In this paper, the graphene oxide loaded with nano titanium dioxide (TiO2–GO) was synthesized through 3-isocyanatopropyltrimethoxysilane (IPTMS) and characterized by Fourier transform infrared spectroscopy (FTIR), X-ray diffraction analysis (XRD), X-ray photoelectron spectroscopy (XPS), scanning electron microscopy (SEM), thermogravimetric analysis (TGA), and dispersion test. The results illustrated our modification was successful and TiO2–GO was transferred from hydrophilic to hydrophobic. That greatly enhanced the dispersity of TiO2–GO in epoxy through the observation of the coating morphology test. Moreover, the impact of TiO2–GO on anti-corrosion property in epoxy was investigated by Electrochemical Impedance Spectroscopy (EIS). Comparing to pristine particles including GO and TiO2, TiO2–GO could more significantly improve the resistance of corrosion with the help of IPTMS. Furthermore, the anti-corrosion mechanism of TiO2–GO in epoxy was tentatively proposed and discussed.
<p>The metaverse is a new form of the future of the Internet that integrates many new technologies, and its combination with the education sector has great potential. The article firstly points out that metaverse is a concept that is constantly developing and evolving, while the educational metaverse has three core features: interactivity, immersion and multiplicity, and introduces the six underlying supporting technologies and application scenarios of the educational metaverse. The article then presents the current development of the educational metaverse represented by the VR/AR learning environment, starting with case studies from the fields of subject education, informal learning and vocational training. Finally, the article analyses the problems and challenges faced by the educational metaverse and makes suggestions for the initial development of the educational metaverse in terms of mechanism, technology and teaching. The educational meta-universe opens another door to the study of the complexity of educational systems and the laws of educational occurrence and development, while the study of its applications, challenges and perspectives gives direction and impetus to the development of the educational meta-universe.</p>
This paper reported an inorganic route that uses potassium silicate, which is one type of alkali silicate as an inorganic modifier, taking advantage of its instability and water condensation to decorate graphene oxide (GO) with nano-SiO 2 . The ingredients of prepared nanocomposites were characterized by Fourier-transform infrared spectroscopy (FT-IR) and X-ray photoelectron spectroscopy (XPS), and the thermodynamic property was tested by thermal gravimetric analysis (TGA). Scanning electron microscopy (SEM) was used to observe the morphology of SiO 2 -GO nanocomposites. All the analyses above revealed the nano-SiO 2 (<100 nm) was deposited on the surface of GO by chemical bonds. In the meantime, the dispersion test illustrated that nano-SiO 2 played an important role in improving the dispersity of GO. The effect of SiO 2 -GO nanocomposites on barrier and corrosion protection performance of SiO 2 -GO nanocomposites was tested by immersion experiment and electrochemical impedance spectroscopy (EIS). The results indicated that GO was helped to block the corrosion of aggressive medium; moreover, SiO 2 -GO nanocomposites had the best anticorrosion performance and the slowest rate of corrosion because of its good dispersity with waterborne epoxy coatings.
<p>The metaverse is a new form of the future of the Internet that integrates many new technologies, and its combination with the education sector has great potential. The article firstly points out that metaverse is a concept that is constantly developing and evolving, while the educational metaverse has three core features: interactivity, immersion and multiplicity, and introduces the six underlying supporting technologies and application scenarios of the educational metaverse. The article then presents the current development of the educational metaverse represented by the VR/AR learning environment, starting with case studies from the fields of subject education, informal learning and vocational training. Finally, the article analyses the problems and challenges faced by the educational metaverse and makes suggestions for the initial development of the educational metaverse in terms of mechanism, technology and teaching. The educational meta-universe opens another door to the study of the complexity of educational systems and the laws of educational occurrence and development, while the study of its applications, challenges and perspectives gives direction and impetus to the development of the educational meta-universe.</p>
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