Construction of CeO₂/PbFe₁₂O₁₉ Heterojunction Photocatalysts and their Preference for the Photodegradation of −C=O and −CONH₂

Abstract

Preparation of CeO2/PbFe12O19 (CO/PFO) heterojunction photocatalysts with the different CO contents as visible‐light photocatalysts were synthesized by a polyacrylamide gel route combined with a low temperature sintering technique. A variety of characterization techniques have been used to confirm that the CO/PFO heterojunction photocatalysts contain only Ce, Pb, Fe and O elements, which also indicates that the special interfacial contact between CO and PFO is formed and there are a large number of oxygen vacancies and interfacial defects in CO/PFO heterojunction photocatalysts. The coupling of CO and PFO enhances the optical absorption coefficients of CO and PFO and slightly decreases the optical band gap (Eg) of the host lattice (PFO). Rhodamine B (RhB), phenol, bisphenol A (BPA) and oxytetracycline hydrochloride (OTC‐HCl) were used as target degradation pollutants to investigate the degradation preference of CO/PFO heterojunction photocatalysts. The degradation percentages of the RhB, Phenol, BPA and OTC‐HCl are 20.35 %, 38.77 %, 18.11 % and 75.32 %, respectively. The results showed that the hydroxyl radical played a dominant role in the degradation of pollutants by the CO/PFO heterojunction photocatalysts and preferred to degrade −C=O and −CONH2. This new idea will provide technical support for cutting functional groups of pollutants purposefully.

Enhanced Photocatalytic Activity of O‐deficient Modified CuAl2O4/MoS2 Composite Photocatalysts in Wastewater Treatment Applications

“…At present, the methods of constructing binary heterojunction photocatalysts mainly include one-step method, two-step method, and three-step method. [30][31][32][33] The results show that the photocatalytic activity of binary heterojunction photocatalysts synthesized by the two-step synthesis method is higher than that of one-step synthesis method. [30] In the above method, the threestep method of synthesizing two single-component photocatalysts by the polyacrylamide gel method, and then obtaining binary heterojunction photocatalysts by low-temperature treatment shows its unique charm in improving the photocatalytic activity of single-component photocatalysts.…”

“…[30] In the above method, the threestep method of synthesizing two single-component photocatalysts by the polyacrylamide gel method, and then obtaining binary heterojunction photocatalysts by low-temperature treatment shows its unique charm in improving the photocatalytic activity of single-component photocatalysts. [32][33][34] Therefore, it is pioneering to construct the O-deficient modified CuAl 2 O 4 /MoS 2 composite photocatalysts by a wet chemical route combined with the low-temperature treatment and explore its photocatalytic activity.…”

Intelligent Algorithms Enable Photocatalyst Design and Performance Prediction

“…According to Refs. [1][2][3][4], rapid economic development has a negative impact on the global environment, resulting in countries around the world investing a lot of labor and material resources in designing new catalysts to reduce environmental pollution [5][6][7][8][9][10][11]. In the early stage of the development of photocatalysts, it is only through constantly preparing different catalysts and conducting photocatalytic experiments that effective photocatalysts can be found [12,13].…”