The impact of pH in the hydrothermal synthesis of ZnO nanorods on the structural properties and UV detection performance

IF 2.8 4区工程技术 Q2 ENGINEERING, ELECTRICAL & ELECTRONIC Journal of Materials Science: Materials in Electronics Pub Date : 2025-01-13 DOI:10.1007/s10854-024-14193-w

Eka Nurfani, Cindy Chotimah, Wahyu Solafide Sipahutar, Resti Marlina

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Abstract

The effect of pH in hydrothermal synthesis on the structural properties and photodetector performance of ZnO nanorods has been successfully investigated. Calculating the molar ratio among zinc acetate dihydrate (ZAD), methenamine (ME), and sodium hydroxide (NaOH) is important to obtain pH variations. By applying ZAD:ME (1:1), ZAD:NaOH (1:1), and ZAD:ME:NaOH (1:1:1), pH variations of 5.96 (S1), 6.80 (S2), and 7.23 (S3) were obtained, respectively. Morphological images from field-emission scanning electron microscope (FESEM) show that the average diameter of ZnO nanorods is about 75.6 nm (S1), 146.4 nm (S2), dan 173.8 nm (S3). From the optical properties analysis carried out using UV–visible spectroscopy (UV–vis), the transmittance increased by increasing the pH, while the absorption showed a different pattern. The bandgap values are 2.6, 3.1, and 3.2 eV for the S1, S2, and S3 samples, respectively. Furthermore, based on current–voltage (I-V) curves, the S3 sample has the highest UV sensitivity with a very fast response time (7.1 s for rise time and 3.9 s for decay time). This study is important to realize future optoelectronic technology.

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水热合成ZnO纳米棒时pH值对结构性能和紫外检测性能的影响

研究了水热合成中pH值对ZnO纳米棒结构性能和光电探测器性能的影响。计算二水合乙酸锌（ZAD）、甲基苯丙胺（ME）和氢氧化钠（NaOH）的摩尔比对于获得pH变化非常重要。ZAD:ME（1:1）、ZAD:NaOH（1:1）和ZAD:ME:NaOH（1:1:1）的pH变化分别为5.96 （S1）、6.80 （S2）和7.23 （S3）。场发射扫描电镜（FESEM）形貌图显示，ZnO纳米棒的平均直径分别为75.6 nm （S1）、146.4 nm （S2）和173.8 nm （S3）。从紫外可见光谱（UV-vis）光学性质分析来看，透过率随pH值的增加而增加，而吸收则呈现不同的模式。S1、S2和S3样品的带隙值分别为2.6、3.1和3.2 eV。此外，基于电流-电压（I-V）曲线，S3样品具有最高的紫外灵敏度，响应时间非常快（上升时间为7.1 s，衰减时间为3.9 s）。该研究对实现未来光电技术具有重要意义。

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来源期刊

Journal of Materials Science: Materials in Electronics 工程技术-材料科学：综合

CiteScore

5.00

自引率

7.10%

发文量

1931

审稿时长

2 months

期刊介绍： The Journal of Materials Science: Materials in Electronics is an established refereed companion to the Journal of Materials Science. It publishes papers on materials and their applications in modern electronics, covering the ground between fundamental science, such as semiconductor physics, and work concerned specifically with applications. It explores the growth and preparation of new materials, as well as their processing, fabrication, bonding and encapsulation, together with the reliability, failure analysis, quality assurance and characterization related to the whole range of applications in electronics. The Journal presents papers in newly developing fields such as low dimensional structures and devices, optoelectronics including III-V compounds, glasses and linear/non-linear crystal materials and lasers, high Tc superconductors, conducting polymers, thick film materials and new contact technologies, as well as the established electronics device and circuit materials.