A novel process for synthesis of CdSe/ZnS core-shell QDs and their application for the Methyl orange (MO) degradation
CdSe/ZnS core-shell quantum dots (QDs) were prepared using combination of microwave irradiation and photochemical synthesis of sulfur based material. Versatile analyses of X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Transmission electron microscopy (TEM), Photoluminescence (PL) and...
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| Veröffentlicht in: | Materials chemistry and physics 2017-11, Vol.201, p.165-169 |
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| creator | Mehrjoo, M. Molaei, M. Karimipour, M. |
| description | CdSe/ZnS core-shell quantum dots (QDs) were prepared using combination of microwave irradiation and photochemical synthesis of sulfur based material. Versatile analyses of X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Transmission electron microscopy (TEM), Photoluminescence (PL) and UV–Visible (UV–Vis) spectroscopy were employed to verify the formation of core-shell structure at nanoscale. Due to the growth of ZnS as shell, trap state emission of CdSe cores quenched significantly and the fundamental band gap emission of CdSe QDs with FWHM of above 36 nm was clarified as an evidence of the formation of core-shell structure. Moreover, the results revealed that CdSe/ZnS QDsshow superior photocatalytic activity rather than CdSe QDsfor photo-degradation of Methyl orange (MO).
•CdSe/ZnS QDs were synthesized by a combination of microwave and photochemical approaches.•Trap state emission of CdSe cores quenched significantly after ZnS shell growth.•CdSe/ZnS QDs show superior photocatalytic activity rather than CdSe QDs. |
| doi_str_mv | 10.1016/j.matchemphys.2017.08.033 |
| format | Article |
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•CdSe/ZnS QDs were synthesized by a combination of microwave and photochemical approaches.•Trap state emission of CdSe cores quenched significantly after ZnS shell growth.•CdSe/ZnS QDs show superior photocatalytic activity rather than CdSe QDs.</description><identifier>ISSN: 0254-0584</identifier><identifier>EISSN: 1879-3312</identifier><identifier>DOI: 10.1016/j.matchemphys.2017.08.033</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Cadmium selenides ; Catalytic activity ; CdSe/ZnS ; Chemical synthesis ; Core-shell structure ; Degradation ; Dyes ; Electron microscopy ; Fourier transforms ; Infrared analysis ; Luminescence ; Photocatalysis ; Photocatalytic ; Photoluminescence ; Quantum dots ; Quenching ; X-ray diffraction ; Zinc sulfide</subject><ispartof>Materials chemistry and physics, 2017-11, Vol.201, p.165-169</ispartof><rights>2017 Elsevier B.V.</rights><rights>Copyright Elsevier BV Nov 1, 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c349t-c034a7dbdbc487ed93d5bec4b5c071f49a1cd47cf9a31be7eb7774fc86f28b5f3</citedby><cites>FETCH-LOGICAL-c349t-c034a7dbdbc487ed93d5bec4b5c071f49a1cd47cf9a31be7eb7774fc86f28b5f3</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.matchemphys.2017.08.033$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Mehrjoo, M.</creatorcontrib><creatorcontrib>Molaei, M.</creatorcontrib><creatorcontrib>Karimipour, M.</creatorcontrib><title>A novel process for synthesis of CdSe/ZnS core-shell QDs and their application for the Methyl orange (MO) degradation</title><title>Materials chemistry and physics</title><description>CdSe/ZnS core-shell quantum dots (QDs) were prepared using combination of microwave irradiation and photochemical synthesis of sulfur based material. Versatile analyses of X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Transmission electron microscopy (TEM), Photoluminescence (PL) and UV–Visible (UV–Vis) spectroscopy were employed to verify the formation of core-shell structure at nanoscale. Due to the growth of ZnS as shell, trap state emission of CdSe cores quenched significantly and the fundamental band gap emission of CdSe QDs with FWHM of above 36 nm was clarified as an evidence of the formation of core-shell structure. Moreover, the results revealed that CdSe/ZnS QDsshow superior photocatalytic activity rather than CdSe QDsfor photo-degradation of Methyl orange (MO).
