NANOSISTEMI PER APPLICAZIONI ANALITICHE PER L'AMBIENTE E L'INDUSTRIA

Educational goals: to provide the student with scientific knowledge and ability to understand in the field of nanometric systems, with particular regard to the design and the fine tuning of the synthesis and characterization of colloids for the detection and the removal of anthropogenic pollutants. The aim of the course is oriented to stimulate autonomy of judgment and to promote ability in communication in the field.

Lessons.

If the course would be at distance, or in presence and at distance at the same time, the necessary and appropriate changes to the statement originally declared will be introduced to comply to the program reported in the syllabus.

Colloidal systems. Inorganic Colloids. Historical background. Synthetic procedures: top down and bottom up methods. Synthesis of Nanoparticles with different shapes: isotropic and anisotropic structures. Stabilization of colloids: role of capping agents and of attractive and repulsive forces in the aggregation processes. Electrical properties of colloids. Role of pH and ionic strength. Nanoparticles functionalization: physical absorption, chemisorption and covalent functionalization. Critical evaluation and optimization of the strategies of wet synthesis for the obtainment of gold and silver stable colloids. Most relevant methods of colloids characterization: TEM, DLS, AT-FTIR, PL spectroscopy.

Analytical applications: Nanostructured materials as objects (analytes) or tools involved in the analytical process. Analytical Nanosystems. Use of Nanoparticles as Tools in Analytical Processes.

Nanomaterials for the optimization of analytical procedures:

1) Purification and Preconcentration of Analytes.

2) Improvement of Chromatographic and Electrophoretic Separations.

3) Aggregation and fluorescence methods. Increasing the sensitivity in the Detection Processes: chiral discrimination of amino acids, quantitative determination of metal ions, of halide and sulfide ions and of biological analytes.

Catalytic applications: nanoparticles in photocatalysis. Catalysis in Oxidative Processes. Catalysis by Unsupported Nanoparticles. Evaluation of the catalytic performances of nanosystems by using model compounds.

Determination of nanoparticles in biological and environmental samples.

Series: Comprehensive Analytical Chemistry 66, Gold Nanoparticles in Analytical Chemistry, Miguel Valcárcel and Ángela I. López-Lorente (Eds.), Publisher: Elsevier, (2014) ISBN: 0444632859,978-0-444-63285-2

Letteratura scientifica.

Krajczewski, K. Kołątaj, A. Kudelski, Plasmonic nanoparticles in chemical analysis, RSC Adv., 7 (2017) 17559- 17576.

H I Badi’ah et al IOP Conf. Series: Earth and Environmental Science 217 (2019) 012005