlich model gave a better fit than the Langmuir equation. The process followed a pseudo‐second‐order kinetics. Scanning electron microscope coupled with Fourier transform infrared analysis for wheat straw, demonstrated that uranium‐containing sites existed on the surface structure with hydroxyl, carbonyl, PO and SiO groups. © 2011 American Institute of Chemical Engineers Environ Prog, 2011

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