Photocatalytic degradation of isoproturon herbicide over TiO<sub>2sub>/Al-MCM-41 composite systems using solar light
详细信息查看全文 | 推荐本文 |
摘要
<span style='font-weight: bold'>Version fran&#xe7;aise abr&#xe9;g&#xe9;e —span> <span style='font-weight: bold'>D&#xe9;gradation photocatalytique de pesticides dans des eaux pollu&#xe9;es d'origine agricole.span> Plusieurs types de pesticides organiques peuvent &#xea;tre ais&#xe9;ment d&#xe9;truits et totalement min&#xe9;ralis&#xe9;s &#xe0; temp&#xe9;rature ambiante par voie photocatalytique, en utilisant TiO<sub>2sub> comme photocatalyseur. Dans le pr&#xe9;sent travail, nous avons d&#xe9;termin&#xe9; l'influence de diff&#xe9;rents param&#xe8;tres qui gouvernent l'activit&#xe9;, ainsi que l'identit&#xe9; des interm&#xe9;diaires r&#xe9;actionnels permettant d'&#xe9;tablir les chemins r&#xe9;actionnels dans des solutions mod&#xe8;les et dans des solutions r&#xe9;elles provenant d'eaux de rin&#xe7;age de mat&#xe9;riel agricole. Divers pesticides, intens&#xe9;ment utilis&#xe9;s en agriculture, tels que l'herbicide 2,4-D (dichloro-phenoxy-acetic acid) ou des insecticides (tetrachlorvinphos, fenitrothion, pirimiphos-methyl, fenamiphos) ont &#xe9;t&#xe9; d&#xe9;grad&#xe9;s, soit sous forme d'agents actifs purs, soit formul&#xe9;s dans des produits commerciaux. Un effet b&#xe9;n&#xe9;fique de synergie a pu &#xea;tre mis en &#xe9;vidence en ajoutant du charbon actif a TiO<sub>2sub>. Nous avons &#xe9;tendu notre &#xe9;tude &#xe0; l'h&#xe9;liophotocatalyse en utilisant le photor&#xe9;acteur solaire pilote de la « Plataforma Solar de Almeria » du CIEMAT (Espagne).

sciencedirect.com/science?_ob=MImg&_imagekey=B6VKT-41Y87DV-5-N&_cdi=6131&_user=10&_orig=article&_coverDate=11%2F30%2F2000&_sk=999969993&view=c&wchp=dGLbVlW-zSkWz&md5=c93d012a7486a2b6d55ac498a37fca73&ie=/sdarticle.pdf">style="vertical-align:absmiddle;" border="0" src="http://www.sciencedirect.com/scidirimg/icon_pdf.gif" alt=""> Purchase PDF (924 K)
ss="infobubble-container">
ss="mlktLink" id="mlktLink_2">spacing=0 border=0>
style="padding: 5px 5px 0px 5px">src="/scidirimg/bullet_square.gif" alt="">science?_ob=ArticleURL&_udi=B6TGM-4D8MM4Y-3&_user=10&_origUdi=B6V74-4S7HS85-4&_fmt=high&_coverDate=11%2F15%2F2004&_rdoc=1&_orig=article&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=ea038720cdd1b94e0aa5f0e69b75a330" onMouseOver="InfoBubble.show('infobubble_2','mlktLink_2')" onMouseOut="InfoBubble.timeout()">Effect of the solvent in the liquid phase rearrangement...
Journal of Molecular Catalysis A: Chemical
ss="infobubble" id="infobubble_2" onMouseOver="InfoBubble.show('infobubble_2','mlktLink_2')" onMouseOut="InfoBubble.timeout()">spacing=0 width=100%>
src="/scidirimg/jrn_nsub.gif" alt="You are not entitled to access the full text of this document" title="You are not entitled to access the full text of this document" width=12 height=14"> sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGM-4D8MM4Y-3&_user=10&_coverDate=11%2F15%2F2004&_rdoc=1&_fmt=high&_orig=article&_cdi=5258&_sort=v&_docanchor=&view=c&_ct=5549&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=5226e06bb72bd0b32f7639d763355690">Effect of the solvent in the liquid phase rearrangement of 1,2-epoxyoctane over Al-MCM-41 and Al-TS-1 catalysts
Journal of Molecular Catalysis A: Chemical, Volume 222, Issues 1-2, 15 November 2004, Pages 167-174
Rafael van Grieken, David P. Serrano, Juan Antonio Melero, Alicia Garc&#xed;a

