摘要：Magnetically recyclable porous sodium dodecyl sulfate(SDS)/Fe2O3 hybrids,which combine the porous structure of Fe2O3 and hydrophobicity of SDS,have been successfully synthesized for the first *** Fe2O3 has been first pyrolyzed from MIL-100(Fe)using a simple two-step calcination ***,the obtained porous Fe2O3 nanoparticles have been self-assembled with SDS molecules and yielded hydrophobic SDS/Fe2O3 *** porous SDS/Fe2O3 hybrids have been demonstrated to be highly efficient for the denitrification of pyridine under visible light *** pyridine removal ratio has reached values as high as 100%after irradiation for 240 *** the results of a series of experimental measurements,it was concluded that the superior photocatalytic performance of SDS/Fe2O3 hybrids could be attributed to(i)the fast electron transport owing to the unique porous structure of Fe2O3,(ii)the superior visible light absorption of Fe2O3 nanoparticles,and(iii)the“bridge molecule”role of SDS efficiently improving the separation and transfer across the interfacial domain of SDS/Fe2O3 of photogenerated electron-hole *** significantly,after the catalytic reaction,the SDS/Fe2O3 hybrids could be easily recovered using magnets and reused during subsequent cycles,which indicated their stability and recyclability.

摘要：Proper design and preparation of high-performance and stable dual functional photocatalytic materials remains a significant objective of research. In this work, highly dispersed noble-metal nanoparticles （Au, Pd, Pt） were immobilized on MIL-100（Fe） （denoted M@MIL-100（Fe）） using a facile room-temperature photodeposition technique. The resulting M@MIL-100（Fe） （M = Au, Pd, and Pt） nanocomposites exhibited enhanced photoactivities toward photocatalytic degradation of methyl orange （MO） and reduction of heavy-metal Cr（VI） ions under visible-light irradiation （A ≥ 420 nm） compared with blank-MIL-100（Fe）. Combining these results with photoelectrochemical analyses revealed that noble-metal deposition can effectively improve the charge-separation efficiency of MIL-100（Fe） under visible-light irradiation. This phenomenon in turn leads to the enhancement of visible-light-driven photoactivity of M@MIL-100（Fe） toward photocatalytic redox reactions. In particular, the Pt@MIL-100（Fe） with an average Pt particle size of 2 nm exhibited remarkably enhanced photoactivities compared with those of M@MIL-100（Fe） （M = Au and Pd）, which can be attributed to the integrative effect of the enhanced light absorption intensity and more efficient separation of the photogenerated charge carrier. In addition, possible photocatalytic reaction mechanisms are also proposed.

摘要：介绍了当前微机五防装置闭锁应用的基本情况和容易忽略的问题,特别讨论了防“走空程”和验电、接地桩头设置的问题,提出条形码方法等二次回路的防误操作的解决设想。

摘要：针对应用化学学科发展需要,设计出适合工科类学生的物理化学实验教学模式,在原有的实验操作训练模式上可以尝试引入计算机辅助教学,例如可采用虚拟仿真试验模块,可以充分激发学生主动性和积极性,改进考核机制,有利于创新思维培养。本文从物理化学实验课程的教材建设、教学内容、教学实施方法、考核方式等几方面对新形势下的物理化学实验课程的教学改革进行了初步的探索。

摘要：在相对温和的反应条件下,利用简单的反应过程将CO_(2)固定,形成高附加价值的产物,是当前很受关注的一项科学技术挑战,其中环氧丙烷和CO_(2)的环加成反应是实现碳中性,固定CO_(2)的一条理想途径,CO_(2)的有效活化则是这个反应的前提。但目前关于实验的反应过程和机理仍然是有待解决的问题。因此,在本研究中,我们通过合成不同金属基底的MOFs材料,分别进行CO_(2)与环氧丙烷的加成反应,分析最有利于反应进行的催化材料。实验结果表明,UiO-66-NH2的催化效果最好。本研究为不同材料的CO_(2)环加成反应的设计和应用提供一些新思路。

摘要：首先设计合成出新颖反应性Si O2模板剂(即表面含苄基氯化学官能团的Si O2纳米球),然后利用1,4-对二氯苄(DCX)作为自交联功能单体,成功地发展了一种"反应性模板剂诱导原位超交联法"制备层次孔聚合物(HPP)及其层次孔碳材料(HPC)的新思路:一方面,DCX作为有机单体分子,可与Si O2纳米球表面的苄基氯化学官能团原位反应形成共价键,极大地增强了聚合物前驱体和模板剂的相互作用力,有利于模板剂的高度单分散和表面均匀包覆共价有机聚合物;另一方面,DCX分子可以发生自交联反应,免去交联剂的额外添加,简化了制备流程.利用该法所得HPP具有独特的微孔-中孔-大孔呈层次化分布的孔结构特征:微孔壳-大孔腔空心纳米球之间相互交联堆叠形成丰富的中孔和大孔,各层次纳米孔道紧密相连.进一步地,HPP的共价有机骨架具有超交联化学结构,可确保这类层次孔纳米结构在高温碳化过程中的稳定继承,由此制得HPC,其BET比表面积为756 m2·g-1.