Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis
The semiconducting properties of the Scheelite CaWO4, synthesized by nitrate route, were investigated by the photocurrent technique and capacitance measurements in acidic solution (pH ~ 5). CaWO4 crystallizes in the tetragonal symmetry with a large optical gap (4.88 eV) and a low electrical conducti...
Gespeichert in:
| Veröffentlicht in: | Journal of photochemistry and photobiology. A, Chemistry. Chemistry., 2017-12, Vol.349, p.36 |
|---|---|
| Hauptverfasser: | , , |
| Format: | Artikel |
| Sprache: | eng |
| Schlagworte: | |
| Online-Zugang: | Volltext |
| Tags: |
Tag hinzufügen
Keine Tags, Fügen Sie den ersten Tag hinzu!
|
| container_end_page | |
|---|---|
| container_issue | |
| container_start_page | 36 |
| container_title | Journal of photochemistry and photobiology. A, Chemistry. |
| container_volume | 349 |
| creator | Sahmi, A Bensadok, K Trari, M |
| description | The semiconducting properties of the Scheelite CaWO4, synthesized by nitrate route, were investigated by the photocurrent technique and capacitance measurements in acidic solution (pH ~ 5). CaWO4 crystallizes in the tetragonal symmetry with a large optical gap (4.88 eV) and a low electrical conductivity (σ300K = 2.63 x 10-5 Ω-1 cm-1). The photo-electrochemical characterization shows n type semi conductivity with a wide depletion length (~110 nm). The Nyquist representation, measured in the range (10-3-105 Hz), indicates a predominant bulk contribution with a constant phase element which takes its origin from the electrode roughness. The results of CaWO4 are relevant for its applications to electro-photocatalysis. The conversion percentages of Phenobarbital reached respectively 54% and 66% with electro-catalysis and electro-photocatalysis under UV/C irradiation. The oxidation obeys to a first order kinetic with a rate constant of 1.98 x 10-3 min-1 and 2.7 x 10-3 min-1, respectively. |
| format | Article |
| fullrecord | <record><control><sourceid>proquest</sourceid><recordid>TN_cdi_proquest_journals_1981038596</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>1981038596</sourcerecordid><originalsourceid>FETCH-proquest_journals_19810385963</originalsourceid><addsrcrecordid>eNqNjk1Lw0AQhhdpwX74HwY8R3abdE2PUhRveij01rJJp2TLmll3Jod493-7QvHsad7hfYZnbtTM1I9lsbLWTnLWRhdWl_pWzZkvWuuqqsxMfb93JIQBW0nUdvjhWxcgJoqYxCMDnWHr9m8HHhqoDsBjLx2K_8ITNCP8XSQaBB_gKcaQd_HUgxBkFGKHPTUuNV4ydzUV8VebQRdG9rxU07MLjHfXuVD3L8-77WuRH_kckOV4oSH1uTqaTW10Wa83tvwf9QPkUVU_</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>1981038596</pqid></control><display><type>article</type><title>Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis</title><source>Access via ScienceDirect (Elsevier)</source><creator>Sahmi, A ; Bensadok, K ; Trari, M</creator><creatorcontrib>Sahmi, A ; Bensadok, K ; Trari, M</creatorcontrib><description>The semiconducting properties of the Scheelite CaWO4, synthesized by nitrate route, were investigated by the photocurrent technique and capacitance measurements in acidic solution (pH ~ 5). CaWO4 crystallizes in the tetragonal symmetry with a large optical gap (4.88 eV) and a low electrical conductivity (σ300K = 2.63 x 10-5 Ω-1 cm-1). The photo-electrochemical characterization shows n type semi conductivity with a wide depletion length (~110 nm). The Nyquist representation, measured in the range (10-3-105 Hz), indicates a predominant bulk contribution with a constant phase element which takes its origin from the electrode roughness. The results of CaWO4 are relevant for its applications to electro-photocatalysis. The conversion percentages of Phenobarbital reached respectively 54% and 66% with electro-catalysis and electro-photocatalysis under UV/C irradiation. The oxidation obeys to a first order kinetic with a rate constant of 1.98 x 10-3 min-1 and 2.7 x 10-3 min-1, respectively.