利用热分析质谱联用技术(TA-MS)分析比较配合物及双配合物的热分解行为——介绍一个综合性研究型化学实验

应用热分析．质谱联用技术考察了反式-[Co（en）2Cl2]Cl、K3[Fe（C2O4）3]·3H2O配合物以及相应的双配合物——反式-[Co（en）2Cl2]3[Fe（C2O4）3]·4．5H2O的程序升温热分解行为。通过对样品的热失重分析、逸出气体的质谱分析以及固相产物的物相分析,了解其热分解过程机理,比较了在受热过程中反式-[Co（en）2Cl2]Cl、K3[Fe（C2O4）3]·3H2O配合物和双配合物的过渡金属离子与配体之间以及配体与配体之间的相互作用的变化。     

[Fe(L)3](ClO4)3(L=bpy,phen)与Na2S2O3在室温下的固相氧化还原反应

本文研究室温下[Fe(bpy)3](ClO4)3.3H2O和[Fe(phen)3](ClO4)3.H2O分别与Na2S2O3.5H2O发生的固-固相氧化还原反应。用Mossbauer谱、XRD、IR、UV漫反射谱、元素分析、TG-DTA和磁化率测定等手段表征了反应24h后的固相产物,报道了[Fe(bpy)3](ClO4)2的结晶学数据。结果表明, 室温下反应速度快, 反应进行完全。     

由四核Fe(Ⅱ)金属簇和三缺位Keggin型磷钨酸盐构筑的夹心型多金属氧酸盐(英文)

利用水热法合成了由四核FeⅡ簇和三缺位Keggin型磷钨酸盐共同构筑而成的夹心型多金属氧酸盐(H2dien)4H2[Fe4(H2O)2(α-B-PW9O34)2]·8H2O(1)(dien=二乙烯三胺);采用红外光谱、X-射线单晶衍射定性表征了产物的结构,利用元素分析测定了其组成.结果表明,化合物1属于三斜晶系,P-1空间群.其多阴离子[Fe4(H2O)2(α-B-PW9O34)2]10-由两个[α-B-PW9O34]9-单元通过Fe4O14(H2O)2簇连接而成;Fe2+离子采用六配位的八面体几何构型.同时,质子化的H2dien2+充当抗衡阳离子,经氢键与杂多阴离子[Fe4(H2O)2(α-BPW9O34)2]10-相互作用形成三维结构.     

新颖的PW11O39Fe(Ⅲ)(H2O)4-/H2O2类光-Fenton体系光催化降解苯胺

将Keggin型铁取代杂多阴离子PW11O39Fe(Ⅲ)(H2O)4-[PW11Fe(Ⅲ)(H2O)]构成的类光-芬顿体系用于水体生物难降解有机污染物苯胺(ArNH2)的降解。 研究了在紫外光照射和H2O2存在下,PW11Fe(Ⅲ)(H2O)对ArNH2降解的均相光催化作用。 考察了ArNH2、H2O2和PW11Fe(Ⅲ)(H2O)浓度对光催化降解反应速率的影响。 实验结果表明,0.1 mmol/L PW11Fe(Ⅲ)(H2O)+0.2 mmol/L H2O2+0.1 mmol/L ArNH2的中性溶液在300 W汞灯照射下反应60 min,ArNH2的降解率达100%,总有机碳(TOC)去除约52%。 同时讨论了PW11Fe(Ⅲ)(H2O)光催化H2O2产生羟基自由基的分子机制,并比较了酸性和中性条件下苯胺的光催化降解效果。     

Keggin型铁取代杂多阴离子PW_(11)O_(39)Fe(Ⅲ)(H_2O)~(4-)光催化降解硝基苯

以Keggin型铁取代杂多阴离子PW11O39Fe(Ⅲ)(H2O)4-[PW11Fe(Ⅲ)(H2O)]代替传统光芬顿方法中的Fe3+作为光催化剂,构成一个新颖的光催化体系并用于水体生物难降解有机污染物硝基苯(NB)的降解.详细研究了在紫外光照射和H2O2存在下,PW11Fe(Ⅲ)(H2O)对NB降解的均相光催化作用.考察了NB初始浓度、溶液pH、H2O2和PW11Fe(Ⅲ)(H2O)浓度对光催化降解反应速率的影响.实验结果表明,1.0mmol·L-1PW11Fe(Ⅲ)(H2O)+5.0mmol·L-1H2O2+1.0mmol·L-1NB的中性溶液在300W汞灯照射下反应120min,NB的降解率达93%,总有机碳(TOC)去除约31%,显示了该新颖体系对NB光催化降解的高效性和优越性.     

