Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposite with enhanced photocatalytic performance under visible-light irradiation via multi-step charge transfer process
The excellent visible light photocatalytic activity and stability of g-C3N4/TiO2/CNT ternary nanocomposite photocatalysts was mainly attributed to the multistep transfer of electrons by heterojunction formation at g-C3N4/TiO2 interface and CNT. [Display omitted] •Noble metal-free g-C3N4/TiO2/CNT ter...
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| description | The excellent visible light photocatalytic activity and stability of g-C3N4/TiO2/CNT ternary nanocomposite photocatalysts was mainly attributed to the multistep transfer of electrons by heterojunction formation at g-C3N4/TiO2 interface and CNT.
[Display omitted]
•Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposites were prepared by a facile hydrothermal method.•Ternary nanocomposite showed enhanced visible-light absorption.•Heterojunction formation and synergistic effect of CNT account for the enhanced photocatalytic performance.•The electrons and OH are the main photoactive species responsible for the decolouration of MB.•The g-C3N4/TiO2/CNT ternary nanocomposite exhibited excellent photo stability.
A noble metal-free photocatalyst, consisting of graphitic carbon nitride (g-C3N4), TiO2 and carbon nanotubes (CNT) was synthesized by a facile hydrothermal method and its application for the photocatalytic decolouration of methylene blue (MB) dye under visible light irradiation has been demonstrated. The microstructure, morphology, structural and optical properties of the synthesized nanocomposites was systematically studied using TEM, SEM, XRD, RAMAN, FTIR and UV–Vis DRS techniques. The g-C3N4/TiO2/CNT ternary nanocomposite exhibits five times higher photocatalytic activity compared to bare g-C3N4 under visible light irradiation. Enhanced photocatalytic performance of the ternary nanocomposite has been attributed to the synergistic effects of three components: Multistep charge transfer between heterojunction formation at g-C3N4/TiO2 interface and CNT, enhanced visible-light absorption and effective charge separation. A possible reaction mechanism has been proposed and scavenger experiment has been carried out to find the role of active radical species responsible for the dye decolouration. Additionally, the g-C3N4/TiO2/CNT photocatalyst retained excellent stability even after several cycles. This study offers a promising way of developing a highly efficient, noble metal-free, stable and visible-light-driven photocatalyst to promote the utilization of solar energy for environmental purification. |
| doi_str_mv | 10.1016/j.solener.2017.09.012 |
| format | Article |
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[Display omitted]
•Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposites were prepared by a facile hydrothermal method.•Ternary nanocomposite showed enhanced visible-light absorption.•Heterojunction formation and synergistic effect of CNT account for the enhanced photocatalytic performance.•The electrons and OH are the main photoactive species responsible for the decolouration of MB.•The g-C3N4/TiO2/CNT ternary nanocomposite exhibited excellent photo stability.
A noble metal-free photocatalyst, consisting of graphitic carbon nitride (g-C3N4), TiO2 and carbon nanotubes (CNT) was synthesized by a facile hydrothermal method and its application for the photocatalytic decolouration of methylene blue (MB) dye under visible light irradiation has been demonstrated. The microstructure, morphology, structural and optical properties of the synthesized nanocomposites was systematically studied using TEM, SEM, XRD, RAMAN, FTIR and UV–Vis DRS techniques. The g-C3N4/TiO2/CNT ternary nanocomposite exhibits five times higher photocatalytic activity compared to bare g-C3N4 under visible light irradiation. Enhanced photocatalytic performance of the ternary nanocomposite has been attributed to the synergistic effects of three components: Multistep charge transfer between heterojunction formation at g-C3N4/TiO2 interface and CNT, enhanced visible-light absorption and effective charge separation. A possible reaction mechanism has been proposed and scavenger experiment has been carried out to find the role of active radical species responsible for the dye decolouration. Additionally, the g-C3N4/TiO2/CNT photocatalyst retained excellent stability even after several cycles. This study offers a promising way of developing a highly efficient, noble metal-free, stable and visible-light-driven photocatalyst to promote the utilization of solar energy for environmental purification.</description><identifier>ISSN: 0038-092X</identifier><identifier>EISSN: 1471-1257</identifier><identifier>DOI: 10.1016/j.solener.2017.09.012</identifier><language>eng</language><publisher>New York: Elsevier Ltd</publisher><subject>Carbon nanotubes ; Carbon nitride ; Catalytic activity ; Charge transfer ; CNT ; Decoloring ; Decolorization ; Dyes ; Electromagnetic absorption ; Energy consumption ; g-C3N4 ; Graphite ; Heterojunction ; Heterojunctions ; Irradiation ; Light irradiation ; Methylene blue ; Microstructure ; Nanocomposites ; Noble metals ; Optical properties ; Photocatalysis ; Photocatalysts ; Purification ; Reaction mechanisms ; Solar energy ; Synergistic effect ; Synthesis ; Titanium dioxide</subject><ispartof>Solar energy, 2017-12, Vol.158, p.132-139</ispartof><rights>2017 Elsevier Ltd</rights><rights>Copyright Pergamon Press Inc. Dec 2017</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed><orcidid>0000-0002-5725-8067</orcidid></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://dx.doi.org/10.1016/j.solener.2017.09.012$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,780,784,3550,27924,27925,45995</link.rule.ids></links><search><creatorcontrib>Chaudhary, Deepti</creatorcontrib><creatorcontrib>Vankar, V.D.</creatorcontrib><creatorcontrib>Khare, Neeraj</creatorcontrib><title>Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposite with enhanced photocatalytic performance under visible-light irradiation via multi-step charge transfer process</title><title>Solar energy</title><description>The excellent visible light photocatalytic activity and stability of g-C3N4/TiO2/CNT ternary nanocomposite photocatalysts was mainly attributed to the multistep transfer of electrons by heterojunction formation at g-C3N4/TiO2 interface and CNT.
