Course detail

Ultrasonic Sonochemistry

FSI-9USCAcad. year: 2012/2013

The course initially instructs students of material science and chemistry about general principles of acoustic cavitation, bubble dynamics and factors which influence cavitation. The next part of the course incorporates a series of applications of sonochemistry which illustrate the types of physical and chemical effects of ultrasonically induced cavitation which will interest chemists and engineers alike. The final part reviews the range of ultrasonic equipment available in the laboratory and the progress made towards the scale-up of sonochemistry.

Language of instruction

Czech

Number of ECTS credits

2

Mode of study

Not applicable.

Guarantor

prof. RNDr. Jaroslav Cihlář, CSc.

Department

Institute of Materials Science and Engineering (ÚMVI)

Learning outcomes of the course unit

Not applicable.

Prerequisites

Not applicable.

Co-requisites

Not applicable.

Planned learning activities and teaching methods

Teaching methods depend on the type of course unit as specified in the article 7 of BUT Rules for Studies and Examinations.

Assesment methods and criteria linked to learning outcomes

Not applicable.

Course curriculum

Not applicable.

Work placements

Not applicable.

Aims

Not applicable.

Specification of controlled education, way of implementation and compensation for absences

Not applicable.

Recommended optional programme components

Not applicable.

Prerequisites and corequisites

Not applicable.

Basic literature

Mason T. J., Lorimer J. P.: Applied Sonochemistry, Wiley-VCH, Weinheim 2002
Luche J. L. and coworkers: Synthetic Organic Sonochemistry, Plenum Press, New York 1998
van Eldik R., Hubbard C. D.: Chemistry under Extreme or Non-classical Conditions, Wiley, New York 1997

Recommended literature

Not applicable.

Type of course unit

 

Lecture

20 hod., optionally

Teacher / Lecturer

prof. RNDr. Jaroslav Cihlář, CSc.

Syllabus

1. General principles of sonochemistry
- longitudinal and transverse waves (acoustic pressure)
- intensity and pressure amplitude
- sound adsorption
- bubble formation and cavitation threshold (effects of: particulate
matter, viscosity of medium, applied frequency, temperature;
motion of the bubble in US field; transient and stable cavitation)

2. Synthesis
- sites for sonochemical reactions (homogeneous liquid phase 
generation of radicals; heterogeneous systems: liquid – liquid
interface, solid – liquid interface  fragmentation, abrasion,
fusion).
- laws of sonochemistry
- homogeneous and heterogeneous sonochemistry (actions of US in homo- and heterogeneous systems)
- sonochemical preparation of powders and nanostructured materials
(results and their interpretations)
- sonochemical synthesis and degradation of polymers (mechanisms and
kinetics)
- sonoelectrochemistry ( electrooxidative and electroreductive
syntheses, organometallic synthesis)

3. US equipments and chemical reactor design
- piezoelectric and magnetorestrictive transducers
- ultrasonic apparatus – types (ultrasonic cleaning bath, direct
immersion sonic horn)
- laboratory scale US reactors
- practical considerations for process optimisation (optimisation
process for homogeneous and heterogeneous systems, combinations of
US with other techniques, recommendations for correct use of US
equipment)