Recent advances in properties and applications of nanoporous materials and porous carbons

State of the art overview material degradation in high-temperature supercritical CO2 environments

Synthesis, Morphology Control, and Application of Hollow Al2O3 Spheres in the Steam Methane Reforming Process

In the present work, the synthesis of tungsten oxide nanosheets (WO3-NS) was performed through a sol–gel method with the usage of Na2WO4 as the tungsten source in a gelatin solution that functioned as a novel green stabilising agent. The synthesised WO3-NS were characterised by the analysing methods of XRD, FESEM/EDX, FTIR, TGA/DTG, UV–vis, Raman, and VSM. The photocatalytic activity of the product is investigated through the exertion of methylene blue pigment, while the obtained results reported 95% of degradation in 187 min under the light of a mercury vapour lamp. The cytotoxicity effect of WO3-NS on the human liver (Huh-7) cell line was evaluated by the means of the MTT method, which displayed the inhibiting capabilities of these nanosheets regarding cancer cells. 

https://onlinelibrary.wiley.com/doi/pdfdirect/10.1049/mna2.12134

Green synthesis of tungsten oxide (WO
 3
 ) nanosheets and investigation of their photocatalytic and cytotoxicity effects

Irradiation accelerated corrosion of alumina-forming austenitic steels in supercritical CO2: the oxide scale formed within an individual grain or affected by grain boundary

Understanding the stress corrosion cracking growth mechanism of a cold worked alumina-forming austenitic steel in supercritical carbon dioxide

On the role of mechanical deformation in the environmental degradation of 310S stainless steels in supercritical carbon dioxide

New insights into the initial oxidation behavior of an ultra-corrosion resistant alumina-forming austenitic steel in supercritical carbon dioxide: The effects of precipitated intragranular intermetallic compounds


 The corrosion behavior of two stainless steels (310S and alumina-formed 310S) treated by different surface treatment methods (polishing or grinding) has been investigated after exposed to high-temperature supercritical carbon dioxide (sCO2) at 650°C / 20 MPa. The microstructure and microchemistry of materials have been analyzed and compared before and after exposure. The results show that polishing deteriorates the corrosion resistance, while grinding enhances the anti-oxidation and anti-carburization capability of materials. Thick and unprotective Fe-rich oxides are formed on the polished 310S and alumina-formed 310S, which leads to the poor carburization resistance. Much thinner oxides and shallower carburization depths can be observed on the materials treated by grinding. Continuous Cr-rich oxide is formed on the grinded 310S, while outer Cr-rich and inner Al-rich oxides are formed on the grinded alumina-formed 310S. Grinding deforms the surface region of materials. An outer ultra-fine grain layer and an inner highly deformed grain layer are located at the surface, which own fast diffusion paths and enhance the element diffusion rates (especially Cr and Al). This leads to the transition from the formation of unprotective Fe-rich oxide layers to the protective Cr-rich or Al-rich oxide layers, which not only hinders further oxidation of the matrix, but also reduces the carbon permeation. Improved oxidation and carburization resistance therefore occurs on the materials treated by grinding after exposed to high temperature sCO2 environment.

Effect of Surface Treatment on the Corrosion Behavior of Stainless Steels in High-Temperature Supercritical Carbon Dioxide

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Papers

Understanding the stress corrosion cracking growth mechanism of a cold worked alumina-forming austenitic steel in supercritical carbon dioxide

On the role of mechanical deformation in the environmental degradation of 310S stainless steels in supercritical carbon dioxide

New insights into the initial oxidation behavior of an ultra-corrosion resistant alumina-forming austenitic steel in supercritical carbon dioxide: The effects of precipitated intragranular intermetallic compounds

Effect of Surface Treatment on the Corrosion Behavior of Stainless Steels in High-Temperature Supercritical Carbon Dioxide