Alotaibi Badriah M, Chen Xianjue, Alharbi Thaar M D, Heydari Amir, Raston Colin L
Flinders Institute for Nanoscale Science and Technology, College of Science and Engineering, Flinders University, Adelaide, SA 5042, Australia.
School of Environmental and Life Sciences, The University of Newcastle, Callaghan, New South Wales, 2308, Australia.
Chemistry. 2025 Feb 3;31(7):e202403207. doi: 10.1002/chem.202403207. Epub 2024 Nov 26.
We have developed a rapid and facile method for preparing free-standing nanocomposite of gold nanoparticles with graphene oxide (Au@GO) in water under continuous flow in the absence of harsh reducing agents and any other auxiliary substances, as a method with favourable green chemistry metrics. This uses a vortex fluidic device (VFD) where induced mechanical energy and photo-contact electrification associated with the dynamic thin film in the rapidly rotating tube tilted at 45° while simultaneously UV irradiated (λ=254 nm, 20 W) results in decomposition of water to hydrogen and hydrogen peroxide with growth of the gold nanoparticles on the surface of the GO. We have established that the resulting Au@GO composite sheets rapidly catalyse the degradation of commercial dyes like methyl orange (MO) and methylene blue (MB) using the hydrogen peroxide generated in situ in the VFD. This process relies on active radicals generated through liquid-solid photo-contact electrification of water in the VFD which dramatically minimises the generation of waste in industrial applications, with the reaction having implications for wastewater treatment.
我们开发了一种快速简便的方法，可在连续流动的条件下，于水中制备金纳米颗粒与氧化石墨烯的独立式纳米复合材料（Au@GO），且无需苛刻的还原剂和任何其他辅助物质，是一种具有良好绿色化学指标的方法。该方法使用了一种涡旋流体装置（VFD），在以45°倾斜的快速旋转管中，与动态薄膜相关的感应机械能和光接触起电，同时进行紫外线照射（λ=254 nm，20 W），导致水分解为氢气和过氧化氢，金纳米颗粒在氧化石墨烯表面生长。我们已经证实，所得的Au@GO复合片材利用VFD中原位生成的过氧化氢，能快速催化降解甲基橙（MO）和亚甲基蓝（MB）等商业染料。此过程依赖于VFD中通过水的液 - 固光接触起电产生的活性自由基，这极大地减少了工业应用中的废物产生，该反应对废水处理具有重要意义。