</description><identifier>ISSN: 1010-6030</identifier><identifier>EISSN: 1873-2666</identifier><language>eng</language><publisher>Lausanne: Elsevier BV</publisher><subject>Calcium tungstates ; Capacitance ; Catalysis ; Electrical conductivity ; Electrical resistivity ; Electrochemical analysis ; Electrochemistry ; Irradiation ; Oxidation ; pH effects ; Phenobarbital ; Photocatalysis ; Photoelectric effect ; Photoelectric emission ; Scheelite ; Semiconductors ; Studies ; Ultraviolet radiation</subject><ispartof>Journal of photochemistry and photobiology. A, Chemistry., 2017-12, Vol.349, p.36</ispartof><rights>Copyright Elsevier BV Dec 1, 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><link.rule.ids>314,780,784</link.rule.ids></links><search><creatorcontrib>Sahmi, A</creatorcontrib><creatorcontrib>Bensadok, K</creatorcontrib><creatorcontrib>Trari, M</creatorcontrib><title>Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis</title><title>Journal of photochemistry and photobiology. A, Chemistry.</title><description>The semiconducting properties of the Scheelite CaWO4, synthesized by nitrate route, were investigated by the photocurrent technique and capacitance measurements in acidic solution (pH ~ 5). CaWO4 crystallizes in the tetragonal symmetry with a large optical gap (4.88 eV) and a low electrical conductivity (σ300K = 2.63 x 10-5 Ω-1 cm-1). The photo-electrochemical characterization shows n type semi conductivity with a wide depletion length (~110 nm). The Nyquist representation, measured in the range (10-3-105 Hz), indicates a predominant bulk contribution with a constant phase element which takes its origin from the electrode roughness. The results of CaWO4 are relevant for its applications to electro-photocatalysis. The conversion percentages of Phenobarbital reached respectively 54% and 66% with electro-catalysis and electro-photocatalysis under UV/C irradiation. The oxidation obeys to a first order kinetic with a rate constant of 1.98 x 10-3 min-1 and 2.7 x 10-3 min-1, respectively.</description><subject>Calcium tungstates</subject><subject>Capacitance</subject><subject>Catalysis</subject><subject>Electrical conductivity</subject><subject>Electrical resistivity</subject><subject>Electrochemical analysis</subject><subject>Electrochemistry</subject><subject>Irradiation</subject><subject>Oxidation</subject><subject>pH effects</subject><subject>Phenobarbital</subject><subject>Photocatalysis</subject><subject>Photoelectric effect</subject><subject>Photoelectric emission</subject><subject>Scheelite</subject><subject>Semiconductors</subject><subject>Studies</subject><subject>Ultraviolet radiation</subject><issn>1010-6030</issn><issn>1873-2666</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNjk1Lw0AQhhdpwX74HwY8R3abdE2PUhRveij01rJJp2TLmll3Jod493-7QvHsad7hfYZnbtTM1I9lsbLWTnLWRhdWl_pWzZkvWuuqqsxMfb93JIQBW0nUdvjhWxcgJoqYxCMDnWHr9m8HHhqoDsBjLx2K_8ITNCP8XSQaBB_gKcaQd_HUgxBkFGKHPTUuNV4ydzUV8VebQRdG9rxU07MLjHfXuVD3L8-77WuRH_kckOV4oSH1uTqaTW10Wa83tvwf9QPkUVU_</recordid><startdate>20171201</startdate><enddate>20171201</enddate><creator>Sahmi, A</creator><creator>Bensadok, K</creator><creator>Trari, M</creator><general>Elsevier BV</general><scope>7QL</scope><scope>7T7</scope><scope>7U9</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>H94</scope><scope>M7N</scope><scope>P64</scope></search><sort><creationdate>20171201</creationdate><title>Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis</title><author>Sahmi, A ; Bensadok, K ; Trari, M</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-proquest_journals_19810385963</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Calcium tungstates</topic><topic>Capacitance</topic><topic>Catalysis</topic><topic>Electrical conductivity</topic><topic>Electrical resistivity</topic><topic>Electrochemical analysis</topic><topic>Electrochemistry</topic><topic>Irradiation</topic><topic>Oxidation</topic><topic>pH