Facile one-pot synthesis of porous Ln2Ti2O7 (Ln = Nd, Gd, Er) with photocatalytic degradation performance for methyl orange
Facile one-pot synthesis of porous Ln2Ti2O7 (Ln = Nd, Gd, Er) with photocatalytic degradation performance for methyl orange
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DOI：
10.1016/j.catcom.2014.03.017
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发表时间：
2014-06
影响因子：
3.7
通讯作者：
Hun Xue;Zhang Yiwen;Jing Xu;Xinping Liu;Qingrong Qian;Liren Xiao;Qinghua Chen
中科院分区：
文献类型：
--
作者：
Hun Xue;Zhang Yiwen;Jing Xu;Xinping Liu;Qingrong Qian;Liren Xiao;Qinghua Chen
以金属硝酸盐（Ln（NO3）3（Ln = Nd，Gd，Er），TiO（NO3）2）和甘氨酸为原料，采用自蔓延燃烧法制备了多孔纳米晶Ln2Ti2O7（Ln = Nd，Gd，Er）。以橙子（MO）的光催化降解为目标，研究了Ln2Ti2O7（Ln = Nd，Gd，Er）的光催化活性。结果表明，立方焦绿石结构的Ln2Ti2O7（Ln = Gd，Er）的光催化活性高于单斜钙钛矿结构的Nd2Ti2O7，其中Gd2Ti2O7的光催化活性最好。不同的光催化活性观察到的Ln_2Ti_2O_7（Ln = Nd，Gd，Er）可能与其不同的晶体结构和Ln 4f壳。
Porous nanocrystalline Ln2Ti2O7(Ln = Nd, Gd, Er) was prepared by a facile self-propagating combustion method using metal nitrates (Ln(NO3)3(Ln = Nd, Gd, Er), TiO(NO3)2) and glycine. The photocatalytic activity of Ln2Ti2O7(Ln = Nd, Gd, Er) was evaluated by the photocatalytic degradation of methyl orange (MO). The results showed that the photocatalytic activity of Ln2Ti2O7(Ln = Gd, Er) with cubic pyrochlore structure was higher than that of Nd2Ti2O7with monoclinic perovskite structure and Gd2Ti2O7showed the best photocatalytic activity. The different photocatalytic activities observed for Ln2Ti2O7(Ln = Nd, Gd, Er) could be related to its different crystal structures and Ln 4f shells.