LrgpV1, Main, Exploration, bibRecord, 000579

A NEW Cu:ZnS/TiO2 PHOTOCATALYST FOR THE DEGRADATION OF SALICYLIC ACID IN AQUEOUS SOLUTION

Identifieur interne : 000579 ( Main/Exploration ); précédent : 000578; suivant : 000580

A NEW Cu:ZnS/TiO2 PHOTOCATALYST FOR THE DEGRADATION OF SALICYLIC ACID IN AQUEOUS SOLUTION

Auteurs : Labiadh Houcine [Tunisie] ; Becheikh Nidhal [France] ; Serge Corbel [France] ; Lavinia Balan [France] ; Chabane Tahar Ben [Tunisie] ; Raphaël Schneider [France]

Source :

RBID : Hal:hal-00819019

Abstract

In recent years, purification and stabilization of environmental waste by titanium dioxide (TiO2) photocatalysis has gained increasing attention due to its biological and chemical inertness and strong oxidizing power. Recently, metal-sulfide like ZnS and CdS have been intensively studied because of their unique catalytic functions compared to TiO2. Association of ZnS to TiO2 enhances charge separation and minimizes or inhibits charge-carrier recombination. When both semiconductors are illuminated, electrons accumulate at the low-lying conduction band of one semiconductor while holes accumulate at the valence band of the other material. These processes of charge separation are very fast and the efficiency of reduction or oxidation of the adsorbed organics remarkably increases. To further improve the photoefficiency of these processes as well as the response into the visible part of the spectrum, doping with transition metal like copper can also be undertaken. Indeed, copper can efficiently trap charge carriers and thus reduce electron-hole recombination. On the basis of these considerations, in this work we report a study concerning the use of a Cu-doped ZnS/TiO2 nanocatalysts immobilized in a microreactor for the degradation of salicylic acid.

Url:

https://hal.archives-ouvertes.fr/hal-00819019

Affiliations:

Links toward previous steps (curation, corpus...)

to stream Hal, to step Corpus: 000012
to stream Hal, to step Curation: 000012
to stream Hal, to step Checkpoint: 000559
to stream Main, to step Merge: 000615
to stream Main, to step Curation: 000579

Le document en format XML

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<ref type="url">http://www.univ-lorraine.fr/</ref>
</desc>
</org>
</tutelle>
<tutelle name="UMR7274" active="#struct-441569" type="direct"><org type="institution" xml:id="struct-441569" status="VALID"><idno type="ISNI">0000000122597504</idno>
<idno type="IdRef">02636817X</idno>
<orgName>Centre National de la Recherche Scientifique</orgName>
<orgName type="acronym">CNRS</orgName>
<date type="start">1939-10-19</date>
<desc><address><country key="FR"></country>
</address>
<ref type="url">http://www.cnrs.fr/</ref>
</desc>
</org>
</tutelle>
</tutelles>
</hal:affiliation>
<country>France</country>
<placeName><settlement type="city">Nancy</settlement>
<settlement type="city">Metz</settlement>
<region type="region" nuts="2">Grand Est</region>
<region type="old region" nuts="2">Lorraine (région)</region>
</placeName>
<orgName type="university">Université de Lorraine</orgName>
</affiliation>
</author>
</analytic>
</biblStruct>
</sourceDesc>
</fileDesc>
<profileDesc><textClass><keywords scheme="mix" xml:lang="pt"><term>Cu-doped ZnS</term>
<term>photocatalysis</term>
<term>quantum dots</term>
<term>titanium oxide</term>
</keywords>
</textClass>
</profileDesc>
</teiHeader>
<front><div type="abstract" xml:lang="en">In recent years, purification and stabilization of environmental waste by titanium dioxide (TiO2) photocatalysis has gained increasing attention due to its biological and chemical inertness and strong oxidizing power. Recently, metal-sulfide like ZnS and CdS have been intensively studied because of their unique catalytic functions compared to TiO2. Association of ZnS to TiO2 enhances charge separation and minimizes or inhibits charge-carrier recombination. When both semiconductors are illuminated, electrons accumulate at the low-lying conduction band of one semiconductor while holes accumulate at the valence band of the other material. These processes of charge separation are very fast and the efficiency of reduction or oxidation of the adsorbed organics remarkably increases. To further improve the photoefficiency of these processes as well as the response into the visible part of the spectrum, doping with transition metal like copper can also be undertaken. Indeed, copper can efficiently trap charge carriers and thus reduce electron-hole recombination. On the basis of these considerations, in this work we report a study concerning the use of a Cu-doped ZnS/TiO2 nanocatalysts immobilized in a microreactor for the degradation of salicylic acid.</div>
</front>
</TEI>
<affiliations><list><country><li>France</li>
<li>Tunisie</li>
</country>
<region><li>Grand Est</li>
<li>Lorraine (région)</li>
</region>
<settlement><li>Metz</li>
<li>Nancy</li>
</settlement>
<orgName><li>Centre national de la recherche scientifique</li>
<li>Laboratoire réactions et génie des procédés</li>
<li>Université de Lorraine</li>
</orgName>
</list>
<tree><country name="Tunisie"><noRegion><name sortKey="Houcine, Labiadh" sort="Houcine, Labiadh" uniqKey="Houcine L" first="Labiadh" last="Houcine">Labiadh Houcine</name>
</noRegion>
<name sortKey="Tahar Ben, Chabane" sort="Tahar Ben, Chabane" uniqKey="Tahar Ben C" first="Chabane" last="Tahar Ben">Chabane Tahar Ben</name>
</country>
<country name="France"><region name="Grand Est"><name sortKey="Nidhal, Becheikh" sort="Nidhal, Becheikh" uniqKey="Nidhal B" first="Becheikh" last="Nidhal">Becheikh Nidhal</name>
</region>
<name sortKey="Balan, Lavinia" sort="Balan, Lavinia" uniqKey="Balan L" first="Lavinia" last="Balan">Lavinia Balan</name>
<name sortKey="Corbel, Serge" sort="Corbel, Serge" uniqKey="Corbel S" first="Serge" last="Corbel">Serge Corbel</name>
<name sortKey="Schneider, Raphael" sort="Schneider, Raphael" uniqKey="Schneider R" first="Raphaël" last="Schneider">Raphaël Schneider</name>
</country>
</tree>
</affiliations>
</record>

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A NEW Cu:ZnS/TiO2 PHOTOCATALYST FOR THE DEGRADATION OF SALICYLIC ACID IN AQUEOUS SOLUTION

A NEW Cu:ZnS/TiO2 PHOTOCATALYST FOR THE DEGRADATION OF SALICYLIC ACID IN AQUEOUS SOLUTION

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