Noble metal alloy‐decorated spherical mesoporous TiO2 nanoparticles were synthesized by the one‐pot, single‐step reaction of Ti(OiPr)4, Au3+, Pt4+, and Pd2+ or by the one‐pot reaction of hollow mesoporous TiO2 nanospheres with Au3+, Pt4+, and Pd2+ by means of a solvothermal method in methanol. Au–Pt–Pd@TiO2, Au–Pt@TiO2, and Au@TiO2 mesoporous nanoparticles with core–shell, yolk–core–shell, and surface‐dispersion morphologies were easily constructed. The noble metal alloy cores of the Au–Pt–Pd@TiO2 and Au–Pt@TiO2 yolk–core–shell nanoparticles have Au@Pt–Pd and Au@Pt embedded sub‐core–shell structures, respectively.

ABSTRACT

Hightlights1. Non-conjugated unsaturated acid derivatives are obtained by treating conjugated dienals in superheated fluids in one-step.2. Simple treatment of all E-dienals in superheated fluids produces thermodynamically less-stable Z unsaturated acid derivatives.3. The obtained non-conjugated unsaturated acid is converted to biologically active -lactone with a hydroxyl group by hydrogen peroxide in one step.

Synopsis:A magnetic separation experiment to recycle nickel from the waste fluid of electroless plating processes was conducted using the open-gradient magnetic separation technique and a HTS bulk magnet system. A magnetic pole containing Gd123-based bulk superconductors was activated to 3.44 T at 34.9 K using a 5 T superconducting solenoid and the field cooling method. The coarse precipitates of nickel sulfate are composed of phosphite ions, which are yielded during the plating reaction by controlling the temperature and pH. Next, the open-gradient magnetic separation technique was employed, with use of water channels to separate the nickel-sulfate crystals from the mixture of the nickel sulfate and phosphite compounds based on the difference in magnetic properties. From the concentrations of each precipitate attracted to the magnetic pole, we succeeded in collecting nickel-sulfate crystals preferentially to the phosphite ions soon after crystal growth began.

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