纳米ZnO光催化有机磷农药降解的研究

研究纳米氧化锌对三种有机磷农药的降解情况，考查了催化剂及其用量、光照时间、pH值的影响，结果表明纳米氧化锌能使有机磷农药发生降解。实验结果还表明不同形貌的氧化锌在降解有机磷农药时其效果不一样，网状比粒状所需要时间要短，这可能因为网状的粒径比较小，与降解体系接触空间更大。     

Enatioselective[2 2 2] Cycloaddition as A Synthetic Tool

1 Results Transition metal-catalyzed [2 2 2] cycloaddition is one of the most efficient protocols for the construction of six-membered ring system.Our group has comprehensively studied various types of highly enantioselective [2 2 2] cycloaddition for the synthesis of chiral cycloadducts; we already reported an iridium-catalyzed intermolecular [2 2 2] cycloaddition between α,ω-diynes,having various tethers and substituents on the alkyne termini,and monoalkynes,possessing oxygen or/and nitrogen functiona...     

Functional Materials for Catalytic and Magnetic Applications

1 Introduction Metal, metal oxide and metal compound nanoparticles (NPs) received considerable attention due to their unique properties: catalytic, magnetic, optical, electronic, etc. We believe that for different applications, there are preferable morphologies of NP-stabilizing medium composites. For example, small (1-3 nm) nanoparticles formed in micro/mesoporous hypercrosslinked polystyrene demonstrate excellent catalytic properties in various hydrogenation and oxidation reactions due to high surface...     

Dipiphosphinoazines-from Rich Coordination Variability to Catalysis

1 Results Diphosphinoazines are very versatile,potentially up to tetradentate ligands,known to form complexes with many transition metals.Recently,we developed synthesis of diphosphinoazines with various substituents on phosphorus donor atoms.This fine tuning allowed to design novel catalytic systems for several organic reactions.Hydroamination of Michael-type substrates with selected primary and secondary amines revealed the reactivity of some amines in non-catalyzed reaction.Hydroamination of methyl m...     

碳酸铯催化下烷基芳醚的制备

以碳酸铯作催化剂，碳酸钾作碱，以乙腈作溶剂，在回流的条件下酚与卤代烃反应高产率得到烷基芳醚．     

介孔TiO2固体超强酸催化合成环己酮乙二醇缩酮

制备了纳米TiO2固体超强酸催化剂和介孔TiO2固体超强酸催化剂，表征了催化剂的物化性能．研究了浓硫酸和固体超强酸催化剂催化合成环己酮乙二醇缩酮的催化性能，系统考察了酮和醇物质的量的比、催化剂用量、反应时间等因素对产品收率的影响．试验表明，介孔TiO2固体超强酸是合成环己酮乙二醇缩酮的良好催化剂，在n（酮）：n（醇）=1：1．5，催化剂用量1．0g，环己酮用量20．66mL，带水剂环己烷用量20mL，反应时间2h的优化条件下，环己酮乙二醇缩酮的收率可达82．1％．     

键联法合成高分子负载金属卟啉催化剂的研究进展

高分子负载金属卟啉有望提高金属卟啉的催化活性和稳定性，能有效地与产物分离，因此成为研究的热门课题．综述了近年来以静电作用、轴向配位和共价键合成高分子负载金属卟啉催化剂的研究进展．以金属卟啉单体与其他单体共聚合成高分子负载金属卟啉催化荆有望成为新的热门课题．     

活性炭和活性炭纤维在高压脉冲放电水处理中催化作用的对比研究

对脉冲流光放电与活性炭或活性炭纤维联合处理废水时活性炭和活性炭纤维的催化作用进行了研究。结果表明：脉冲流光放电与活性炭或活性炭纤维联合处理，降解率分别提高22％和24％，说明联合处理过程具有协同效应。与吸附饱和的活性炭或活性炭纤维联合处理，降解率分别提高12．25％和16．7％，说明活性炭和活性炭纤维在联合处理过程中起催化作用。联合处理过程中加入H2O2不但提高了O3和UV的利用率，而且还提高了活性炭和活性炭纤维的再生率。     

Al2O3修饰Ni／TiO2催化剂上甲烷干重整反应

通过Al2O3修饰的Ni-TiO2-Al2O3干凝胶催化剂，该催化剂在973K条件下焙烧10h后比表面积为363m^2／g。孔分布介于2．5～2．7nm之间。采用BET和X-射线衍射考察了Al2O3组份对Ni／TiO2催化剂的影响。结果表明，Al2O3的加入使催化剂颗粒度变小，镍的分散度提高，抑制了Ni／TiO2催化剂的积碳，从而明显的提高了Ni-TiO2-Al2O3催化剂上甲烷和二氧化碳重整反应的活性和稳定性。     

氯化聚氯乙烯三氯化铁催化合成乳酸异戊酯

在氯化聚氯乙烯三氯化铁催化剂存在下，由异戊醇与乳酸反应合成了乳酸异戊酯．当 ０．１ｍｏｌ乳酸、０．３ｍｏｌ异戊醇和 ０．５０ｇ催化剂一起回流加热６０ｍｉｎ，产品收率９６．９％，同时研究 了氯化聚氯乙烯三氯化铁的重复使用性能．