Table 3.
Recent development in microemulsion-based synthesis of Rh NPs. CPB—cetylpyridinium bromide.
| Metal NP Composition | Microemulsion Type | Surfactant | Particle Size | Highlight(s) of Synthetic Method | Ref |
|---|---|---|---|---|---|
| Rh NPs | Normal microemulsion | Brij 96V | 3.9 nm | Synthesis of metal and metal oxide NPs including Rh by a normal microemulsion (less oil phase) | [89] |
| Rh mono- and bimetallic NPs supported on functionalized multi- and single wall CNTs | Reverse microemulsion | AOT | 5.6 nm and 4.6 nm for Rh and Pd-Rh, and 4.5 nm and 2.3 nm for Rh and Pt-Rh, respectively. | The bimetallic supported NPs showed a significant increase in their catalytic activity compared to monometallic supported NPs | [90,91] |
| Rh NPs supported on ZnO | Reverse microemulsion | Synperonic 13/6.5 | 2.1 nm | The selectivity of the microemulsion-synthesis Rh@ZnO NPs increased with respect to glycerol dehydrogenation but the activity compared to DP-solids decreased which could be caused by the presence of some remaining surfactant molecules around the particles after heating | [93] |
| Rh mono- and bimetallic NPs | Reverse microemulsion | AOT | 0.7–6.5 nm, and 2–4 nm | Smaller particles prepared by lower γ-irradiation doses | [94,95] |
| Rh NPs | Reverse microemulsion | AOT | 10 nm | Prepared a very good Rh NPs-modified Pt electrode which performed as an effective glucose biosensor in real blood samples | [96] |
| Rh NPs | Reverse microemulsion | AOT | 4 nm | Smaller particles with higher activity obtained by the microemulsion technique compared to MWv-method | [97] |
| Rh NPs | Normal microemulsion | CTAB | 1–2 nm | Using an ionic liquid to improve the micellization and the size control of the particles | [98] |
| Rh NPs | Polymer-micellar template | PEO-b-PMMA | 100 nm | Synthesizing mesoporous Rh NPs for the first time by applying a chemical reduction method | [99] |
| Rh NPs | Reverse microemulsion | CPB | 12 nm | Synthesizing a fibrous-structure of Rh NPs with high thermal and mechanical stability and high surface area | [100] |
| Pt-Rh@BHA NPs | Reverse microemulsion | (PPG-b-PEG-b-PPG) polymer | 4.1 nm | Prepared bimetallic Pt-Rh NPs with exceptionally high thermal stability and precise control of composition | [103] |
| Ce1−xRhxO2−y mixed oxide NPs | Reverse microemulsion | Triton X-100 | 4–5 nm | Prepared a range of Ce-Rh mixed oxide nanocrystals with a wide and higher range of Rh doping levels with their structural stability studied under oxidizing and reducing atmospheres | [110] |