Preparation method and application of Fe4I3O24H15 visible-light-induced photocatalyst

Abstract

The invention discloses a preparation method and the application of a Fe4I3O24H15 visible-light-induced photocatalyst. The preparation method comprises the steps of dissolving a certain amount of Fe (NO3)3. 9H2O into deionized water, and then feeding a certain amount of concentrated nitric acid into the deionized water to obtain acidic ferric nitrate solution; dissolving a certain amount of NaIO4 into the deionized water to obtain sodium metaperiodate solution; heating the obtained ferric nitrate solution and sodium metaperiodate solution up to 80 DEG C, and mixing the two solutions in a stirring state to obtain earthy yellow precipitate; separating out the precipitate, and drying for 5 hours at the temperature of 60 DEG C to obtain the Fe4I3O24H15 sample. The Fe4I3O24H15 visible-light-induced photocatalyst prepared by the method is capable of degrading rhodamine B dye under the visible light, and the activity of the Fe4I3O24H15 visible-light-induced photocatalyst is superior to those of commercial titanium dioxide P25 and high-activity AgI photocatalyst. The Fe4I3O24H15 compound is high in visible-light catalytic activity, simple and convenient in preparation process, low in cost, good in durability, non-toxic and beneficial to large-scale popularization and application.

Description

technical field [0001] The invention belongs to the photocatalytic technology in environmental treatment, and in particular relates to a novel visible light catalyst Fe 4 I 3 O 24 H 15 and its preparation method, and its application in photocatalytic degradation of organic dye pollutants. Background technique [0002] Semiconductor photocatalysis technology can directly utilize sunlight to efficiently oxidatively degrade organic pollutants at room temperature. Therefore, taking full advantage of sunlight to degrade organic pollutants through photocatalysis is a favorable way to solve the current environmental pollution problem. Because ultraviolet light only accounts for about 4% of the total energy of sunlight, while visible light accounts for about 46%, the key to utilizing solar energy is to utilize the visible light in sunlight. Therefore, visible light-responsive photocatalysts (visible light catalysts for short) have important application prospects in the field of...

AI Technical Summary

Problems solved by technology

Achieving higher visible-light photocatalytic activity than these inorganic silver salts by developing novel photocatalysts is a great challenge in itself.

In addition, it is very important that these existing visible light catalysts generally have one or more of the following disadvantages: (1) low activity

Such as CdS, because of the unfavorable factors of energy band structure, its photocatalytic degradation activity of organic pollutants is low

(2) High preparation cost

(3) Low stability

Such as CdS, AgI, Ag 3 PO 4 、Ag 3 AsO 4 , they are all prone to photocorrosion during the photocatalytic process, and photocorrosion generally leads to the reduction of photocatalytic activity, so the durability is low

(4) High toxicity

These technologies have seriously hindered the practical application of photocatalytic technology.

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