‘Green’ synthesis of metals and their oxide nanoparticles: applications for environmental remediation

Table 1 Examples of metallic nanoparticles prepared in ILs by a chemical reduction method

S. no.	Metal NPs	Metal salt	Reducing agent	Ionic liquid	Size (nm)	References
1	Ag	AgBF₄	H₂, 85 °C, 4 atm BIm as scavenger	[BMIm][BF₄] [BMIm][PF₆]	0.8–2.8 1.3–4.4	[148]
2	Ag	AgBF₄	H₂	[BMIm][BF₄] [BMpy][TfO]	~ 9 (DLS) ~ 11 (DLS)	[149]
3	Ag	AgBF₄	[BMIm][BH₄]	[BMIm][BF₄] purified and H₂O	0.8–4.4 4.0 0.9–4.5	[47]
4	Ag	AgNO₃	Tween 85	[BMIm][PF₆]	3–10	[150]
5	Au	HAuCl₄	Ascorbic acid	[BMIm] [C₁₂H₂₅OSO_3] (lauryl sulfate)	20–50	[151]
6	Au	HAuCl₄	NaBH₄	[ShexMIm][Cl]	5	[152]
7	Au	HAuCl₄	NaBH₄	[BMIm][BF₄] in a microfluidic reactor	0.5–4	[153]
8	Au	HAuCl₄-3H₂O	Glycerol	[EMIm][TfO], [EMIm][MeSO₃]	5–7 low temp. 5–7 aggregate at higher temp.	[154]
9	HAuBr₄		Me₂NCHO (DMF)	[Me₂NH₂][Me₂NCO₂] with small amounts of DMF	2–4	[155]
10	Cu	Cu(OAc)₂-H₂O	H₂NNH₂-H₂O (hydrazine hydrate)	[BMIm][BF₄]	80–130	[156]

ISSN: 1477-3155