摘要：Along with the explosive growth in the market of new energy electric vehicles,the demand for Li-ion batteries(LIBs)has correspondingly *** the limited life of LIBs,numbers of spent LIBs are bound to be *** of the severe threats and challenges of spent LIBs to the environment,resources,and global sustainable development,the recycling and reuse of spent LIBs have become ***,we propose a novel green and efficient direct recycling method,which realizes the concurrent reuse of LiFePO_(4)(LFP)cathode and graphite anode from spent LFP *** optimizing the proportion of LFP and graphite,a hybrid LFP/graphite(LFPG)cathode was designed for a new type of dualion battery(DIB)that can achieve co-participation in the storage of both anions and *** hybrid LFPG cathode combines the excellent stability of LFP and the high conductivity of graphite to exhibit an extraordinary electrochemical *** best compound,i.e.,LFP:graphite=3:1,with the highest reversible capacity(~130 mAhg^(-1) at 25 mAg^(-1)),high voltage platform of 4.95 V,and outstanding cycle performance,was *** specific diffusion behavior of Li^(+) and PF_(6)^(-) in the hybrid cathode was studied using electrode kinetic tests,further clarifying the working mechanism of *** study provides a new strategy toward the large-scale recycling of positive and negative electrodes of spent LIBs and establishes a precedent for designing new hybrid cathode materials for DIBs with superior performance using spent LIBs.

摘要：Owing to excellent conductivity and abundant surface terminals,MXene-based heterostructures have been intensively investigated as energy storage ***,elaborate design of the structure and composition of MXene-based hybrids towards superior electrochemical performance is still ***,we present an ingenious leaf-inspired design for preparing a unique Sb_(2)S_(3)/nitrogen-doped Ti_(3)C_(2)T_(x)MXene(L-Sb_(2)S_(3)/Ti_(3)C_(2))***-situ TEM observations reveal that the leaflike Sb_(2)S_(3)nanoparticles with numerous mesopores can well relieve the large volume changes via an inward pore filling mechanism with only 20%outward expansion,whereas highly conductive N-doped Ti_(3)C_(2)T_(x)nanosheets can serve as the robust mechanical support to reinforce the structural integrity of the *** from the structural and constituent merits,the L-Sb_(2)S_(3)/Ti_(3)C_(2)anode fabricated exhibits a fast sodium storage behavior in terms of outstanding rate capability(339.5 mA h g^(-1)at 2,000 mA g^(-1))and high reversible capacity at high current density(358.2 mA h g^(-1)at 1,000 mA g^(-1)after 100 cycles).Electrochemical kinetic tests and theoretical simulation further manifest that the boosted electrochemical performance mainly arises from such a unique leaf-like Sb_(2)S_(3)mesoporous nanostructure with abundant active sites,and enhanced Na^(+)adsorption energy on the heterojunction formed between Sb_(2)S_(3)nanoparticles and Ti_(3)C_2)matrix.

摘要：The rational design and construction of novel two-dimensional(2D)carbon nitrides(CNs)beyond g-C_(3)N_(4) is a hot topic in the fields of chemistry and *** by the polymerisation of urea,we have prepared a series of novel C-C bridged heptazine CNs UO_(x)(where x is the ratio of urea to oxamide,x=1,1.5,2,2.5,and 3),which are similar to(C_(6)N_(7))n,upon the introduction of *** predicted using density functional theory(DFT)calculations,the conjugated structure of UO_(x) was effectively extended from an individual heptazine to the entire ***,its bandgap was reduced to 2.05 eV,and its absorption band edge was significantly extended to 600 ***,its carrier transfer and separation were significantly enhanced,establishing its superior photocatalytic *** optimised UO_(2) exhibits a superior photocatalytic hydrogen production rate about 108.59 lmol h^(-1)(using 10 mg of catalyst)with an apparent quantum efficiency(AQE)of 36.12%and 0.33%at 420 and 600 nm,respectively,which is one of the most active novel CNs reported to ***,UO_(2) exhibits excellent photocatalytic activity toward the oxidation of diphenylhydrazine to azobenzene with conversion and selectivity reaching~100%,which represents a promising highly efficient 2D CN *** phenols degradation,UO_(2) also displayed significantly higher activity and durability during the degradation of phenol when compared to traditional g-C_(3)N_(4),highlighting its significant potential for application in energy,environment and photocatalytic organic reactions.

