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Fig. 11 | Sustainable Environment Research

Fig. 11

From: Functionalization of hydroxyapatite derived from cockle (Anadara granosa) shells into hydroxyapatite–nano TiO2 for photocatalytic degradation of methyl violet

Fig. 11

a Comparison on MV photooxidation kinetics by fresh and recycled photocatalysts by HAp-nTiO2, and (b) Comparison on MV photooxidation kinetics by fresh and recycled photocatalysts by TiO2 (c) Comparison on degradation efficiency of MV photooxidation by fresh and recycled photocatalysts [Initial MV concentration = 100 mg L− 1, Time of sampling = 60 min, H2O2 = 10− 4 M, catalyst dosage = 0.25 g L− 1]

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Sustainable Environment Research

ISSN: 2468-2039

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