Abstract The porous Eu(TTA)3(TPPO)2/SnO2 (ETTS, TTA: 2-thenoyltrifluoroacetonate and TPPO: triphenylphosphine oxide) composite was prepared via sol-gel method with tetraethyl orthosilicate (TEOS) as catalyst which showed the cumulate litchi shell-like structure. The Eu(TTA)3(TPPO)2 organic complexes (ETT) could be absolutely distributed into the pores of the SnO2 matrix at the molecular level through sol-gel process. SiO2 was used as the hard template which was removed to increase porosity during the prepared process. The red emission of ETTS was exhibited under the 368 nm excitation light, and much better luminescence properties was shown after washing off SiO2 (ETTS-W) which was about 4 times of unwashed ETTS (ETTS-UW) and 15.6 times of ETT for 615 nm emission when Eu content was 6 wt%. The excellent luminescence property of ETTS-W samples was mainly attributed to the organic ligands, the pore structure after removing SiO2 and stronger ultraviolet absorption capacity of SnO2 matrix.

中文翻译：

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具有较强红光发射的累积荔枝壳状结构多孔Eu(TTA)3(TPPO)2/SnO2材料的制备

摘要 以原硅酸四乙酯 (TEOS) 为催化剂，采用溶胶-凝胶法制备了多孔 Eu(TTA)3(TPPO)2/SnO2（ETTS，TTA：2-苯甲酰三氟丙酮和 TPPO：三苯基氧化膦）复合材料，该复合材料具有堆积荔枝壳。 - 结构。Eu(TTA)3(TPPO)2有机配合物(ETT)可以通过溶胶-凝胶过程在分子水平上绝对分布到SnO2基体的孔隙中。SiO2 用作硬模板，在制备过程中将其去除以增加孔隙率。ETTS 在 368 nm 激发光下发射红光，洗去 SiO2 (ETTS-W) 后显示出更好的发光性能，约为未洗 ETTS (ETTS-UW) 的 4 倍，615 是 ETT 的 15.6 倍。当 Eu 含量为 6 wt% 时，nm 发射。