A novel nanocomposite (g-C3N4/Fe3O4@P2W15V3) with dual function in organic dyes degradation and cysteine sensing. (October 2022)

• Record Type: Journal Article
• Authors: Housaindokht, Mohammad Reza; Jamshidi, Ali; Zonoz, Farrokhzad Mohammadi; Firouzi, Mojtaba
• Is Part Of: Chemosphere. Volume 304(2022)
• Publication Date: 2022-10
• Subjects: Composite material -- Polyoxometalate -- Photocatalytic degradation -- Colorimetric sensor; Pollution -- Periodicals; Pollution -- Physiological effect -- Periodicals; Environmental sciences -- Periodicals; Atmospheric chemistry -- Periodicals; 551.511
• DOI: 10.1016/j.chemosphere.2022.135305
• Languages: English
• ISSNs: 0045-6535

Abstract

Abstract: Among the important needs of human societies is the elimination of environmental pollution and also the construction of high-performance and inexpensive biosensors. In this regard, the construction of multi-functional composites has been considered. A novel magnetic graphite carbon nitride decorated by tri-vanadium substituted Dawson-type heteropolytungstate nanocomposite (C3 N4 /Fe3 O4 @P2 W15 V3 ) effectively synthesized and characterized by prevalent functional analysis. The prepared nano-catalyst presents bi-functional usage involving photocatalytic removal of dyes (methylene blue, congo red and phenyl red) (around 98%) under visible light radiation and greatly sensitive colorimetric sensing of cysteine in an aqueous media. Moreover, synthesized nano-catalyst successfully recovered five times without any considerable deficiency on its photocatalytic ability. Further, Moreover, we propose a novel method for cysteine detection based on the C3 N4 /Fe3 O4 @P2 W15 V3 nanocomposite. This nanocomposite displayed a privileged catalytic feature for cysteine oxidation to extend a clock reaction of methylene blue as an indicator in the presence of NaBH4 in acidic solution. More importantly, this colorimetric sensing method of cysteine presents an easy, low-cost, selective, and rapid colorimetric assay with a detection limit value of 7.2 μM in the acceptable linear range of 5–600 μM. Graphical abstract: Image 1 Highlights: The Preparation and characterization of a novel and green photocatalyst abbreviated g-C3 N4 /Fe3 O4 @P2 W15 V3 . The g-C3 N4 /Fe3 O4 @P2 W15 V3 has been used for the degradation of organic dyes. The g-C3 N4 /Fe3 O4 @P2 W15 V3 photocatalyst exhibits great recovery ability and photodegradation activity than pristine g-C3 N4 . Efficient colorimetric sensing of Cys with g-C3 N4 /Fe3 O4 @P2 W15 V3 system.