Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes
[Display omitted] •Graphene quantum dots/polyacrylonitrile membranes were prepared by electrospinning.•GQD-PAN filters are turn-off fluorescence sensors for free chlorine detection.•Membranes have fast sensing response to chlorine concentration (10–600 μM range).•Filters show high sensitivity (DL = ...
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| Veröffentlicht in: | Sensors and actuators. B, Chemical Chemical, 2018-06, Vol.262, p.902-912 |
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| container_title | Sensors and actuators. B, Chemical |
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| creator | Ruiz, Virginia Pérez-Marquez, Ana Maudes, Jon Grande, Hans-Jürgen Murillo, Nieves |
| description | [Display omitted]
•Graphene quantum dots/polyacrylonitrile membranes were prepared by electrospinning.•GQD-PAN filters are turn-off fluorescence sensors for free chlorine detection.•Membranes have fast sensing response to chlorine concentration (10–600 μM range).•Filters show high sensitivity (DL = 2 μM detection limit), reproducibility ( |
| doi_str_mv | 10.1016/j.snb.2018.02.081 |
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•Graphene quantum dots/polyacrylonitrile membranes were prepared by electrospinning.•GQD-PAN filters are turn-off fluorescence sensors for free chlorine detection.•Membranes have fast sensing response to chlorine concentration (10–600 μM range).•Filters show high sensitivity (DL = 2 μM detection limit), reproducibility (<5% RSD) and selectivity.•Filters sensing response was stable after months immersed in buffer solutions.
We report a method to encapsulate graphene quantum dots (GQD) in polyacrylonitrile (PAN) nanofibrous membranes to manufacture robust filtering membranes by electrospinning. GQD-PAN membranes with different nanofiber diameter were prepared tuning the electrospinning parameters, all exhibiting the characteristic fluorescence fingerprint of the GQD probes. The photoluminescence (PL) stability of GQD embedded in the PAN fibers was significantly enhanced with respect to that of water dispersed GQD luminescent probes. The PL of GQD-PAN filtering membranes showed remarkable time stability, both stored dry and immersed in phosphate buffer solutions (PBS), as well as exposed to continuous light irradiation. However, the PL intensity of GQD-PAN membranes was irreversibly quenched by highly oxidant free chlorine solutions. Thus, electrospun GQD-PAN membranes exhibited excellent performance as turn-off fluorescence sensing platforms for free chlorine detection in PBS 0.1 M pH 7. The analytical performance of GQD-PAN membranes was comparable to that of GQD solutions with optimal concentrations, displaying a fast (no need of incubation time) and linear response to chlorine concentration in the 10–600 μM range, a low detection limit of 2 μM, high sensitivity, reproducibility and selectivity. Moreover, the sensing performance of the membranes was very stable after being immersed in PBS for months, outperforming the stability of GQD solutions.</description><identifier>ISSN: 0925-4005</identifier><identifier>EISSN: 1873-3077</identifier><identifier>DOI: 10.1016/j.snb.2018.02.081</identifier><language>eng</language><publisher>Lausanne: Elsevier B.V</publisher><subject>Buffer solutions ; Chlorine ; Chlorine detection ; Detection ; Electrospinning ; Encapsulation ; Filtration ; Fluorescence ; Fluorescence sensor ; Graphene ; Graphene quantum dots ; Light irradiation ; Luminous intensity ; Mathematical analysis ; Membranes ; Nanofibers ; Photoluminescence ; Polyacrylonitrile ; Quantum dots ; Reproducibility ; Sensitivity analysis ; Stability ; Studies ; Water purification</subject><ispartof>Sensors and actuators. B, Chemical, 2018-06, Vol.262, p.902-912</ispartof><rights>2018 Elsevier B.V.</rights><rights>Copyright Elsevier Science Ltd. Jun 1, 2018</rights><lds50>peer_reviewed</lds50><oa>free_for_read</oa><woscitedreferencessubscribed>false</woscitedreferencessubscribed><citedby>FETCH-LOGICAL-c405t-eae41564ed8cc9aad367eb0b1ca7b8494ef2cd3f563754e53cf37d6c76e153643</citedby><cites>FETCH-LOGICAL-c405t-eae41564ed8cc9aad367eb0b1ca7b8494ef2cd3f563754e53cf37d6c76e153643</cites></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.snb.2018.02.081$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,777,781,3537,27905,27906,45976</link.rule.ids></links><search><creatorcontrib>Ruiz, Virginia</creatorcontrib><creatorcontrib>Pérez-Marquez, Ana</creatorcontrib><creatorcontrib>Maudes, Jon</creatorcontrib><creatorcontrib>Grande, Hans-Jürgen</creatorcontrib><creatorcontrib>Murillo, Nieves</creatorcontrib><title>Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes</title><title>Sensors and actuators. B, Chemical</title><description>[Display omitted]
•Graphene quantum dots/polyacrylonitrile membranes were prepared by electrospinning.•GQD-PAN filters are turn-off fluorescence sensors for free chlorine detection.•Membranes have fast sensing response to chlorine concentration (10–600 μM range).•Filters show high sensitivity (DL = 2 μM detection limit), reproducibility (<5% RSD) and selectivity.•Filters sensing response was stable after months immersed in buffer solutions.
