摘要：In recent years, solar desalination and water evaporation/purification with various artificial architectures have drawn significant attention. Herein, we introduce a rational design structure for efficient solar water evaporation and purification, focusing on the balance between water transportation and thermal *** wood after a simple flame treatment on the surface was utilized as the solar absorber, with a high solar absorbance(~90 %), good hydrophilicity, and excellent heat localization abilities. Besides,a thermal insulator(polystyrene foam) was used to further reduce the thermal loss, and the optimized ratio between the water path and thermal insulator was obtained. A set of floating foam-flamed-wood(F-F-wood) devices were fabricated with a high evaporation rate of 3.92 kgm-2 h-1, exhibiting photothermal purification abilities from seawater and wastewater containing organic dyes and heavy metals. This study sheds light on the rational design of scalable and low-cost devices for solar water evaporation and purification.

摘要：Accelerated charge migration and proton transfer to the reaction site are critical factors for improving photocatalytic ***,realizing both simultaneously is challenging because of the sluggish water(proton source)oxidation kinetics and interdependent redox ***,we design an imide and hydrogen bond to connect carbon nitride ports of the D-π-A system with the dual-engineered *** system uses an acetylene functional group and an imidazole ring as spatially separated water oxidation and oxygen reduction reaction(ORR)catalytic centers for photogenerated charge separation,*** imine bond is a bridge grafted to the oxidation site to act as a hydrogen proton trap,and the hydrogen bond formed between reduction site and carbon nitride is used as the channel for instantaneous proton delivery to the reduction *** situ characterization confirms that the linking sites protonation optimizes the pathway of ORR to H_(2)O_(2) and facilitates the*OOH intermediates *** is concluded that proton transport plays a critical role in optimizing photocatalytic H_(2)O_(2) *** work provides a strategy to improve dynamic proton transfer mechanisms.

摘要：Graphitic carbon nitride(g-C_(3)N_(4))has emerged as a remarkably promising photocatalyst for addressing environmental and energy issues;however,it exhibits only moderate photocatalytic activity because of its low specific surface area and high recombination of *** of crystalline g-C_(3)N_(4) by the molten salt method has proven to be an effective method to improve the photocatalytic ***,crystalline g-C_(3)N_(4) prepared by the conventional molten salt method exhibits a less regular ***,highly crystalline g-C_(3)N_(4) hollow spheres(CCNHS)were successfully prepared by the molten salt method using cyanuric acid-melamine as a *** higher crystallization of the CCNHS samples not only repaired the structural defects at the surface of the CCNHS samples but also established a built-in electric field between heptazine-based g-C_(3)N_(4) and triazine-based g-C_(3)N_(4).The hollow structure improved the level of light energy utilization and increased the number of active sites for photocatalytic *** of the above characteristics,the as-prepared CCNHS samples simultaneously realized photocatalytic hydrogen evolution with the degradation of the plasticizer bisphenol *** research offers a new perspective on the structural optimization of supramolecular self-assembly.

摘要：某型装甲保障车的车体结构在复杂组合载荷作用下,必须同时满足强度和刚度等技术要求,有限元仿真技术为快速经济地实现这样的设计目标提供了可能.首先建立车体的三维实体有限元模型,其中对车体各部件之间复杂的接触条件和部件形状进行简化处理,给出车体结构承受的外挂部件重力,弹药发射冲击力、发动机离心力和最大输出扭矩等载荷的等效静力学表达,确定车体结构的边界约束条件.仿真计算各种载荷作用下车体结构的变形和应力分布状况,指出车体结构强度和刚度的薄弱部位,分析导致计算的最大应力超过材料屈服强度的原因,提出并仿真验证车体主要承载部件的设计改进方案.