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Pr掺杂Bi2MoO6/TiO2复合纳米纤维的制备及可见光催化性能 被引量:5
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作者 李跃军 曹铁平 +2 位作者 梅泽民 席啸天 王霞 《高等学校化学学报》 SCIE EI CAS CSCD 北大核心 2017年第12期2313-2319,共7页
以电纺TiO_2纳米纤维为基质,采用溶剂热法制备了稀土Pr掺杂Bi_2MoO_6/TiO_2复合纳米纤维,利用X射线衍射仪、扫描电子显微镜、透射电子显微镜、紫外-可见-近红外分光光度计和荧光光谱仪等对不同样品的物相、形貌和光学性能等进行表征,以... 以电纺TiO_2纳米纤维为基质,采用溶剂热法制备了稀土Pr掺杂Bi_2MoO_6/TiO_2复合纳米纤维,利用X射线衍射仪、扫描电子显微镜、透射电子显微镜、紫外-可见-近红外分光光度计和荧光光谱仪等对不同样品的物相、形貌和光学性能等进行表征,以甲基橙为模拟有机污染物,考察了样品的光催化性能.结果表明,在复合样品中,Pr^(3+)进入Bi_2MoO_6晶格,部分取代Bi^(3+)形成施主能级,导致能级带隙变窄,不仅有利于提高样品的可见光催化活性,抑制光生电子-空穴对复合,而且还提高了Bi_2MoO_6/TiO_2的光催化活性和稳定性.当Pr的掺杂量为3%(摩尔分数)时,光催化降解甲基橙的效果最佳,可见光照射180 min时降解率达到93.8%,比纯Bi_2MoO_6/TiO_2的降解率有明显提高. 展开更多
关键词 静电纺丝 Pr掺杂 bi2moo6 tio2 可见光催化
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Novel Bi2MoO6 Nanosheets/Vertical TiO2 Nanorods Arrays Heterojunction with Enhanced Photoelectrochemical Performance under Visible Light Irradiation
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作者 高翔 薛佳伟 +4 位作者 罗英 朱晓娣 孙松 鲍骏 汪文栋 《Chinese Journal of Chemical Physics》 SCIE CAS CSCD 2017年第5期576-580,I0002,共6页
Novel Bi2MoO6/TiO2 heterojunction was fabricated by growing Bi2MoO6 nanosheets arrays on the vertically aligned TiO2 nanorods arrays via a two-step solvothermal method. The obtained Bi2MoO6/TiO2 hierarchical heterojun... Novel Bi2MoO6/TiO2 heterojunction was fabricated by growing Bi2MoO6 nanosheets arrays on the vertically aligned TiO2 nanorods arrays via a two-step solvothermal method. The obtained Bi2MoO6/TiO2 hierarchical heterojunction showed excellent visible light photoelectrochemical performance. Compared with the pure TiO2 and Bi2MoO6, the photocurrent density of the heterojunction was increased 57 and 29 times, respectively. Furthermore, the hydrogen generation rate of the Bi2MoO6/TiO2 for photoelectrocatalytic water-splitting was about 6 times higher than that of the pure Bi2MoO6. The improved performance can be attributed to the synergistic effects of enhanced absorption of visible light, increase of migration rate and separation efficiency of photo-induced carriers. 展开更多
关键词 bi2moo6/tio2 Hierarchical structure Photoelectrocatalytic water-splitting Visible light
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