Abstract MgAl2O4:M (M = Ti, Mn, Co, Ni) phosphors were successfully prepared by a modified polyacrylamide gel method. Calcination temperature and metal particle has significant effects on the phase transition, optical and color properties of Mg Al2O4: M phosphors. Ti, M n, Co and Ni metal particles introduced into the MgAl2O4 system can produce a variety of colours from white, grayish black, blue to turquoise blue. Mn, Co and Ni metal particles added into MgAl2O4 system can extend their light absorption to visible light range, while the Ti metal particles clad into the system did not improve significantly. Co metal particles appended into the MgAl2O4 system can cause fluorescence quenching of emission peak at 395 nm and enhancement of emission peak at 405 nm, while the Ti and Mn metal particles infused into the system can bring the enhancement of visible emission peak at 425 nm. The fluorescence quenching of the peak at 395 nm can be ascribed to the wavelength of Co metal particles matching the surface plasmon absorbance band of MgAl2O4:M phosphor. A reduction in emission intensity at 425 nm can be assigned to electron transfer from the conduction band (CB) of MgAl2O4 to the CB of metal particles causing non-radiative decay. GRAPHICAL ABSTRACT

中文翻译：

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MgAl2O4 的光学和光致发光特性：M（M = Ti、Mn、Co、Ni）磷光体：煅烧行为和光致发光机制

摘要 MgAl2O4：采用改性聚丙烯酰胺凝胶法成功制备了M(M=Ti,Mn,Co,Ni)荧光粉。煅烧温度和金属颗粒对 Mg Al2O4:M 荧光粉的相变、光学和颜色特性有显着影响。引入 MgAl2O4 系统的 Ti、Mn、Co 和 Ni 金属颗粒可以产生从白色、灰黑色、蓝色到蓝绿色的多种颜色。添加到MgAl2O4体系中的Mn、Co和Ni金属颗粒可以将它们的光吸收扩展到可见光范围，而包覆到体系中的Ti金属颗粒没有显着改善。添加到MgAl2O4体系中的Co金属颗粒可引起395nm发射峰的荧光猝灭和405nm发射峰的增强，而注入体系中的Ti和Mn金属颗粒可以带来425nm处可见发射峰的增强，395nm处的荧光猝灭可以归因于Co金属颗粒的波长与MgAl2O4的表面等离子体吸收带相匹配: M 磷。425 nm 处发射强度的降低可归因于电子从 MgAl2O4 的导带 (CB) 转移到金属颗粒的 CB，从而导致非辐射衰减。图形概要 425 nm 处发射强度的降低可归因于电子从 MgAl2O4 的导带 (CB) 转移到金属颗粒的 CB，从而导致非辐射衰减。图形概要 425 nm 处发射强度的降低可归因于电子从 MgAl2O4 的导带 (CB) 转移到金属颗粒的 CB，从而导致非辐射衰减。图形概要