Enhanced photocatalytic degradation of glyphosate over 2D CoS/BiOBr heterojunctions under visible light irradiation

Self-Assembly of a 3D Hollow BiOBr@Bi-MOF Heterostructure with Enhanced Photocatalytic Degradation of Dyes

“…33 As shown in Figure 3c, the O 1s XPS spectrum of BiOBr could be deconvoluted into three peaks at 529.4, 530.8, and 532.3 eV, which were attributed to Bi−O, the surface −OH, and absorbed H 2 O (O w ), respectively. 20,47 Significantly, the proportion of surface −OH was enhanced in comparison with pristine BiOBr, while the percentage of Bi−O decreased, which was in agreement with EDS results and further determined the existence of Bi-MOF on the surface of BiOBr. 24,48 Noteworthily, compared to the original BiOBr, the binding energies of Bi 4f, Br 3d, and O 1s in BiOBr@Bi-MOF show significant positive shifts, suggesting that photogenerated electrons on the surface of BiOBr tended to migrate to Bi-MOF, thereby improving the separation efficiency of electron−hole pairs.…”

“…Two peaks located at 158.7 and 164.0 eV for BiOBr (Figure 3a) were ascribed to Bi 4f 7/2 and Bi 4f 5/2 , respectively. 47 On the other hand, it can be seen from Figure 3b that the binding energies of 67.6 and 68.6 eV were assigned to Br 3d 5/2 and Br 3d 3/2 of BiOBr, respectively. 33 As shown in Figure 3c, the O 1s XPS spectrum of BiOBr could be deconvoluted into three peaks at 529.4, 530.8, and 532.3 eV, which were attributed to Bi−O, the surface −OH, and absorbed H 2 O (O w ), respectively.…”

“…Meanwhile, BiOBr can effectively absorb visible light due to its suitable band gap (2.4−2.9 eV). 32 Regrettably, the photocatalytic activity of pure BiOBr is severely limited in practical applications owing to the low separation and transfer efficiency of carrier pairs, limited efficiency of light absorption, small adsorption capacity, and inadequate specific surface area. 33−35 Recently, BiOBr/MOF composites have shown excellent chemical stability and outstanding ability to degrade organic contaminants in water under visible light irradiation.…”

“…Bismuth oxybromide (BiOBr) not only has a unique hierarchical structure, namely, Bi 2 O 2 2+ and double bromine slab interlaced distribution, , but also exhibits outstanding optical and catalytic attributes in terms of photocatalytic energy conversion and environmental restoration. , This special layered structure can generate an internal electric field, which is conducive to the separation and migration of photogenerated charge pairs to a certain extent. Meanwhile, BiOBr can effectively absorb visible light due to its suitable band gap (2.4–2.9 eV) . Regrettably, the photocatalytic activity of pure BiOBr is severely limited in practical applications owing to the low separation and transfer efficiency of carrier pairs, limited efficiency of light absorption, small adsorption capacity, and inadequate specific surface area. − Recently, BiOBr/MOF composites have shown excellent chemical stability and outstanding ability to degrade organic contaminants in water under visible light irradiation. , Particularly, MOF-modified BiOBr can promote the separation of carriers while increasing the specific surface area owing to the adjustable pores and structural flexibility of MOFs .…”

Insight into removals of PARAFAC components from dissolved and particulate organic matter in wastewater treatment process by two-dimensional correlation and structure equation modeling

“…Hence, 2D-COS was applied for the fluorescence data of the excitation spectroscopies originated from PARA-FAC components, to competently discriminate the order of the fluorescence peaks in either components or in a component. 2D-COS excitation spectroscopies were conducted with a program of "2D Shige software", which was released from K wansei-Gakuin University, Japan [29].…”