甲烷单加氧酶化学模拟的初步研究

制备了两种新的甲烷单加氧酶模拟酶：（1）固载于分子筛上的单氧桥联双核铁配合物Fe2(O)(H2O)2-(phen)4(ClO4)；（2）在表面修饰的介孔分子筛上原位合成的氧桥、羧基桥联双核铁配合物Fe2(O)（μ－CH3COO）2－(H2O)2-(phen)2Cl2。利用紫外漫反射、红外漫反射、拉曼光谱、N2吸脱附分析及元素分析等手段，对模拟酶进行结构分析。结果表明，Fe2(O)(H2O)2-(phen)4(ClO）4主要是以配合物中的桥氧与分子筛表面硅羧基成氢键固载；原位合成的Fe2(O)（μ－CH3COO）2(H2O)2-(phen)2Cl2中，一个羟基来自表面修饰的分子筛，催化反应结果表明在，温和条件下、以叔丁基过氧化氢为氧化剂，这两种模拟酶均催化环已烷氧化。     

用晶格氧为氧源的甲烷部分氧化制合成气

 采用热重分析技术在甲烷气氛下考察了储氧材料Fe2O3提供晶格氧的过程，用甲烷／氧切换反应和在线质谱检测方法研究了以Fe2O3晶格氧代替气相氧用于甲烷部分氧化制合成气的可能性．结果表明，Fe2O3在甲烷气氛下的还原过程包括Fe2O3→Fe3O4和Fe3O4→FeO→Fe，甲烷被氧化为CO2和H2O．在750℃下进行的CH4／O2切换反应结果表明，首先，约25％的CH4与Fe2O3中的晶格氧反应，生成CO2和H2O，然后，生成的CO2和H2O与剩余的约75％的CH4在Ni／Al2O3催化剂上进行蒸汽重整和C\r\nO2重整，从而按燃烧－重整机理实现甲烷部分氧化制合成气．选择合适的CH4／O2切换条件，可使甲烷高转化率、高选择性地生成合成气．     

经Fe(NO3)3处理的Fe3O4纳米微粒分析

Fe3O4纳米微粒是一种制备磁性液体的重要组成部分。但Fe3O4纳米微粒不稳定,极易氧化成γ-Fe2O3,其磁化强度也会明显降低[1-2]。铁氧体还易为酸溶解,化学反应式为:MFe2O4 8H M2 2Fe3 4H2O式中M为Fe、Co、Mn等二价金属。在Massart法制备酸性离子型磁性液体的方法中,采用了Fe(NO     

通过铜(Ⅱ)、铁(Ⅲ)和铁(Ⅱ)与2,2'-联咪唑协同作用构筑的超分子及其结构的研究

在水和乙醇溶剂中,通过Cu(Ⅱ),Fe(Ⅲ)和Fe(Ⅱ)与2,2'-联咪唑协同作用,构筑了四种新的超分子配合物[Cu(H2biim)(gly)(H2O)]Cl·H2O(1),[Cu(H2biim)(C3H2O4)(H2O)]·1.5H2O(2),[Fe2(μ-O)(H2biim)4(H2O)2](NO3)4·C2H5OH(3)和[Fe(H2biim)3]SO4(4)(H2biim=2,2'-联咪唑;gly-=甘氨酸根;C3H2O24-=丙二酸根).并通过元素分析,红外光谱和X射线单晶衍射对其组成、结构和谱学性质进行研究.H2biim配体,丙二酸根和甘氨酸根三种配体都采用了双齿螯合方式与金属离子配位.配合物1～4中,通过H2biim配体的N-H键与阴离子、水分子和溶剂分子形成多种氢键,如R12(7),R22(9)和R12(4)等,以及H2biim配体之间的π-π堆积,阳离子不对称单元构筑了多维结构的超分子配合物.     

N_2O在Cu_xFe_(1-x)Fe_2O_4和Ni_xFe_(1-x)Fe_2O_4复合氧化物催化剂上的分解反应

用共沉淀法制备了一组具有尖晶石结构的Cu-Fe和Ni-Fe复合氧化物,用于有氧条件下催化分解N2O,考察了催化剂组成对催化活性的影响.用N2物理吸附(BET)、X射线衍射(XRD)、H2程序升温还原(H2-TPR)等技术对催化剂进行了结构表征.结果表明:在不同组成的Cu-Fe、Ni-Fe系列复合氧化物催化剂中,Cu Fe2O4和Ni Fe2O4对于N2O分解反应的初活性较高,这是因为Cu Fe2O4和Ni Fe2O4的比表面积较高、晶粒较小,而且其表面氧物种与金属(Cu2+、Fe3+)的化学作用较弱,氧物种易脱除、脱氧量较高.相比较而言,Ni Fe2O4催化剂上的N2O分解活化能低于Cu Fe2O4,Ni Fe2O4的初活性优于Cu Fe2O4.500℃连续反应100 h,Cu Fe2O4上的N2O转化率降至84.9%,而Ni Fe2O4上的N2O转化率一直保持99%,Ni Fe2O4有较高的催化稳定性.     

Preparation of Molecular Sieve Catalyst and Application in the Catalytic Oxidation Treatment of Waste Water

Citric acid is an important additive in foods, cosmetics, medicine and so on, but it discharges about 10 ton of factory effluent when 1 ton of citric acid is produced. The COD of the factory effluent is near 20000 mg/L. The treatment of citric acid factory effluent is a serious problem in environmental chemistry. It is found that molecular sieve support metal complexes have high catalytic activity in aerobic oxidation of alkene [1,2]. In this paper, a kind of molecular sieve catalyst was prepared. The catalyst was used for the treatment of citric acid factory effluent by method of catalytic oxygen oxidation.     

