The present invention discloses a CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst for efficiently degrading atrazine by activating peroxymonosulfate, preparation method and application thereof. The CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst is prepared by three steps: the first step is acid-leaching of WTRs, using the WTRs as iron source to provide the iron ions required for the synthesis of CoFe.sub.2O.sub.4; the second step is preparing of a precursor, synthesizing CoFe.sub.2O.sub.4 by chemical co-precipitation method and uniformly loading the prepared CoFe.sub.2O.sub.4 on the WTRs; and the third step is calcining the precursor to synthesize the CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst. The catalytic performance of the CoFe.sub.2O.sub.4-WTRs composite magnetic catalyst prepared by the present invention is evaluated using PMS as an oxidant and atrazine as a target pollutant. The CoFe.sub.2O.sub.4-WTRs can efficiently remove atrazine from the actual water, exhibiting good potential for practical application.

The present invention is directed to a method and system for enhancing the production of ammonia from gaseous hydrogen and nitrogen. Advantageously, the method and system does not emit carbon gases during production. The method and system enhances the production of ammonia compared to traditional Haber-Bosch reactions.

The invention provides a process for the preparation of bismuth oxyhalide, comprising a precipitation of bismuth oxyhalide in an acidic aqueous medium in the presence of a reducing agent. Also provided are bismuth oxyhalide compounds doped with elemental bismuth Bi.sup.(0). The use of Bi.sup.(0) doped bismuth oxyhalide as photocatalysts in water purification is also described.

Novel compositions of matter based on homopiperazine precursor materials and forming a homopiperazine-based ligand are disclosed, along with suitable techniques and materials for the synthesis and utilization thereof. In particular various synthetic schemes and techniques for applying the disclosed compositions of matter as a decontaminating agent. The decontaminating agents include homopiperazine-based ligand-metal complexes that are particularly effective at neutralizing toxicity of nerve agents, pesticides, and other toxic organophosphorus-based compounds. In preferred approaches, the homopiperazine-based ligand-metal complexes act as catalysts to facilitate substitution of a leaving group of the organophosphorus-based compound with a functional group that does not permit the organophosphorus-based compound to inactivate acetylcholinesterase upon introduction of the organophosphorus-based compound to a living organism such as insects and mammals. Advantageously, the catalytic homopiperazine-based ligand-metal complexes are formed using inexpensive, readily-available precursor materials, and may be utilized to neutralize toxins without relying on damaging caustic reactants or environmentally unfriendly organic solvents.

A modified bed particles, related methods and applications in processes involving microwave-assisted catalytic reactions. The bed particles modified to be used as a microwave receptor that is capable to simultaneously sustain heat generation mechanisms under microwave irradiations and physically act as catalyst support. The bed particle comprises a dielectric coating deposited on an external surface of a core, the bed particle being sized for use in a fixed bed reactor or a fluidized bed reactor. The bed particles may further comprise a catalytically active material supported on a surface of the dielectric coating. Irradiating the gas-solid reactor with microwaves enables heating the dielectric coating of the solid bed particles, the dielectric coating locally transferring thermal energy to the surrounding gaseous reactants which are thereby selectively converted into the primary products.

A method of degrading a polymer into oligomers and/or monomers in a solvent, using a catalyst, and a functionalized magnetic particle comprising a catalyst being capable of degrading the polymer into oligomers and/or monomers. The present method and particle provide a high selectivity and a high conversion ratio.

The present invention provides a monatomic metal-doped few-layer molybdenum disulfide electrocatalytic material, a preparing method thereof, and a method for electrocatalytic nitrogen fixation. The material has a few-layer ultra-thin and irregular flake-like microstructure with a length and a width of nanometer scale. A doping metal in the monatomic metal-doped few-layer molybdenum disulfide electrocatalytic material is dispersed in a form of single atoms. When the catalyst is used in electrochemical reduction of N.sub.2, a Faradic efficiency in selective reduction of N.sub.2 into NH.sub.4.sup.+ is 18% or above, and stability of the catalyst is better.

A method of making a multicomponent photocatalyst, includes inducing precipitation from a pre-cursor solution comprising a pre-cursor of a plasmonic material and a pre-cursor of a reactive component to form co-precipitated particles; collecting the co-precipitated particles; and annealing the co-precipitated particles to form the multicomponent photocatalyst comprising a reactive component optically, thermally, or electronically coupled to a plasmonic material.

This invention relates to a supported catalyst for synthesizing ammonia (NH3) from nitrogen gas (N2) and hydrogen gas (H2), method of making the support, and methods of decorating the support with the catalyst.

A method of preparing a catalyst for a fuel cell includes no carbon support. The method of preparing a catalyst for a fuel cell includes preparing a first metal nanoparticle having a polyhedral shape, growing a second metal along the edge of the first metal nanoparticle, and removing the first metal nanoparticle.