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通过对氢氧化镧进行退火来研究氧化镧的物理和电学性质。

Investigating the physical and electrical properties of LaO via annealing of La(OH).

作者信息

Ismail Walid, Belal Aya, Abdo Walied, El-Shaer Abdelhamid

机构信息

Physics Department, Faculty of Science, Kafrelsheikh University, Kafrelsheikh, 33516, Egypt.

Department of Pathology and Clinical Pathology, Faculty of Veterinary Medicine, Kafrelsheikh University, Kafr El-Sheikh, 33516, Egypt.

出版信息

Sci Rep. 2024 Apr 2;14(1):7716. doi: 10.1038/s41598-024-57848-8.

DOI:10.1038/s41598-024-57848-8
PMID:38565595
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC10987520/
Abstract

A simple technique was utilized to fabricate pure hexagonal LaO nanorods by utilizing lanthanum(III) nitrate hexahydrate (La(NO)·6HO) and ammonia (NHOH). The LaO nanoparticles were analyzed using XRD, TGA, Raman, SEM, FTIR, TEM, PL spectroscopy, and Mott-Schottky techniques. The XRD analysis confirmed the production of La(OH) nanorods under appropriate conditions, which were then successfully converted into LaOCO and finally into LaO nanorods through annealing. The TGA analysis showed that the total weight loss was due to water evaporation and the dissolution of minimal moisture present in the environment. The FTIR analysis confirmed the presence of functional groups. The SEM analysis revealed changes in morphology. The TEM analysis to determine the particle size. The PL findings showed three emission peaks at 390, 520, and 698 nm due to interband transitions and defects in the samples. The Mott-Schottky analysis demonstrated that the flatband potential and acceptor density varied with annealing temperature, ranging from 1 to 1.2 V and 2 × 10 to 1.4 × 10 cm, respectively. Annealing at 1000 °C resulted in the lowest resistance to charge transfer (Rct).

摘要

利用六水合硝酸镧（La(NO₃)₃·6H₂O）和氨水（NH₄OH），采用一种简单的技术制备了纯六方相的La₂O₃纳米棒。使用X射线衍射（XRD）、热重分析（TGA）、拉曼光谱、扫描电子显微镜（SEM）、傅里叶变换红外光谱（FTIR）、透射电子显微镜（TEM）、光致发光（PL）光谱和莫特-肖特基技术对La₂O₃纳米颗粒进行了分析。XRD分析证实了在适当条件下生成了La(OH)₃纳米棒，然后通过退火将其成功转化为La₂O₂CO₃，最终转化为La₂O₃纳米棒。TGA分析表明总重量损失是由于水蒸发和环境中存在的微量水分溶解所致。FTIR分析证实了官能团的存在。SEM分析揭示了形态变化。TEM分析用于确定粒径。PL结果显示，由于样品中的带间跃迁和缺陷，在390、520和698 nm处出现了三个发射峰。莫特-肖特基分析表明，平带电位和受主密度随退火温度而变化，分别在1至1.2 V和2×10¹⁷至1.4×10¹⁷ cm⁻³范围内。在1000℃退火导致电荷转移电阻（Rct）最低。

https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/8588268922a7/41598_2024_57848_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/4096ae07d17d/41598_2024_57848_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/f6d6d8c9f78a/41598_2024_57848_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/24fe3ce605dd/41598_2024_57848_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/1c4ad31bd709/41598_2024_57848_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/bbff52016e35/41598_2024_57848_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/87408eaa7dd2/41598_2024_57848_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/14493fd0a0c9/41598_2024_57848_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/b9b5ffdc3f5e/41598_2024_57848_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/0aeebd2f0665/41598_2024_57848_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/8588268922a7/41598_2024_57848_Fig10_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/4096ae07d17d/41598_2024_57848_Fig1_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/f6d6d8c9f78a/41598_2024_57848_Fig2_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/24fe3ce605dd/41598_2024_57848_Fig3_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/1c4ad31bd709/41598_2024_57848_Fig4_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/bbff52016e35/41598_2024_57848_Fig5_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/87408eaa7dd2/41598_2024_57848_Fig6_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/14493fd0a0c9/41598_2024_57848_Fig7_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/b9b5ffdc3f5e/41598_2024_57848_Fig8_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/0aeebd2f0665/41598_2024_57848_Fig9_HTML.jpg
https://cdn.ncbi.nlm.nih.gov/pmc/blobs/0384/10987520/8588268922a7/41598_2024_57848_Fig10_HTML.jpg

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本文引用的文献

[1]
Highly selective CO sensing response of lanthanum oxide nanoparticle electrodes at ambient temperature.

Nanoscale Adv. 2023-6-7

[2]
Advancement of Physical and Photoelectrochemical Properties of Nanostructured CdS Thin Films toward Optoelectronic Applications.

Nanomaterials (Basel). 2023-5-30

[3]
Enhancement of Structural, Optical and Photoelectrochemical Properties of n-CuO Thin Films with K Ions Doping toward Biosensor and Solar Cell Applications.

Nanomaterials (Basel). 2023-4-4

[4]
Progress and Recent Strategies in the Synthesis and Catalytic Applications of Perovskites Based on Lanthanum and Aluminum.

Materials (Basel). 2022-5-4

[5]
Correction: Green synthesis of 1,4-benzodiazepines over LaO and La(OH) catalysts: possibility of Langmuir-Hinshelwood adsorption.

RSC Adv. 2018-1-29

[6]
Biological applications of green synthesized lanthanum oxide nanoparticles via Couroupita guianensis abul leaves extract.

Anal Biochem. 2022-2-1

[7]
Hexagonal and Monoclinic Phases of LaOCO Nanoparticles and Their Phase-Related CO Behavior.

Nanomaterials (Basel). 2020-10-19

[8]
Role of Surface Oxygen Vacancies and Lanthanide Contraction Phenomenon of Ln(OH) (Ln = La, Pr, and Nd) in Sulfide-Mediated Photoelectrochemical Water Splitting.

ACS Omega. 2018-6-11

[9]
Structural Properties Characterized by the Film Thickness and Annealing Temperature for LaO Films Grown by Atomic Layer Deposition.

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