摘要：Thermoelectric(TE)devices can realize the conversion of heat energy and electrical power based on Seebeck effect and Peltier *** them,flexible TE devices have received more attention recently due to their better attachment to various heat sources and aimed components with arbitrary *** improve the performance of flexible TE devices for various application scenarios,large efforts have been made to design the leg patterns,the electrical and thermal contact issues,and the substrate and encapsulation materials for the decrease of heat *** paper is to review the advancements about the design of flexible inorganic TE devices over the last ***,the design of flexible thin-film TE devices based on the direction of temperature gradient,including the patterns of TE legs,the fabrication methods,and the flexible substrate materials is ***,the design of wearable TE devices that contains common architecture of the module,the substrates and encapsulations,the electrical and thermal contact,and some thin-film based wearable devices with curving TE legs is ***,the characterizations of the flexibility of TE devices and the current applications are ***,some views about the future development for TE devices are proposed.

摘要：DD （Dust deposition） was monitored over a 6-month period （April to September, 2011） at four sites located in villages near CADDⅡ（coal ash disposal site Divkovici Ⅱ）, one inside recultivated CADDⅠ （coal ash disposal site Divkovici Ⅰ） and at one in the middle of forest barrier as control site. The main aim of this paper is to perform monitoring of air dust pollution in the area by measuring of dust deposition, different metals associated with it, and probable adverse effects on human health. Concentrations of metals were measured by using Perkin-Elmer model Inductively Coupled Plasma and statistically evaluated with SPSS 17.0 statistical program. There was a correlation between some metals （Mn, Mo and Pb） and DD distribution. The daily limit values for concentration of DD proposed by national ＂Regulations on air quality＂ （200 mg/m^2d average annual value and 350 mg/m^2d high value） exceed at three measuring sites. The average maximum content of DD was 684.8 mg/m^2d downwind of CADDII, and the average minimum was 46.8 mg/m^2d at measuring site F. Concentrations of pollutants hazardous to the environment as Ni, Cr, Cu, Mo, Mn and Pb vary from one site to another.

摘要：Transdermal drug delivery systems have overcome many limitations of other drug administration routes,such as injection pain and first-pass metabolism following oral route,although transdermal drug delivery systems are limited to drugs with low molecular ***,new emerging technology allowing high molecular weight drug delivery across the skin—known as‘microneedles’—has been developed,which creates microchannels that facilitate drug *** this report,drug-loaded degradable conic microneedles are modeled to characterize the degradation rate and drug release *** a lot of data are available for polylactic acid-co-glycolic acid(PLGA)degradation in the literature,PLGA of various molecular weights-as a biodegradable polymer in the polyester family-is used for modeling and verification of the drug delivery in *** main reaction occurring during polyester degradation is hydrolysis of steric bonds,leading to molecular weight *** acid produced in the degradation has a catalytic effect on the *** in water,acid and steric bond concentrations over time and for different radii of microneedles are *** solve the partial and ordinary differential equations simultaneously,finite difference and Runge–Kutta methods are employed,respectively,with the aid of *** of the polymer degradation rate with its molecular weight and molecular weight changes versus time are ***,drug diffusivity is related to matrix molecular *** molecular weight reduction and accumulative drug release within the system are *** order to validate and assess the proposed model,data series of the hydrolytic degradation of aspirin(180.16 Da)-and albumin(66,000 Da)-loaded PLGA(1:1 molar ratio)are used for *** proposed model is in good agreement with experimental data from the *** diffusion as themain phenomena and autocatalytic effects in the reaction,the drug release profile i

摘要：In this study, a novel design concept for PEMFC （polymer electrolyte membrane fuel cell） stacks is presented with single cells inserted in pockets surrounded by a hydraulic medium. The hydraulic pressure introduces necessary compression forces to the membrane electrode assembly of each cell within a stack. Moreover, homogeneous cell cooling is achieved by this medium. First, prototypes presented in this work indicate that, upscaling of cells for the novel stack design is possible without significant performance losses. Due to its modularity and scalability, this stack design meets the requirements for large PEMFC units.

