Fabrication of BiOBr nanosheets@TiO2 nanobelts p–n junction photocatalysts for enhanced visible-light activity

The highly enhanced visible light photocatalytic degradation of gaseous o -dichlorobenzene through fabricating like-flowers BiPO 4 /BiOBr p-n heterojunction composites

“…On the basis of the above experimental results and the report of literatures [37,43], in order to further understand the separation process of photo-induced carriers, according to the results of DRS, the band edge positions of the conduction band (CB) and valence band (VB) of BiPO 4 /BiOBr photocatalysts can be determined using the following equation [55]:…”

“…On the other hand, p-n heterojunction, which can be as an efficient and promising method for enhancing the photocatalytic activity of BiOBr, can extend the probability of photo-induced electron-hole separation via an additional internal electric field [27,[34][35][36]. Up to now, some p-n heterojunction photocatalysts have been developed, for example BiOBr nanosheets@TiO 2 nanobelts [37], BiOBr/CoFe 2 O 4 [9] and Bi 2 WO 6 /BiOBr [38]. The results indicate that these p-n junction photocatalysts display much higher photocatalytic activity than the individual compound.…”

A review on TiO2-based Z-scheme photocatalysts

“…Many semiconductors, such as TiO2 [11][12][13][14][15], ZnO [16][17][18][19], SnO2 [20][21][22][23][24], Fe2O3 [25], BiVO4 [26][27][28][29][30][31], Cu2O [32][33][34][35][36], and WO3 [37][38][39][40], have been identified as potential photocatalysts under solar light. They have been used to catalyze a range of reactions, including water splitting for hydrogen generation [41,42], CO2 reduction for hydrocarbon fuel production [43][44][45][46][47][48][49], decomposition of harmful gases [50,51], and degradation of organic pollutants [52][53][54][55][56]. Thus, they represent potential solutions to environmental pollution and the energy crisis.…”

Fabrication of a novel separation-free heterostructured photocatalyst with enhanced visible light activity in photocatalytic degradation of antibiotics

“…Therefore, an internal electric field can be established in the TiO 2 /CuS interface. 66–71 When the heterojunction photocatalysts were irradiated with visible light, the electrons were excited from the VB of CuS to its CB because the CuS ( E g = 2.38 eV) could absorb visible light. Driven by the internal electric field, the photoelectrons on the CB of CuS could easily transfer to the CB of TiO 2 , and holes were concentrated on the VB of CuS.…”