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A bioi-m-b synergistic photocatalyst for photocatalytic degradation of small organic molecules and its preparation method and application

A photocatalyst and small molecule technology, applied in the field of photocatalysis, can solve the problems of easy photocorrosion and easy decomposition, and achieve good stability and industrial application prospects

Inactive Publication Date: 2018-12-04
ZHENGZHOU NORMAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, as a photocatalyst, BiOI alone has the disadvantages of easy decomposition and photoetching.

Method used

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  • A bioi-m-b synergistic photocatalyst for photocatalytic degradation of small organic molecules and its preparation method and application
  • A bioi-m-b synergistic photocatalyst for photocatalytic degradation of small organic molecules and its preparation method and application

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Effect test

Embodiment 1

[0022] A BiOI-M-B synergistic photocatalyst for photocatalytic degradation of small organic molecules, consisting of BiOI and M-B components, BiOI uniformly dispersed on the surface of the M-B amorphous alloy catalyst, where M is Co, Zn, Cu, Ni Any one element in , Fe and Ag; the ratio of the amount of substances of BiOI and M-B is 0.3-0.7.

[0023] The preparation method of the above-mentioned BiOI-M-B synergistic photocatalyst for photocatalytic degradation of small organic molecules, the specific steps are as follows:

[0024] (1) Preparation of amorphous alloy M-B: the soluble salt of M element reacts with sodium borohydride to form M-B amorphous alloy catalyst;

[0025] (2) Preparation of BiOI-M-B synergistic photocatalyst: BiOI-M-B synergistic photocatalyst was generated under acidic conditions by bismuth nitrate, NaI, amorphous alloy catalyst M-B and polyvinylpyrrolidone.

[0026] Step (1) is as follows: take the soluble salt of M element, dissolve it with distilled wa...

Embodiment 2

[0035] (1) Take Co(NO 3 ) 2 ·6H 2O, dissolve in distilled water, put the prepared cobalt nitrate solution in a constant temperature water bath at 25°C for later use; take sodium borohydride, dissolve it in distilled water, pour the prepared sodium borohydride solution into the dropping funnel, and add it dropwise In the above cobalt nitrate solution, the whole process was continuously stirred, after the dropwise addition was completed, suction filtered, the obtained solid was put into an oven, and dried at 60° C. for 2 hours to obtain the Co-B amorphous alloy catalyst.

[0036] (2) Take NaI, dissolve it in distilled water for later use; take bismuth nitrate pentahydrate in a three-necked flask, and then add 3M HNO 3 and the amorphous alloy catalyst Co-B prepared in step (1), add distilled water to dissolve and stir, then add the weighed polyvinylpyrrolidone, and adjust the solution in the three-necked flask to pH=2 with 1M NaOH; The flask is placed in an oil bath, and the t...

Embodiment 3

[0040] (1) Take Co(NO 3 ) 2 ·6H 2 O, dissolve in distilled water, put the prepared cobalt nitrate solution in a constant temperature water bath at 26°C for later use; take sodium borohydride, dissolve it in distilled water, pour the prepared sodium borohydride solution into the dropping funnel, and add it dropwise In the above cobalt nitrate solution, the whole process was continuously stirred, and after the dropwise addition was completed, suction filtered, and the obtained solid was put into an oven, and dried at 62°C for 2.2 hours to obtain the Co-B amorphous alloy catalyst.

[0041] (2) Take NaI, dissolve it in distilled water for later use; take bismuth nitrate pentahydrate in a three-necked flask, and then add 3M HNO 3 and the amorphous alloy catalyst Co-B prepared in step (1), add distilled water to dissolve and stir, then add the weighed polyvinylpyrrolidone, and adjust the solution in the three-necked flask to pH=2.1 with 1M NaOH; The flask is placed in an oil bath...

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Abstract

The invention discloses a BiOI-M-B synergistic photocatalyst for photocatalytic degradation of organic small molecules. It is composed of two components: BiOI and M-B. BiOI is evenly dispersed on the surface of the M-B amorphous alloy catalyst. Among them, M is any element among Co, Zn, Cu, Ni, Fe and Ag; the ratio of the amounts of BiOI and M-B is 0.3-0.7. The invention provides a catalyst for photocatalytic degradation of organic small molecules (such as methyl orange and phenol), which is mainly composed of BiOI and M-B amorphous alloy. The catalyst makes up for the low photodegradation efficiency and easy use of pure BiOI catalysts. Decomposition and other shortcomings, the BiOI and M‑B synergistic photocatalyst can not only efficiently and quickly degrade small organic molecules (such as methyl orange, phenol, etc.), but also the catalyst is reused 10 times, and the rate of photocatalytic degradation of small organic molecules is almost unchanged, with Good stability and industrial application prospects.

Description

technical field [0001] The invention belongs to the technical field of photocatalysis, and in particular relates to a BiOI-M-B synergistic photocatalyst for photocatalytically degrading small organic molecules, a preparation method and application thereof. Background technique [0002] With the development of society, sewage treatment has become one of the major environmental problems that modern society urgently needs to solve. Nowadays, most rivers and lakes in our country are seriously polluted due to the uncontrolled discharge of industrial wastewater, which has a greater impact on environmental pollution and residents' health. In industrial wastewater, high-concentration organic wastewater discharged from industries such as dyes, pesticides, and leather accounts for a considerable proportion. In particular, dye products are resistant to photolysis, heat, and organisms, making them more difficult to treat. Therefore, the development of more practical and efficient water...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J27/128B01J27/06C02F1/30C02F101/34C02F101/38
CPCC02F1/30B01J27/06B01J27/128C02F2101/345C02F2101/40B01J35/39
Inventor 李永宇孙海杰陈建军黄振旭窦晓亚孙良玲张玉凤陈红霞刘艳艳曹亚芳
Owner ZHENGZHOU NORMAL UNIV
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