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A 2D/0D Bi12O17Cl2/AgBr Z-scheme photocatalyst provides a jointed synchronous pathway for simultaneous Cr(vi) and TC removal.

To improve the performances of sulfonated poly (arylene ether nitrile) (SPEN)–based proton exchange membranes (PEMs) in direct methanol fuel cells (DMFCs), the copper phthalocyanine grafted graphene oxide (CP-GO) was successfully prepared via in situ polymerization and subsequently incorporated into SPEN as filler to fabricate a series of SPEN/CP-GO-X (X represents for the mass ratio of CP-GO) composite membranes. The water absorption, swelling ratio, mechanical properties, proton conductivity, and methanol permeability of the membranes were systematically studied. CP-GO possesses good dispersion and compatibility with SPEN matrix, which is propitious to the formation of strong interfacial interactions with the SPEN, so as to provide more efficient transport channels for proton transfer in the composite membranes and significantly improve the proton conductivity of the membranes. Besides, the strong π–π conjugation interactions between CP-GO and SPEN matrix can make the composite membranes more compact, blocking the methanol transfer in the membranes, and significantly reducing the methanol permeability. Consequently, the SPEN/CP-GO-1 composite membrane displayed outstanding tensile strength (58 MPa at 100% RH and 25°C), excellent proton conductivity (0.178 S cm−1 at 60°C), and superior selectivity (5.552 × 105 S·cm−3·s). This study proposed a new method and strategy for the preparation of high performance PEMs.

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The corrosion of metal materials greatly affects the life of the equipment. Focusing on four typical environmental conditions, this paper takes steel material as the research object and analyzes the influence of factors (temperature, humidity, SO2, Cl− and others) on the corrosion rate of steel materials, as well as the weight loss and morphology. The results show that the atmospheric corrosion rate is 5.88-30.78 μm/A, and increases by 185% on average with the increase of Cl− concentration under road salt conditions. The static and dynamic corrosion rates show a three-step distribution. The concentration of chemical media in the liquid film accumulates, and the synergistic corrosion of multiple factors makes the corrosion rate much higher than the atmospheric corrosion intensity. The maximum corrosion rate under the static condition is the low latitude coastal condition (386 μm/a), and the dynamic working condition is the high latitude coastal working condition (85.6 μm/a).