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Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr(VI) under direct sunlight

[Display omitted] •Fibrous red phosphorus (FRP) was synthesized by solid state method.•Bandgap of FRP ~1.9 eV makes it suitable photocatalyst even in natural sunlight.•FRP was explored as non-metallic photocatalyst for reduction of toxic Cr(VI).•High rate of Cr(VI) reduction was observed in acidic m...

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Published in:Materials letters 2021-01, Vol.283, p.128750, Article 128750
Main Authors: Athira, T.K., Roshith, M., Satheesh Babu, T.G., Ravi Kumar, Darbha V.
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creator Athira, T.K.
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description [Display omitted] •Fibrous red phosphorus (FRP) was synthesized by solid state method.•Bandgap of FRP ~1.9 eV makes it suitable photocatalyst even in natural sunlight.•FRP was explored as non-metallic photocatalyst for reduction of toxic Cr(VI).•High rate of Cr(VI) reduction was observed in acidic medium.•Complete reduction of Cr(VI) (25 mg/L, 100 mL) was observed within 40 min at pH-2. Hexavalent chromium is an important inorganic industrial effluent in the water that causes serious health problems to the mankind. Photocatalytic reduction of Cr(VI) is a green technology that converts the toxic Cr(VI) to non-toxic Cr(III). In the photocatalytic reduction of Cr(VI), transition metal oxide semiconductors are mainly used as photocatalysts. This infers, for the removal of a transition metal i.e. Cr(VI), another transition metal is added in the form of photocatalyst. Hence, we explore a non-metallic, elemental photocatalyst fibrous red phosphorus (FRP), a crystalline allotrope of red phosphorus as photocatalyst for Cr(VI) reduction. FRP exhibits excellent photocatalytic activity towards Cr(VI) reduction under direct sunlight and we observed complete reduction of Cr(VI) (25 mg/L) within 40 min at pH-2.
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Hexavalent chromium is an important inorganic industrial effluent in the water that causes serious health problems to the mankind. Photocatalytic reduction of Cr(VI) is a green technology that converts the toxic Cr(VI) to non-toxic Cr(III). In the photocatalytic reduction of Cr(VI), transition metal oxide semiconductors are mainly used as photocatalysts. This infers, for the removal of a transition metal i.e. Cr(VI), another transition metal is added in the form of photocatalyst. Hence, we explore a non-metallic, elemental photocatalyst fibrous red phosphorus (FRP), a crystalline allotrope of red phosphorus as photocatalyst for Cr(VI) reduction. 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Hexavalent chromium is an important inorganic industrial effluent in the water that causes serious health problems to the mankind. Photocatalytic reduction of Cr(VI) is a green technology that converts the toxic Cr(VI) to non-toxic Cr(III). In the photocatalytic reduction of Cr(VI), transition metal oxide semiconductors are mainly used as photocatalysts. This infers, for the removal of a transition metal i.e. Cr(VI), another transition metal is added in the form of photocatalyst. Hence, we explore a non-metallic, elemental photocatalyst fibrous red phosphorus (FRP), a crystalline allotrope of red phosphorus as photocatalyst for Cr(VI) reduction. FRP exhibits excellent photocatalytic activity towards Cr(VI) reduction under direct sunlight and we observed complete reduction of Cr(VI) (25 mg/L) within 40 min at pH-2.</description><subject>Allotropy</subject><subject>Catalytic activity</subject><subject>Chromium</subject><subject>Cr(VI) reduction</subject><subject>Fibrous red phosphorus</subject><subject>Hexavalent chromium</subject><subject>Industrial effluents</subject><subject>Materials science</subject><subject>Metal oxide semiconductors</subject><subject>Oxidation</subject><subject>Phosphorus</subject><subject>Photocatalysis</subject><subject>Photocatalysts</subject><subject>Solid state synthesis</subject><subject>Sunlight</subject><subject>Transition metal oxides</subject><issn>0167-577X</issn><issn>1873-4979</issn><fulltext>true</fulltext><rsrctype>article</rsrctype><creationdate>2021</creationdate><recordtype>article</recordtype><recordid>eNp9UE1r3DAQFSWFbtL-gx4EvSQHb2V9WPIlEJYkXVjIJQm9CVkad7V4ra0kL-y_j4x7LswwX2_eMA-h7zVZ16Rufh7WR5MHyGtKaGlRJQX5hFa1kqzirWyv0KrAZCWk_P0FXad0IITwlvAVik--i2FKOILDp31IxWMpTTE8hrE6QjbD4O08zMGaUl1Sxn2IOO8BQ9-Dzf4MM8FUsjDi0ONNvH3f3uFpdBCx87FgcJrGwf_Z56_oc2-GBN_-xRv09vT4uvlV7V6et5uHXWUZ47kSjaCqqTvXslZ1jLXOyM4SJVpJW96RhgsnnJUgaN3VVijFFHesA26AdMKwG_Rj4T3F8HeClPUhTHEsJzXlUilKGyoKii8oG0NKEXp9iv5o4kXXRM_q6oNe1NWzunpRt6zdL2tQPjh7iDpZD6OF5Vntgv8_wQeYy4Wx</recordid><startdate>20210115</startdate><enddate>20210115</enddate><creator>Athira, T.K.