Free-standing SiO2/TiO2-MoS(2)composite nanofibrous membranes as nanoadsorbents for efficient Pb(ii) removal

Author(s)

Mercante, Luiza A. ^{[1, 2]} ; Andre, Rafaela S. ^[1] ; Schneider, Rodrigo ^{[1, 3]} ; Mattoso, Luiz H. C. ^[1] ; Correa, Daniel S. ^{[1, 3]}

Affiliation

^[1] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr, BR-13560970 Sao Carlos, SP - Brazil

^[2] Fed Univ Bahia UFBA, Inst Chem, Gen & Inorgan Chem Dept, BR-40170280 Salvador, BA - Brazil

^[3] Univ Fed Sao Carlos, PPGQ, Dept Chem, Ctr Exact Sci & Technol, BR-13565905 Sao Carlos, SP - Brazil

• Document type: Journal article
• Source: NEW JOURNAL OF CHEMISTRY; v. 44, n. 30, p. 13030-13035, AUG 14 2020.
• Web of Science Citations: 0

Abstract

Concerns regarding improper disposal of heavy metals have been considerably increasing in the last years due to their deleterious effects on human health and the environment. Therefore, designing appropriate materials capable of removing metal ions from wastewater has become imperative. Herein, we report the use of flexible free-standing silicon dioxide/titanium dioxide (SiO2/TiO2) nanofibrous membranes (NFMs) functionalized with molybdenum disulfide (MoS2) for Pb(ii) removal. The proposed hybrid nanomaterial was characterized using field-emission gun scanning electron microscopy (FEG-SEM), transmission electron microscopy (TEM), energy-dispersive X-ray spectroscopy (EDS), X-ray diffraction (XRD), Raman spectroscopy and X-ray photoelectron spectroscopy (XPS). Benefiting from the large specific surface area, high porosity, and the interaction between sulfur and lead, the NFMs could decontaminate water samples with good Pb(ii) removal efficiency and recyclability. These excellent performances endow the modified nanofibrous membranes with great potential for application in wastewater treatment. (AU)

• FAPESP's process: 16/23793-4 - Development of nanostructured sensor aiming the detection of volatile compounds for food quality indicators
• Grantee: Rafaela da Silveira Andre
• Support Opportunities: Scholarships in Brazil - Post-Doctoral
• FAPESP's process: 18/18468-2 - Molybdenum disulphide (MoS2) nanostructures syntheses methodologies and evaluation of their potential application in pollutants adsorption systems
• Grantee: Rodrigo Schneider
• Support Opportunities: Scholarships in Brazil - Doctorate
• FAPESP's process: 17/12174-4 - Development of hybrid polymer nanofibers for agricultural applications
• Grantee: Daniel Souza Corrêa
• Support Opportunities: Regular Research Grants