Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light
The degradation mechanism of p-nitrophenol (p-NP) exposed to 254 nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce...
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| Veröffentlicht in: | Journal of hazardous materials 2010-08, Vol.180 (1), p.86-90 |
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| container_title | Journal of hazardous materials |
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| creator | Zhao, Sufang Ma, Hongjuan Wang, Min Cao, Changqing Xiong, Jie Xu, Yunshu Yao, Side |
| description | The degradation mechanism of p-nitrophenol (p-NP) exposed to 254
nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce its radical cation (p-NP
+
) and hydrated electron (e
aq
−) with a quantum yield of 0.52. In neutral solution p-NP
+
will be quickly deprotonated to form its phenoxyl radical (p-NP
) which will react with oxygen to promote the breakage of benzene ring of p-NP. The degradation efficiency of p-NP exposed to 254
nm UV is as low as commonly reported. However, oxygen could improve the photo-degradation efficiency, which is due to the reaction of oxygen with p-NP
. The reaction between oxygen and p-NP
has been experimentally confirmed both in LFP and in pulse radiolysis. |
| doi_str_mv | 10.1016/j.jhazmat.2010.03.076 |
| format | Article |
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nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce its radical cation (p-NP
+
) and hydrated electron (e
aq
−) with a quantum yield of 0.52. In neutral solution p-NP
+
will be quickly deprotonated to form its phenoxyl radical (p-NP
) which will react with oxygen to promote the breakage of benzene ring of p-NP. The degradation efficiency of p-NP exposed to 254
nm UV is as low as commonly reported. However, oxygen could improve the photo-degradation efficiency, which is due to the reaction of oxygen with p-NP
. The reaction between oxygen and p-NP
has been experimentally confirmed both in LFP and in pulse radiolysis.</description><identifier>ISSN: 0304-3894</identifier><identifier>EISSN: 1873-3336</identifier><identifier>DOI: 10.1016/j.jhazmat.2010.03.076</identifier><identifier>PMID: 20435418</identifier><identifier>CODEN: JHMAD9</identifier><language>eng</language><publisher>Kidlington: Elsevier B.V</publisher><subject>Applied sciences ; Chemical engineering ; Exact sciences and technology ; Laser flash photolysis ; Nitrophenols - chemistry ; p-Nitrophenol ; Phenoxyl radical ; Photo-degradation ; Photochemistry ; Pollution ; Reactors ; Spectrophotometry, Ultraviolet ; Ultraviolet Rays</subject><ispartof>Journal of hazardous materials, 2010-08, Vol.180 (1), p.86-90</ispartof><rights>2010</rights><rights>2015 INIST-CNRS</rights><rights>Crown Copyright 2010. Published by Elsevier B.V. All rights reserved.</rights><lds50>peer_reviewed</lds50><woscitedreferencessubscribed>false</woscitedreferencessubscribed></display><links><openurl>$$Topenurl_article</openurl><openurlfulltext>$$Topenurlfull_article</openurlfulltext><thumbnail>$$Tsyndetics_thumb_exl</thumbnail><linktohtml>$$Uhttps://www.sciencedirect.com/science/article/pii/S0304389410003821$$EHTML$$P50$$Gelsevier$$H</linktohtml><link.rule.ids>314,776,780,3536,27903,27904,65309</link.rule.ids><backlink>$$Uhttp://pascal-francis.inist.fr/vibad/index.php?action=getRecordDetail&idt=22913191$$DView record in Pascal Francis$$Hfree_for_read</backlink><backlink>$$Uhttps://www.ncbi.nlm.nih.gov/pubmed/20435418$$D View this record in MEDLINE/PubMed$$Hfree_for_read</backlink></links><search><creatorcontrib>Zhao, Sufang</creatorcontrib><creatorcontrib>Ma, Hongjuan</creatorcontrib><creatorcontrib>Wang, Min</creatorcontrib><creatorcontrib>Cao, Changqing</creatorcontrib><creatorcontrib>Xiong, Jie</creatorcontrib><creatorcontrib>Xu, Yunshu</creatorcontrib><creatorcontrib>Yao, Side</creatorcontrib><title>Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light</title><title>Journal of hazardous materials</title><addtitle>J Hazard Mater</addtitle><description>The degradation mechanism of p-nitrophenol (p-NP) exposed to 254
nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce its radical cation (p-NP
+
) and hydrated electron (e
aq
−) with a quantum yield of 0.52. In neutral solution p-NP
+
will be quickly deprotonated to form its phenoxyl radical (p-NP
) which will react with oxygen to promote the breakage of benzene ring of p-NP. The degradation efficiency of p-NP exposed to 254
nm UV is as low as commonly reported. However, oxygen could improve the photo-degradation efficiency, which is due to the reaction of oxygen with p-NP
. The reaction between oxygen and p-NP
