(Ho, Yb) co-doping effects on structural, optical, photocatalytic and thermal properties of TiO2 NPs prepared by hydrothermal approach

IF 2.8 3区物理与天体物理 Q2 PHYSICS, CONDENSED MATTER Physica B-condensed Matter Pub Date : 2025-03-11 DOI:10.1016/j.physb.2025.417132

Poonam Nain , Manjeet Pawar , Saruchi Rani , Sushil Kumar , M.A. Majeed Khan

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Abstract

TiO₂ nanoparticles with lanthanide dopant's concentration Ho (1 %) and Yb (1, 3 %) were successfully produced by hydrothermal method utilizing titanium isopropoxide, holmium nitrate pentahydrate and ytterbium nitrate pentahydrate as precursors. Produced nanoparticles were analyzed using structural (XRD, FTIR), microstructural (FESEM, EDX), optical (UV–visible, PL), photocatalytic and thermal (TGA, DTG) characterization tools. XRD indicated that TiO₂ and (Ho, Yb) co-doped TiO₂ nanoparticles have anatase phase. The crystallite size, micro-strain, lattice constant and dislocation density were calculated through XRD data. Optical studies revealed bandgap, urbach energy, refractive index, extinction coefficient, optical conductivity and PL emission wavelength. Photocatalytic activity predicted the photodegradation of Rhodamine Band Malachite Green dyes as examined through visible light absorption, and indicated that degradation rate of photocatalyst enhances as (Ho, Yb) doping concentration increases in TiO₂ NPs. Thermal analysis was carried out to estimate weight loss during different phases, and parameters such as activation energy, entropy, enthalpy and Gibb's free energy.

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（Ho, Yb）共掺杂对水热法制备TiO2 NPs结构、光学、光催化和热性能的影响

以异丙醇钛、五水硝酸钬和五水硝酸镱为前驱体，采用水热法制备了镧系掺杂物浓度为Ho（1%）和Yb（1,3%）的TiO2纳米粒子。利用结构（XRD， FTIR），微观结构（FESEM， EDX），光学（uv -可见，PL），光催化和热（TGA， DTG）表征工具对制备的纳米颗粒进行了分析。XRD分析表明，TiO2与（Ho, Yb）共掺杂TiO2纳米颗粒具有锐钛矿相。通过XRD数据计算了晶体尺寸、微应变、晶格常数和位错密度。光学研究揭示了带隙、厄巴赫能、折射率、消光系数、光导率和发光波长。光催化活性通过可见光吸收检测预测了罗丹明带孔雀石绿染料的光降解，并表明随着TiO2 NPs中（Ho, Yb）掺杂浓度的增加，光催化剂的降解率提高。通过热分析估算了不同阶段的失重，以及活化能、熵、焓和吉布自由能等参数。

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来源期刊

Physica B-condensed Matter 物理-物理：凝聚态物理

CiteScore

4.90

自引率

7.10%

发文量

703

审稿时长

44 days

期刊介绍： Physica B: Condensed Matter comprises all condensed matter and material physics that involve theoretical, computational and experimental work. Papers should contain further developments and a proper discussion on the physics of experimental or theoretical results in one of the following areas: -Magnetism -Materials physics -Nanostructures and nanomaterials -Optics and optical materials -Quantum materials -Semiconductors -Strongly correlated systems -Superconductivity -Surfaces and interfaces