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(Reference retrieved automatically from Web of Science through information on FAPESP grant and its corresponding number as mentioned in the publication by the authors.)

Palladium-Loaded Hierarchical Flower-like Tin Dioxide Structure as Chemosensor Exhibiting High Ethanol Response in Humid Conditions

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Zito, Cecilia A. [1] ; Perfecto, Tarcisio M. [1] ; Volanti, Diogo P. [1]
Total Authors: 3
[1] Sao Paulo State Univ, UNESP, Lab Mat Sustainabil LabMatSus, R Cristovao Colombo 2265, BR-15054000 S J Rio Preto, SP - Brazil
Total Affiliations: 1
Document type: Journal article
Source: ADVANCED MATERIALS INTERFACES; v. 4, n. 22 NOV 23 2017.
Web of Science Citations: 10

The impact of humidity is a crucial factor in the sensing performance of a chemiresistive gas sensor. Therefore, strategies for developing sensors with a small humidity dependence are required. Herein, the volatile organic compound (VOC)-sensing performance of palladium-loaded hierarchical flower-like tin dioxide structures (Pd/FL-SnO2) under humid conditions is reported. To prepare the Pd/FL-SnO2 heterostructures, FL-SnO2 is first synthesized using a microwave-assisted solvothermal method, followed by calcination, and then is loaded with Pd nanoparticles (NPs). VOC-sensing studies are conducted in dry and wet air with relative humidities (RHs) between 25% and 98%. FL-SnO2 and Pd/FL-SnO2 exhibit an enhanced response toward ethanol in comparison with other VOCs, including acetone, benzene, methanol, m-xylene, and toluene. However, FL-SnO2 with Pd NPs has a substantially decreased optimal working temperature, from 340 to 140 degrees C, and an improved selectivity. Furthermore, the ethanol response of the Pd/FL-SnO2 heterostructures is preserved under humid conditions, whereas the response of FL-SnO2 is significantly affected by humidity. The response to 100 ppm of ethanol under 98% RH is 3.1 and 8.0 for neat FL-SnO2 and 5% Pd/FL-SnO2 heterostructure, respectively. The ethanol-sensing performance enhancement under high humidity is attributed to the Pd/SnO2 heterointerface. (AU)

FAPESP's process: 17/01267-1 - Graphene acid-hollow metal oxides composites for gas sensor
Grantee:Diogo Paschoalini Volanti
Support type: Regular Research Grants
FAPESP's process: 14/17343-0 - Effect of metal catalysts or reduced graphene oxide on metal oxides semiconductors for detection of volatile organic compounds
Grantee:Diogo Paschoalini Volanti
Support type: Regular Research Grants
FAPESP's process: 15/05916-9 - Synergy between Pd-SnO2 or reduced graphene oxide-SnO2 for volatile organic compounds detection in humidity
Grantee:Cecilia de Almeida Zito
Support type: Scholarships in Brazil - Master
FAPESP's process: 16/04371-1 - Sensors based on reduced graphene oxide-WO3 and Ag-WO3 obtained by microwave-assisted ultrasonic spray and deposited on paper for detection of volatile organic compounds
Grantee:Tarcísio Micheli Perfecto
Support type: Scholarships in Brazil - Master
FAPESP's process: 13/23886-4 - Study on selectivity of hydrogenolysis / reductive hydrogenation processes of sugarcane bagasse under supercritical state catalyzed by structured metal oxides
Grantee:Mauricio Boscolo
Support type: Program for Research on Bioenergy (BIOEN) - Regular Program Grants