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Growth study of hierarchical Ag3PO4/LaCO3OH heterostructures and their efficient photocatalytic activity for RhB degradation

Abstract

We have demonstrated the synthesis of Ag3PO4/LaCO3OH (APO/LCO) heterostructured photocatalysts by in-situ wet chemical method. From pre-screening evaluations of the photocatalysts with APO/(x wt.% LCO) composites with mass ratios of x = 5, 10, 15, 20, 25, 30 wt. %, we found that the APO/LCO (20 wt. %) exhibits superior photocatalytic activities for organic pollutant remeadation. Therefore, an optimised photocatalyst APO/LCO (20 wt. %) is selected for present study and further investigated the effect of mixed solvent system (H2O:THF) on morphology which has direct effect on the photocatalytic performance. Interestingly, a propound effect on morphological features of APO/LCO20 heterostructures was observed with variation in the ratio of solvent system. From FESEM study it is observed that LCO sperical nanoparticles were transformed into nanorods with the variation of THF into solvent system. Moreover, these LCO nanorods make intimate contact with APO microstructures which is helpful for the improvement of photocatalytic activity. The photocatalytic activity of APO/LCO composites with different solvent ratios was evaluated by degration of rhodamine B (RhB) under visible light irradiation. The excellent photocatalytic activity was observed for APO/LCO-2 (H2O:THF=60:40) sample. This might be due to uniform covering of APO microstructures by fine LCO rod like structures offfering intimate contact between the APO and LCO and provide proper channels for degradation reactions. Further, with incresing THF volume ratio in reaction system led to increase of dimensions of LCO rod like structures and also loose compactness of their uniform intimate contact between APO/LCO heterostructures. All in all, the enhanced photocatalytic activity APO/LCO heterosturures are attributed to collective co-catalytic effect of LCO by providing accelerated charge separation through heterojunction interface and THF helps to tune unique morphological features which eventually fascilitates the photocatalyis process.

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Publication details

The article was received on 11 Apr 2017, accepted on 24 Jun 2017 and first published on 26 Jun 2017


Article type: Paper
DOI: 10.1039/C7CP02328F
Citation: Phys. Chem. Chem. Phys., 2017, Accepted Manuscript
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    Growth study of hierarchical Ag3PO4/LaCO3OH heterostructures and their efficient photocatalytic activity for RhB degradation

    V. G. Deonikar, S. S. Patil, M. S. Tamboli, J. D. Ambekar, M. V. Kulkarni, R. P. Panmand, G. G. Umarji, M. D. Shinde, S. B. Rane, N. R. Munirathnam, D. R. Patil and B. B. Kale, Phys. Chem. Chem. Phys., 2017, Accepted Manuscript , DOI: 10.1039/C7CP02328F

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