Removal of bisphenol A by mesoporous BiOBr under simulated solar light irradiation

Abstract

3D mesoporous BiOBr microspheres were fabricated via a facile, rapid and environmentally friendly one-step solvothermal process without using templates. The physiochemical properties of BiOBr were characterized by XRD, FESEM, TEM and nitrogen adsorption techniques. The photodegradation behaviors of bisphenol A (BPA) catalyzed by BiOBr were investigated under simulated solar light irradiation. The photocatalytic activities of the BiOBr were superior to that of commercial Degussa P25 TiO 2 . Particular attention was paid to the identification of intermediates and acute toxicity of photocatalytic degradation samples of BPA by GC-MS and bioluminescence bacteria, respectively. Deducing from the results, BiOBr can be a good kind of catalyst irradiated by visible light even under sunlight.

The Multiple Effects of Precursors on the Properties of Polymeric Carbon Nitride

“…The photocatalytic performance of the as-prepared samples was further evaluated by removal of NO in gas phase in order to demonstrate their potential ability for indoor air purification under visible light irradiation at room temperature (Figure 7). There are four reactions of the photocatalytic materials, which involved that NO reacted with the photo-generated reactive radicals and produced HNO 2 and HNO 3 displayed in the following [39]: International Journal of Photoenergy 0.298 min −1 ), respectively. Generally, CN-T, CN-D, and CN-M with narrower band gaps than CN-U (see Table 2) are favorable for photocatalytic reaction, due to the enhanced visible light absorption with more available photogenerated electron hole.…”

A facile and efficient solvothermal fabrication of three-dimensionally hierarchical BiOBr microspheres with exceptional photocatalytic activity

“…3(a, c and e)). Through careful observation, a number of opened hierarchically porous structures can be found on the surface of uniform microspheres, suggesting that the photocatalysts have large pore volume [17]. Importantly, the presence of hierarchical structures would supply more reaction active sites and benefit the separating efficiency of the photogenerated electron and hole, resulting in a considerable effect on the enhancement of the photoactivity of BiOBr [7].…”

A Review on BiOX (X= Cl, Br and I) Nano-/Microstructures for Their Photocatalytic Applications

“…Among the various fabrication of BiOX nanostructures hydro/solvothermal and hierarchical techniques have proven to be more promising than other techniques. [54][55][56][57][58][59][60][61][62][63][64][65][66][67][68][69][70][71][72][73] In a study by Tang et al, 61 3D microspherical BiOBr structures were synthesized via ethylene assisted solvothermal route, the band gap of BiOBr was found to be 2.54 eV due to which it was able to perform much higher photocatalytic degradation of MO than BiOBr bulk plates under visible light irradiation. On the other hand, Zhang et al, 54 used a [96][97][98][99] Mu and coworkers 95 fabricated a thin layer of vertical BiOCl nanosheet array on a substrate of FTO (fluorine doped tin oxide) via the solvothermal route.…”