Study on Preparation of Ce~(3+)-Doped LaAlO₃ Powder by Solution Combustion Method and Its Fluorescence Properties AITranslate

4万滴,田冬.Ni掺杂Sm_(x)Sr_(1-x)Fe_(y)Co_(1-y)O_(3-δ)阴极材料的制备与表征[J].河南化工,2024,41(3):7-9.

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Chinese Library Classification Number:TQ422[化学工程]

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Using La(NO₃)₃·6H₂O,Al(NO₃)₃·9H₂O,and Ce(NO₃)₃·6H_2O as the raw materials and C₂H_5NO_(2 ) as a reducing agent,La_1-xCe_xAlO₃(x=0.01,0.02,0.03,0.04,0.05) samples were synthesized by solution combustion method and analyzed by XRD,SEM,UV-Vis DRS,XPS,and XRF.The results show that compared with LaAlO₃ prepared at other temperatures or with different Ce doping amount,La_0.97Ce_0.03AlO₃ prepared at 825 ℃ for 4 h possesses more prominent and distinct XRD characteristic peaks.And the sample exhibits dispersed particles,and a clear contour,with a particle size of 21.59 nm.The absorption of the sample also becomes stronger in the ultraviolet-visible region with a band gap width of 4.86 eV.Ce³⁺ ions have occupied part of the positions of La³⁺ in the LaAlO₃ lattice,with an optimal Ce³⁺ doping concentration of 0.03.Its strongest characteristic peak of the emission spectrum appears at 525 nm,emitting yellow-green light.