S-scheme heterojunction BP/WO3 with tight interface firstly prepared in magnetic stirring reactor for enhanced photocatalytic degradation of hazardous contaminants under visible light

Enhanced photocatalytic performance of anatase titania nanotubes via the synergistic effect of trace copper doping and oxygen vacancies

“…In the case of Cu@ANTs, the conduction band potential is À0.49 V vs. NHE, which is lower than that of O 2 / O 2 À (À0.33 V vs. NHE). Therefore, the photogenerated electrons in CB possess the greater reducing ability, which is 80 Combining the above experimental results of free radical quenching, we can conclude that the main process of the photocatalytic reaction is that photogenerated holes react with H 2 O to form OH, and O 2 À also reacts with water to form OH. Therefore, the decrease in photocatalytic efficiency was the most serious after the addition of IPA.…”

“…Therefore, the photogenerated holes in VB can oxidize H 2 O to ˙OH. 80 Combining the above experimental results of free radical quenching, we can conclude that the main process of the photocatalytic reaction is that photogenerated holes react with H 2 O to form ˙OH, and ˙O 2 − also reacts with water to form ˙OH. Therefore, the decrease in photocatalytic efficiency was the most serious after the addition of IPA.…”

“…Given the good photocatalytic performance of Cu@ANTs towards RhB, we evaluated its adaptability to more types of pollutants. Tetracycline hydrochloride (TCH), 80 ciprofloxacin (CIP), 69 phenol, 81 and bisphenol A (BPA) 82 were selected as representatives of antibiotics, chemical products, and endocrine disruptors. The degradation results are shown in Fig.…”

“…These species can further react with other species, such as water and oxygen, to generate reactive substances, such as ˙OH and ˙O 2 − , that can facilitate the degradation of pollutants. 80 In order to determine the types of free radicals, we performed electron paramagnetic resonance (EPR) characterization, and selected DMPO as the capture agent for ˙OH and ˙O 2 − , and the results are shown in Fig. 10.…”

2D–2D WO3–Bi2WO6 photocatalyst with an S-scheme heterojunction for highly efficient Cr(vi) reduction

“…20–25 Particularly, construction of 2D/2D WO 3 heterostructures has been proved to be a good method to improve the photocatalytic performance of semiconductors. 16,26–46 The n-type semiconductor Bi 2 WO 6 is an ideal selection for constructing a heterojunction with WO 3 , due to its unique layered structures composed of corner-shared WO 6 octahedral layers and [Bi 2 O 2 ] 2+ layers. 47–58 Once Bi 2 WO 6 and WO 3 form a 2D/2D heterojunction, a superior coupling interface will be formed, which accelerates the charge migration at the interface.…”