Multicolor luminescent material based on interaction between TiNbO5- nanosheets and lanthanide ions for visualization of pH change in inorganic gel electrolyte
Multicolor luminescent material based on interaction between TiNbO5- nanosheets and lanthanide ions for visualization of pH change in inorganic gel electrolyte
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DOI：
10.1039/d2nr03806d
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发表时间：
2022-10-31
期刊：
影响因子：
6.7
通讯作者：
Ida, Shintaro
中科院分区：
文献类型：
--
作者：
Awaya, Keisuke;Iso, Kei-ichiro;Ida, Shintaro
通过静电作用将Eu3+和Tb3+离子夹在阴离子TiNbO5-纳米片中，制备了发光随质子浓度(PH)变化剧烈的层状纳米片材料。每个三价稀土离子对pH变化的响应不同：Eu3+在低质子浓度(pH：13)时表现出强烈的红光，而Tb3+在高质子浓度(pH：1)时以绿色发光为主。光致发光强度取决于TiNbO5-纳米片的光催化活性和从主体层到客体稀土离子的能量传递之间的平衡。此外，三价稀土/TiNbO5-纳米片状杂化材料在水溶液中形成凝胶状固体，与Na2SO4混合时起到无机凝胶电解质的作用。镧系元素/TiNbO5-纳米薄片杂化的多色发光(红-黄-绿)使人们能够直接看到质子在无机凝胶电解液中的扩散过程。
Layered nanosheet materials showing a drastic luminescence change in response to changes in proton concentration (pH) were prepared by sandwiching Eu3+ and Tb3+ cations with anionic TiNbO5- nanosheets using electrostatic interaction. Each trivalent lanthanide ion showed a different response to pH change: a strong red emission from Eu3+ was observed at low proton concentrations (pH: 13) and a green emission from Tb3+ was dominant at high proton concentrations (pH: 1). The photoluminescence intensity was determined by the balance between the photocatalytic activity of TiNbO5- nanosheets and energy transfer from the host layer to the guest lanthanide ions. Moreover, the trivalent lanthanide/TiNbO5- nanosheet hybrid formed a gel-like solid in aqueous solution, which functioned as an inorganic gel electrolyte when mixed with Na2SO4. The multicolor luminescence (red-yellow-green) of the lanthanide/TiNbO5- nanosheet hybrid enabled direct visualization of the diffusion of protons in an inorganic gel electrolyte during water electrolysis.