Abstract
ss="mlktScroll">
style="line-height:150%">

ss="h3">Graphical abstract

Effect of solvent nature in the catalytic performance of Al-containing zeolitic and mesostructured materials in the liquid phase rearrangement of 1,2-epoxyoctane is reported. The solvent polarity influences strongly on the activity and selectivity. src="http://www.sciencedirect.com/cache/MiamiImageURL/B6TGM-4D8MM4Y-3-2/0?wchp=dGLbVlW-zSkWz" class="charImg" alt="image" title="image" height="57" width="125">

The role of solvent nature in the liquid phase rearrangement of 1,2-epoxyoctane over Al-TS-1 and Al-MCM-41 catalysts is reported. The main reaction product is the aldehyde, while other rearrangement products, mainly allylic alcohols and diol are obtained. The solvent polarity influences strongly on the activity and product selectivity. The catalytic activity decreases with the increasing of solvent polarity especially for Al-MCM-41 materials. The use of acetonitrile as solvent yields a low conversion of epoxide as a consequence of its basic character. Formation of bulky by-products was detected when dimethylcarbonate was used as solvent over Al-MCM-41. Toluene displays the best catalytic performance in regards to activity and selectivity towards valuable products, with both Al-TS-1 and Al-MCM-41 catalysts, in comparison to those obtained with more polar solvents.


sciencedirect.com/science?_ob=MImg&_imagekey=B6TGM-4D8MM4Y-3-F&_cdi=5258&_user=10&_orig=article&_coverDate=11%2F15%2F2004&_sk=997779998&view=c&wchp=dGLbVlW-zSkWz&md5=3c6aca4f706f8939380d7a191213d0d9&ie=/sdarticle.pdf">style="vertical-align:absmiddle;" border="0" src="http://www.sciencedirect.com/scidirimg/icon_pdf.gif" alt=""> Purchase PDF (229 K)
ss="infobubble-container">
ss="mlktLink" id="mlktLink_3">spacing=0 border=0>
style="padding: 5px 5px 0px 5px">src="/scidirimg/bullet_square.gif" alt="">science?_ob=ArticleURL&_udi=B6TGY-4C6KT6P-1&_user=10&_origUdi=B6V74-4S7HS85-4&_fmt=high&_coverDate=07%2F15%2F2004&_rdoc=1&_orig=article&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=979feb132cfbbffc2434ffb66bb6f43e" onMouseOver="InfoBubble.show('infobubble_3','mlktLink_3')" onMouseOut="InfoBubble.timeout()">Visible light induced photocatalytic activity for degra...
Journal of Photochemistry and Photobiology A: Chemistry
ss="infobubble" id="infobubble_3" onMouseOver="InfoBubble.show('infobubble_3','mlktLink_3')" onMouseOut="InfoBubble.timeout()">spacing=0 width=100%>
src="/scidirimg/jrn_nsub.gif" alt="You are not entitled to access the full text of this document" title="You are not entitled to access the full text of this document" width=12 height=14"> sciencedirect.com/science?_ob=ArticleURL&_udi=B6TGY-4C6KT6P-1&_user=10&_coverDate=07%2F15%2F2004&_rdoc=1&_fmt=high&_orig=article&_cdi=5267&_sort=v&_docanchor=&view=c&_ct=5549&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=b7043d4b22b54c8fda8974493e887630">Visible light induced photocatalytic activity for degradation of acetaldehyde using transition metal incorporated Al-MCM-41 (aluminum doped silica zeolitic material)
Journal of Photochemistry and Photobiology A: Chemistry, Volume 165, Issues 1-3, 15 July 2004, Pages 51-58
Shalini Rodrigues, S. Uma, Igor N. Martyanov, K. J. Klabunde

