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首页> 外文期刊>Journal of Alloys and Compounds: An Interdisciplinary Journal of Materials Science and Solid-state Chemistry and Physics >Synthesis of RGO/TiO2 nanocomposite flakes and characterization of their unique electrostatic properties using zeta potential measurements
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Synthesis of RGO/TiO2 nanocomposite flakes and characterization of their unique electrostatic properties using zeta potential measurements

机译：RGO / TiO2纳米复合薄片的合成及其使用Zeta电位测量的独特静电性能表征

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摘要

The study aimed at describing the influence of the modification of the electrostatic properties of titanium dioxide (TiO2) nanoparticles by their in situ deposition on the surface of reduced graphene oxide (RGO). For RGO/TiO2 (40 wt%) nanocomposite flake synthesis, we have developed the innovative simplified sol-gel method which is followed by the thermal decomposition of the organic precursor (the intermediate product). The investigation results confirmed that the TiO2 nanoparticles (ca. 94 nm) that covered the surface of RGO existed mostly in the form of hexagonal anatase nanocrystals and were covalently bonded to the RGO surface. The layer of TiO2 nanoparticles acted as an effective spreader between individual RGO flakes. The deposition of TiO2 nanoparticles resulted in a 40% increase of the BET specific surface area of GO. In our study, we show that the deposition of TiO2 nanoparticles on the surface of RGO flakes modifies their electrostatic properties. This suggests that RGO flakes influence the zeta potential of the RGO/TiO2 (40 wt%) surface which would be composed only of TiO2 (contrary to the theory of charged surface sights). The influence of RGO on zeta potential measured on the surface of RGO/TiO2 (40 wt%) nanocomposite flakes was most visible in a distilled water environment and a sodium chloride solution. (c) 2016 Elsevier B.V. All rights reserved.
机译：这项研究旨在描述原位沉积在还原氧化石墨烯（RGO）表面上对二氧化钛（TiO2）纳米粒子的静电性能的影响。对于RGO / TiO2（40 wt％）纳米复合薄片的合成，我们开发了创新的简化溶胶-凝胶法，随后对有机前体（中间产物）进行热分解。研究结果证实，覆盖RGO表面的TiO2纳米颗粒（约94 nm）主要以六边形锐钛矿纳米晶体的形式存在，并共价键合到RGO表面。 TiO2纳米颗粒层可充当单个RGO薄片之间的有效铺展剂。 TiO2纳米颗粒的沉积导致GO的BET比表面积增加40％。在我们的研究中，我们表明TiO2纳米颗粒在RGO薄片表面上的沉积会改变其静电性能。这表明RGO薄片会影响RGO / TiO2表面（40 wt％）的Zeta电位，该表面仅由TiO2组成（与带电视线理论相反）。在蒸馏水环境和氯化钠溶液中，RGO对RGO / TiO2（40 wt％）纳米复合片表面测得的Zeta电位的影响最为明显。 （c）2016 Elsevier B.V.保留所有权利。

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