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Photocatalyst composition CNB-BiVO4 and preparation method and application thereof

A photocatalyst and composition technology, applied in chemical instruments and methods, water pollutants, light water/sewage treatment, etc., can solve the problem of high cost of raw materials, limited increase in photocatalytic efficiency of modified catalysts, and inability to meet industrial requirements, etc. question

Inactive Publication Date: 2015-12-30
FUYANG NORMAL UNIVERSITY
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0007] However, the above-mentioned preparation method is not only complicated in operation and high in cost of raw materials, but also the degree of increase in the photocatalytic efficiency of the modified catalyst is limited, which cannot meet the industrial requirements.

Method used

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  • Photocatalyst composition CNB-BiVO4 and preparation method and application thereof
  • Photocatalyst composition CNB-BiVO4 and preparation method and application thereof
  • Photocatalyst composition CNB-BiVO4 and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0079] (1) Weigh 10.0g of urea and 5.0mg of sodium tetraphenylborate, put them into a clean and dry small beaker, add 20mL of distilled water, mix and dissolve evenly, and then put the small beaker into an 80°C water bath (preheated to 80°C), evaporate the water to dryness to obtain a solid, move the obtained solid into a crucible, put it into a muffle furnace, and calcinate at 550°C for 2 hours to obtain a CNB sample;

[0080] (2) Weigh 19.4gBi(NO 3 ) 3 ·5H 2 O and 4.68gNH 4 VO 3 Dissolve in 500mL nitric acid solution (2mol / L), mix well, transfer the mixed solution into a 1000mL beaker to obtain an orange solution, then add 7.5g urea to the mixed solution to adjust the pH of the mixed solution value to 7.5,

[0081] The mixed solution was placed in an oil bath magnetic stirrer at 90°C and fully stirred for 24 hours. A bright yellow crystalline solid gradually formed. After the reaction was complete, the resulting solid was suction filtered, and the solid obtained by suct...

Embodiment 2

[0084] The method used in Examples 2-5 is similar to that of Example 1, the only difference is that in step (3), the CNB powder prepared in step 1 and the BiVO powder prepared in step 2 are weighed 4 The weights of the powders were respectively 0.2g and 0.8g (Example 2), 0.5g and 0.5g (Example 3), 0.8g and 0.2g (Example 4), 0.9g and 0.1g (Example 5), respectively.

experiment example 1

[0091] Infrared Spectrometry of Experimental Example 1 Sample

[0092] Infrared spectroscopy is used to measure that when a sample is irradiated by infrared light of continuously changing frequency, the molecule absorbs radiation of certain frequencies, and the change of dipole moment is caused by its vibration or bending motion, which causes the energy level to change from the ground state to the excited state. Transition, thus forming molecular absorption spectrum.

[0093] The samples used in this experimental example are the samples prepared in Example 1, Example 2, Example 3, Example 5, Comparative Example 1 and Comparative Example 2.

[0094] Operation method: Take the above catalyst sample, add sufficient amount of potassium bromide white powder, fully grind it with an agate mortar until it is evenly mixed, then move it into a mold, use a tablet press to manually press the catalyst into a transparent sheet, and measure it on an infrared spectrometer , set the paramet...

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Abstract

The invention provides a photocatalyst composition CNB-BiVO4. According to the photocatalyst composition CNB-BiVO4, nitrogen-containing organic matter serves as a raw material, boron-doped graphite-phase carbon nitride (abbreviated as CNB) is prepared through a hydrothermal method, a boron-containing compound and a vanadium-containing compound serve as raw materials and react in an acidic solution, then solids obtained through reaction are calcined to obtain BiVO4, and then the prepared CNB and the BiVO4 are mixed and prepared into the photocatalyst composition CNB-BiVO4 through a hydrothermal method. The prepared photocatalyst composition has a good catalytic degradation effect on organic dye and particularly azo type organic dye under ultraviolet light and can be used for treating sewage containing the organic dye.

Description

technical field [0001] The invention relates to a photocatalyst composition for treating organic dye sewage and a preparation method thereof, in particular to a photocatalyst composition CNB-BiVO 4 and its preparation method. Background technique [0002] Graphite phase carbon nitride, with its outstanding advantages of high photocatalytic activity, good stability, cheap raw materials, especially the absence of metals, makes it a new type of photocatalytic material. However, single-phase g-C 3 N 4 Catalysts usually have unsatisfactory photocatalytic performance due to low quantum efficiency. In addition, g-C 3 N 4 The high photogenerated electron-hole recombination rate of the material leads to low catalytic efficiency, which limits its application in photocatalysis. [0003] To improve g-C 3 N 4 In recent years, many modification methods have been studied. [0004] One is to use non-metallic elements to g-C 3 N 4 For modification, the non-metallic elements include...

Claims

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Application Information

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IPC IPC(8): B01J27/24C02F1/32C02F101/38
Inventor 崔玉民李慧泉苗慧师瑞娟
Owner FUYANG NORMAL UNIVERSITY
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