光还原法制备不同形貌银纳米粒子及其形成机理

光还原法制备不同形貌银纳米粒子及其形成机理;光还原;纳米银;形成机理     

Ce~（4＋）－Ce~（3＋）循环体系引发淀粉与丙烯酰胺接枝共聚合反应动力学研究

Ｃｅ~（４＋）－Ｃｅ~（３＋）循环体系引发淀粉与丙烯酰胺接枝共聚合反应动力学研究张连生，王玉芹，杨巍（黑龙江大学化学系，哈尔滨，１５００８０）（黑龙江商学院商管系，哈尔滨，１５００７６）关键词Ｃｅ~（４＋）－Ｃｅ~（３＋）循环引发、Ｃｅ~（４＋）复合引发?..     

Determination of Mn,Fe, Cu,Zn, and Pb in particulate matter,raw and final materials of a brick factory by radionuclide X-ray fluorescence analysis

Radionuclide X-ray fluorescence method with a Si/Li semiconductor detector and²³⁸Pn exciting source was used in the study of Mn, Fe, Cu, Zn, and Pb content of solid emissions, raw and final materials of a brick factory. From the point of view of metal content, the working environment of the brick factory is safe for workers.     

Factory quality control of adhesive joints in wood structures

Methods employed on the spot in the production process for the factory quality control and in the application of adhesive-bonded structures are described and the efficiency of the methods is estimated.     

Evaluation of Methanogenic Activity of Biogas Plant Slurry for Monitoring Codigestion of Ossein Factory Wastes and Cyanobacterial Biomass

Overall measurement of methanogenic activity of sludge and or slurry is thought as a key for understanding the basic physiology of anaerobic consortia involved in anaerobic digestion process of an alternative biomass. In this study, the methanogenic activity of biogas plant slurry was used to evaluate the anaerobic digestion of ossein factory wastes such as sinews and primary clarified bone waste (PCBW) and cyanobacterial biomass in standard assay conditions. A maximum methanogenic activity was reported here when ossein factory wastes mixed with cyanobacterial biomass in specific proportions in which sinews and PCBW alone also favored to a significant methane yield. Cyanobacterial biomass alone did not give a desirable methanogenic activity. Approximately 48% of total solids were destroyed from these wastes after 30 days. This study gives information on the use of these wastes with suitable proportions for taking an effort in a large-scale anaerobic digestion in an effective way of ossein factory.     

Fe—C层加催化剂治理制药废水中有机污染物新方法研究

本文以常温常压下,固定管长比,管内装活性炭——铁屑为滤层、控制废水流速及加入催化剂为实验处理条件,测定了四环素制药厂综合废水（总排放口取）、结晶提炼车间废水和四环素提浓车间母液三种废水在处理前后的ｐＨ、色度、浊度、ＣＯＤｃｒ值及四环素和部分有机杂质浓度的变化,通过与水解－生物氧化－絮凝法治理工艺作经济效益的初步对比,得出此法是一种投资较少、效益较高的切实可行的抗生素制药厂废水治理新方法。     

LBS生产含硝基芳烃衍生物废水的树脂吸附处理研究

用ＮＫＡ—２树脂对ＬＢＳ生产中含硝基衍生物废水进行动态吸附试验，研究影响吸附的一些因素。结果显示，采用三柱串联吸附可以达到９８％的脱色率和９７％的硝基物去除率。从解吸液中可分离回收ＬＢＳ和ＲＢＳ（右旋氨基二醇）及其中间体，经处理后的废水可部分循环用于生产车间的洗涤工序。     

Applications of ion chromatography in cane sugar research and process problems

Ion chromatography (IC) offers the sugar technologist a simple, reliable technique for the simultaneous separation and determination of inorganic and organic ions in complex process mixtures. Identification and measurement of ions present in sugar liquors are important factors in understanding and maximising sugar recovery. Choice of IC column packing, eluent composition and pH, and detection mode (suppressed and non-suppressed) are shown to be useful variables when analysing sugar factory products, especially the multivalent ions such as phosphate and organic acids (aconitic and oxalic acid). The IC methods show good agreement with conventional analysis methods (potentiometric titration, atomic emission and absorption). IC also produced excellent repeatability and recovery from these matrices. Examples of the application of IC analysis in applied sugar research and processing problems include clarification studies, degradation of molasses, sugar solution colour removal and factory process problems.     

Early Aerobic Exercise Combined with Hydrogen-Rich Saline as Preconditioning Protects Myocardial Injury Induced by Acute Myocardial Infarction in Rats

Applied Biochemistry and Biotechnology - The feasibility of microalgae cultivation using cooking cocoon wastewater (CCW) collected from a silk production factory was investigated in this work....