[Display omitted]
•Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposites were prepared by a facile hydrothermal method.•Ternary nanocomposite showed enhanced visible-light absorption.•Heterojunction formation and synergistic effect of CNT account for the enhanced photocatalytic performance.•The electrons and OH are the main photoactive species responsible for the decolouration of MB.•The g-C3N4/TiO2/CNT ternary nanocomposite exhibited excellent photo stability.
A noble metal-free photocatalyst, consisting of graphitic carbon nitride (g-C3N4), TiO2 and carbon nanotubes (CNT) was synthesized by a facile hydrothermal method and its application for the photocatalytic decolouration of methylene blue (MB) dye under visible light irradiation has been demonstrated. The microstructure, morphology, structural and optical properties of the synthesized nanocomposites was systematically studied using TEM, SEM, XRD, RAMAN, FTIR and UV–Vis DRS techniques. The g-C3N4/TiO2/CNT ternary nanocomposite exhibits five times higher photocatalytic activity compared to bare g-C3N4 under visible light irradiation. Enhanced photocatalytic performance of the ternary nanocomposite has been attributed to the synergistic effects of three components: Multistep charge transfer between heterojunction formation at g-C3N4/TiO2 interface and CNT, enhanced visible-light absorption and effective charge separation. A possible reaction mechanism has been proposed and scavenger experiment has been carried out to find the role of active radical species responsible for the dye decolouration. Additionally, the g-C3N4/TiO2/CNT photocatalyst retained excellent stability even after several cycles. This study offers a promising way of developing a highly efficient, noble metal-free, stable and visible-light-driven photocatalyst to promote the utilization of solar energy for environmental purification.</description><subject>Carbon nanotubes</subject><subject>Carbon nitride</subject><subject>Catalytic activity</subject><subject>Charge transfer</subject><subject>CNT</subject><subject>Decoloring</subject><subject>Decolorization</subject><subject>Dyes</subject><subject>Electromagnetic absorption</subject><subject>Energy consumption</subject><subject>g-C3N4</subject><subject>Graphite</subject><subject>Heterojunction</subject><subject>Heterojunctions</subject><subject>Irradiation</subject><subject>Light irradiation</subject><subject>Methylene blue</subject><subject>Microstructure</subject><subject>Nanocomposites</subject><subject>Noble metals</subject><subject>Optical properties</subject><subject>Photocatalysis</subject><subject>Photocatalysts</subject><subject>Purification</subject><subject>Reaction mechanisms</subject><subject>Solar energy</subject><subject>Synergistic effect</subject><subject>Synthesis</subject><subject>Titanium dioxide</subject><issn>0038-092X</issn><issn>1471-1257</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2017</creationdate><recordtype>article</recordtype><recordid>eNotUdtKAzEQDaJgvXyCEPA521zWvTyJFG8g7UsF30KanXRTtsmapIo_5HeapT4NzJxzZuYchG4YLRhl1XxXRD-Ag1BwyuqCtgVl_ATNWFkzwvhdfYpmlIqG0JZ_nKOLGHc0A1lTz9Dv0m8GwHtIaiAmAOAtWYhlOV_bFZ8vlmucIDgVfrBTzmu_H320CfC3TT0G1yunocNj75PXKmv8JKvxCMH4sJ9m-OA6CPjLRpv3kMFu-4RtCKqzKlnv8kTh_WFIlsQEI9a9ClvAKSgXTSaOwWuI8QqdGTVEuP6vl-j96XG9eCFvq-fXxcMbAV5XiTBlmOJgqGhLJXTZbSpeceCq07nHawG04g3ntYG2onfGVEIYMREYlNkicYluj7p57-cBYpI7f8j_D1GytmkYbUQ1oe6PKMinfFkIMmoLkxM2gE6y81YyKqdw5E7-hyOncCRtZQ5H_AE4EIlp</recordid><startdate>20171201</startdate><enddate>20171201</enddate><creator>Chaudhary, Deepti</creator><creator>Vankar, V.D.</creator><creator>Khare, Neeraj</creator><general>Elsevier Ltd</general><general>Pergamon Press Inc</general><scope>7SP</scope><scope>7ST</scope><scope>8FD</scope><scope>C1K</scope><scope>FR3</scope><scope>KR7</scope><scope>L7M</scope><scope>SOI</scope><orcidid>https://orcid.org/0000-0002-5725-8067</orcidid></search><sort><creationdate>20171201</creationdate><title>Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposite with enhanced photocatalytic performance under visible-light irradiation via multi-step charge transfer process</title><author>Chaudhary, Deepti ; Vankar, V.D. ; Khare, Neeraj</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e276t-1af1a2ef0394a3c4db6262e2adcf03273e0628227fe9605ff633f32ef01e40033</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2017</creationdate><topic>Carbon nanotubes</topic><topic>Carbon nitride</topic><topic>Catalytic activity</topic><topic>Charge transfer</topic><topic>CNT</topic><topic>Decoloring</topic><topic>Decolorization</topic><topic>Dyes</topic><topic>Electromagnetic absorption</topic><topic>Energy consumption</topic><topic>g-C3N4</topic><topic>Graphite</topic><topic>Heterojunction</topic><topic>Heterojunctions</topic><topic>Irradiation</topic><topic>Light irradiation</topic><topic>Methylene blue</topic><topic>Microstructure</topic><topic>Nanocomposites</topic><topic>Noble metals</topic><topic>Optical properties</topic><topic>Photocatalysis</topic><topic>Photocatalysts</topic><topic>Purification</topic><topic>Reaction mechanisms</topic><topic>Solar energy</topic><topic>Synergistic effect</topic><topic>Synthesis</topic><topic>Titanium dioxide</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Chaudhary, Deepti</creatorcontrib><creatorcontrib>Vankar, V.D.