Construction of CeO2/PbFe12O19 Heterojunction Photocatalysts and their Preference for the Photodegradation of −C=O and −CONH2
Construction of CeO2/PbFe12O19 Heterojunction Photocatalysts and their Preference for the Photodegradation of −C=O and −CONH2
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DOI：
10.1002/slct.202204779
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发表时间：
2023-09
期刊：
影响因子：
2.1
通讯作者：
Xiangyu Chen;Shifa Wang;Yujia Jin;Mengjun Han;Maoyuan Li;Huajing Gao;Han Yang;Leiming Fang;Jagadeesha V. Angadi;A. F. Abd El-Rehim;Atif Mossad Ali;Dengfeng Li
中科院分区：
文献类型：
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作者：
Xiangyu Chen;Shifa Wang;Yujia Jin;Mengjun Han;Maoyuan Li;Huajing Gao;Han Yang;Leiming Fang;Jagadeesha V. Angadi;A. F. Abd El-Rehim;Atif Mossad Ali;Dengfeng Li
采用聚丙烯酰胺凝胶法结合低温烧结技术制备了不同CO含量的CeO 2/PbFe 12 O 19（CO/PFO）异质结可见光催化剂。采用多种表征技术证实了CO/PFO异质结光催化剂中只含有Ce、Pb、Fe和O元素，这也表明CO与PFO之间形成了特殊的界面接触，CO/PFO异质结光催化剂中存在大量的氧空位和界面缺陷。CO和PFO的耦合增强了CO和PFO的光吸收系数，并略微降低了基质晶格（PFO）的光学带隙（Eg）。以罗丹明B（RhB）、苯酚、双酚A（BPA）和盐酸土霉素（OTC-HCl）为目标降解物，考察了CO/PFO异质结光催化剂的降解偏好性. RhB、苯酚、BPA和OTC‐HCl的降解百分比分别为20.35%、38.77%、18.11%和75.32%。结果表明，羟基自由基在CO/PFO异质结光催化剂降解污染物中起主导作用，优先降解−C=O和− CONH 2.这一新的思路将为有目的地削减污染物的功能基团提供技术支持。
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.