WO 3 has been highlighted as a promising material as photochromic and photocatalytic industrial application. Even though many papers reported their interesting properties, it has been rarely reported bifunctional performances. In this study, we demonstrate the effect of Cs ions on the crystal structure of WO 3 for inducing bifunctional photocatalytic and magnetic properties. Hexagonal Cs-doped WO 3 nanoparticles were prepared via a two-step approach. Chemical coprecipitation was conducted using ammonium tungstate and Cs 2 CO 3 in acidic media. Subsequently, the nanoparticles were annealed at a low temperature under N 2 flow. The prepared WO 3 nanoparticles doped with 0.5 Cs exhibit enhanced adsorption ability and photocatalytic activity compared those doped with different amounts of Cs. The addition of Cs to WO 3 modifies the electronic structure of the material, resulting in an increased number of unpaired electrons that can be used to couple magnetic moments. The results confirm that introducing Cs dopants into WO 3 leads to bifunctional optical and electrical characteristics of WO 3 . It is expected that current work contributes bifunctional performances in an industrial application.

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Polymeric microcapsules can be fabricated by using kernel process called “micro chemical plant system”. The size of microcapsules is more uniform than those made in the conventional pathways. Spherical microcapsules are fabricated through the innovative conjunction of the well-defined amphiphilic block copolymer and stable microfluidic procedure. Crossed microchannel chemical plant are fabricated by using double deep reactive ion etch (DRIE) on 400 μm-thick silicon wafer. The width and depth of this are 100 μm, respectively. PS-b-PMMA copolymer is synthesized by atomic transfer radical polymerization (ATRP) and molecular weight and poly dispersity index (PDI) is 9837 g/mol and 1.08, respectively. With the introduction of two immiscible fluids into the microchannel, droplet flows are visualized by using a high speed CCD camera. The microcapsule was formed due to supramolecular self-assembly of copolymer in the droplet. The characteristics of the produced microcapsules were measured by SEM. A new microfilter was also introduced to separate microcapsule from the suspension fluid.