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Eu3+ doped Bi2MoO6 nanosheets fabricated via hydrothermal-calcination route and their superior performance for aqueous volatile phenols removal
Journal of the Taiwan Institute of Chemical Engineers ( IF 5.7 ) Pub Date : 2021-07-14 , DOI: 10.1016/j.jtice.2021.06.038
Xingqiang Liu 1 , Wanqin Zhou 2 , Fang Li 2 , Changlin Yu 2
Affiliation  

(1) Background The discharge of volatile phenols, e.g., phenol, 2-methyl phenol, 3-methyl phenol, and 4-methyl phenol, into the aquatic system represents a main source of environmental contamination due to their high toxicity. Detoxication of phenol molecules from polluted water through photocatalytic degradation process is reported to be a mild and effective technology. (2) Methods In this study, to effectively remove these aqueous volatile phenols, a powerful photocatalyst, namely Eu3+doped Bi2MoO6 nanosheets, was prepared via a hydrothermal-calcination process. The novel Eu3+doped Bi2MoO6 nanosheets were characterized by XRD, BET, SEM, TEM, XPS, UV–vis DRS, FT-IR, PL and photoelectricity test. Under xenon lamp light illumination, Eu/Bi2MoO6 was used to degrade the volatile phenols. (3) Significant findings The results showed that the doping of Eu3+ into Bi2MoO6 crystals induced a distortion of Bi2MoO6 lattice and a decrease in crystalline grain size. Eu3+ doping also reduced the energy gap of Bi2MoO6 and increased its UV–Vis light absorption. Moreover, the doped Eu3+could act as electron traps to decrease the recombination rate of the e/h+ pairs. The doping of Eu3+ with optimum content (ཞ2% molar ratio of Eu3+ to Bi3+) gave a rise two times increase in activity for phenols decomposition.



中文翻译:

Eu3+ 掺杂 Bi2MoO6 纳米片水热煅烧法制备及其对水性挥发性酚类去除的优异性能

(1)背景挥发性酚类,如苯酚、2-甲基苯酚、3-甲基苯酚和4-甲基苯酚,排放到水生系统中,由于它们的高毒性,是环境污染的主要来源。据报道,通过光催化降解过程将污染水中的苯酚分子解毒是一种温和而有效的技术。(2)方法在本研究中,为了有效去除这些水性挥发性酚,通过水热煅烧工艺制备了一种强大的光催化剂,即 Eu 3+掺杂的 Bi 2 MoO 6纳米片。新型Eu 3+掺杂Bi 2 MoO 6通过XRD、BET、SEM、TEM、XPS、UV-vis DRS、FT-IR、PL和光电测试对纳米片进行表征。在氙灯照明下,Eu/Bi 2 MoO 6用于降解挥发性酚类。(3)重要发现结果表明,Eu 3+掺杂到Bi 2 MoO 6晶体中导致Bi 2 MoO 6晶格畸变和晶粒尺寸减小。Eu 3+掺杂还降低了Bi 2 MoO 6的能隙并增加了其紫外-可见光吸收。此外,掺杂的 Eu 3+可以充当电子陷阱以降低e - / h +对的复合率。Eu 3+以最佳含量(Eu 3+与Bi 3+ 的摩尔比≤2%)掺杂使苯酚分解的活性增加了两倍。

更新日期:2021-08-03
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