Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites
BACKGROUND Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promisi...
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| Veröffentlicht in: | Journal of chemical technology and biotechnology (1986) 2019-12, Vol.94 (12), p.3905-3914 |
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| container_title | Journal of chemical technology and biotechnology (1986) |
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| creator | Berberidou, Chrysanthi Kyzas, George Z Paspaltsis, Ioannis Sklaviadis, Theodoros Poulios, Ioannis |
| description | BACKGROUND
Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions.
RESULTS
The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS.
CONCLUSIONS
These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry |
| doi_str_mv | 10.1002/jctb.6188 |
| format | Article |
| fullrecord | <record><control><sourceid>proquest_wiley</sourceid><recordid>TN_cdi_proquest_journals_2312227863</recordid><sourceformat>XML</sourceformat><sourcesystem>PC</sourcesystem><sourcerecordid>2312227863</sourcerecordid><originalsourceid>FETCH-LOGICAL-g2608-afa2bea2dafea2d8dc55c33476b6667bbd9f54a093db1590e83de41de5b391ab3</originalsourceid><addsrcrecordid>eNotkMtOwzAQRS0EEqWw4A8ssQ71I3GcJVQ8VaksytryY9y6SuOQOCr5exqVzcxodHSvdBC6p-SREsIWe5vMo6BSXqAZJVWZ5UKQSzQjTMiMFWVxjW76fk8IEZKJGfJfu5ii1UnXYwoWu9CHxoNNITZYNw63Qxd8OAHTI3p81Ak6DIe2jmNotrgDN1hweNvpdgcN4PgbHCw2Yc2wjYc29iFBf4uuvK57uPvfc_T9-rJZvmer9dvH8mmVbZkgMtNeMwOaOe2nKZ0tCst5XgojhCiNcZUvck0q7gwtKgKSO8ipg8LwimrD5-jhnNt28WeAPql9HLrmVKkYp4yxUgp-ohZn6hhqGFXbhYPuRkWJmhyqyaGaHKrP5eZ5OvgfqzhplA</addsrcrecordid><sourcetype>Aggregation Database</sourcetype><iscdi>true</iscdi><recordtype>article</recordtype><pqid>2312227863</pqid></control><display><type>article</type><title>Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites</title><source>Access via Wiley Online Library</source><creator>Berberidou, Chrysanthi ; Kyzas, George Z ; Paspaltsis, Ioannis ; Sklaviadis, Theodoros ; Poulios, Ioannis</creator><creatorcontrib>Berberidou, Chrysanthi ; Kyzas, George Z ; Paspaltsis, Ioannis ; Sklaviadis, Theodoros ; Poulios, Ioannis</creatorcontrib><description>BACKGROUND
Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions.
RESULTS
The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS.
CONCLUSIONS
These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry</description><identifier>ISSN: 0268-2575</identifier><identifier>EISSN: 1097-4660</identifier><identifier>DOI: 10.1002/jctb.6188</identifier><language>eng</language><publisher>Chichester, UK: John Wiley & Sons, Ltd</publisher><subject>B. stearothermophilus ; Bacillus stearothermophilus ; Biodegradation ; clopyralid ; Composite materials ; Deactivation ; Disinfection ; DNA damage ; Environmental degradation ; Exploitation ; Graphene ; graphene oxide ; Hybridization ; Inactivation ; Infrared spectroscopy ; Lysis ; Mineralization ; Organic chemistry ; Oxidation ; Pesticides ; Photocatalysis ; photocatalytic ; Photooxidation ; Pollutants ; Purification ; Recombination ; Scanning electron microscopy ; Spectrometry ; Spore coats ; TiO2 ; Titanium dioxide ; Water purification ; Water treatment</subject><ispartof>Journal of chemical technology and biotechnology (1986), 2019-12, Vol.94 (12), p.3905-3914</ispartof><rights>2019 Society of Chemical Industry</rights><rights>Copyright © 2019 Society of Chemical Industry</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0002-1260-3859</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktopdf>$$Uhttps://onlinelibrary.wiley.com/doi/pdf/10.1002%2Fjctb.6188$$EPDF$$P50$$Gwiley$$H</linktopdf><linktohtml>$$Uhttps://onlinelibrary.wiley.com/doi/full/10.1002%2Fjctb.6188$$EHTML$$P50$$Gwiley$$H</linktohtml><link.rule.ids>314,780,784,1417,27924,27925,45574,45575</link.rule.ids></links><search><creatorcontrib>Berberidou, Chrysanthi</creatorcontrib><creatorcontrib>Kyzas, George Z</creatorcontrib><creatorcontrib>Paspaltsis, Ioannis</creatorcontrib><creatorcontrib>Sklaviadis, Theodoros</creatorcontrib><creatorcontrib>Poulios, Ioannis</creatorcontrib><title>Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites</title><title>Journal of chemical technology and biotechnology (1986)</title><description>BACKGROUND
Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions.
