Structural and optical tuning of HfO2 nanoparticles synthesized via Sterculia oblongata: role of extraction solvents and calcination temperature

IF 3.9 2区材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY

Vacuum Pub Date : 2025-09-04 DOI:10.1016/j.vacuum.2025.114718

Mike Rahayu , Rahma Demy Fitria Irbati , Vatra Reksa Ananda , Muh Risky Yusuf , Dewangga Oky Bagus Apriandanu , Aminah Umar , Yoki Yulizar

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引用次数: 0

Abstract

HfO₂ nanoparticles (NPs) were synthesized via Sterculia oblongata leaf extract (SOLE) at variable calcination temperatures (500 °C, 700 °C, and 900 °C) and different solvents of leaf extract, using water (SOLE-W), methanol (SOLE-M), and n-hexane (SOLE-Hx) to investigate the effect on the structural, morphological, size, and optical properties. HfO₂ NPs were successfully synthesized, confirmed by Fourier Transform Infrared Spectroscopy (FT-IR) characteristics Hf–O bond vibrations at 400–700 cm⁻¹. X-Ray Diffraction (XRD) analysis confirmed monoclinic HfO₂ (P2₁/c), while Ultraviolet–Visible Diffuse Reflectance Spectroscopy (UV–Vis DRS) analysis revealed an optical band gap of 5.37–5.63 eV. Field Emission Scanning Electron Microscopy (FE-SEM) displayed a spherical morphology, while High-Resolution Transmission Electron Microscopy (HR-TEM) images indicated distinct agglomeration with average size of HfO₂-Hx (66.8 ± 13.2 nm), HfO₂-M (16.2 ± 4.9 nm), and HfO₂-W (30.2 ± 5.1 nm). These findings highlight the significant role of solvent selection and calcination temperature in tailoring HfO₂ NPs properties. This study introduces green synthesis of HfO₂ NPs using plant extract, without the addition of a weak base and a capping agent.

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利用扁豆合成的二氧化氢纳米颗粒的结构和光学调谐：萃取溶剂和煅烧温度的作用

采用不同的煅烧温度（500℃、700℃和900℃）和不同的叶提取物溶剂，以水（SOLE- w）、甲醇（SOLE- m）和正己烷（SOLE- hx）为原料，合成了HfO2纳米颗粒（NPs），考察了其结构、形态、尺寸和光学性质的影响。通过傅里叶变换红外光谱（FT-IR）表征，在400-700 cm−1波段Hf-O键振动，成功合成了HfO2 NPs。x射线衍射（XRD）分析证实单斜斜HfO2 (P2₁/c)，而紫外-可见漫反射光谱（UV-Vis DRS）分析显示光学带隙为5.37-5.63 eV。场发射扫描电镜（FE-SEM）观察到HfO2-Hx（66.8±13.2 nm）、HfO2-M（16.2±4.9 nm）和HfO2-W（30.2±5.1 nm）的团聚，高分辨率透射电镜（HR-TEM）观察到明显的团聚。这些发现强调了溶剂选择和煅烧温度对HfO2 NPs性能的影响。本研究介绍了在不添加弱碱和封盖剂的情况下，利用植物提取物绿色合成HfO2 NPs的方法。

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来源期刊

Vacuum 工程技术-材料科学：综合

CiteScore

6.80

自引率

17.50%

发文量

审稿时长

34 days

期刊介绍： Vacuum is an international rapid publications journal with a focus on short communication. All papers are peer-reviewed, with the review process for short communication geared towards very fast turnaround times. The journal also published full research papers, thematic issues and selected papers from leading conferences. A report in Vacuum should represent a major advance in an area that involves a controlled environment at pressures of one atmosphere or below. The scope of the journal includes: 1. Vacuum; original developments in vacuum pumping and instrumentation, vacuum measurement, vacuum gas dynamics, gas-surface interactions, surface treatment for UHV applications and low outgassing, vacuum melting, sintering, and vacuum metrology. Technology and solutions for large-scale facilities (e.g., particle accelerators and fusion devices). New instrumentation ( e.g., detectors and electron microscopes). 2. Plasma science; advances in PVD, CVD, plasma-assisted CVD, ion sources, deposition processes and analysis. 3. Surface science; surface engineering, surface chemistry, surface analysis, crystal growth, ion-surface interactions and etching, nanometer-scale processing, surface modification. 4. Materials science; novel functional or structural materials. Metals, ceramics, and polymers. Experiments, simulations, and modelling for understanding structure-property relationships. Thin films and coatings. Nanostructures and ion implantation.