</creator><creator>Roshith, M.</creator><creator>Satheesh Babu, T.G.</creator><creator>Ravi Kumar, Darbha V.</creator><general>Elsevier B.V</general><general>Elsevier BV</general><scope>AAYXX</scope><scope>CITATION</scope><scope>7SR</scope><scope>8BQ</scope><scope>8FD</scope><scope>JG9</scope></search><sort><creationdate>20210115</creationdate><title>Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr(VI) under direct sunlight</title><author>Athira, T.K. ; Roshith, M. ; Satheesh Babu, T.G. ; Ravi Kumar, Darbha V.</author></sort><facets><frbrtype>5</frbrtype><frbrgroupid>cdi_FETCH-LOGICAL-c334t-5652861bd9398b339da7bc08597294b0645d5dc7e521b1c588384d3be4ae0b5a3</frbrgroupid><rsrctype>articles</rsrctype><prefilter>articles</prefilter><language>eng</language><creationdate>2021</creationdate><topic>Allotropy</topic><topic>Catalytic activity</topic><topic>Chromium</topic><topic>Cr(VI) reduction</topic><topic>Fibrous red phosphorus</topic><topic>Hexavalent chromium</topic><topic>Industrial effluents</topic><topic>Materials science</topic><topic>Metal oxide semiconductors</topic><topic>Oxidation</topic><topic>Phosphorus</topic><topic>Photocatalysis</topic><topic>Photocatalysts</topic><topic>Solid state synthesis</topic><topic>Sunlight</topic><topic>Transition metal oxides</topic><toplevel>peer_reviewed</toplevel><toplevel>online_resources</toplevel><creatorcontrib>Athira, T.K.</creatorcontrib><creatorcontrib>Roshith, M.</creatorcontrib><creatorcontrib>Satheesh Babu, T.G.</creatorcontrib><creatorcontrib>Ravi Kumar, Darbha V.</creatorcontrib><collection>CrossRef</collection><collection>Engineered Materials Abstracts</collection><collection>METADEX</collection><collection>Technology Research Database</collection><collection>Materials Research Database</collection><jtitle>Materials letters</jtitle></facets><delivery><delcategory>Remote Search Resource</delcategory><fulltext>fulltext</fulltext></delivery><addata><au>Athira, T.K.</au><au>Roshith, M.</au><au>Satheesh Babu, T.G.</au><au>Ravi Kumar, Darbha V.</au><format>journal</format><genre>article</genre><ristype>JOUR</ristype><atitle>Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr(VI) under direct sunlight</atitle><jtitle>Materials letters</jtitle><date>2021-01-15</date><risdate>2021</risdate><volume>283</volume><spage>128750</spage><pages>128750-</pages><artnum>128750</artnum><issn>0167-577X</issn><eissn>1873-4979</eissn><abstract>[Display omitted] •Fibrous red phosphorus (FRP) was synthesized by solid state method.•Bandgap of FRP ~1.9 eV makes it suitable photocatalyst even in natural sunlight.•FRP was explored as non-metallic photocatalyst for reduction of toxic Cr(VI).•High rate of Cr(VI) reduction was observed in acidic medium.•Complete reduction of Cr(VI) (25 mg/L, 100 mL) was observed within 40 min at pH-2. Hexavalent chromium is an important inorganic industrial effluent in the water that causes serious health problems to the mankind. Photocatalytic reduction of Cr(VI) is a green technology that converts the toxic Cr(VI) to non-toxic Cr(III). In the photocatalytic reduction of Cr(VI), transition metal oxide semiconductors are mainly used as photocatalysts. This infers, for the removal of a transition metal i.e. Cr(VI), another transition metal is added in the form of photocatalyst. Hence, we explore a non-metallic, elemental photocatalyst fibrous red phosphorus (FRP), a crystalline allotrope of red phosphorus as photocatalyst for Cr(VI) reduction. FRP exhibits excellent photocatalytic activity towards Cr(VI) reduction under direct sunlight and we observed complete reduction of Cr(VI) (25 mg/L) within 40 min at pH-2.</abstract><cop>Amsterdam</cop><pub>Elsevier B.V</pub><doi>10.1016/j.matlet.2020.128750</doi></addata></record>
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subjects Allotropy
Catalytic activity
Chromium
Cr(VI) reduction
Fibrous red phosphorus
Hexavalent chromium
Industrial effluents
Materials science
Metal oxide semiconductors
Oxidation
Phosphorus
Photocatalysis
Photocatalysts
Solid state synthesis
Sunlight
Transition metal oxides
title Fibrous red phosphorus as a non-metallic photocatalyst for the effective reduction of Cr(VI) under direct sunlight
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