These active complexes, obtained with polypyridine ligands, present low cost, low toxicity and good chemical stability.
Silicides have attracted considerable attention for use in thermoelectric generators due mainly to low cost, low toxicity and light weight, in contrast to conventional materials such as bismuth and lead telluride.
Olivine structure LiMnPO4 has been considered as one of the very promising electrodes for lithium-ion batteries because of their low cost, low toxicity and high voltage plateau compared with LiFePO4.
Paraffin is a material of low cost and toxicity that can be decomposed by bacteria.
Today, they are widely used as antimicrobial agent, chiefly because of their low cost, low toxicity and excellent activity against bacterial diseases [24].
In this category, polyethylene glycol (PEG) is the most popular solvent because of its low cost, low toxicity, reduced flammability, high thermal stability, recyclability and biological compatibility [39 41].
Among all these materials, manganese oxide (MnO2) has been conceived as a promising supercapacitive material because of its low cost, low toxicity, and environmental safety, as well as high theoretical capacities [10, 11, 12].
SnO2-based nanostructured materials have been attracting intensive research attention as high-capacity anodes for a variety of reasons, including their high theoretical capacity, low cost, low toxicity, and widespread availability.
LiNi0.4Co0.3Mn0.3O2 in the LiNixCoyMnzO2 system was chosen as an active material on the account of its low cost, low toxicity, thermal stability, high capacity, and good cycle life [31, 32].
The readily achievable critical point of sc-CO2 (T c = 31.1 ° C, P c = 73.7 bar) is one of its many advantages, which also include its low cost, low toxicity, no flammability, and the ability to tune the reactive properties by small variations, i.e., variation in temperature or pressure in the sc-CO2 density [1].
