摘要：Photocatalytic hydrogen production coupled with selective oxidation of organic substrates to produce highvalue-added fine chemicals has drawn increasing ***,we report a noble metal-free photocatalyst for the highly efficient and simultaneous generation of hydrogen and the selective oxidation of benzyl alcohol into benzaldehyde over Cd S@Mo S2 heterostructures under visible *** the need for a sacrificial agent,Cd S@Mo S2 displayed an excellent hydrogen production rate of 4233μmol g^-1h^-1with0.3 mmol benzyl alcohol,which is approximately 53 times higher than that of bare Cd S nanorods(80μmol g^-1h^-1).The reaction system was highly selective for the oxidation of benzyl alcohol into *** the amount of benzyl alcohol increased to 1.0 mmol,the hydrogen production reached9033μmol g^-1h^-*** electron microscopy and transmission electron microscopy images revealed that p-type Mo S2 sheets with a flower-like structure closely adhered to n-type semiconductor Cd S nanorods through the formation of a p-n *** a potential Z-scheme photocatalyst,the Cd S@Mo S2 heterostructure effectively produces and separates electron-hole pairs under visible ***,the electrons are used for reduction to generate hydrogen,and the holes oxidize benzyl alcohol into ***,a mechanism of photogenerated charge transfer and separation was proposed and verified by photoluminescence,electrochemical impedance spectroscopy,photocurrent and Mott-Schottky *** results reveal that the Cd S@Mo S2 heterojunctions have rapid and efficient charge separation and transfer,thereby greatly improving benzyl alcohol *** work provides insight into the rational design of high-performance Z-scheme photocatalysts and the use of holes and electrons to obtain two valuable chemicals simultaneously.

摘要：The special electronic characteristics and high atom usage efficiency of metal-nitrogen-carbon(M-N-C)materials have made them extremely attractive for oxygen reduction reactions(ORRs).However,it is inevitable that hydrogen peroxide(H_(2)O_(2))will be formed via the two-electron pathway in ***,the Cu nanoparticles(NPs)have been encapsulated into Ni doped hollow mesoporous carbon spheres(Ni-HMCS)to reduce the generation of H_(2)O_(2)in *** tests confirm that the introduction of Cu NPs improves the ORR performance *** obtained Cu/Ni-HMCS exhibits a half-wave potential of 0.82 V *** hydrogen electrode and a limited current density of 5.5 mA cm^(-2),which is comparable with the commercial Pt/***,Cu/Ni-HMCS has been used in Zn-air battery,demonstrating a high power density of 161 mW cm^(-2)and a long-term recharge capability(50 h at 5 mA cm^(-2)).The theoretical calculation proposes a tandem catalysis pathway for Cu/Ni multi-sites catalysis,that is,H_(2)O_(2)released from the Ni-N_(4)and Cu-N_(4)sites migrates to the Cu(111)face,on which the captive H_(2)O_(2)is further reduced to H_(2)*** work demonstrates an interesting tandem catalytic pathway of dual-metal multi-sites for ORR,which provides an insight into the development of effective fuel cell electrocatalysts.

摘要：Helical metal-organic frameworks(MOFs)were used as templates or precursors to fabricate helical carbon nanorods(HCNRs)for the first *** carbon contains many topological defects such as pentagonal or heptagonal carbons,which have the potential to facilitate oxygen reduction reactions(ORR).HCNRs show more positive onset/halfwave reduction potentials and higher limited current density than straight carbon nanorods(SCNRs).They also exhibit four-electron oxygen reduction in tests of ORR,while the alternative SCNRs prefer a two-electron reduction *** and theoretical studies reveal that these enhanced ORR activities can be attributed to pentagon/heptagon defects in *** work provides an effective strategy to synthesize helical,defect-rich carbon materials and opens up a new perspective for utilization of a spiral effect for the development of more effective electrocatalysts.

摘要：基于复杂超长环形结构的实例,采用MIDAS Gen有限元软件对不同框架截面的结构和有无后浇带的结构进行分析,并给出了整体变形、楼板应力、框架内力等分析结果。在分析结果基础上,阐述了此类结构温度应力和温度变形分布规律性,并探讨此类结构变形成分组成特点;通过比较不同模型楼板应力,总结框架刚度分布与楼板应力水平的关系,并分析设置后浇带对框架梁内力的影响。得到的结论主要有楼板配筋方法、柱子截面选择原则以及后浇带工况下钢梁轴力设计校核,对类似超长环形结构设计有一定参考价值。

