Room Temperature Synthesis and Photocatalytic Activity of Magnetically Recoverable Fe3O4/BiOCl Nanocomposite Photocatalysts

Recyclable magnetic CoFe2O4/BiOX (X = Cl, Br and I) microflowers for photocatalytic treatment of water contaminated with methyl orange, rhodamine B, methylene blue, and a mixed dye

“…34 For a photocatalytic reaction, the role of active species is very important and has been studied extensively using a number of methods, such as LC-MS, 34,41,42 scavenger tests 34 and DMPO (5,5-dimethyl-1-pyrroline N-oxide) electron paramagnetic resonance (EPR) spin trapping techniques. 21,31,43 A literature summary (ESI, Table S1 †) [32][33][34][35][36][37][38][39][40] clearly showed the novelty of the present study. The previously reported BiOX-based magnetic photocatalysts include BiOCl-SrFe 12 O 19 , 32 Fe 3 O 4 @C@BiOCl, 33 BiOBr@SiO 2 @Fe 3 O 4 , 34 Fe 3 O 4 /BiOCl, 35,36 Fe 3 O 4 @SiO 2 @BiOBr, 37 BiOBr/Fe 2 O 3 , 38 BiOBr-ZnFe 2 O 4 , 39 and Fe 3 O 4 /BiOI.…”

“…21,31,43 A literature summary (ESI, Table S1 †) [32][33][34][35][36][37][38][39][40] clearly showed the novelty of the present study. The previously reported BiOX-based magnetic photocatalysts include BiOCl-SrFe 12 O 19 , 32 Fe 3 O 4 @C@BiOCl, 33 BiOBr@SiO 2 @Fe 3 O 4 , 34 Fe 3 O 4 /BiOCl, 35,36 Fe 3 O 4 @SiO 2 @BiOBr, 37 BiOBr/Fe 2 O 3 , 38 BiOBr-ZnFe 2 O 4 , 39 and Fe 3 O 4 /BiOI. 40 However, all the catalysts 32,33,[35][36][37][38][39][40] were only tested with pure MO, RhB and MB dyes.…”

“…30 The development of magnetic photocatalysts are of interest with the benet of recyclability, even though in some cases, the catalytic activity is degraded aer introducing magnetic materials into the host photocatalyst. [31][32][33][34][35][36][37][38][39][40] Magnetic SrFe 12 O 19 was found to inhibit the growth of BiOCl along the [001] direction to expose the {001} facet. Furthermore, it induced visible light absorption (change in band gap from 3.3 eV to 2.8 eV aer loading the magnetic material) and charge separation to increase photocatalytic MB degradation.…”

Novel plate-stratiform nanostructured Bi12O17Cl2 with visible-light photocatalytic performance

“…As the representative photocatalyst of Bi-based oxychlorides, BiOCl reveals higher photocatalytic activity than TiO 2 under UV irradiation (Chen et al, 2010;Zhang et al, 2013). However, similar to traditional semiconductor photocatalysts, BiOCl could not photodegrade organic dye under visible light because of wide band gap between 3.19 and 3.44 eV and some modification routes were applied for the purpose of extending light-responsive range into visible light (Li et al, 2011a(Li et al, , 2011bTan et al, 2013;Tian et al, 2013;Ao et al, 2014;Xie et al, 2014;Zhu et al, 2014).…”

BiOCl dispersed on NiFe–LDH leads to enhanced photo-degradation of Rhodamine B dye

“…One way is to combine BiOCl with other photocatalysts in order to improve the photocatalytic performance. For example, Tan et al (2013) combined Fe 3 O 4 and BiOCl and successfully synthesized the Fe 3 O 4 /BiOCl composite, which has a higher efficiency in decomposing RhB than that of individual Fe 3 O 4 or BiOCl. The photocatalytic efficiency of the above composite remained at a high level after five cycling operations.…”