戊二醛修飾上轉換發光材料NaY0.57Yb0.39Er0.04F4的制備與表征

戊二醛修飾上轉換發光材料NaY_0.57Yb_0.39Er_0.04F₄的制備與表征

摘要: 利用表面接枝改性法,用戊二醛作修飾劑,對上轉換發光材料NaY_0.57Yb_0.39Er_0.04F₄進行了表面醛基修飾.傅里葉紅外吸收光譜證明了醛基的存在,紫外分光光度法定量檢測修飾醛基的含量為1.38×10^-3mol·g^-1,熱分析定性地證明了材料表面有機官能團的存在,掃描電鏡顯示了修飾后上轉換無機發光材料顆粒的直徑有所增加.沉降實驗表明,修飾醛基后的上轉換發光材料在水溶液中的分散穩定性得到了提高.

Abstract: With glutaraldehyde as finishing agent, the surface of an up-conversion luminescent material, NaY_0.57Yb_0.39Er_0.04 F₄, was modified with aldehyde groups by surface grafting modification. FI-IR proved that aldehyde groups existed on the surface. The quantity of aldehyde groups was 1.38 ×10³ mol·g^-1 which was detected by UV. Qualitative TGA indicated that there were organic groups on the surface. The particle diameter of the modified up-conversion luminescent material was aggrandized in SEM. In settlement testing, the modified up-conversion luminescent material has more favorable dispersion stability than un-modified materials.