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立方氧化锆纳米颗粒/高度还原石墨烯（HRG）基纳米复合材料的溶剂热制备及电化学表征

Solvothermal Preparation and Electrochemical Characterization of Cubic ZrO₂ Nanoparticles/Highly Reduced Graphene (HRG) based Nanocomposites.

作者信息

Shaik Mohammed Rafi, Alam Manawwer, Adil Syed Farooq, Kuniyil Mufsir, Al-Warthan Abdulrahman, Siddiqui Mohammed Rafiq H, Tahir Muhammad Nawaz, Labis Joselito P, Khan Mujeeb

机构信息

Department of Chemistry, College of Science, King Saud University, P.O. 2455, Riyadh 11451, Saudi Arabia.

Chemistry Department, King Fahd University of Petroleum and Materials, Dhahran 31261, Saudi Arabia.

出版信息

Materials (Basel). 2019 Feb 28;12(5):711. doi: 10.3390/ma12050711.

DOI:10.3390/ma12050711
PMID:30823461
原文链接:https://pmc.ncbi.nlm.nih.gov/articles/PMC6427155/
Abstract

A single-step solvothermal approach to prepare stabilized cubic zirconia (ZrO₂) nanoparticles (NPs) and highly reduced graphene oxide (HRG) and ZrO₂ nanocomposite (HRG@ZrO₂) using benzyl alcohol as a solvent and stabilizing ligand is presented. The as-prepared ZrO₂ NPs and the HRG@ZrO₂ nanocomposite were characterized using transmission electron microscopy (TEM) and X-ray diffraction (XRD), which confirmed the formation of ultra-small, cubic phase ZrO₂ NPs with particle sizes of ~2 nm in both reactions. Slight variation of reaction conditions, including temperature and amount of benzyl alcohol, significantly affected the size of resulting NPs. The presence of benzyl alcohol as a stabilizing agent on the surface of ZrO₂ NPs was confirmed using various techniques such as ultraviolet-visible (UV-vis), Fourier-transform infrared (FT-IR), Raman and XPS spectroscopies and thermogravimetric analysis (TGA). Furthermore, a comparative electrochemical study of both as-prepared ZrO₂ NPs and the HRG@ZrO₂ nanocomposites is reported. The HRG@ZrO₂ nanocomposite confirms electronic interactions between ZrO₂ and HRG when compared their electrochemical studies with pure ZrO₂ and HRG using cyclic voltammetry (CV).

摘要

本文介绍了一种单步溶剂热法，该方法使用苯甲醇作为溶剂和稳定配体来制备稳定的立方氧化锆（ZrO₂）纳米颗粒（NPs）以及高度还原的氧化石墨烯（HRG）与ZrO₂的纳米复合材料（HRG@ZrO₂）。使用透射电子显微镜（TEM）和X射线衍射（XRD）对所制备的ZrO₂ NPs和HRG@ZrO₂纳米复合材料进行了表征，结果证实，在这两种反应中均形成了粒径约为2 nm的超小立方相ZrO₂ NPs。反应条件（包括温度和苯甲醇用量）的轻微变化会显著影响所得NPs的尺寸。通过紫外可见（UV-vis）、傅里叶变换红外（FT-IR）、拉曼光谱和X射线光电子能谱（XPS）以及热重分析（TGA）等多种技术，证实了苯甲醇作为稳定剂存在于ZrO₂ NPs表面。此外，还报道了对所制备的ZrO₂ NPs和HRG@ZrO₂纳米复合材料的对比电化学研究。通过循环伏安法（CV）将HRG@ZrO₂纳米复合材料与纯ZrO₂和HRG的电化学研究进行比较，证实了ZrO₂与HRG之间存在电子相互作用。

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