•CdSe/ZnS QDs were synthesized by a combination of microwave and photochemical approaches.•Trap state emission of CdSe cores quenched significantly after ZnS shell growth.•CdSe/ZnS QDs show superior photocatalytic activity rather than CdSe QDs.</description><subject>Cadmium selenides</subject><subject>Catalytic activity</subject><subject>CdSe/ZnS</subject><subject>Chemical synthesis</subject><subject>Core-shell structure</subject><subject>Degradation</subject><subject>Dyes</subject><subject>Electron microscopy</subject><subject>Fourier transforms</subject><subject>Infrared analysis</subject><subject>Luminescence</subject><subject>Photocatalysis</subject><subject>Photocatalytic</subject><subject>Photoluminescence</subject><subject>Quantum dots</subject><subject>Quenching</subject><subject>X-ray diffraction</subject><subject>Zinc sulfide</subject><issn>0254-0584</issn><issn>1879-3312</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNqNkMtOwzAQRS0EEuXxD0ZsYJFgx06dLFF5SlQVAjZsLMceE1dpHOy0Uv8eQ1mwZDXS6Nw7moPQGSU5JXR6tcxXatQtrIZ2G_OCUJGTKieM7aEJrUSdMUaLfTQhRckzUlb8EB3FuCQJpJRN0Poa934DHR6C1xAjtj7guO3HFqKL2Fs8My9w9d6_YO0DZLGFrsPPNxGr3uBEuYDVMHROq9H5_ieetngOY7vtsA-q_wB8MV9cYgMfQZkf7AQdWNVFOP2dx-jt7vZ19pA9Le4fZ9dPmWa8HjNNGFfCNKbRvBJgambKBjRvSk0EtbxWVBsutK0Vow0IaIQQ3OpqaouqKS07Rue73vTd5xriKJd-Hfp0UtJ6WnFSkKlIVL2jdPAxBrByCG6lwlZSIr8ty6X8Y1l-W5akkslyys52WUhvbBwEGbWDXoNxAfQojXf_aPkC_zuNow</recordid><startdate>20171101</startdate><enddate>20171101</enddate><creator>Mehrjoo, M.</creator><creator>Molaei, M.</creator><creator>Karimipour, M.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20171101</creationdate><title>A novel process for synthesis of CdSe/ZnS core-shell QDs and their application for the Methyl orange (MO) degradation</title><author>Mehrjoo, M. ; Molaei, M. ; Karimipour, M.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c349t-c034a7dbdbc487ed93d5bec4b5c071f49a1cd47cf9a31be7eb7774fc86f28b5f3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Cadmium selenides</topic><topic>Catalytic activity</topic><topic>CdSe/ZnS</topic><topic>Chemical synthesis</topic><topic>Core-shell structure</topic><topic>Degradation</topic><topic>Dyes</topic><topic>Electron microscopy</topic><topic>Fourier transforms</topic><topic>Infrared analysis</topic><topic>Luminescence</topic><topic>Photocatalysis</topic><topic>Photocatalytic</topic><topic>Photoluminescence</topic><topic>Quantum dots</topic><topic>Quenching</topic><topic>X-ray diffraction</topic><topic>Zinc sulfide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Mehrjoo, M.</creatorcontrib><creatorcontrib>Molaei, M.</creatorcontrib><creatorcontrib>Karimipour, M.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Materials chemistry and physics</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Mehrjoo, M.</au><au>Molaei, M.</au><au>Karimipour, M.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>A novel process for synthesis of CdSe/ZnS core-shell QDs and their application for the Methyl orange (MO) degradation</atitle><jtitle>Materials chemistry and physics</jtitle><date>2017-11-01</date><risdate>2017</risdate><volume>201</volume><spage>165</spage><epage>169</epage><pages>165-169</pages><issn>0254-0584</issn><eissn>1879-3312</eissn><abstract>CdSe/ZnS core-shell quantum dots (QDs) were prepared using combination of microwave irradiation and photochemical synthesis of sulfur based material. Versatile analyses of X-ray diffraction (XRD), Fourier transform-infrared (FT-IR), Transmission electron microscopy (TEM), Photoluminescence (PL) and UV–Visible (UV–Vis) spectroscopy were employed to verify the formation of core-shell structure at nanoscale. Due to the growth of ZnS as shell, trap state emission of CdSe cores quenched significantly and the fundamental band gap emission of CdSe QDs with FWHM of above 36 nm was clarified as an evidence of the formation of core-shell structure. Moreover, the results revealed that CdSe/ZnS QDsshow superior photocatalytic activity rather than CdSe QDsfor photo-degradation of Methyl orange (MO).
•CdSe/ZnS QDs were synthesized by a combination of microwave and photochemical approaches.•Trap state emission of CdSe cores quenched significantly after ZnS shell growth.•CdSe/ZnS QDs show superior photocatalytic activity rather than CdSe QDs.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.matchemphys.2017.08.033</doi><tpages>5</tpages></addata></record> |
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| ispartof | Materials chemistry and physics, 2017-11, Vol.201, p.165-169 |
| issn | 0254-0584 1879-3312 |
| language | eng |
| recordid | cdi_proquest_journals_1968402067 |
| source | Access via ScienceDirect (Elsevier) |
| subjects | Cadmium selenides Catalytic activity CdSe/ZnS Chemical synthesis Core-shell structure Degradation Dyes Electron microscopy Fourier transforms Infrared analysis Luminescence Photocatalysis Photocatalytic Photoluminescence Quantum dots Quenching X-ray diffraction Zinc sulfide |
| title | A novel process for synthesis of CdSe/ZnS core-shell QDs and their application for the Methyl orange (MO) degradation |
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