RESULTS
The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS.
CONCLUSIONS
These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry</description><subject>B. stearothermophilus</subject><subject>Bacillus stearothermophilus</subject><subject>Biodegradation</subject><subject>clopyralid</subject><subject>Composite materials</subject><subject>Deactivation</subject><subject>Disinfection</subject><subject>DNA damage</subject><subject>Environmental degradation</subject><subject>Exploitation</subject><subject>Graphene</subject><subject>graphene oxide</subject><subject>Hybridization</subject><subject>Inactivation</subject><subject>Infrared spectroscopy</subject><subject>Lysis</subject><subject>Mineralization</subject><subject>Organic chemistry</subject><subject>Oxidation</subject><subject>Pesticides</subject><subject>Photocatalysis</subject><subject>photocatalytic</subject><subject>Photooxidation</subject><subject>Pollutants</subject><subject>Purification</subject><subject>Recombination</subject><subject>Scanning electron microscopy</subject><subject>Spectrometry</subject><subject>Spore coats</subject><subject>TiO2</subject><subject>Titanium dioxide</subject><subject>Water purification</subject><subject>Water treatment</subject><issn>0268-2575</issn><issn>1097-4660</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2019</creationdate><recordtype>article</recordtype><recordid>eNotkMtOwzAQRS0EEqWw4A8ssQ71I3GcJVQ8VaksytryY9y6SuOQOCr5exqVzcxodHSvdBC6p-SREsIWe5vMo6BSXqAZJVWZ5UKQSzQjTMiMFWVxjW76fk8IEZKJGfJfu5ii1UnXYwoWu9CHxoNNITZYNw63Qxd8OAHTI3p81Ak6DIe2jmNotrgDN1hweNvpdgcN4PgbHCw2Yc2wjYc29iFBf4uuvK57uPvfc_T9-rJZvmer9dvH8mmVbZkgMtNeMwOaOe2nKZ0tCst5XgojhCiNcZUvck0q7gwtKgKSO8ipg8LwimrD5-jhnNt28WeAPql9HLrmVKkYp4yxUgp-ohZn6hhqGFXbhYPuRkWJmhyqyaGaHKrP5eZ5OvgfqzhplA</recordid><startdate>201912</startdate><enddate>201912</enddate><creator>Berberidou, Chrysanthi</creator><creator>Kyzas, George Z</creator><creator>Paspaltsis, Ioannis</creator><creator>Sklaviadis, Theodoros</creator><creator>Poulios, Ioannis</creator><general>John Wiley & Sons, Ltd</general><general>Wiley Subscription Services, Inc</general><scope>7QF</scope><scope>7QO</scope><scope>7QQ</scope><scope>7QR</scope><scope>7SC</scope><scope>7SE</scope><scope>7SP</scope><scope>7SR</scope><scope>7T7</scope><scope>7TA</scope><scope>7TB</scope><scope>7U5</scope><scope>8BQ</scope><scope>8FD</scope><scope>C1K</scope><scope>F28</scope><scope>FR3</scope><scope>H8D</scope><scope>H8G</scope><scope>JG9</scope><scope>JQ2</scope><scope>KR7</scope><scope>L7M</scope><scope>L~C</scope><scope>L~D</scope><scope>P64</scope><orcidid>https://orcid.org/0000-0002-1260-3859</orcidid></search><sort><creationdate>201912</creationdate><title>Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites</title><author>Berberidou, Chrysanthi ; Kyzas, George Z ; Paspaltsis, Ioannis ; Sklaviadis, Theodoros ; Poulios, Ioannis</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-g2608-afa2bea2dafea2d8dc55c33476b6667bbd9f54a093db1590e83de41de5b391ab3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2019</creationdate><topic>B. stearothermophilus</topic><topic>Bacillus stearothermophilus</topic><topic>Biodegradation</topic><topic>clopyralid</topic><topic>Composite materials</topic><topic>Deactivation</topic><topic>Disinfection</topic><topic>DNA damage</topic><topic>Environmental degradation</topic><topic>Exploitation</topic><topic>Graphene</topic><topic>graphene oxide</topic><topic>Hybridization</topic><topic>Inactivation</topic><topic>Infrared spectroscopy</topic><topic>Lysis</topic><topic>Mineralization</topic><topic>Organic chemistry</topic><topic>Oxidation</topic><topic>Pesticides</topic><topic>Photocatalysis</topic><topic>photocatalytic</topic><topic>Photooxidation</topic><topic>Pollutants</topic><topic>Purification</topic><topic>Recombination</topic><topic>Scanning electron microscopy</topic><topic>Spectrometry</topic><topic>Spore coats</topic><topic>TiO2</topic><topic>Titanium dioxide</topic><topic>Water purification</topic><topic>Water treatment</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Berberidou, Chrysanthi</creatorcontrib><creatorcontrib>Kyzas, George Z</creatorcontrib><creatorcontrib>Paspaltsis, Ioannis</creatorcontrib><creatorcontrib>Sklaviadis, Theodoros</creatorcontrib><creatorcontrib>Poulios, Ioannis</creatorcontrib><collection>Aluminium Industry Abstracts</collection><collection>Biotechnology Research Abstracts</collection><collection>Ceramic Abstracts</collection><collection>Chemoreception Abstracts</collection><collection>Computer and