Enhanced photocatalytic performance of Er-doped Bi 24 O 31 Br 10 : Facile synthesis and photocatalytic mechanism

Influence of the Facets of Bi24O31Br10 Nanobelts and Nanosheets on Their Photocatalytic Properties

“…The spacing between adjacent lattice planes of 0.28 nm was ascribed to the (117) facet [22]. The interfacial angle between the (117) and (1)(2)(3)(4)(5)(6)(7)(8)(9)(10)(11)(12)(13)(14)(15)(16)(17) planes was estimated to be 89°, as shown by the selected area electron diffraction patterns (SAED, Figure 2d), and is consistent with the theoretical value. Therefore, the (117) facet was identified as the main exposed facet of the BOB-NS.…”

“…Therefore, tremendous research efforts have been devoted to improving its photocatalytic activity. Some studies have demonstrated that the photocatalytic activity of Bi 24 O 31 Br 10 can be further enhanced by doping it with other elements, for example Bi 24 O 31 Cl x Br 10−x and Er-doped Bi 24 O Br 10 [10,11]. This could also be achieved by controlling the three-dimensional (3D) morphology and thickness of Bi 24 O 31 Br 10 NSs [12][13][14] [15][16][17], and the synthesis of Bi 24 O 31 Br 10 with oxygen and bromine vacancies or the formation of Bi 24 O 31 Br 10 (OH) [18][19][20].…”

One‐pot combustion synthesis and efficient broad spectrum photoactivity of Bi/BiOBr:Yb,Er/C photocatalyst

“…Figure F shows the O 1s high‐resolution spectra of as‐synthesized samples. After deconvolution, both Bi/BiOBr/C and Bi/BiOBr:Yb,Er/C have 3 peaks at ~530.5, ~532.2, and ~533.6 eV, which are related to the oxygen in BiOBr lattice, C=O groups, and other components (such as –OH and H 2 O) adsorbed on the surface of samples, respectively . Combining with the above C 1s results, the peaks at ~532.0 and ~533.6 eV can mainly be ascribed to the oxygen‐containing functional group in the carbon species.…”

Intensive photocatalytic activity enhancement of Bi 5 O 7 I via coupling with band structure and content adjustable BiOBr x I 1− x

“…In recent years, various laminar bismuth oxyhalide substances have been found and gradually developed to be a huge species widely applied in photocatalysis field. Except for the most simple BiOX (X = Cl, Br, I) system [8][9][10][11][12], much more attention has been paid to the complicated Bi a O b X c (X = Cl, Br, I) system, such as Bi 3 O 4 X (X = Cl, Br) [13][14][15], Bi 12 O 17 X 2 (X = Cl, Br) [16][17][18][19], Bi 4 O 5 X 2 (X = Cl, Br, I) [20][21][22][23][24], Bi 24 O 31 Br 10 [25][26][27][28][29] and Bi 5 O 7 I [30][31][32][33][34][35][36][37][38][39][40][41][42][43][44][45][46][47]. Although many of them have broad visible light absorption range and possess good photocatalytic activity, however, the weak photocharges separation efficiency of pure Bi a O b X c (X = Cl, Br, I) is still obvious and must be overcome.…”

“…As reported, morphology regulation [48], ion doping [24,36], heterojunction construction [17,18,26,32,35,37,40] and noble metal deposition [27,39] are efficient strategies used in Bi a O b X c (X = Cl, Br, I) system to improve the light absorption performance as well as the photocharges separation efficiency. Among the abovementioned modulation methods, ion doping is the direct way to regulate the band structure or semiconductor via introducing external or internal element.…”