Detection of hydrogen peroxide (H2O2) using a colorimetric sensor based on cellulose nanowhiskers and silver nanoparticles

Autor(es)

Teodoro, Kelcilene B. R. ^{[1, 2]} ; Migliorini, Fernanda L. ^[2] ; Christineili, Wania A. ^[2] ; Correa, Daniel S. ^{[1, 2]}

Afiliação do(s) autor(es)

^[1] Fed Univ Sao Carlos UFSCar, Ctr Exact Sci & Technol, Dept Chem, PPGQ, BR-13565905 Sao Carlos, SP - Brazil

^[2] Embrapa Instrumentacao, Nanotechnol Natl Lab Agr, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: Carbohydrate Polymers; v. 212, p. 235-241, MAY 15 2019.
• Citações Web of Science: 3

Resumo

Hydrogen peroxide (H2O2) is an important compound for several industrial sectors, but it becomes harmful to human health under high concentrations. Thus, the development of simple, low cost and fast analytical methods capable to detect and monitor H2O2 is fundamentally important. In the present study, we report a simple route for synthesizing silver nanoparticles (AgNPs) in the presence of a nanostructured polysaccharide (cellulose nanowhiskers) to produce a hybrid material, which was employed as a colorimetric probe for H2O2 detection. Our results revealed that AgNPs tend to experience catalytic decomposition when exposed to H2O2, causing a decrease of AgNPs absorption band at 410 nm in accordance with H2O2 concentration. This decrease was linearly dependent on H2O2 concentration (in the ranges 0.01-30 mu M and 60-600 mu M), yielding limits of detection of 0.014 mu M and 112 mu M, respectively. The easy-to-interpret H2O2 sensor also proved to be suitable for real samples analysis even in the presence of other interfering substances. (AU)

• Processo FAPESP: 18/09414-6 - Emprega do língua eletrônica utilizando sistema de análise em fluxo para análise de contaminantes em águas para consumo
• Beneficiário: Fernanda Lanzoni Migliorini
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 17/12174-4 - Desenvolvimento de nanofibras poliméricas híbridas para aplicação na agricultura
• Beneficiário: Daniel Souza Corrêa
• Modalidade de apoio: Auxílio à Pesquisa - Regular
• Processo FAPESP: 14/21184-5 - Nanocompósitos a partir de nanocristais de celulose e fibras eletrofiadas para o desenvolvimento de sensores poliméricos
• Beneficiário: Kelcilene Bruna Teodoro Costa
• Modalidade de apoio: Bolsas no Brasil - Doutorado