60
S. Kakkar et al.
Fig. 7 Types of bimetallic
nanoparticles
Bimetallic Nanoparticles
Porous
nanoparticles. Factors that influence the synthesis of nanoparticles are shown in
Fig. 8.
1. Mode of synthesis: The synthesis of nanoparticles by physical and chemical methods includes mechanical protocols and various chemicals (organic and
inorganic). The biological protocols involve natural products, respectively. The
chemical and physical methods are very costly and their synthesized nanoparticles show several harmful effects on the environment. The biological modes
of synthesis of nanoparticles are used widely because this mode of synthesis
of nanoparticles is non-toxic and environmentally friendly in nature (Marchiol
2012; Patra and Baek 2014).
2. pH: pH is the most important and prominent factor for the synthesis of nanoparticles. It influences the size, texture, mode of synthesis of nanoparticles by alteration in the consistency of the media, or by altering the pH of the solution
media.
Fig. 8 Factors that influence
the synthesis of nanoparticles
Mode of synthesis
pH
Temperature
Time
Pressure
Particle shape, size
Environment