TiO2纳米粒子的物理化学和热释光表征

IF 3.3 3区物理与天体物理 Q2 OPTICS

Journal of Luminescence Pub Date : 2025-04-30 DOI:10.1016/j.jlumin.2025.121280

Manar Mostafa , Ghada Bassioni , Nabil El-Faramawy , Mohamed El-Kinawy

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引用次数: 0

摘要

本研究考察了溶胶-凝胶法制备的TiO2纳米颗粒的结构、光学和热释光特性。利用x射线衍射（XRD）、能量色散x射线能谱（EDX）、红外光谱（FTIR）和透射电镜（TEM）等表征技术，对制备的纳米颗粒的物理和化学性质进行了全面探测。利用红外热释光仪测量了纳米颗粒的发光曲线，研究了其热释光特性。合成的TiO2由锐钛矿和金红石相组成，但以金红石相为主。合成的TiO2的TL发光曲线表明存在许多高度重叠的峰。辉光曲线的反褶积显示了六个峰的存在。在5.5 ~ 385 Gy范围内，纳米粒子的TL响应与剂量呈线性关系。制备的样品可可靠测量的最小检测剂量为2.3 Gy。制备的样品对β辐射的敏感性，从110 Gy剂量开始稳定。TiOs所表现出的剂量学特性表明，它是一种很有前途的高剂量测量剂量计。

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Physicochemical and thermoluminescence characterizations of TiO2 nanoparticles

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Physicochemical and thermoluminescence characterizations of TiO2 nanoparticles

This study investigates the structural, optical, and thermoluminescence (TL) properties of TiO₂ nanoparticles synthesized via the sol-gel method. Characterization techniques, such as X-Ray Diffraction (XRD), Energy Dispersive X-ray spectroscopy (EDX), FTIR, and TEM, were used to fully probe the physical and chemical properties of the prepared nanoparticles. The thermoluminescence characteristics of the nanoparticles were also investigated using glow curves measured with a TL reader. The synthesized TiO2 is a composition of anatase and rutile phases but is dominated by the rutile phase. The TL glow curve of the synthesized TiO2 indicated the presence of many highly overlapping peaks. Deconvolution of the glow curve revealed the presence of six peaks. A linear relationship exists between TL response of the nanoparticles and dose within 5.5–385 Gy. The minimum detectable dose that the prepared samples can measure reliably was found to be 2.3 Gy. The sensitivity of the prepared samples to beta radiation, was found to be stable starting from the dose of 110 Gy. The dosimetric properties exhibited by TiOs demonstrated that it is a promising dosimeter for high-dose measurements.

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来源期刊

Journal of Luminescence 物理-光学

CiteScore

6.70

自引率

13.90%

发文量

850

审稿时长

3.8 months

期刊介绍： The purpose of the Journal of Luminescence is to provide a means of communication between scientists in different disciplines who share a common interest in the electronic excited states of molecular, ionic and covalent systems, whether crystalline, amorphous, or liquid. We invite original papers and reviews on such subjects as: exciton and polariton dynamics, dynamics of localized excited states, energy and charge transport in ordered and disordered systems, radiative and non-radiative recombination, relaxation processes, vibronic interactions in electronic excited states, photochemistry in condensed systems, excited state resonance, double resonance, spin dynamics, selective excitation spectroscopy, hole burning, coherent processes in excited states, (e.g. coherent optical transients, photon echoes, transient gratings), multiphoton processes, optical bistability, photochromism, and new techniques for the study of excited states. This list is not intended to be exhaustive. Papers in the traditional areas of optical spectroscopy (absorption, MCD, luminescence, Raman scattering) are welcome. Papers on applications (phosphors, scintillators, electro- and cathodo-luminescence, radiography, bioimaging, solar energy, energy conversion, etc.) are also welcome if they present results of scientific, rather than only technological interest. However, papers containing purely theoretical results, not related to phenomena in the excited states, as well as papers using luminescence spectroscopy to perform routine analytical chemistry or biochemistry procedures, are outside the scope of the journal. Some exceptions will be possible at the discretion of the editors.