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Water treatment photocatalyst and preparation method thereof

A photocatalyst and water treatment technology, applied in physical/chemical process catalysts, chemical instruments and methods, water treatment of special compounds, etc., can solve problems such as easy self-corrosion, silver phosphate instability, etc., to avoid self-instability, structure Stable properties and excellent adsorption/decomposition performance

Inactive Publication Date: 2019-07-12
无锡米尔环保科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, silver phosphate cannot reduce water to hydrogen, and silver phosphate itself is unstable, and it is easy to self-erode in photocatalysis

Method used

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  • Water treatment photocatalyst and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Embodiment 1: A photocatalyst for water treatment, specifically supporting silver tantalum niobate sodium / silver molybdate / modified silver phosphate composite material particles in spherical porous hydroxyapatite.

[0019] Its preparation method comprises the following steps:

[0020] (1) Add soluble phosphate into deionized water, ultrasonically disperse, add silver acetate solution and stir for 0.5h to obtain mixed solution A; then add a small amount of nickel-iron alloy to mixed solution A, continue stirring for 1.5h, and vacuum filter , and washed with deionized water, and then the filtered solid was dried to obtain modified silver phosphate for subsequent use; wherein, the nickel-iron alloy adopts FeNi 2 0 powder, the mass ratio of the added nickel-iron alloy to the mixed solution A is 1:170;

[0021] (2) After mixing sodium tantalum niobate, silver molybdate, and modified silver phosphate in a mass ratio of 1.3:1.7:0.6, add them to deionized water, ultrasonically...

Embodiment 2

[0023] Embodiment 2: a kind of preparation method of water treatment photocatalyst comprises the following steps:

[0024] (1) Add soluble phosphate into deionized water, ultrasonically disperse, add silver acetate solution and stir for 0.5h to obtain mixed solution A; then add a small amount of nickel-iron alloy to mixed solution A, continue stirring for 1.8h, and vacuum filter , and washed with deionized water, and then the filtered solid was dried to obtain modified silver phosphate for subsequent use; wherein, the nickel-iron alloy adopts FeNi 2 0 powder, the mass ratio of the added nickel-iron alloy to the mixed solution A is 1:190;

[0025] (2) After mixing sodium tantalum niobate, silver molybdate, and modified silver phosphate in a mass ratio of 2:2.2:1.1, add them to deionized water, ultrasonically disperse, mix and stir for 2 hours, and then heat at 90 degrees Dry under normal pressure, then place the dried mixture in a crucible furnace and roast for 5 hours to obta...

Embodiment 3

[0027] Embodiment 3: a kind of preparation method of water treatment photocatalyst comprises the following steps:

[0028] (1) Add soluble phosphate into deionized water, ultrasonically disperse, add silver acetate solution and stir for 0.5h to obtain mixed solution A; then add a small amount of nickel-iron alloy to mixed solution A, continue stirring for 2 hours, and vacuum filter, And wash with deionized water, and then dry the filtered solid to obtain modified silver phosphate for subsequent use; wherein, the nickel-iron alloy adopts FeNi 2 0 powder, the mass ratio of the added nickel-iron alloy to the mixed solution A is 1:250;

[0029] (2) After mixing sodium tantalum niobate, silver molybdate, and modified silver phosphate in a mass ratio of 2.2:3.4:1.3, add them to deionized water, ultrasonically disperse, mix and stir for 3 hours, and then Dry under normal pressure, then place the dried mixture in a crucible furnace and roast for 8 hours to obtain a silver tantalum ni...

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Abstract

The invention discloses a water treatment photocatalyst and a preparation method thereof. The water treatment photocatalyst is formed by loading silver sodium niobate tantalate / silver molybdate / modified silver phosphate composite particles in spherical porous hydroxyapatite. The method comprises the following steps: compounding silver sodium niobate tantalate, silver molybdate and modified silverphosphate to prepare a photocatalyst, and then combining hydroxyapatite as a matrix material with the photocatalyst. The functions of the matrix material and the photocatalyst are not hindered; and the hydroxyapatite as the matrix material is spherical after being molded, and the spherical hydroxyapatite has stable structure and properties, has a good adsorption / decomposition performance to environmental pollutants, and can treat the environmental pollutants without applying new load to the environment.

Description

technical field [0001] The invention relates to the technical field of sewage treatment, in particular to a water treatment photocatalyst and a preparation method thereof. Background technique [0002] Water treatment methods include physical treatment and chemical treatment. Traditional water treatment methods have problems such as low efficiency, high cost, and secondary pollution, and sewage treatment has not been well resolved. The development and application of nanotechnology is likely to completely solve this problem. [0003] Photocatalytic technology is a basic nanotechnology born in the 1970s. People usually use the popular term photocatalyst to refer to photocatalyst. In 1972, A.Fujishima and K.Honda worked on n-type semiconductor TiO 2 Photocatalytic decomposition of water found on electrode, TiO 2 It has high oxidation activity, good chemical stability, non-toxicity to human body, low cost, no pollution, and wide application range, so it has received the most...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/195C02F1/30
CPCB01J27/195C02F1/30C02F2305/10B01J35/39
Inventor 何俊
Owner 无锡米尔环保科技有限公司
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