Malus domestica and Solanum lycopersicum Mixtures for the Synthesis of Graphene Silver and Zinc Oxide Nanocomposites  

作　　者：Rachel Fanelwa Ajayi Siphokazi Tshoko Candice Franke Nokwanda Ngema Veli Thipe Takalani Mulaudzi Rachel Fanelwa Ajayi;Siphokazi Tshoko;Candice Franke;Nokwanda Ngema;Veli Thipe;Takalani Mulaudzi(SensorLab, Department of Chemistry, University of the Western Cape, Bellville, South Africa;Laboratório de Ecotoxicologia, Centro de Química e Meio Ambiente, Instituto de Pesquisas Energéticas e Nucleares (IPEN), Comissão Nacional de Energia Nuclear (IPEN/CNEN-SP), São Paulo, Brazil;Department of Biotechnology, University of the Western Cape, Bellville, South Africa)

机构地区：[1]SensorLab, Department of Chemistry, University of the Western Cape, Bellville, South Africa [2]Laboratório de Ecotoxicologia, Centro de Química e Meio Ambiente, Instituto de Pesquisas Energéticas e Nucleares (IPEN), Comissã o Nacional de Energia Nuclear (IPEN/CNEN-SP), Sã o Paulo, Brazil [3]Department of Biotechnology, University of the Western Cape, Bellville, South Africa

出　　处：《Journal of Surface Engineered Materials and Advanced Technology》2022年第4期61-81,共21页表面工程材料与先进技术期刊（英文）

摘　　要：This study reports on the novel and simple green method involving the use of apple (Malus domestica) and tomato (Solanum lycopersicum) extracts in the synthesis of electroactive layers of silver nanoparticles|graphene oxide (AgNPs|GO) and zinc oxide nanoparticles|graphene oxide (ZnONPs|GO). The surface morphology of the green synthesized nanocomposites was studied using High-Resolution Transmission Electron Microscopy (HRTEM), High-Resolution Scanning Electron Microscopy (HRSEM) while the elemental analysis was studied using Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy and X-Ray diffraction (XRD) and their optical properties were further characterised using Ultraviolet Spectroscopy (UV-vis). The electrochemical studies of these nanocomposites were achieved using cyclic voltammetry (CV) where an increase in electron conductivity of the AgNPs|GO and ZnONPs|GO nanocomposite was observed. Comparatively, the silver nanoparticulate-based platforms were observed to have superior electrochemical properties as opposed to the zinc oxide-based platform. The observed electrochemical activities of the synthesized nanocomposites are a good indication of their suitability as electroactive platforms towards the development of electrochemical sensors. Electrochemical sensors are popular in the Electrochemistry field because they may be developed using different methods in order to suit their intended analytes. As such, the synthesis of a variety of electrochemical platforms provides researchers with a vast range of options to select from for the detection of analytes.This study reports on the novel and simple green method involving the use of apple (Malus domestica) and tomato (Solanum lycopersicum) extracts in the synthesis of electroactive layers of silver nanoparticles|graphene oxide (AgNPs|GO) and zinc oxide nanoparticles|graphene oxide (ZnONPs|GO). The surface morphology of the green synthesized nanocomposites was studied using High-Resolution Transmission Electron Microscopy (HRTEM), High-Resolution Scanning Electron Microscopy (HRSEM) while the elemental analysis was studied using Fourier Transform Infrared Spectroscopy (FTIR), Raman spectroscopy and X-Ray diffraction (XRD) and their optical properties were further characterised using Ultraviolet Spectroscopy (UV-vis). The electrochemical studies of these nanocomposites were achieved using cyclic voltammetry (CV) where an increase in electron conductivity of the AgNPs|GO and ZnONPs|GO nanocomposite was observed. Comparatively, the silver nanoparticulate-based platforms were observed to have superior electrochemical properties as opposed to the zinc oxide-based platform. The observed electrochemical activities of the synthesized nanocomposites are a good indication of their suitability as electroactive platforms towards the development of electrochemical sensors. Electrochemical sensors are popular in the Electrochemistry field because they may be developed using different methods in order to suit their intended analytes. As such, the synthesis of a variety of electrochemical platforms provides researchers with a vast range of options to select from for the detection of analytes.

关 键 词：Zinc Oxide Electrochemical Sensors Silver Nanoparticles Graphene Oxide NANOCOMPOSITES Malus domestica Solanum lycopersicum ELECTROCHEMISTRY 

分 类 号：O62[理学—有机化学]