Page 161 - Synthesis of Functional Nanoparticles Using an Atmospheric Pressure Microplasma Process - LiangLiang Lin

Table 9.1 Summary of the experiment design for the microplasma-assisted nanofabrication project
Epilogue
Chapter 3 Chapter 4 Chapter 5
Chapter 6 Chapter 7 Chapter 8
Precursor Fe(C5H5)2
TiCl4 Ni(C5H5)2
Y(NO3)3·6H2O
Ln(NO3)3·6H2O (Ln=Eu, Tb, Dy, Tm)
Tollens’ agent
Porudtcs
Fe3O4, Fe2O3
TiN Ni
Y2O3
3+ Ln :
Y2O3 Ag
Process design notes
Gas-phase
Fe(C5H5)2 dissociated in Ar to study the dissociation process Gas-phase
TiCl4 dissociated in Ar, H2 and N2 to produce TiN
Gas-phas
Ni(C5H5)2 dissociated in Ar at various conditions to study the magnetic properties Liquid-phase Plasma-electrochemical reduction of Y(NO3)3 solution to produce Y2O3
Liquid-phase Plasma-electrochemical reduction of lanthanide nitrate to produce Ln:Y2O3 phosphors Liquid-phase Plasma-electrochemical reduction of Tollens’ agent to produce Ag NP and study their anti-bacteria activity
Properties Magnetic
Plasmonic Magnetic
Host material of nanophosphors
Luminescent property
Anti-bacteria
9.2 Technology Assessment and Perspective
In summary, through the above comprehensive study of the microplasma-assisted nanofabrication processes, this thesis presents a simple, flexible and environmental friendly way to produce various nanomaterials by using the same plasma setup. This technique utilizes the synergistic advantages of micro reactors and the non-thermal plasma chemistry, resulting in a facile and innovative route for the synthesis of metallic nanoparticles both in gaseous or aqueous phase. Compared to the common wet chemistry methods, the microplasma-assisted process has the following key advantages in nanomaterial synthesis:
(1) Low temperature, atmospheric pressure operation, reducing the costs by excluding cooling system and expensive vacuum equipment.
(2) No solvents, catalysts or stabilizers are involved. As a result, potential side reactions and by-products have been significantly reduced, obviating the use of complex purification procedures (separation, centrifugation and washing) to get high purity products. Meanwhile, the aerosol/aqueous products can be easily to be collected.
(3) Continuous and compact process characterized as simple, efficient, safe and low power consumption, allowing one-step synthesis of nanomaterials and the realization of “in-flight” tuning of product properties.
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