We report a method to encapsulate graphene quantum dots (GQD) in polyacrylonitrile (PAN) nanofibrous membranes to manufacture robust filtering membranes by electrospinning. GQD-PAN membranes with different nanofiber diameter were prepared tuning the electrospinning parameters, all exhibiting the characteristic fluorescence fingerprint of the GQD probes. The photoluminescence (PL) stability of GQD embedded in the PAN fibers was significantly enhanced with respect to that of water dispersed GQD luminescent probes. The PL of GQD-PAN filtering membranes showed remarkable time stability, both stored dry and immersed in phosphate buffer solutions (PBS), as well as exposed to continuous light irradiation. However, the PL intensity of GQD-PAN membranes was irreversibly quenched by highly oxidant free chlorine solutions. Thus, electrospun GQD-PAN membranes exhibited excellent performance as turn-off fluorescence sensing platforms for free chlorine detection in PBS 0.1 M pH 7. The analytical performance of GQD-PAN membranes was comparable to that of GQD solutions with optimal concentrations, displaying a fast (no need of incubation time) and linear response to chlorine concentration in the 10–600 μM range, a low detection limit of 2 μM, high sensitivity, reproducibility and selectivity. Moreover, the sensing performance of the membranes was very stable after being immersed in PBS for months, outperforming the stability of GQD solutions.</description><subject>Buffer solutions</subject><subject>Chlorine</subject><subject>Chlorine detection</subject><subject>Detection</subject><subject>Electrospinning</subject><subject>Encapsulation</subject><subject>Filtration</subject><subject>Fluorescence</subject><subject>Fluorescence sensor</subject><subject>Graphene</subject><subject>Graphene quantum dots</subject><subject>Light irradiation</subject><subject>Luminous intensity</subject><subject>Mathematical analysis</subject><subject>Membranes</subject><subject>Nanofibers</subject><subject>Photoluminescence</subject><subject>Polyacrylonitrile</subject><subject>Quantum dots</subject><subject>Reproducibility</subject><subject>Sensitivity analysis</subject><subject>Stability</subject><subject>Studies</subject><subject>Water purification</subject><issn>0925-4005</issn><issn>1873-3077</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2018</creationdate><recordtype>article</recordtype><recordid>eNp9kMtq3DAUhkVpoNMkD5CdoGu7R9bFHroqIb1AoJt2LWT5KKPBlhxJLsyL9HkrM113dTb_7XyEPDBoGTD18dzmMLYdsKGFroWBvSEHNvS84dD3b8kBjp1sBIB8R97nfAYAwRUcyJ-ncDLB4kTXUywxFzP62ZcLNWGiGUP24YWumFxMy66j0dGXZNYTBqSvmwllW-gUS6YYrFnzNptSw3ygOKMtKeZ1C3SN88XYdJlj8CX5GWkwITo_prhl6vxcMO1FCy5jMgHzHblxZs54_-_ekl9fnn4-fmuef3z9_vj5ubECZGnQoGBSCZwGa4_GTFz1OMLIrOnHQRwFus5O3EnFeylQcut4PynbK2SSK8FvyYdr7pri64a56HPcUqiVugMlO9lxUFXFripb_8kJnV6TX0y6aAZ6x6_PuuLXO34Nna74q-fT1YN1_m-PSWfrcSftUwWjp-j_4_4LcY6TQg</recordid><startdate>20180601</startdate><enddate>20180601</enddate><creator>Ruiz, Virginia</creator><creator>Pérez-Marquez, Ana</creator><creator>Maudes, Jon</creator><creator>Grande, Hans-Jürgen</creator><creator>Murillo, Nieves</creator><general>Elsevier B.V</general><general>Elsevier Science Ltd</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SP</scope><scope>7SR</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>FR3</scope><scope>JG9</scope><scope>L7M</scope></search><sort><creationdate>20180601</creationdate><title>Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes</title><author>Ruiz, Virginia ; Pérez-Marquez, Ana ; Maudes, Jon ; Grande, Hans-Jürgen ; Murillo, Nieves</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c405t-eae41564ed8cc9aad367eb0b1ca7b8494ef2cd3f563754e53cf37d6c76e153643</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2018</creationdate><topic>Buffer solutions</topic><topic>Chlorine</topic><topic>Chlorine detection</topic><topic>Detection</topic><topic>Electrospinning</topic><topic>Encapsulation</topic><topic>Filtration</topic><topic>Fluorescence</topic><topic>Fluorescence sensor</topic><topic>Graphene</topic><topic>Graphene quantum dots</topic><topic>Light