Fabrication and investigation on Ag nanowires/TiO2 nanosheets/graphene hybrid nanocomposite and its water treatment performance

Abstract

In this paper, a novel Ag nanowires/TiO 2 nanosheets/graphene nanocomposite was fabricated via a facile method of hydrothermal and calcination, and then the water treatment performance of it was evaluated for methylene blue (MB) and Escherichia coli removal. The as-prepared Ag nanowires/TiO 2 nanosheets/graphene nanocomposite was characterized by Fourier-transform infrared spectroscopy (FT-IR), X-ray photoelectron spectroscopy (XPS), X-ray diffraction (XRD), field-emission scanning electron microscopy (FE-SEM), energy-dispersive X-ray spectroscopy (EDX), UV-visible diffuse reflection spectroscopy (DRS), molecular dynamics simulation, and gas chromatography-mass spectrometry (GC-MS). All data revealed that the Ag/ TiO 2 /graphene nanocomposite showed a rich cell structure. The photocatalytic activity of Ag/TiO 2 /graphene nanocomposite is higher than those of pristine TiO 2 nanosheets and TiO 2 /graphene nanocomposite. Under optimized conditions, the degradation efficiency was 100% and 71% for MB (30 mg/L) and with 10 mg Ag/TiO 2 /graphene nanocomposite under UV and visible light irradiation for 2 h, respectively. Ag/TiO 2 /graphene also showed excellent bacteria-killing activity. Meanwhile, the Ag/TiO 2 / graphene nanocomposite exhibited microstructure stability and cyclic stability. The water treatment performance was enhanced mainly attributed to the excellent adsorption performance of graphene and the high efficiency in separation of electron-hole pairs induced by the remarkable synergistic effects of TiO 2 , Ag, and graphene. On the basis of the experimental results, the photocatalytic mechanism and MB degradation mechanism were proposed. It is hoped that our work could avert the misleading message to the readership, hence offering a valuable source of reference on fabricating composite photocatalyst with stable microstructure and excellent performance for their application in the environment clean-up.

Advances in Waterborne Acrylic Resins: Synthesis Principle, Modification Strategies, and Their Applications

“…Organic fluorine modification, silicone modification, nanoparticle modification, alkyl resin modification, and other methods have been designed to enhance the corrosion resistance of waterborne acrylic resin and widened the application of waterborne acrylic resin in the field of metal corrosion protection. 21 In addition, Li et al 22 prepared a new rust converter, which can be used in waterborne acrylic resin to prepare anticorrosive coatings. As one of the economic and effective methods, organosilicon modification has been widely used in the field of corrosion-resistant coatings.…”

Wear behaviour of polymeric materials reinforced with man-made fibres: A comprehensive review about fibre volume fraction influence on wear performance

“…For the design engineer, the depth wear rate is a useful component for estimating the height loss of a composite material at different velocity and pressure conditions. 55,[100][101][102][103] Therefore, it can help in evaluating the wear rate and predicting the required repair periods to overcome the catastrophic failures of machine components due to wear.…”

Graphene-based nanocomposites in analytical extraction processes

“…Graphene-Au NPs nanocomposites are of great interest for surface-enhanced Raman spectroscopy since graphene acts both as solid substrate to stabilise the metal NPs generating homogeneous 'hot spots', and also as sorbent providing large surface area to retain the target compound [59]. Furthermore, nanocomposites based on graphene and rGO with Ag NPs have been exploited as effective platforms for the simultaneous catalytic degradation and removal of organic pollutants, such as pesticides [60] and dyes [61], thus proving their potential application in water decontamination treatments. MOFs were recently considered as promising adsorbents in Analytical Chemistry providing high surface area and porosity, tunable pore size, and easy functionalisation.…”