One-pot sono-enhanced EG/EtOH-thermal design of nano-structured bismuth oxide formate and bismuth molybdenum oxide and their competitive evaluation in hetero-photocatalytic deletion of RhB under simulated sunlight

By the development of industries, the amount of organic pollutants has also increased in the environment significantly. Dye contaminants which are more resistant are one of them. To tackle this issue, various forms of techniques are applied, but the photocatalytic approach has attracted a lot of attention as one of the most environmentally friendly method. In the present study, bismuth oxide formate (BiOCOOH) and bismuth molybdenum oxide (Bi₂MoO₆) nanophotocatalysts have been prepared by one-pot sono-enhanced EG/EtOH-thermal synthesis for elimination of rhodamine B (RhB) under simulated sunlight. In comparison to the previous woks, as-synthesized BiOCOOH showed higher photodegradation potential towards RhB pollutant owing to the effect of ultrasound wave. Herein, BiOCOOH could degrade 10 mg/L RhB up to 96.91% unexpectedly during 120 min under simulated sunlight. But, the decolourization capability of Bi₂MoO₆ over 10 mg/L RhB was calculated to be 68%.  Moreover, BiOCOOH and Bi₂MoO₆ as layered nanophotocatalysts has shown unique morphologies due to the presence of two solvents (ethylene glycol and ethanol) and the use of ultrasonic waves during synthesis which affected the growth of crystals and their sizes. Moreover, crystallographic and morphological analyses are used to demonstrate the true synthesis of nanophotocatalysts and the discussion of results gained.

 

Author(s): Mahdiyeh Mohammadzadeh

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