One-dimensional self-assembled Co2SnO4 nanosphere to nanocubes intertwined in two-dimensional reduced graphene oxide: an intriguing electrocatalytic sensor toward mesalamine detection. (March 2022)

• Record Type: Journal Article
• Authors: Hwa, K.Y.; Santhan, A.; Sharma, T.S.K.
• Is Part Of: Materials today chemistry. Volume 23(2022)
• Publication Date: 2022-03
• Subjects: Cobalt stannate -- Nanocubes -- rGO sheets -- Enriched active sites -- Mesalamine; Chemistry -- Periodicals; Materials -- Research -- Periodicals; Materials science -- Periodicals; Chemistry; Materials -- Research; Electronic journals; Periodicals; 660.282
• DOI: 10.1016/j.mtchem.2021.100739
• Languages: English
• ISSNs: 2468-5194

Abstract

Abstract: The present work deals with the preparation of hybridized electrode material with electrostatic self-assembly strategy for mesalamine (MES) detection. Grabbing significant abilities between the one-dimensional bimetallic oxides and two-dimensional nanosheets network, a nanohybrid was designed. The developed cobalt stannate/reduced graphene oxide (Co2 SnO4 /rGO)-1D/2D heterostructure will possess improvised anisotropic electron transport, earth abundant, highly conducting, multiple actives site, and higher surface area. The 1D/2D nanostructured architecture will enhance faster electron and mass transport during the electrochemical analysis, which is more significant for MES detection. Progressive testing of Co2 SnO4 /rGO for structural analysis was done, and highly crystalline nature was proved. The self-assembled nanospheres to form nanocube such as Co2 SnO4 strongly attached over the rGO matrix was confirmed with field emission scanning microscope, and nanocube structure is more visible with high-resolution transmission electron microscopy. The hierarchical highly electroactive material establishes lower detection limit at 4.9 nM with sensitivity of about 8.57 μA/μM/cm 2 . The interfacial area of nanocomposite with higher conducting channels to improve the interactions with MES resulted in enhanced selectivity. The practical analysis in environmental, pharmaceutical, and biological fluids (human urine and serum) showed good recovery. The Co2 SnO4 /rGO will be more prominent and significant as electrode material in electrochemical sensing. Graphical abstract: Image 1 Highlights: Self-assembled (1D) Co2 SnO4 nanospheres to nanocubes were formed via hydrothermal synthesis. The carbon matrix rGO (2D) integrated with Co2 SnO4 provides excellent active sites for mesalamine detection. The LOD was about 4.9 nm with a sensitivity of 8.57 μA/μM/cm 2 . The real sample sensing with the Co2 SnO4 /rGO electrode exhibited good recovery results. The fabricated sensor exhibits extraordinary performance owing to highsurface area.