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US 2015/0031141 A1Published application
Composition and method of using a catalyst for photo-catalytic degradation of contaminant in water
AssigneeUmm Al-Qura University
InventorsZaki S. Seddigi, SALEH A. SALEH
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Abstract
This invention relates to the preparation and making use of a catalyst for the photo-catalytic degradation of methyl tertiary butyl ether (MTBE) in water. Palladium doped on composite Cerium oxide-zinc oxide (Ce2O3—ZnO) photo-catalyst was prepared by wetness incipient impregnation method. This catalyst composition demonstrated 99.6% degradation of MTBE at room temperature in a photo catalytic reaction conducted in oxygen saturated aqueous medium in the presence of UV light.
Claims18
A method, comprises:
- mixing a zinc nitrate hexahydrate and a cerium nitrate hexahydrate to form a solution;
- adding an ethylene glycol to the solution;
- adding a sodium carbonate to the solution to form a precipitate;
- and
- separating the precipitate by centrifugation as a precursor of cerium oxide-zinc oxide (Ce2O3—ZnO) composite.
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A method, comprising:
- dissolving a pre-determined amount of a palladium(II)(Pd) nitrate dihydrate (Pd(NO3)2.2H2O) in a deionized water to form a Pd nitrate impregnated Ce2O3—ZnO particle;
- drying the Pd nitrate impregnated Ce2O3—ZnO particle;
- exposing the Pd nitrate impregnated Ce2O3—ZnO particle to ammonia vapors;
- mixing and drying the Pd nitrate impregnated Ce2O3—ZnO particle;
- and calcining the Pd nitrate impregnated Ce2O3—ZnO particle to obtain a Pd/Ce2O3—ZnO photo-catalyst.
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A process, comprising:
- fitting a cooling jacket;
- adding a Pd/Ce2O3—ZnO photo-catalyst into deionized water containing MTBE and forming a solution;
- loading the solution onto a photochemical reactor and stirring continuously;
- collecting a sample from de-ionized water containing MTBE and designating as an initial concentration of MTBE (Co);
- saturating the sample by passing oxygen;
- collecting the next sample from de-ionized water containing MTBE;
- exposing the sample to UV light;
- collecting the sample at a regular interval of time and estimating an amount of MTBE in collected samples using a gas chromatography.
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Dependencies are inferred from the claim text.