Ce-MCM-22分子筛的合成与吸附性能

采用静态水热晶化法,以硅溶胶为硅源、六亚甲基亚胺(HMI)为模板剂,通过掺杂Ce合成了具有MWW层状结构的Ce-MCM-22分子筛.利用粉末X射线衍射(XRD)、扫描电镜(SEM)、透射电镜(TEM)等方法对其进行了表征,考察了各种因素对Ce-MCM-22分子筛吸附亚甲基蓝溶液的影响,结果表明当Ce-MCM-22分子筛的投加量为0.6 g/L,亚甲基蓝浓度为2.0 mg/L,pH值为7,震荡60 min时,吸附脱色效果较好.     

利用粉煤灰制备NaY分子筛及吸附性能研究

采用预处理的粉煤灰为主要原料,按照摩尔比为Al2O3:SiO2:Na2O:H2O=1:14:6:250配成溶胶,在100℃下水热合成10h,获得NaY分子筛.产品经过XRD分析,具有NaY分子筛的结构特征,经过SEM分析,分子筛的粒度比较均匀,大小为3～5μm.吸附降解亚甲基蓝性能试验表明,NaY分子筛吸附剂加入量为2.5g/L,亚甲基蓝溶液初始浓度1.0mg/L,pH值7左右时,脱色率和降解率分别达到98.27%、90.81%,为粉煤灰合成Y型沸石及分子筛应用提供了依据.     

粉煤灰制备ZSM-5分子筛及其应用

在对Cr⁽³⁺⁾和亚甲基蓝模拟的工业废水分别进行单因素研究的基础上,经过考察溶液的pH值、浓度、温度、分子筛添加量等因素之后,采用振荡吸附法对低浓度Cr(3+)和亚甲基蓝模拟的工业废水分别进行单因素研究的基础上,经过考察溶液的pH值、浓度、温度、分子筛添加量等因素之后,采用振荡吸附法对低浓度Cr⁽³⁺⁾和亚甲基蓝混合废水进行吸附研究。结果表明,利用粉煤灰制备的ZSM-5分子筛对单一Cr(3+)和亚甲基蓝混合废水进行吸附研究。结果表明,利用粉煤灰制备的ZSM-5分子筛对单一Cr⁽³⁺⁾和亚甲基蓝废水的吸附率分别为73.10%和98.20%;对混合废水同时有着良好的吸附效果,分子筛对混合废水中Cr(3+)和亚甲基蓝废水的吸附率分别为73.10%和98.20%;对混合废水同时有着良好的吸附效果,分子筛对混合废水中Cr⁽³⁺⁾和亚甲基蓝吸附率达77.14%和93.61%。     

N-Ti-MCM-22分子筛的合成及光催化性能研究

以叠氮化钠为氮源、硅溶胶为硅源、钛酸四丁酯为钛源、六亚甲基亚胺(HMI)为模板剂,按SiO2∶0.03TiO2∶(0-0.01)N∶0.03HMI∶0.035Al2O3∶0.2NaOH∶20H2O的摩尔比,采用静态水热晶化法合成了具有MWW层状结构的N-Ti-MCM-22分子筛。研究了所合成的分子筛的光催化性能,考察了催化剂的含氮量、催化剂的投加量、pH值、亚甲基蓝的初始浓度、光催化时间等因素对光催化降解亚甲蓝的影响。结果表明:N-Ti-MCM-22分子筛对亚甲基蓝的光催化降解效果较好,催化剂的投加量为1g/L、亚甲基蓝初始浓度在4mg/L、pH为中性在紫外光下的降解效果较好,脱色率及降解率分别达到了95.9%和97.8%,并采用XRD、TEM和EDS等对分子筛样品进行了表征。     

粉煤灰制备ZSM-5分子筛及其应用

在对Cr~(3+)和亚甲基蓝模拟的工业废水分别进行单因素研究的基础上,经过考察溶液的pH值、浓度、温度、分子筛添加量等因素之后,采用振荡吸附法对低浓度Cr~(3+)和亚甲基蓝混合废水进行吸附研究。结果表明,利用粉煤灰制备的ZSM-5分子筛对单一Cr~(3+)和亚甲基蓝废水的吸附率分别为73.10%和98.20%;对混合废水同时有着良好的吸附效果,分子筛对混合废水中Cr~(3+)和亚甲基蓝吸附率达77.14%和93.61%。     

煤重质组制备活性炭对亚甲基蓝和苯酚的吸附性能及机理研究

以童亭煤重质组族组分为原料,KOH为活化剂,制备了高比表面积活性炭,研究了碱炭比对活性炭孔结构及其吸附亚甲基蓝和苯酚性能的影响。结果表明,活性炭AC-4有最大的比表面积(3 752 m²/g),对2 000 mg/L的亚甲基蓝溶液吸附量达到最大,为1 996.74 mg/g,吸附率高达99.84%;而活性炭AC-2对120 mg/L的苯酚溶液吸附量达到最大,为107.08 mg/g,吸附率高达89.23%。活性炭对亚甲基蓝和苯酚有不同的吸附机制,对亚甲基蓝的吸附以孔隙填充为主,而对苯酚的吸附则以π-π相互作用为主。     