irradiation</topic><topic>Luminous intensity</topic><topic>Mathematical analysis</topic><topic>Membranes</topic><topic>Nanofibers</topic><topic>Photoluminescence</topic><topic>Polyacrylonitrile</topic><topic>Quantum dots</topic><topic>Reproducibility</topic><topic>Sensitivity analysis</topic><topic>Stability</topic><topic>Studies</topic><topic>Water purification</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Ruiz, Virginia</creatorcontrib><creatorcontrib>Pérez-Marquez, Ana</creatorcontrib><creatorcontrib>Maudes, Jon</creatorcontrib><creatorcontrib>Grande, Hans-Jürgen</creatorcontrib><creatorcontrib>Murillo, Nieves</creatorcontrib><collection>CrossRef</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Engineering Research Database</collection><collection>Materials Research Database</collection><collection>Advanced Technologies Database with Aerospace</collection><jtitle>Sensors and actuators. B, Chemical</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Ruiz, Virginia</au><au>Pérez-Marquez, Ana</au><au>Maudes, Jon</au><au>Grande, Hans-Jürgen</au><au>Murillo, Nieves</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes</atitle><jtitle>Sensors and actuators. B, Chemical</jtitle><date>2018-06-01</date><risdate>2018</risdate><volume>262</volume><spage>902</spage><epage>912</epage><pages>902-912</pages><issn>0925-4005</issn><eissn>1873-3077</eissn><abstract>[Display omitted]
•Graphene quantum dots/polyacrylonitrile membranes were prepared by electrospinning.•GQD-PAN filters are turn-off fluorescence sensors for free chlorine detection.•Membranes have fast sensing response to chlorine concentration (10–600 μM range).•Filters show high sensitivity (DL = 2 μM detection limit), reproducibility (<5% RSD) and selectivity.•Filters sensing response was stable after months immersed in buffer solutions.
We report a method to encapsulate graphene quantum dots (GQD) in polyacrylonitrile (PAN) nanofibrous membranes to manufacture robust filtering membranes by electrospinning. GQD-PAN membranes with different nanofiber diameter were prepared tuning the electrospinning parameters, all exhibiting the characteristic fluorescence fingerprint of the GQD probes. The photoluminescence (PL) stability of GQD embedded in the PAN fibers was significantly enhanced with respect to that of water dispersed GQD luminescent probes. The PL of GQD-PAN filtering membranes showed remarkable time stability, both stored dry and immersed in phosphate buffer solutions (PBS), as well as exposed to continuous light irradiation. However, the PL intensity of GQD-PAN membranes was irreversibly quenched by highly oxidant free chlorine solutions. Thus, electrospun GQD-PAN membranes exhibited excellent performance as turn-off fluorescence sensing platforms for free chlorine detection in PBS 0.1 M pH 7. The analytical performance of GQD-PAN membranes was comparable to that of GQD solutions with optimal concentrations, displaying a fast (no need of incubation time) and linear response to chlorine concentration in the 10–600 μM range, a low detection limit of 2 μM, high sensitivity, reproducibility and selectivity. Moreover, the sensing performance of the membranes was very stable after being immersed in PBS for months, outperforming the stability of GQD solutions.</abstract><cop>Lausanne</cop><pub>Elsevier B.V</pub><doi>10.1016/j.snb.2018.02.081</doi><tpages>11</tpages><oa>free_for_read</oa></addata></record> |
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| subjects | Buffer solutions Chlorine Chlorine detection Detection Electrospinning Encapsulation Filtration Fluorescence Fluorescence sensor Graphene Graphene quantum dots Light irradiation Luminous intensity Mathematical analysis Membranes Nanofibers Photoluminescence Polyacrylonitrile Quantum dots Reproducibility Sensitivity analysis Stability Studies Water purification |
| title | Enhanced photostability and sensing performance of graphene quantum dots encapsulated in electrospun polyacrylonitrile nanofibrous filtering membranes |
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