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Ln(Ln=Y/Gd)VO_4:Er^(3+)/Nd^(3+)的制备及发光性能 被引量:5
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作者 张文文 孟建新 +1 位作者 刘应亮 谢国伟 《中国稀土学报》 CAS CSCD 北大核心 2007年第4期402-405,共4页
采用高温固相法制备了Ln(Ln=Y,Gd)VO4掺Er3+或Nd3+的近红外发光材料。通过X射线粉末衍射(XRD)和光致发光(PL)对样品进行了表征。结果表明:所得产品结晶良好,属于四方晶系,锆石结构。研究了Er3+,Nd3+的含量、煅烧时间、煅烧温度等对材料... 采用高温固相法制备了Ln(Ln=Y,Gd)VO4掺Er3+或Nd3+的近红外发光材料。通过X射线粉末衍射(XRD)和光致发光(PL)对样品进行了表征。结果表明:所得产品结晶良好,属于四方晶系,锆石结构。研究了Er3+,Nd3+的含量、煅烧时间、煅烧温度等对材料近红外发光性质的影响。在Ln(Ln=Y/Gd)VO4:Er3+/Nd3+中,存在明显的从VO43-向Er3+/Nd3+的能量传递。两种不同的LnVO4(Ln=Y/Gd)基质对发光性质也有一定的影响。小浓度Bi3+的掺入可以明显提高YVO4:Er3+/Nd3+的近红外发光强度。 展开更多
关键词 lnvo4 ER^3+ Nd^3+近红外发光 能量传递 稀土
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纳米发光材料LnVO_4:Eu(Ln=La,Gd,Y)的光谱研究 被引量:20
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作者 张洪武 付晓燕 +3 位作者 牛淑云 韩燕 孙公权 辛勤 《光谱学与光谱分析》 SCIE EI CAS CSCD 北大核心 2004年第10期1164-1167,共4页
采用络合溶胶 凝胶法制备了系列纳米发光材料LnVO4:Eu(Ln =La ,Gd ,Y) ,并采用X射线衍射(XRD)、红外光谱 (FTIR)、荧光光谱以及紫外 可见光谱 (UV Vis)对三种发光材料的结构以及发光性质进行研究。结果表明 :YVO4与GdVO4具有相同的结构 ... 采用络合溶胶 凝胶法制备了系列纳米发光材料LnVO4:Eu(Ln =La ,Gd ,Y) ,并采用X射线衍射(XRD)、红外光谱 (FTIR)、荧光光谱以及紫外 可见光谱 (UV Vis)对三种发光材料的结构以及发光性质进行研究。结果表明 :YVO4与GdVO4具有相同的结构 ,均属于四方晶系 ,二者具有相似的光谱性质 ;而LaVO4属于单斜晶系 ,受对称性的影响其光谱也相应的发生了变化 ,红外光谱和发射光谱的特征峰发生明显的宽化 。 展开更多
关键词 纳米发光材料 掺铕稀土钒酸盐 络合溶胶-凝胶法 红外光谱 荧光光谱 紫外-可见光谱
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LnVO_(4)(Ln=La,Ce,Pr,Nd,etc.)-based photocatalysts:Synthesis,design,and applications
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作者 Liquan Jing Yuanguo Xu +9 位作者 Meng Xie Chongchong Wu Heng Zhao Jiu Wang Hui Wang Yubo Yan Na Zhong Huaming Li Ian D.Gates Jinguang Hu 《Journal of Materials Science & Technology》 SCIE EI CAS CSCD 2024年第10期10-43,共34页
LnVO_(4)(Ln=La,Ce,Pr,Nd,etc.)is an emerging photocatalyst for solving the energy and environmental crisis,due to its suitable band gap,special valence electronic structure,high thermal,and chemical sta-bility,as well ... LnVO_(4)(Ln=La,Ce,Pr,Nd,etc.)is an emerging photocatalyst for solving the energy and environmental crisis,due to its suitable band gap,special valence electronic structure,high thermal,and chemical sta-bility,as well as excellent photocatalytic performance.Although exhibiting great promise,the low solar power employment efficiency of LnVO_(4) materials has limited its further development and application.However,recent breakthroughs have been made in both heightening its photocatalysis efficiency and elu-cidating the essential photocatalytic mechanisms.Therefore,it is important to review and summarize recent research progress on LnVO_(4) nanomaterials and their applications.In this review,we systemat-ically report on and examine recent computational and experimental advances in the modification of LnVO_(4)-based photocatalysts through morphology adjustment,elemental doping,phase structure modula-tion,crystal facet modulation,defect modulation,heterostructure,and beyond.Thereafter,we outline cur-rent promising photocatalytic applications and discuss challenges/expected upcoming research aims for LnVO_(4)-based photocatalysts.Our goal is to furnish guidance for the reasonable design and preparation of highly efficient LnVO_(4)(Ln=La,Ce,Pr,Nd,etc.)-based photocatalytic materials for sundry applications. 展开更多
关键词 lnvo_(4)(Ln=La Ce Pr Nd etc.) Photocatalysis SYNTHESIS Design Applications
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