Method for preparing bismuth-base oxide nanosheet and application of bismuth-base oxide nanosheet

Abstract

The invention discloses a method for preparing a bismuth-base oxide nanosheet and application of the bismuth-base oxide nanosheet. The method for preparing the bismuth-base oxide nanosheet comprises the following steps: (1) mixing bismuth oxide and / or bismuth nitrate, cupric nitrate and water so as to obtain a blue solution; (2) adding sodium hydroxide into the blue solution, and stirring to obtain a flocculence mixture; (3) adding thiourea and CTAB (Cetyltrimethyl Ammonium Bromide) surfactant into the flocculence mixture in sequence, keeping the temperature at 20-160 DEG C for 12h, filtering,cleaning and drying to obtain a BiCuSo nanosheet. When the method is adopted, the BiCuSo nanosheet with a laminated structure can be effectively prepared, and in addition, the prepared BiCuSo nanosheet can have higher catalytic decomposition ability for formaldehyde in a visible area.

Description

technical field [0001] The invention belongs to the field of materials, in particular, the invention relates to a method for preparing bismuth-based oxide nanosheets and applications of bismuth-based oxide nanosheets. Background technique [0002] Formaldehyde has gradually become the main killer of people's health in today's society. A large amount of formaldehyde will inevitably remain in the bedroom or office after decoration, and this type of formaldehyde is released slowly over a long period of time and cannot be eliminated directly in a quick and short period of time. It is no exaggeration to call it the invisible killer of human health in the 21st century. The research results show that when people are exposed to low-dose formaldehyde for a long time, the hazards include: causing chronic respiratory diseases, nasopharyngeal cancer, colon cancer, brain tumor, menstrual disorders, gene mutations in the nucleus, cross-linking in DNA single strands, and cross-linking bet...

AI Technical Summary

Problems solved by technology

However, these three methods have their own limitations

The commonly used air ventilation method relies on air circulation to remove indoor formaldehyde. However, the release cycle of formaldehyde is long, generally reaching 3-15 years. It is obviously unrealistic to remove formaldehyde only by ventilation.

The activated carbon treatment method is to adsorb and remove formaldehyde through the adsorption effect of pores and small pores, but whether it is activated carbon itself or the modified activated carbon on the market, it can only absorb formaldehyde, and it cannot fundamentally degrade formaldehyde. In addition, due to It can only absorb and needs to be replaced regularly. If it is not replaced in time, changes in the surrounding environment, such as temperature rise, may lead to the desorption of formaldehyde

For photocatalysts, the commonly used material is TiO 2 , however TiO 2 It can only absorb and utilize energy in the ultraviolet region. Under normal circumstances, no matter whether it is a living room or an office place, it cannot get sufficient light to excite the photocatalyst; in addition, common environmental factors such as moisture will cause the material to fail.

To sum up, the current methods for dealing with formaldehyde cannot simply and effectively degrade formaldehyde

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