Method for generating singlet oxygen by activating hydrogen persulfate with hydroxyl-rich metal oxide

Abstract

The invention relates to a method for generating singlet oxygen by activating hydrogen persulfate with a hydroxyl-rich metal oxide. The method comprises the following steps: adding a hydroxyl-rich metal oxide and hydrogen persulfate into a solvent to obtain a mixed solution, and carrying out a stirring reaction process at 10-30 DEG C, wherein the mass concentration of the hydroxyl-rich metal oxidein the mixed solution is 0.1-2.0 g / L and the concentration of the hydrogen persulfate in the mixed solution is 0.20-5.00 mmol / L. According to the method, singlet oxygen is immediately generated at the beginning of reaction, no other reactive oxygen substance is generated in the whole reaction process, efficient and directional generation of the singlet oxygen is achieved, the activity of the singlet oxygen is not affected at all, pollutants can be efficiently degraded and the used activating agent is non-toxic and harmless.

Description

technical field [0001] The invention relates to a method for generating singlet oxygen by activating hydrogen persulfate with a hydroxyl-rich metal oxide, which belongs to the field of water treatment. Background technique [0002] singlet oxygen ( 1 o 2 ) is the lowest excited state of a diatomic oxygen molecule, also known as an excited state oxygen molecule, whose physical and chemical properties are different from those of a diatomic oxygen molecule. Singlet oxygen is in a quantum state in which all electrons are spin-paired, paramagnetic, dynamically unstable at ambient temperature, and decays very slowly. Singlet oxygen has strong oxidizing properties and good reactivity with organic compounds. It is used in many fields such as organic synthesis, drug synthesis, sterilization and disinfection, cancer treatment, environmental restoration, and pollutant treatment. Trace amounts of singlet oxygen exist in the upper atmosphere and in polluted urban atmospheres, where it...

AI Technical Summary

Problems solved by technology

However, there are still the following problems in this method: 1. The photosensitizers usually used are toxic and harmful substances (such as highly toxic porphyrin photosensitizers), so the application of this method in fields such as biomedicine and water treatment is limited. 2, the photosensitizer used in this method is generally a water-soluble substance, which is unfavorable for subsequent separation; 3, when this method produces singlet oxygen, it is often accompanied by the generation of other reactive oxygen species (such as superoxide free radicals, hydroxyl free radicals base, etc.), cannot efficiently and directionally generate singlet oxygen

The current common preparation methods have many problems such as inconvenient transportation of raw materials, high cost, inconvenient use, and inability to prepare on-site.

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