Enhanced Photocatalytic Activity in Bi1-xBaxFeO3 Prepared by a PEG400 Assisted Sol–Gel Method
Enhanced Photocatalytic Activity in Bi1-xBaxFeO3 Prepared by a PEG400 Assisted Sol–Gel Method
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DOI：
10.1007/s11664-018-6208-7
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发表时间：
2018-03
影响因子：
2.1
通讯作者：
Chenlan Zhang;Jianguo Chen;D. Jin;Jinrong Cheng
中科院分区：
文献类型：
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作者：
Chenlan Zhang;Jianguo Chen;D. Jin;Jinrong Cheng
采用聚乙二醇400辅助的溶胶-凝胶法合成了x= 0、0.0 1、0.0 3、0.0 5和0.10的铁电Bi1-xBaxFeO3纳米粒子。X-射线衍射分析表明，Bi1-xBaxFeO_3纳米粒子具有扭曲的三方晶系结构，空间群为R3c，掺入Ba后衍射峰发生移动。透射电子显微镜分析表明，Bi1-xBaxFeO_3纳米粒子的粒径在30~60 nm之间，随着Ba2+含量的增加而减小。BI1-xBaxFeO_3纳米粒子的带隙在1.68-2.0 eV之间，能够对可见光辐射做出响应。可见光照射3h后，Bi1-xBaxFeO_3纳米粒子对甲基橙(MO)染料的光催化降解率达到81%左右，高于纯BiFeO_3( )的66%。此外，还研究和讨论了Ba2+掺杂对BFO微晶带隙的影响。
Ferroelectric Bi1-xBaxFeO3nanoparticles forx= 0, 0.01, 0.03, 0.05 and 0.10 were synthesized by a polyethylene glycol 400 (PEG400) assisted sol–gel method. X-ray diffraction reveals that Bi1-xBaxFeO3nanoparticles exhibit a distorted rhombohedral structure with the R3c space group, and the diffraction peaks shift upon incorporation of Ba. Transmission electron microscope analysis shows that the particle size of Bi1-xBaxFeO3nanoparticles is in the range of 30–60 nm, decreasing with an increase in Ba content. Bi1-xBaxFeO3nanoparticles have band gaps in the range of 1.68–2.0 eV, which are capable of responding to visible light irradiation. The rate of the photocatalytic degradation of Bi1-xBaxFeO3nanoparticles forx= 0.03 to methyl orange (MO) dye achieves about 81% under visible light irradiation for 3 h, which is higher than that of 66% for pure phase BiFeO3(BFO). Moreover, the effects of Ba2+modification on the band gap of BFO crystallites have been investigated and discussed.