2007 Cleantech Conference and Trade Show Cleantech 2007最新文献_第9页

Nano-Engineering Of Magnetic Particles For Biocatalysis And Bioseparation 用于生物催化和生物分离的磁性颗粒纳米工程

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-72

Lo C.C.H., K. Tam, S. C. Tsang, Yeung C.M.Y., C. H. Yu

{"title":"Nano-Engineering Of Magnetic Particles For Biocatalysis And Bioseparation","authors":"Lo C.C.H., K. Tam, S. C. Tsang, Yeung C.M.Y., C. H. Yu","doi":"10.1201/9780429187469-72","DOIUrl":"https://doi.org/10.1201/9780429187469-72","url":null,"abstract":"Magnetic nanoparticles encapsulated in a thin coating as magnetic separable nano-vehicle for chemical species is a hot but challenging area. The facilitated separation of a small magnetic body carrying biologically active species is of a tremendous interest however; the stability of the magnetic body remains a key issue. We report new syntheses of silica encapsulated magnetic nanosize particles as magnetic separable carriers in large quantities based on simple synthetic techniques. The major advantage of using nano-size magnetic particles as carriers is that they display an excellent mass transfer coefficient (high surface area to volume ratio) comparable to soluble species but can still be easily separated from liquid using magnetic interaction with an external applied inhomogeneous magnetic field (i.e. 50MGOe). It is shown that the external coating surfaces can isolate and protect the magnetic core from destructive reactions with the environment where a wide range of conditions for fine chemical catalysis can be made possible. The functionalized surfaces could also offer anchoring sites for the immobilization of active chemical species of interests (enzymes, DNA oligos and antibodies). Most of these applications require nanoparticles covered with appropriate surface chemical functionalities where a strong magnetic core is essential for the separation of each particles from solution.","PeriodicalId":6429,"journal":{"name":"2007 Cleantech Conference and Trade Show Cleantech 2007","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"77126834","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

High performance iPP based nanocomposites for food packaging application 用于食品包装的高性能iPP基纳米复合材料

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-75

M. Avella, M. Errico, G. Gentile

引用次数: 1

Nanostructured perovskite-based oxidation catalysts for improved environmental emission control 纳米结构钙钛矿基氧化催化剂改善环境排放控制

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-71

H. Alamdari, M. Bassir, P. Seegopaul, A. Neste

{"title":"Nanostructured perovskite-based oxidation catalysts for improved environmental emission control","authors":"H. Alamdari, M. Bassir, P. Seegopaul, A. Neste","doi":"10.1201/9780429187469-71","DOIUrl":"https://doi.org/10.1201/9780429187469-71","url":null,"abstract":"Global concerns over environmental pollution have resulted in increasingly stringent regulations to control the levels of critical air pollutants, such as, carbon monoxide (CO), nitrogen oxide species (NOx), volatile organic compounds (VOC) and particulate matter (PM). These pollutants are removed by heterogeneous catalysis and the platinum group metals (PGM) remain the catalysts of choice but this situation is now complicated by the requirement for higher performance at lower costs while the PGM are experiencing escalating prices. A solution to this problem is the use of nanostructured perovskite-based Nanoxite™ catalysts engineered with unique structural features and high surface areas that enable higher catalytic efficiency at lower temperatures without sacrificing durability performance. In fact, Nanoxite is a “catalytic washcoat” product in that it simultaneously functions as the emission control catalyst while providing the bulk of the washcoat. As a result, both the PGM level and the amount of conventional washcoat materials are simultaneously reduced. Each powder particle possesses a hierarchical structure where larger micron sized particles hold the < 40 nanometer size perovskite grains. This desired arrangement facilitates easy powder handling and eliminates reactivity typically associated with discrete Nanograin materials. These perovskite-based catalyst formulations are applicable to both diesel engine and stationary emission control with respect to CO / VOC oxidation and the management of NOx and PM.","PeriodicalId":6429,"journal":{"name":"2007 Cleantech Conference and Trade Show Cleantech 2007","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"73383048","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 0

Self-Assembled Soft Nanomaterials from Renewable Resources 可再生资源自组装软纳米材料

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-45

G. John

引用次数: 1

Destruction of Organophosphate Agents by Recyclable Catalytic Magnetic Nanoparticles 可回收磁性纳米催化剂对有机磷剂的破坏作用

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-69

L. Bromberg, T. Hatton

引用次数: 0

Functionalized Nanoporous Ceramic Sorbents for Removal of Mercury And Other Contaminants 功能化纳米多孔陶瓷吸附剂去除汞和其他污染物

2007 Cleantech Conference and Trade Show Cleantech 2007 Pub Date : 2006-05-07 DOI: 10.1201/9780429187469-67

G. Fryxell, S. Mattigod, K. Parker, R. Skaggs

{"title":"Functionalized Nanoporous Ceramic Sorbents for Removal of Mercury And Other Contaminants","authors":"G. Fryxell, S. Mattigod, K. Parker, R. Skaggs","doi":"10.1201/9780429187469-67","DOIUrl":"https://doi.org/10.1201/9780429187469-67","url":null,"abstract":"A new class of high-performance nanoporous sorbents has been developed for heavy metal removal that overcomes the deficiencies of existing technologies. These novel materials are created from a combination of synthetic nanoporous ceramic substrates that have specifically tailored pore sizes (2 to 10 nm) and very high surface areas (~1000 m 2 /g) with self-assembled monolayers of wellordered functional groups that have high affinity and specificity for specific types of free or complex cations or anions. These sorbents known as SAMMS™ (SelfAssembled Monolayers on Mesoporous Silica) are hybrids of two frontiers in materials science: molecular selfassembly techniques and nanoporous materials. One form of SAMMS™ containing monolayers of mercaptopropyltrismethoxy silane has shown exceptional sorptive properties for mercury and other soft cations such as silver, cadmium, and lead. Another form of SAMMS™ with a functional monolayer consisting of ethylenediamine-Cu(II) complex (Cu-EDA) specifically adsorbs tetrahedral oxyanions such as arsenate, selenate, molybdate, chromate and pertechnetate even in the presence of high concentrations of sulfate. Separation of actinides can be addressed by SAMMS™ material synthesized with a set of monolayer functionalities consisting of hydroxypyridinones, acetamide and propinamide phosphonates. These nanoporous sorbents offer a better choice for efficient and cost-effective removal contaminants from diverse waste streams.","PeriodicalId":6429,"journal":{"name":"2007 Cleantech Conference and Trade Show Cleantech 2007","volume":null,"pages":null},"PeriodicalIF":0.0,"publicationDate":"2006-05-07","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"83210630","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":0,"RegionCategory":"","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}

引用次数: 1