effects</topic><topic>Phenobarbital</topic><topic>Photocatalysis</topic><topic>Photoelectric effect</topic><topic>Photoelectric emission</topic><topic>Scheelite</topic><topic>Semiconductors</topic><topic>Studies</topic><topic>Ultraviolet radiation</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Sahmi, A</creatorcontrib><creatorcontrib>Bensadok, K</creatorcontrib><creatorcontrib>Trari, M</creatorcontrib><collection>Bacteriology Abstracts (Microbiology B)</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Virology and AIDS Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>AIDS and Cancer Research Abstracts</collection><collection>Algology Mycology and Protozoology Abstracts (Microbiology C)</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Journal of photochemistry and photobiology. A, Chemistry.</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Sahmi, A</au><au>Bensadok, K</au><au>Trari, M</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis</atitle><jtitle>Journal of photochemistry and photobiology. A, Chemistry.</jtitle><date>2017-12-01</date><risdate>2017</risdate><volume>349</volume><spage>36</spage><pages>36-</pages><issn>1010-6030</issn><eissn>1873-2666</eissn><abstract>The semiconducting properties of the Scheelite CaWO4, synthesized by nitrate route, were investigated by the photocurrent technique and capacitance measurements in acidic solution (pH ~ 5). CaWO4 crystallizes in the tetragonal symmetry with a large optical gap (4.88 eV) and a low electrical conductivity (σ300K = 2.63 x 10-5 Ω-1 cm-1). The photo-electrochemical characterization shows n type semi conductivity with a wide depletion length (~110 nm). The Nyquist representation, measured in the range (10-3-105 Hz), indicates a predominant bulk contribution with a constant phase element which takes its origin from the electrode roughness. The results of CaWO4 are relevant for its applications to electro-photocatalysis. The conversion percentages of Phenobarbital reached respectively 54% and 66% with electro-catalysis and electro-photocatalysis under UV/C irradiation. The oxidation obeys to a first order kinetic with a rate constant of 1.98 x 10-3 min-1 and 2.7 x 10-3 min-1, respectively.</abstract><cop>Lausanne</cop><pub>Elsevier BV</pub></addata></record> |
| fulltext | fulltext |
| identifier | ISSN: 1010-6030 |
| ispartof | Journal of photochemistry and photobiology. A, Chemistry., 2017-12, Vol.349, p.36 |
| issn | 1010-6030 1873-2666 |
| language | eng |
| recordid | cdi_proquest_journals_1981038596 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Calcium tungstates Capacitance Catalysis Electrical conductivity Electrical resistivity Electrochemical analysis Electrochemistry Irradiation Oxidation pH effects Phenobarbital Photocatalysis Photoelectric effect Photoelectric emission Scheelite Semiconductors Studies Ultraviolet radiation |
| title | Photoelectrochemical properties of CaWO^sub 4^ synthetized by chemical route. Application to the phenobarbital electro-photocatalysis |
| url | https://sfx.bib-bvb.de/sfx_tum?ctx_ver=Z39.88-2004&ctx_enc=info:ofi/enc:UTF-8&ctx_tim=2024-12-25T00%3A27%3A49IST&url_ver=Z39.88-2004&url_ctx_fmt=infofi/fmt:kev:mtx:ctx&rfr_id=info:sid/primo.exlibrisgroup.com:primo3-Article-proquest&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.genre=article&rft.atitle=Photoelectrochemical%20properties%20of%20CaWO%5Esub%204%5E%20synthetized%20by%20chemical%20route.%20Application%20to%20the%20phenobarbital%20electro-photocatalysis&rft.jtitle=Journal%20of%20photochemistry%20and%20photobiology.%20A,%20Chemistry.&rft.au=Sahmi,%20A&rft.date=2017-12-01&rft.volume=349&rft.spage=36&rft.pages=36-&rft.issn=1010-6030&rft.eissn=1873-2666&rft_id=info:doi/&rft_dat=%3Cproquest%3E1981038596%3C/proquest%3E%3Curl%3E%3C/url%3E&disable_directlink=true&sfx.directlink=off&sfx.report_link=0&rft_id=info:oai/&rft_pqid=1981038596&rft_id=info:pmid/&rfr_iscdi=true |