Recyclable photocatalyst composites based on Ag 3 VO 4 and Ag 2 WO 4 @MOF@cotton for effective discoloration of dye in v
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ORIGINAL RESEARCH
Recyclable photocatalyst composites based on Ag3VO4 and Ag2WO4 @MOF@cotton for effective discoloration of dye in visible light Hossam E. Emam . Hanan B. Ahmed . Eslam Gomaa . Maher H. Helal . Reda M. Abdelhameed
Received: 6 April 2020 / Accepted: 3 June 2020 Ó Springer Nature B.V. 2020
Abstract Photocatalysts are highly applicable in treatment of the water pollution. However, most of the applied photocatalysts suffer from the inapplicability and non-recyclability which limited their application. Herein, applicable and recyclable effective photocatalyst composites of Ag2WO4@MIL-125-NH2@cotton and Ag3VO4@MIL-125-NH2@cotton successfully prepared by direct synthesis of MIL-125-NH2 and Ag2WO4 or Ag3VO4 within the cotton fabric as supported template, sequentially. Agglomerated rock
Electronic supplementary material The online version of this article (https://doi.org/10.1007/s10570-020-03282-8) contains supplementary material, which is available to authorized users. H. E. Emam (&) Textile Industries Research Division, Department of Pretreatment and Finishing of Cellulosic Based Textiles, National Research Centre, Scopus affiliation ID 60014618, 33 EL Buhouth St., Dokki 12622, Giza, Egypt e-mail: [email protected] H. B. Ahmed (&) E. Gomaa M. H. Helal Chemistry Department, Faculty of Science, Helwan University, Ain-Helwan 11795, Cairo, Egypt e-mail: [email protected]
structure of Ag2WO4@MIL-125-NH2 and smaller particles of Ag3VO4@MIL-125-NH2 formed onto the cotton. The prepared composites applied as photocatalysts in the degradation of Methylene Blue (MB) and Rhodamine B (RhB) dyes in the visible light. The highest photodegradtion of dyes observed for Ag2WO4@MIL-125-NH2@cotton and Ag3VO4@MIL-125-NH2@cotton composites because of their low optical band gaps (2.36 eV and 1.87 eV) and their quenching in luminescent spectrum which helped in the ease transfer of photoexcited electrons. The rate constant (k2) for the photodegradation of MB (RhB) dye reduced significantly from 1.78 9 10–3 (2.8 9 10–3) L/mg min to 0.43 9 10–3 –3 (1.04 9 10 ) L/mg min and 0.29 9 10–3 (0.79 9 10–3) L/mg min, when Ag2WO4 and Ag3VO4 incorporated in MIL-125-NH2@cotton composite, respectively. After 4 recycling process, the photodegradation activity of the applied composites diminished from 86–92% (68–80%) to 58–65% (47–54%). The obtained results declared the topmost photocatalytic activity in daylight of the recyclable prepared tri-component composites, reflecting their promising potentials in environmental applications.
R. M. Abdelhameed (&) Chemical Industries Research Division, Applied Organic Chemistry Department, National Research Centre, Scopus affiliation ID 60014618, 33 EL Buhouth St., Dokki 12622, Giza, Egypt e-mail: [email protected]
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Cellulose
Graphic abstract
Keywords Cotton Ag3VO4 Ag2WO4 MIL-125NH2 Recyclable photocatalyst Dye discoloration Visible light
Introduction Discharging of organic pollutants causes health problems to the local
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