改性介孔微孔分子筛去除水中亚甲基蓝的研究

以壳聚糖包覆介孔-微孔复合分子筛(CS/MCM-41-A)为吸附剂去除水中的亚甲基蓝,研究了反应时间、溶液pH、溶液亚甲基蓝初始浓度、CS/MCM-41-A投加量、竞争离子对吸附的影响,分析了CS/MCM-41-A的吸附动力学和热力学特征。结果表明,25℃下,当CS/MCM-41-A投加量为0.3 g/L,溶液亚甲基蓝初始浓度100 mg/L,pH为6,吸附时间为40 min时,溶液中亚甲基蓝的去除率达到92.57%。CS/MCM-41-A吸附亚甲基蓝符合拟二级动力学方程,吸附等温线更好地符合Langmuir方程,CS/MCM-41-A对亚甲基蓝的有良好的吸附性能。     

Fe-5A催化亚甲基蓝溶液湿式H2O2氧化

以九水硝酸铁[Fe(NO3)3?9H2O]和柱状5A分子筛为原料采用湿法浸渍法制备Fe?5A催化剂,催化湿式H2O2氧化亚甲基蓝溶液,考察了间歇反应器中pH值和温度对亚甲基蓝转化率的影响及在连续固定床反应器中床层催化剂装填量、进料液流量、温度和亚甲基蓝入口浓度对亚甲基蓝降解性能的影响. 结果表明,在间歇反应中,在亚甲基蓝浓度50 mg/L、温度70℃、pH为2、反应20 min的条件下,亚甲基蓝的转化率为95.9%. 固定床反应中,随温度降低及进料液流量增加,亚甲基蓝转化率降低;随亚甲基蓝入口浓度增加,亚甲基蓝和化学需氧量(COD)的转化率变化幅度很小. 在温度70℃及pH=2、进料液流量4 mL/min、Fe?5A催化剂装填量1.25 g、亚甲基蓝浓度50?300 mg/L、固定床连续运转5 h的条件下,亚甲基蓝的转化率超过98%,COD转化率大于82%,铁浸出浓度低于3.5 mg/L,相同条件下,装填2.5 g 5A分子筛的固定床中50 mg/L亚甲基蓝的转化率仅为73.3%.     

煤矸石合成ZSM-5分子筛及其吸附性能研究

以预处理过的煤矸石为硅源、铝源,四丙基溴化铵为模板剂,采用常规水热合成法制得ZSM-5分子筛,并采用XRD、SEM、DTA/TGA等对所合成的分子筛进行了分析表征.用合成的ZSM-5分子筛吸附降解亚甲基蓝.发现亚甲基蓝的初始浓度为1.0mg/L、ZBM-5分子筛的投加量为0.02g、吸附时问为3小时、pH值为中性左右时降解效果较好,脱色率和降解率分别达到98.23%、95.16%.     

N-Ti-ZSM-5分子筛的合成及光催化性能研究

以叠氮化钠为氮源、硅溶胶为硅源、钛酸四丁酯为钛源,按2.5N∶65Ti∶100SiO2∶12Na2O∶2Al2O3∶2500H2O的摩尔比,采用静态水热合成法合成了N-Ti-ZSM-5分子筛,并采用XRD、TEM等对分子筛样品进行了表征。研究了所合成的分子筛的光催化性能,考察了催化剂的含氮量、催化剂的投加量、pH值以及光源等因素对光催化降解亚甲蓝的影响。并在可见光下处理10mg/L的亚甲基蓝,光催化20min,脱色率和降解率分别达到了75.84%和76.68%,取得了良好的效果。     

Insect antifeedant properties of anthranoids from the genusVismia

Vismiones and ferruginins, representatives of a new class of lypophilic anthranoids from the genusVismia were found to inhibit feeding in larvae of species ofSpodoptera, Heliothis, and inLocusta migratoria.     

Methyl 2,4,6-decatrienoates Attract Stink Bugs and Tachinid Parasitoids

Halyomorpha halys (Stål) (Pentatomidae), called the brown marmorated stink bug (BMSB), is a newly invasive species in the eastern USA that is rapidly spreading from the original point of establishment in Allentown, PA. In its native range, the BMSB is reportedly attracted to methyl (E,E,Z)-2,4,6-decatrienoate, the male-produced pheromone of another pentatomid common in eastern Asia, Plautia stali Scott. In North America, Thyanta spp. are the only pentatomids known to produce methyl 2,4,6-decatrienoate [the (E,Z,Z)-isomer] as part of their pheromones. Methyl 2,4,6-decatrienoates were field-tested in Maryland to monitor the spread of the BMSB and to explore the possibility that Thyanta spp. are an alternate host for parasitic tachinid flies that use stink bug pheromones as host-finding kairomones. Here we report the first captures of adult and nymph BMSBs in traps baited with methyl (E,E,Z)-2,4,6-decatrienoate in central Maryland and present data verifying that the tachinid, Euclytia flava (Townsend), exploits methyl (E,Z,Z)-2,4,6-decatrienoate as a kairomone. We also report the unexpected finding that various isomers of methyl 2,4,6-decatrienoate attract Acrosternum hilare (Say), although this bug apparently does not produce methyl decatrienoates. Other stink bugs and tachinids native to North America were also attracted to methyl 2,4,6-decatrienoates. These data indicate there are Heteroptera in North America in addition to Thyanta spp. that probably use methyl 2,4,6-decatrienoates as pheromones. The evidence that some pentatomids exploit the pheromones of other true bugs as kairomones to find food or to congregate as a passive defense against tachinid parasitism is discussed.     

