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Facile hetero-assembly of superparamagnetic Fe3O4/BiVO4 stacked on biochar for solar photo-degradation of methyl paraben and pesticide removal from soil

2017; Elsevier BV; Volume: 337; Linguagem: Inglês

10.1016/j.jphotochem.2017.01.010

1873-2666

Amit Kumar, Shalini Karn, Gaurav Sharma, Mu. Naushad, Ajay Kumar, Susheel Kalia, Changsheng Guo, Genene Tessema Mola,

Advanced oxidation water treatment

Herein we report synthesis of nano-hetero assembly of superparamagnetic Fe3O4 and bismuth vanadate stacked on Pinus roxburghii derived biochar. Optical studies and band structure analysis indicate the hybridization between the two semiconductors facilitating photodegradation of pollutants in presence of natural sunlight. The nano-heterojunctions have been utilized for removal of emerging micro-pollutants as methylparaben (MeP). 97.4% of MeP degradation was achieved in presence of biochar/Fe3O4/BiVO4 in 2 h. A degradation pathway has also been proposed on basis of mass spectrometry, chemical oxygen demand analysis and effects of various scavengers. Pinus derived biochar has also been utilized to see its long term effect on soil characteristics and fertility. The biochar has also been used to remove excessive pesticide from soil for lesser bioavailability.