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A novel idea is proposed to improve the SO2 tolerance of low-temperature selective catalytic reduction (SCR) catalysts by using a RHO zeolite membrane to separate NO from SO2 to reduce the contact between SO2 and the SCR catalysts. RHO zeolite membranes were prepared on a macroporous stainless steel tube. The results from XRD and SEM measurements indicated that the crystals on the surface were pure...
Membrane separation technologies are of great interest in industrial processes such as water purification, gas separation, and materials synthesis. However, commercial filtration membranes have broad pore size distributions, leading to poor size cutoff properties. In this work, mesoporous silica thin membranes with uniform and large vertical mesochannels are synthesized via a simple biphase stratification...
Here, we report the ensemble-averaged measurement of SERS hot spots EF from spatially isolated colloidal nanoclusters. This approach was achieved by well-defined Au@Ag core-shell NP dimers and trimers-the simplest structure to investigate SERS hot spots phenomenon. These hot spots units with similar nature were made up of uniform Au@Ag NPs attached by a close-paking Raman reporter monolayer, then...
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