2005～2006年国外塑料工业进展

收集了2005年7月～2006年6月国外塑料工业的相关资料，介绍了2005—2006年国外塑料工业的发展情况。提供了世界塑料产量、消费量及全球各类树脂生产量以及各国塑料制品的进出口情况。作为对比，介绍了中国塑料的生产情况。按通用热塑性树脂（聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂）、工程塑料（聚酰胺、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚）、通用热固性树脂（酚醛、聚氨酯、不饱和树脂、环氧树脂）、特种工程塑料（聚苯硫醚、液晶聚合物、聚醚醚酮）的品种顺序，对树脂的产量、消费量、供需状况及合成工艺、产品开发、树脂品种的延伸及应用的扩展作了详细的介绍。     

2007～2008年世界塑料工业进展

收集了2007年7月～2008年6月世界塑料工业的相关资料,介绍了2007～2008年国外塑料工业的发展情况,提供了世界塑料产量、消费量及全球各类树脂的需求量及产能情况.按通用热塑性树脂(聚乙烯、聚丙烯、聚苯乙烯、聚氯乙烯、ABS树脂)、工程塑料(尼龙、聚碳酸酯、聚甲醛、热塑性聚酯、聚苯醚)、特种工程塑料(聚苯·硫醚、液晶聚合物、聚醚醚酮)、通用热固性树脂(酚醛、聚氨酯、不饱和聚酯树脂、环氧树脂)不同品种的顺序,对树脂的产量、消费量、供需状况及合成工艺、产品应用开发、树脂品种的延伸及应用的进一步扩展等技术作了详细介绍.     

Inorganic/organic nanocomposite coatings: The next step in coating performance

Inorganic/organic hybrid materials have considerable promise and are beginning to become a major area of research for many coating usages, including abrasion and corrosion resistance. Our primary approach is to prepare the inorganic phase in situ within the film formation process of the organic phase. The inorganic phase is introduced via sol-gel chemistry into a thermosetting organic phase. By this method, the size, periodicity, spatial positioning, and density of the inorganic phase can be controlled. An important aspect of the inorganic/organic hybrid materials is the coupling agent. The initial task of the coupling agent is to provide uniform mixing of the oligomeric organic phase with the sol-gel precursors, which are otherwise immiscible. UV-curable inorganic/organic hybrid systems have the advantages of a rapid cure and the ability to be used on heat sensitive substrates such as molded plastics. Also, it is possible to have better control of the growth of the inorganic phase using UV curing. It is our ultimate goal to completely separate the curing of inorganic and organic phases to gain complete control over the morphology, and hence optimization of “all” the coating properties. Thus far, it has been found that concomitant UV curing of the inorganic and organic phases using titanium sol-gel precursors afforded nanocomposite coatings which completely block the substrate from UV light while maintaining a transparent to visible light. Also, it has been found that the morphology of the inorganic phase is highly dependent on the concentration and reactivity of the coupling agent. Presented at the 82nd Annual Meeting of the Federation of Societies for Coatings Technology, October 27–29, 2004, in Chicago, IL.     

Ethanol and (−)-α-Pinene: Attractant Kairomones for Some Large Wood-Boring Beetles in Southeastern USA

Ethanol and α-pinene were tested as attractants for large wood-boring pine beetles in Alabama, Florida, Georgia, North Carolina, and South Carolina in 2002–2004. Multiple-funnel traps baited with (−)-α-pinene (released at about 2 g/d at 25–28°C) were attractive to the following Cerambycidae: Acanthocinus nodosus, A. obsoletus, Arhopalus rusticus nubilus, Asemum striatum, Monochamus titillator, Prionus pocularis, Xylotrechus integer, and X. sagittatus sagittatus. Buprestis lineata (Buprestidae), Alaus myops (Elateridae), and Hylobius pales and Pachylobius picivorus (Curculionidae) were also attracted to traps baited with (−)-α-pinene. In many locations, ethanol synergized attraction of the cerambycids Acanthocinus nodosus, A. obsoletus, Arhopalus r. nubilus, Monochamus titillator, and Xylotrechus s. sagittatus (but not Asemum striatum, Prionus pocularis, or Xylotrechus integer) to traps baited with (−)-α-pinene. Similarly, attraction of Alaus myops, Hylobius pales, and Pachylobius picivorus (but not Buprestis lineata) to traps baited with (−)-α-pinene was synergized by ethanol. These results provide support for the use of traps baited with ethanol and (−)-α-pinene to detect and monitor common large wood-boring beetles from the southeastern region of the USA at ports-of-entry in other countries, as well as forested areas in the USA.