has been experimentally confirmed both in LFP and in pulse radiolysis.</description><subject>Applied sciences</subject><subject>Chemical engineering</subject><subject>Exact sciences and technology</subject><subject>Laser flash photolysis</subject><subject>Nitrophenols - chemistry</subject><subject>p-Nitrophenol</subject><subject>Phenoxyl radical</subject><subject>Photo-degradation</subject><subject>Photochemistry</subject><subject>Pollution</subject><subject>Reactors</subject><subject>Spectrophotometry, Ultraviolet</subject><subject>Ultraviolet Rays</subject><issn>0304-3894</issn><issn>1873-3336</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2010</creationdate><recordtype>article</recordtype><sourceid>EIF</sourceid><recordid>eNpFkcGKFDEQhoMo7uzoIyi5iKceK6medPoksqyusOBBV48hnVS2M3R32k5GXJ_eHnbEQ1Hw8_FD1cfYKwE7AUK9O-wOvf0z2rKTsGaAO2jUE7YRusEKEdVTtgGEukLd1hfsMucDAIhmXz9nFxJq3NdCb9iPr-XoH3iaeOmJj-R6O8U88hT43KeSKk_3i_W2xBU5hdUUy5LmnqY0cPo9p0yel8TlvubTyO--8yHe9-UFexbskOnleW_Z3cfrb1c31e2XT5-vPtxWJKUqlRO1VKG12oW20aKj0CorVdN02NqAoJ1UNngfdIs1eKeF6wS0QpFGF0SHW_b2sXde0s8j5WLGmB0Ng50oHbNpEIVs9oAr-fpMHruRvJmXONrlwfz7xQq8OQM2OzuExU4u5v-cbAWKdbbs_SNH612_Ii0mu0iTIx8XcsX4FI0Ac7JkDuZsyZwsGUCzWsK_Yt6FKw</recordid><startdate>20100815</startdate><enddate>20100815</enddate><creator>Zhao, Sufang</creator><creator>Ma, Hongjuan</creator><creator>Wang, Min</creator><creator>Cao, Changqing</creator><creator>Xiong, Jie</creator><creator>Xu, Yunshu</creator><creator>Yao, Side</creator><general>Elsevier B.V</general><general>Elsevier</general><scope>IQODW</scope><scope>CGR</scope><scope>CUY</scope><scope>CVF</scope><scope>ECM</scope><scope>EIF</scope><scope>NPM</scope><scope>7X8</scope></search><sort><creationdate>20100815</creationdate><title>Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light</title><author>Zhao, Sufang ; Ma, Hongjuan ; Wang, Min ; Cao, Changqing ; Xiong, Jie ; Xu, Yunshu ; Yao, Side</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-e226t-c1426f9a8cf9781bef96a2677b39af308c26afddf89340dc81cb10916e83cf1b3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2010</creationdate><topic>Applied sciences</topic><topic>Chemical engineering</topic><topic>Exact sciences and technology</topic><topic>Laser flash photolysis</topic><topic>Nitrophenols - chemistry</topic><topic>p-Nitrophenol</topic><topic>Phenoxyl radical</topic><topic>Photo-degradation</topic><topic>Photochemistry</topic><topic>Pollution</topic><topic>Reactors</topic><topic>Spectrophotometry, Ultraviolet</topic><topic>Ultraviolet Rays</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Zhao, Sufang</creatorcontrib><creatorcontrib>Ma, Hongjuan</creatorcontrib><creatorcontrib>Wang, Min</creatorcontrib><creatorcontrib>Cao, Changqing</creatorcontrib><creatorcontrib>Xiong, Jie</creatorcontrib><creatorcontrib>Xu, Yunshu</creatorcontrib><creatorcontrib>Yao, Side</creatorcontrib><collection>Pascal-Francis</collection><collection>Medline</collection><collection>MEDLINE</collection><collection>MEDLINE (Ovid)</collection><collection>MEDLINE</collection><collection>MEDLINE</collection><collection>PubMed</collection><collection>MEDLINE - Academic</collection><jtitle>Journal of hazardous materials</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Zhao, Sufang</au><au>Ma, Hongjuan</au><au>Wang, Min</au><au>Cao, Changqing</au><au>Xiong, Jie</au><au>Xu, Yunshu</au><au>Yao, Side</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light</atitle><jtitle>Journal of hazardous materials</jtitle><addtitle>J Hazard Mater</addtitle><date>2010-08-15</date><risdate>2010</risdate><volume>180</volume><issue>1</issue><spage>86</spage><epage>90</epage><pages>86-90</pages><issn>0304-3894</issn><eissn>1873-3336</eissn><coden>JHMAD9</coden><abstract>The degradation mechanism of p-nitrophenol (p-NP) exposed to 254
nm UV light was studied in the presence and the absence of oxygen respectively via both steady-state photolysis and time-resolved laser flash photolysis (LFP) experiments. It has been confirmed that p-NP can be photo-ionized to produce its radical cation (p-NP
+
) and hydrated electron (e
aq
−) with a quantum yield of 0.52. In neutral solution p-NP
+
will be quickly deprotonated to form its phenoxyl radical (p-NP
) which will react with oxygen to promote the breakage of benzene ring of p-NP. The degradation efficiency of p-NP exposed to 254
nm UV is as low as commonly reported. However, oxygen could improve the photo-degradation efficiency, which is due to the reaction of oxygen with p-NP
. The reaction between oxygen and p-NP
has been experimentally confirmed both in LFP and in pulse radiolysis.</abstract><cop>Kidlington</cop><pub>Elsevier B.V</pub><pmid>20435418</pmid><doi>10.1016/j.jhazmat.2010.03.076</doi><tpages>5</tpages></addata></record> |
| fulltext | fulltext |
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| ispartof | Journal of hazardous materials, 2010-08, Vol.180 (1), p.86-90 |
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| language | eng |
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| source | MEDLINE; Elsevier ScienceDirect Journals |
| subjects | Applied sciences Chemical engineering Exact sciences and technology Laser flash photolysis Nitrophenols - chemistry p-Nitrophenol Phenoxyl radical Photo-degradation Photochemistry Pollution Reactors Spectrophotometry, Ultraviolet Ultraviolet Rays |
| title | Study on the mechanism of photo-degradation of p-nitrophenol exposed to 254 nm UV light |
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