Integración de sensores electroquímicos basados en nanomateriales funcionales para la detección de contaminantes en aguas
- Autores: Martha Raquel Baez Gaxiola
- Directores de la Tesis: Ernest Mendoza Gomez (dir. tes.), Cesar Fernandez Sanchez (codir. tes.), Maria Pau Ginebra i Molins (tut. tes.)
- Lectura: En la Universitat Politècnica de Catalunya (UPC) ( España ) en 2017
- Idioma: español
- Tribunal Calificador de la Tesis: Ramon Alcubilla González (presid.), Alex Fragoso Sierra (secret.), Dermot Diamond (voc.)
- Programa de doctorado: Programa de Doctorado en Ciencia e Ingeniería de Materiales por la Universidad Politécnica de Catalunya
- Materias:
- Enlaces
- Tesis en acceso abierto en: TDX
- Resumen
The aim of the present thesis is to fabricate, to applicate, and to integrate nanomaterial-based chemical sensors with electrochemical transduction for the detection of water pollutants.
This work is divided in 7 Chapters, among which Chapter 1 corresponds to an ¿Introduction¿ (Introducción), in which general aspects are reviewed to set the background of the issues addressed in this thesis, together with the state-of-the-art thereof.
Chapter 2, ¿Material Synthesis¿ (Síntesis de Materiales), describes the fabrication process of the electrochemical transducer, which is based on the composite material of carbon nanotubes and polystyrene that was used as a substrate for the growth of nanoparticles. Furthermore, in this chapter, the processes followed for the electrodeposition on the electrochemical transducer of gold, silver, copper, and bismuth nanoparticles used as recognition elements are described together with the nanoparticle morphological and chemical characterization, and their electrochemical behavior according to the desired application.
Chapters 3, 4, and 5 describe the application of the fabricated sensors. In Chapter 3, ¿Gold for Formaldehyde Detection¿ (Oro para la Detección de Formaldehído), a comparative study between gold nanoparticles and clusters (both for formaldehyde detection) is presented. Chapter 4, ¿Silver Microparticles for Sucralose Detection¿ (Micropartículas de Plata para la Detección de Sucralosa), includes the analysis of the interaction between silver and chloride ions as a basis for the subsequent application of this sensor for the analysis of the organochlorine sweetener sucralose. Chapter 5, ¿Bismuth for Heavy Metal Ions Detection" (Bismuto para la Detección de Iones de Metales Pesados)¿, deals with the detection of cadmium and lead using bismuth nanoparticles following two different methodologies by means of anodic stripping voltammetry.
Chapter 6, ¿Compact fluidic devices¿ (Dispositivos fluídicos compactos), addresses the integration of the sensors described in previous chapters in a compact fluidic platform with the aim of performing automatized continuous measurements. Two device generations were fabricated: the first-generation device permit to perform measurements with only one sensor, while the second-generation allows the integration of two different sensors to perform simultaneous measurements.
Finally, Chapter 7, ¿Conclusions¿ (Conclusiones), gather all the conclusions of this work.
