利用稻壳开发掺稀土的 SiO2/rGO，用于抗氧化、光催化、电化学和传感器研究

IF 4.8 2区材料科学 Q1 MATERIALS SCIENCE, CHARACTERIZATION & TESTING

Materials Characterization Pub Date : 2024-11-02 DOI:10.1016/j.matchar.2024.114504

N. Swetha , V. Venkata Lakshmi , M. Mylarappa , S. Chandruvasan , K.S. Harisha

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引用次数: 0

摘要

本研究采用回流法合成了铈负载二氧化硅（Ce-SiO2/rGO）纳米复合材料。利用 X 射线衍射（XRD）、傅立叶变换红外光谱（FTIR）、扫描电子显微镜（SEM）、透射电子显微镜（TEM）和能量色散（EDAX）技术对 Ce-SiO2/rGO 进行了确认。在光降解研究中，Ce-SiO2/rGO 纳米复合材料（95%）在 150 分钟内高效降解了玫瑰红（RB）染料，降解动力学遵循一阶动力学。对 2,2-二苯基-1-苦基肼（DPPH）的抗氧化性能达到 98%，IC50 值为 488.35 mg/mL。与 rGO、SiO2 和 SiO2/rGO 相比，Ce-SiO2/rGO 的超级电容值分别有所提高。使用 1 M KCl 通过循环伏安法测定了电化学可逆性（EO-ER）和扩散系数（D）值。Ce-SiO2/rGO 纳米复合材料被用作检测蜂花粉和牛尿的电化学传感器。所制备的材料具有优异的染料纯化、氧化还原行为、生物分子检测和抗氧化能力。

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Development of rare earth doped SiO2/rGO from rice husk for antioxidant, photocatalysis, electrochemical and sensor studies

The present work determines the synthesis of cerium loaded silicon dioxide (Ce-SiO₂/rGO) nanocomposite by using reflux method. The Ce-SiO₂/rGO was confirmed by using X-ray diffraction (XRD), Fourier-transform infrared spectroscopy (FTIR), scanning electron microscopy (SEM), transmission electron microscopy (TEM) and energy dispersive (EDAX) techniques. In photodecomposition investigation, Rose Bengal (RB) dye was degraded efficiently using Ce-SiO₂/rGO nanocomposite (95 %) at 150 min with follows first order kinetics. The antioxidant property against 2,2-diphenyl-1-picrylhydrazyl (DPPH) was found to be 98 % performance with IC₅₀ value of 488.35 mg/mL. The super capacitance value of Ce-SiO₂/rGO was increased compared to that of rGO, SiO₂ and SiO₂/rGO respectively. The electrochemical reversibility (

E_{O} - E_{R}

) and diffusion coefficient (D) values were determined using 1 M KCl by cyclic voltammetry method. Ce-SiO₂/rGO nanocomposite was used as an electrochemical sensor to detect bee pollen and cow urine. The produced material has superior dye purification, redox behavior, bio-molecule detection, and antioxidative capabilities.

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来源期刊

Materials Characterization 工程技术-材料科学：表征与测试

CiteScore

7.60

自引率

8.50%

发文量

746

审稿时长

36 days

期刊介绍： Materials Characterization features original articles and state-of-the-art reviews on theoretical and practical aspects of the structure and behaviour of materials. The Journal focuses on all characterization techniques, including all forms of microscopy (light, electron, acoustic, etc.,) and analysis (especially microanalysis and surface analytical techniques). Developments in both this wide range of techniques and their application to the quantification of the microstructure of materials are essential facets of the Journal. The Journal provides the Materials Scientist/Engineer with up-to-date information on many types of materials with an underlying theme of explaining the behavior of materials using novel approaches. Materials covered by the journal include: Metals & Alloys Ceramics Nanomaterials Biomedical materials Optical materials Composites Natural Materials.