摘要：镁离子电池因其高理论容量和丰富的自然资源被认为是下一代储能系统的潜在候选者.然而,镁离子电池的发展受到镁负极与常见的镁盐和传统有机液体电解液溶剂不相容的限制.因此,电解液的发展是开发高效镁离子电池的决定性因素.镁离子电池的进一步应用所面临的一个主要挑战是开发具有适当的电化学窗口、与镁负极兼容、安全性高的电解液.当前,用于镁离子电池的主要电解液类型包括有机液体电解液、水系电解液、离子液体电解液和固态电解质.本文强调了每个类别中高性能镁离子电池电解液的最新进展,对先进电解液的设计策略进行了系统评估,分析了每种电解液的优点和局限性以及对现有问题的解决方案,并从电解液合成的角度讨论了镁离子电池的发展;最后,讨论并设想了镁离子电池电解液的未来设计,这将对进一步提高镁离子电池的性能提供支持.

摘要：The Algerian kaolin clay was investigated to remove Zn(II) heavy metal ion from aqueous solution. The effect of contact time, initial metal ion concentration, pH and temperature was experimentally studied in batch mode to evaluate the adsorption capacity, kinetic, thermodynamic and equilibrium. The extent of zinc adsorption increased with increasing initial concentration of adsorbat, pH and temperature. The linear Langmuir and Freundlich models were applied to describe equilibrium isotherms and both models fitted well. The monolayer adsorption capacity for Zn(II) ions was 12.23 mg per g of kaolin clay at pH 6.1 and 25°C. Dubinin-Radushkevich (D-R) isotherm model was also applied to the equilibrium data. Thermodynamic parameters showed that the adsorption of Zn(II) onto kaolin clay was spontaneous and endothermic process in nature. Furthermore, the Lagergren-first-order and pseudo-second-order models were used to describe the kinetic data. The experimental data fitted well the pseudo-second-order kinetic. As a result, the kaolin clay may be used for removal of zinc from aqueous media.

摘要：Background: In the Kingdom of Saudi Arabia (KSA), recent studies revealed increasing consumption of animal products and refined foods in the diet at the expense of vegetables and fruits. These dietary changes were accused of increasing the prevalence of both overweight and obesity observed among Saudi children, adolescences and adults in the last few decades. Objectives: The present study was a cross sectional study aimed at exploring the BMI distribution among students of college of Sciences and Arts for girls Khamis Mushayt Campus 1 at King Khalid University (KKU) and investigated how Dietary habits of students female affected body mass index (BMI). Methods: A total of 240 female students aged 18 - 22 years were about 25% from total students randomly chosen from college of Arts and Science Campus 1 at Khamis Mushayt, King Khalid University, KSA for the present study. A self-reported questionnaire about the student’s dietary habits was conducted and their body mass index (BMI) was measured. Data were analyzed using SPSS statistical software and Chi-square test conducted for variables. Results: About half of the students (47%) were within normal weight, 27.4% were under weight, 16% were overweight and 9.6% were categorized obese. The majority of the students reported eating meals with their family while more than half of sample (58.7%) had eating meals during watching TV. It was worth mentioning that 84.5% of students reported eating snacks such as chocolate and chips 3 or more times per week. There were no significant differences between BMI category and dietary habits. Conclusion and Recommendations: There were no significant difference between body mass index category and dietary habits. Increasing educational programs introduced healthy dietary concepts to improve the dietary habits of female students.