摘要：催化剂与助催化剂之间的低电荷分离效率严重限制了光催化性能.催化剂与助催化剂之间的强界面相互作用可以提高电荷分离效率.通过引入界面化学键增强组分间的界面相互作用是提高光催化性能的有效手段之一.本文合成了ZnIn_(2)S_(4)(ZIS)/Sv-MoS_(2)光催化剂,ZIS中的S原子与Sv-MoS_(2)中未配位Mo原子之间的键合作用形成了界面Mo–S键,这极大地提高了ZIS的光催化活性.采用不同的NaBH4蚀刻时间制备了MoS_(2-x)h.优化后的Z I S/MoS_(2)-4 h复合材料的产氢速率为7.6 mmol g^(−1)h^(−1),是原ZIS(1.6 mmol g^(−1)h^(−1))的4.75倍,是ZIS/MoS_(2)(3.7 mmol g^(−1)h^(−1))的2.05倍.非凡的光催化活性可归因于光生电子在Mo–S键的作用下更容易从ZIS转移到MoS_(2).光电测量表明,ZIS/MoS_(2)-4h具有有效的电荷转移.本工作揭示了引入界面化学键对ZIS/MoS_(2)光催化活性的影响,为通过界面工程设计优良的助催化剂提供了一种简单有效的方法.

摘要：利用太阳能将CO_(2)光转化为化学燃料是前沿研究的热点.当前,科研的重点在于开发和优化各类光催化材料的性能.异质结构不仅用于增强无机半导体催化剂的活性,而且用于金属-有机框架(MOFs)光催化剂的构建.随着异质结技术的不断进步,新的相结概念应运而生.尽管关于无机半导体中的相结研究已取得一定进展,但是MOFs相结结构的探索尚处于起步阶段.本文中,我们成功设计并构建了一种具有卓越光催化CO_(2)还原性能的MOFs相结杂化材料.这种材料由具有高度连接性的卟啉配体(TCPP-Ni)与Zr6团簇紧密结合而成,在溶剂热反应条件下,PCN-222-Ni能够快速且均匀地成核.通过精准调控调节剂的用量,我们实现了同分异构体PCN-224-Ni在类似条件下较慢的晶体形成过程.最终制得的P@P杂化材料展现出高表面积、多孔性和卓越的结晶度.由于PCN-222-Ni和PCN-224-Ni之间的带隙匹配,光生载流子的分离和迁移得以促进,从而使P@P杂化材料展现出卓越的光还原CO_(2)性能.这一重大突破不仅标志着MOFs相结结构研究的重大进展,还拓宽了MOFs相结在CO_(2)光转化领域的应用前景.

摘要：国家教育数字化战略行动背景下,信息化建设进程进一步加速了教育资源融合、教育供给结构转型以及教育治理模式创新。作为教育治理体系架构下的重要组成部分,教育督导迈向“智慧化”是应然选择。如何顺应时代发展需求、顺应人民群众对教育公平与教育质量的美好诉求与向往,需要在国家、地方各级各层教育用户需求之间做好平衡、兼顾、取舍,设计一整套贴合需求的智慧教育督导体系架构——服务于教育全域突出问题的研判与解决,从而实现教育督导从单一业务管理功能转向监测分析与公众服务并重,推动教育督导治理体系和治理能力的升级,为教育提质增效保驾护航。课题组基于国家智慧教育督导平台建设的实践,面向全国督导战线干系人(省、市、区、校督导负责人、家长等)开展调研和访谈,充分利用基于语义主题发现用户需求的思路方法,采用文本挖掘技术对多源异构数据进行处理,抽取需求特征词库,并与督导业务流程建立映射关联,绘制需求图谱。通过对图谱进行释义和解构,为精准感知各级教育督导业务需求提供科学分析与决策支持,为我国智慧教育督导发展路径提供策略建议。

摘要：针对当前人们对创意产业园特性与内涵的误读,文章引入新产业空间视角,从内涵的深化、认识的更新和价值的重塑3个维度逐层深入剖析创意产业园的特性、价值取向、构成单元及功能属性,以此辨析当今如火如荼的创意产业园规划建设的动态。

摘要：中国书画艺术中的线条具有其特殊的审美、造型、写意等属性,认清线的基本属性,探讨这一课题,对坚守中国书画本质精神有益。线条是在一定技巧保证下,以有规律的、精准的、合理的线形、线质来确保其流畅与抒情,使书家创作的作品更具观赏性和审美价值。线的装饰性是由其表现形式所决定的。"写意精神"应是中国书画发展演进过程中的一条"主脉",探析书画写意性是中国书法在发展中的必然选择,也是历史选择。

摘要：法国动画多以短片为主,其风格是一种完全不同于美国、日本类偏商业动画的风格。继承了丰厚的法国文化底蕴及背景,同时汲取了法国哲学里的带有批判性的思维感受。虽然说大部分都是动画短片,但其以有内涵的故事情节,观后可给人带来的哲学思想,和它独特的声画的处理,加上法国政府对独立动画大力支持的条件下,对整个动画动漫行业还是产生着巨大影响。甚至强大的日本动漫风格的某些动画部分,也是学习了法国动画的艺术风格表形式。将结合二维动画作品《IslanD》,以其中的法式动画风格进行分析,具体本篇会浅谈法国动画的艺术表现手法,风格形式感,人物造型的特点,及动画与之背后包含的意义、人生哲学等等。