| Sl. number | Source | Nanoparticles synthesized | References |
| 1 | Olibanum | Ag | [18] | 2 | Latex of J. gossypifolia, J. curcas, and E. milii | Ag | [19] | 3 | Gum of Cochlospermum gossypium | Ag, Au, Pt | [20] | 4 | Latex of Euphorbia nivulia | Ag, Cu | [21] | 5 | Lemon peel | Ag | [22] | 6 | Orange peel | Ag | [23] | 7 | Citrus sinensis peel | Ag, Au | [24ā26] | 8 | Banana peel extracts | Pd, Ag | [27, 28] | 9 | Neem kernel | Ag | [29] | 10 | Annona squamosa | Pd, TiO2 | [30ā32] | 11 | B. hispida | Ag | [33] | 12 | C. infundibuliformis | Ag | [34, 35] | 13 | H. rosa-sinensis | Au, Ag | [36] | 14 | Corn cob | Cellulose-based nanoparticles | [37] | 15 | Psidium guajava | Ag | [38] | 16 | E. prostrate | Ag | [39] | 17 | P. juliflora | Ag | [40] | 18 | Piper betel leaf | Ag | [41] | 19 | J. curcas | Ag | [42] | 20 | Manihot esculenta | Cu2O | [43, 44] | 21 | A. hypogaea | Ag, Cu2O | [45, 46] | 22 | Pollen grains | TiO2 | [47] | 23 | Rice hulls | LiSi | [48] | 24 | Pomegranate peel | Ag | [49] | 25 | Palm oil effluent | Au | [50] | 26 | Rice husk | SiC, Si | [51, 52] | 27 | Rice hull | Si | [53] | 28 | V. radiata, A. hypogaea, C. tetragonolobus, Zea mays, P. glaucum, and S. vulgare | Ag | [54] | 29 | Cocos nucifera coir extract | Ag | [17] |
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