</creatorcontrib><creatorcontrib>Khare, Neeraj</creatorcontrib><collection>Electronics & Communications Abstracts</collection><collection>Environment Abstracts</collection><collection>Technology Research Database</collection><collection>Environmental Sciences and Pollution Management</collection><collection>Engineering Research Database</collection><collection>Civil Engineering Abstracts</collection><collection>Advanced Technologies Database with Aerospace</collection><collection>Environment Abstracts</collection><jtitle>Solar energy</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Chaudhary, Deepti</au><au>Vankar, V.D.</au><au>Khare, Neeraj</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposite with enhanced photocatalytic performance under visible-light irradiation via multi-step charge transfer process</atitle><jtitle>Solar energy</jtitle><date>2017-12-01</date><risdate>2017</risdate><volume>158</volume><spage>132</spage><epage>139</epage><pages>132-139</pages><issn>0038-092X</issn><eissn>1471-1257</eissn><abstract>The excellent visible light photocatalytic activity and stability of g-C3N4/TiO2/CNT ternary nanocomposite photocatalysts was mainly attributed to the multistep transfer of electrons by heterojunction formation at g-C3N4/TiO2 interface and CNT.
[Display omitted]
•Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposites were prepared by a facile hydrothermal method.•Ternary nanocomposite showed enhanced visible-light absorption.•Heterojunction formation and synergistic effect of CNT account for the enhanced photocatalytic performance.•The electrons and OH are the main photoactive species responsible for the decolouration of MB.•The g-C3N4/TiO2/CNT ternary nanocomposite exhibited excellent photo stability.
A noble metal-free photocatalyst, consisting of graphitic carbon nitride (g-C3N4), TiO2 and carbon nanotubes (CNT) was synthesized by a facile hydrothermal method and its application for the photocatalytic decolouration of methylene blue (MB) dye under visible light irradiation has been demonstrated. The microstructure, morphology, structural and optical properties of the synthesized nanocomposites was systematically studied using TEM, SEM, XRD, RAMAN, FTIR and UV–Vis DRS techniques. The g-C3N4/TiO2/CNT ternary nanocomposite exhibits five times higher photocatalytic activity compared to bare g-C3N4 under visible light irradiation. Enhanced photocatalytic performance of the ternary nanocomposite has been attributed to the synergistic effects of three components: Multistep charge transfer between heterojunction formation at g-C3N4/TiO2 interface and CNT, enhanced visible-light absorption and effective charge separation. A possible reaction mechanism has been proposed and scavenger experiment has been carried out to find the role of active radical species responsible for the dye decolouration. Additionally, the g-C3N4/TiO2/CNT photocatalyst retained excellent stability even after several cycles. This study offers a promising way of developing a highly efficient, noble metal-free, stable and visible-light-driven photocatalyst to promote the utilization of solar energy for environmental purification.</abstract><cop>New York</cop><pub>Elsevier Ltd</pub><doi>10.1016/j.solener.2017.09.012</doi><tpages>8</tpages><orcidid>https://orcid.org/0000-0002-5725-8067</orcidid></addata></record> |
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| subjects | Carbon nanotubes Carbon nitride Catalytic activity Charge transfer CNT Decoloring Decolorization Dyes Electromagnetic absorption Energy consumption g-C3N4 Graphite Heterojunction Heterojunctions Irradiation Light irradiation Methylene blue Microstructure Nanocomposites Noble metals Optical properties Photocatalysis Photocatalysts Purification Reaction mechanisms Solar energy Synergistic effect Synthesis Titanium dioxide |
| title | Noble metal-free g-C3N4/TiO2/CNT ternary nanocomposite with enhanced photocatalytic performance under visible-light irradiation via multi-step charge transfer process |
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