Information Systems Abstracts</collection><collection>Corrosion Abstracts</collection><collection>Electronics & Communications Abstracts</collection><collection>Engineered Materials Abstracts</collection><collection>Industrial and Applied Microbiology Abstracts (Microbiology A)</collection><collection>Materials Business File</collection><collection>Mechanical & Transportation Engineering Abstracts</collection><collection>Solid State and Superconductivity Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>ANTE: Abstracts in New Technology & Engineering</collection><collection>Engineering Research Database</collection><collection>Aerospace Database</collection><collection>Copper Technical Reference Library</collection><collection>Materials Research Database</collection><collection>ProQuest Computer Science Collection</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Computer and Information Systems Abstracts Academic</collection><collection>Computer and Information Systems Abstracts Professional</collection><collection>Biotechnology and BioEngineering Abstracts</collection><jtitle>Journal of chemical technology and biotechnology (1986)</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Berberidou, Chrysanthi</au><au>Kyzas, George Z</au><au>Paspaltsis, Ioannis</au><au>Sklaviadis, Theodoros</au><au>Poulios, Ioannis</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites</atitle><jtitle>Journal of chemical technology and biotechnology (1986)</jtitle><date>2019-12</date><risdate>2019</risdate><volume>94</volume><issue>12</issue><spage>3905</spage><epage>3914</epage><pages>3905-3914</pages><issn>0268-2575</issn><eissn>1097-4660</eissn><abstract>BACKGROUND
Recombination of photogenerated carriers in titanium dioxide (TiO2)‐mediated semiconducting photocatalysis is considered to be the principal obstacle in its unlimited exploitation in practical applications. Hybridization of TiO2 with graphene‐based materials appears to be a highly promising alternative. In this context, reduced graphene oxide (rGO)/TiO2 composites were prepared using a simple ultrasonically assisted route under mild reaction conditions.
RESULTS
The as‐prepared composites were characterized by X‐ray diffraction (XRD), scanning electron microscopy (SEM), energy‐dispersive X‐ray spectrometry (EDS), Fourier‐transform infrared spectroscopy (FTIR) and nitrogen adsorption–desorption isotherms. Photocatalytic efficiencies of the as‐prepared composites were evaluated employing the pesticide clopyralid as a model pollutant. Initial degradation and mineralization rates obtained in the presence of the as‐prepared composites were, in all cases, higher than the one obtained in the presence of the bare TiO2, with 5% rGO/TiO2 achieving the highest r0 and rDOC values. The as‐prepared composites also were evaluated based on their potential to inactivate bacterial endospores of the Bacillus stearothermophilus species, well‐known for their extraordinary resistance to most inactivation processes. Prevalence of 5% rGO/TiO2 in the inactivation of B. stearothermophilus among all as‐prepared materials was evident, accomplished within 120 min of UV‐A illumination. Real‐time PCR experiments enabled the detection of genomic DNA released during photocatalytic oxidation, in the presence of 5% rGO/TiO2 and UV‐A, suggesting lysis of the outer and inner spore coat caused by the generated ROS.
CONCLUSIONS
These findings demonstrate the potential of rGO, a low‐cost, nontoxic material to serve as a reliable alternative in the enhancement of TiO2 photocatalytic efficiency in water processing applications. © 2019 Society of Chemical Industry</abstract><cop>Chichester, UK</cop><pub>John Wiley & Sons, Ltd</pub><doi>10.1002/jctb.6188</doi><tpages>10</tpages><orcidid>https://orcid.org/0000-0002-1260-3859</orcidid></addata></record> |
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| subjects | B. stearothermophilus Bacillus stearothermophilus Biodegradation clopyralid Composite materials Deactivation Disinfection DNA damage Environmental degradation Exploitation Graphene graphene oxide Hybridization Inactivation Infrared spectroscopy Lysis Mineralization Organic chemistry Oxidation Pesticides Photocatalysis photocatalytic Photooxidation Pollutants Purification Recombination Scanning electron microscopy Spectrometry Spore coats TiO2 Titanium dioxide Water purification Water treatment |
| title | Photocatalytic disinfection and purification of water employing reduced graphene oxide/TiO2 composites |
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