Abstract
ss="mlktScroll">
style="line-height:150%">Transition metal aluminosilicates (M-Al-MCM-41) with high surface area were analyzed for photocatalytic degradation of acetaldehyde in the gas phase. The photoactivity of the catalyst under visible light irradiation is independent of the loading level of Co ions in the Co-Al-MCM-41 framework. The physical state of the transition metal oxide was characterized by XRD, IR, and diffuse reflectance studies. A high surface area with average pore diameter of 2.5 nm was obtained from BET adsorption studies. Maximal photoactivity was achieved even at low loading levels of the transition metal ion. These catalysts also exhibit good activity for degradation of acetaldehyde in the gas phase under UV light illumination.

sciencedirect.com/science?_ob=MImg&_imagekey=B6TGY-4C6KT6P-1-10&_cdi=5267&_user=10&_orig=article&_coverDate=07%2F15%2F2004&_sk=998349998&view=c&wchp=dGLbVlW-zSkWz&md5=0a1ff45447fbd8a39e5ea8734ba975a0&ie=/sdarticle.pdf">style="vertical-align:absmiddle;" border="0" src="http://www.sciencedirect.com/scidirimg/icon_pdf.gif" alt=""> Purchase PDF (164 K)
style="border-top: 1px dashed #CCCCCC; border-bottom: 1px solid #CCCCCC;background-color: #F6F6F6" width=340>spacing=0 width="100%">
style="padding:3px 5px 0px 5px">src="/scidirimg/bulletTriang.gif" alt="">science?_ob=RelatedArtURL&_udi=B6V74-4S7HS85-4&_orig=article&_acct=C000050221&_version=1&_userid=10&md5=2ddcc28d6fe07f246033cd75807b69bb">View More Related Articles
ss="nojs">style="border-left: 0px solid #CCCCCC; border-right: 0px solid #CCCCCC; border-bottom: 1px solid #CCCCCC; margin: 0px; text-align: center" onclick="toggleMLKT('B6V74-4S7HS85-4','/scidirimg/btn_arrow_up_off.gif','/scidirimg/btn_arrow_down_off.gif','http://www.sciencedirect.com/science')">src="/scidirimg/btn_arrow_up_off.gif" id="mlktArrow" alt="" border="0" onmouseover="mlktHover(1,'/scidirimg/sci_dir/')" onmouseout="mlktHover(0,'/scidirimg/')">
ss="font3">
ss="articleHeaderInner" id="articleHeader">src="/scidirimg/clear.gif" width="1" height="10" border="0" alt="">sphere.2008.02.042" target="doilink" onClick="var doiWin; doiWin=window.open('http://dx.doi.org/10.1016/j.chemosphere.2008.02.042','doilink','scrollbars=yes,resizable=yes,directories=yes,toolbar=yes,menubar=yes,status=yes'); doiWin.focus()">doi:10.1016/j.chemosphere.2008.02.042 science?_ob=HelpURL&_file=doi.htm&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a143a86ddc585c54adbe80b2046626c3" target="sdhelp" onMouseOver = "window.status='Help is Available';return true" onClick="var helpWin; helpWin=window.open('/science?_ob=HelpURL&_file=doi.htm&_acct=C000050221&_version=1&_urlVersion=0&_userid=10&md5=a143a86ddc585c54adbe80b2046626c3','sdhelp','scrollbars=yes,resizable=yes,directories=no,toolbar=no,menubar=no,status=no,width=760,height=570'); helpWin.focus()">src="/scidirimg/icon_doi.gif" width="136" height="14" alt="How to Cite or Link Using DOI (Opens New Window)" title="How to Cite or Link Using DOI (Opens New Window)" border="0" align="absmiddle">
Copyright © 2008 Elsevier Ltd All rights reserved.
ss="articleTitle">

Photocatalytic degradation of isoproturon herbicide over TiO<sub>2sub>/Al-MCM-41 composite systems using solar light

© 2004-2018 中国地质图书馆版权所有 京ICP备05064691号 京公网安备11010802017129号

地址：北京市海淀区学院路29号 邮编：100083

电话：办公室：(+86 10)66554848；文献借阅、咨询服务、科技查新：66554700