A novel organic pollutants gas sensing material p-type CuAlO2 microsphere constituted of nanoparticles for environmental remediation

Autor(es)

Thirumalairajan, S. ^[1] ; Mastelaro, Valmor R. ^[1]

Afiliação do(s) autor(es)

^[1] Univ Sao Paulo, IFSC, BR-13560970 Sao Carlos, SP - Brazil

• Tipo de documento: Artigo Científico
• Fonte: SENSORS AND ACTUATORS B-CHEMICAL; v. 223, p. 138-148, FEB 2016.
• Citações Web of Science: 8

Resumo

In this paper, novel organic pollutants gas sensing material CuAlO2 microspheres constituted of nanopartides were successfully prepared by wet chemical route and characterized by structural (XRD, XAS), morphological (SEM, TEM, HRTEM) and thermal (TG) analysis. In addition, the oxidation (O-3 and NO2) and reduction (NH3 and CO) toxic gas sensing properties of the prepared CuAlO2 microspheres were systematically investigated. CuAlO2 microspheres exhibited real-time response for very low detection level of 200 ppb at 200 degrees C, with fast response (29 s), recovery (45 s) time, good reproducibility and stability to ozone gas indicating their promising application in toxic gas sensor which is better than other oxidation and reduction gases. Also comparative studies of charge-transport properties mainly ascribed to the increased proportion of ozone gas exposed surface active layers are discussed in gas sensing mechanism. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• Processo FAPESP: 13/19049-0 - Síntese e caracterização do composto CuAlO2 nanoestruturado: uma investigação sistemática da dependência da sensibilidade a diferentes tipos de gases em função da morfologia
• Beneficiário: Thirumalairajan Subramaniam
• Modalidade de apoio: Bolsas no Brasil - Pós-Doutorado
• Processo FAPESP: 13/07296-2 - CDMF - Centro de Desenvolvimento de Materiais Funcionais
• Beneficiário: Elson Longo da Silva
• Modalidade de apoio: Auxílio à Pesquisa - Centros de Pesquisa, Inovação e Difusão - CEPIDs