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. 2018 Apr 23;12(5):678–687. doi: 10.1049/iet-nbt.2017.0139

Fig. 6.

Fig. 6

UV‐vis study of green synthesis TiO2 NPs using the first and second procedures of A. cepa and the first and second procedures of C. annum plants extracts.

(a) absorptions spectrum, (b) (ahv)2 versus photon energy and estimated optical absorption bandgap.