钕和钐对溶胶-凝胶法制备的 TiO 粉末结构和性能的影响。
The Influence of Nd and Sm on the Structure and Properties of Sol-Gel-Derived TiO Powders.
机构信息
Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Acad. G. Bonchev str., bld. 11, 1113 Sofia, Bulgaria.
Institute of Metal Science, Equipment and Technologies "Acad. A. Balevski" with Center for Hydro- and Aerodynamics at the Bulgarian Academy of Sciences, 67 Shipchenski prohod str., 1574 Sofia, Bulgaria.
出版信息
Molecules. 2021 Jun 23;26(13):3824. doi: 10.3390/molecules26133824.
TiO nanopowders modified by Nd and Sm were prepared using the sol-gel technique. It was found by XRD analysis that the samples containing Sm are amorphous up to 300 °C, while those with Nd preserve a mixed organic-inorganic amorphous structure at higher temperatures (400 °C). The TiO (rutile) was not detected up to 700 °C in the presence of both modified oxides. TiO (anatase) crystals found at about 400 °C in the Sm-modified sample exhibited an average crystallite size of about 25-30 nm, while doping with Nd resulted in particles of a lower size-5-10 nm. It was established by DTA that organic decomposition is accompanied by significant weight loss occurring in the temperature range 240-350 °C. Photocatalytic tests showed that the samples heated at 500 °C possess photocatalytic activity under UV irradiation toward Malachite green organic dye. Selected compositions exhibited good antimicrobial activity against K12 and .
采用溶胶-凝胶法制备了 Nd 和 Sm 改性的 TiO 纳米粉末。XRD 分析发现，含 Sm 的样品在 300°C 以下为非晶态，而含 Nd 的样品在较高温度（400°C）下保持混合有机-无机非晶态结构。在两种改性氧化物存在的情况下，TiO（金红石）在 700°C 以下均未检测到。在 Sm 改性样品中，约 400°C 时发现的 TiO（锐钛矿）晶体的平均晶粒尺寸约为 25-30nm，而掺杂 Nd 则导致粒径较小-5-10nm。DTA 表明，有机分解伴随着在 240-350°C 温度范围内发生的显著重量损失。光催化测试表明，在 500°C 加热的样品在紫外光照射下对孔雀石绿有机染料具有光催化活性。选择的成分对 K12 和 表现出良好的抗菌活性。
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