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Photocatalyst for treating organic wastewater, and preparation method thereof

A photocatalyst and organic wastewater technology, which is applied in the direction of catalyst activation/preparation, physical/chemical process catalysts, chemical instruments and methods, etc., can solve the problems of low solar energy utilization rate, and achieve high catalytic degradation efficiency, efficient degradation, and powder highly active effect

Active Publication Date: 2019-09-20
HUBEI UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However TiO 2 The band gap is wide, and it can only absorb ultraviolet light of λ≤387nm, and the utilization rate of solar energy is low.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] 1. Preparation of catalyst powder: weigh 0.069g lithium nitrate (ie 1.0×10 -3 mol), weigh 2.910g nickel nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 2.910g cobalt nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 1.320g diammonium hydrogen phosphate (ie 1.1×10 -2 mol), lithium nitrate, nickel nitrate hexahydrate, cobalt nitrate hexahydrate and diammonium hydrogen phosphate were completely dissolved in 50mL of water at normal temperature and pressure, and 8.91mL of tetraethyl silicate was added dropwise under stirring. After the dropwise addition, Continue stirring until a gel forms. Then dry the gel at 140°C and grind it into powder. Put the obtained gel powder into a muffle furnace and calcinate at 400°C for 15 hours to obtain the general formula Li 0.1 NiCoPSi 4 o 12.6 black catalyst powder.

[0024] 2. Use of catalyst powder: Add 40 mL of methylene blue dye organic wastewater with a concentration of 10.0 mg / L into a cylindrical quartz photocatalytic reactor, add 4...

Embodiment 2

[0026] 1. Preparation of catalyst powder: weigh 0.069g lithium nitrate (ie 1.0×10 -3 mol), weigh 2.910g nickel nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 2.910g cobalt nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 1.320g diammonium hydrogen phosphate (ie 1.1×10 -2 mol), lithium nitrate, nickel nitrate hexahydrate, cobalt nitrate hexahydrate and diammonium hydrogen phosphate were completely dissolved in 50mL of water at normal temperature and pressure, and 8.91mL of tetraethyl silicate was added dropwise under stirring. After the dropwise addition, Continue stirring until a gel forms. Then dry the gel at 130°C and grind it into powder. Put the obtained gel powder into a muffle furnace and calcinate at 550°C for 15 hours to obtain the general formula Li 0.1 NiCoPSi 4 o 12.6 black catalyst powder.

[0027] 2. Use of catalyst powder: Add 40 mL of methylene blue dye organic wastewater with a concentration of 10.0 mg / L into a cylindrical quartz photocatalytic reactor, add 4...

Embodiment 3

[0029] 1. Preparation of catalyst powder: weigh 0.069g lithium nitrate (ie 1.0×10 -3 mol), weigh 2.910g nickel nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 2.910g cobalt nitrate hexahydrate (ie 1.0×10 -2 mol), weigh 1.320g diammonium hydrogen phosphate (ie 1.1×10 -2 mol), lithium nitrate, nickel nitrate hexahydrate, cobalt nitrate hexahydrate and diammonium hydrogen phosphate were completely dissolved in 50mL of water at normal temperature and pressure, and 8.91mL of tetraethyl silicate was added dropwise under stirring. After the dropwise addition, Continue stirring until a gel forms. Then dry the gel at 120°C and grind it into powder. Put the obtained gel powder into a muffle furnace and calcinate at 750°C for 10 hours to obtain the general formula Li 0.1 NiCoPSi 4 o 12.6 black catalyst powder.

[0030] 2. Use of catalyst powder: Add 40 mL of methylene blue dye organic wastewater with a concentration of 10.0 mg / L into a cylindrical quartz photocatalytic reactor, add 4...

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PUM

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Abstract

The invention discloses a photocatalyst for treating organic wastewater, and a preparation method thereof. The general formula of the photocatalyst is Li0.1NiCoPSi4O12.6. The method comprises the following steps: completely dissolving raw materials comprising lithium nitrate, nickel sulfate, cobalt nitrate and diammonium hydrogen phosphate in water at normal temperature under normal pressure, dropwise adding tetraethyl silicate while stirring, continuously performing stirring after the drop-by-drop addition is finished until a gel is formed, drying and grinding the gel to form a powder, and calcining the powder to obtain the catalyst powder with the general formula of Li0.1NiCoPSi4O12.6. The obtained catalyst can effectively degrade the methylene blue dye in wastewater under light irradiation. The photocatalyst of the invention has the advantages of simple preparation method, high catalytic degradation efficiency at normal temperature under normal pressure, simple process flow, no secondary pollution, low operating cost and high practical application values.

Description

technical field [0001] The invention relates to the technical field of preparation of inorganic functional materials, in particular to a photocatalyst for treating organic wastewater and a preparation method thereof. Background technique [0002] At present, organic dye wastewater has become one of the main sources of water pollution. The wastewater has the characteristics of large water volume, high concentration, complex composition, deep color and refractory degradation. Most dyes are toxic, carcinogenic, teratogenic and mutagenic. Methylene blue is an important organic chemical synthetic cationic dye with a wide range of industrial applications. For example, it can be applied to the dyeing of hemp, silk fabrics, paper, bamboo and wood, the dyeing of biological and bacterial tissues, and the manufacture of ink and color lakes. The wide application of methylene blue in industry has resulted in the serious pollution of wastewater containing methylene blue dye. At presen...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/185B01J37/08C02F1/30C02F101/30
CPCB01J27/1853B01J37/0036B01J37/082C02F1/30C02F2101/308C02F2305/10B01J35/39Y02W10/37
Inventor 周国华
Owner HUBEI UNIV OF TECH