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Bismuth/bismuth oxide/sodium tantalum oxide composite material for treating hexavalent chromium ion wastewater and preparation method of composite material

A technology of hexavalent chromium ion and composite material, which is applied in the field of bismuth/bismuth oxide/sodium tantalate composite material and its preparation, can solve problems such as low catalytic activity, and achieve the effects of simple process, increased cost and low cost

Active Publication Date: 2019-11-12
YANCHENG INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

This NaTaO obtained by doping 3 , just changing the NaTaO 3 electronic structure, but little significance for the improvement of catalytic activity

Method used

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  • Bismuth/bismuth oxide/sodium tantalum oxide composite material for treating hexavalent chromium ion wastewater and preparation method of composite material
  • Bismuth/bismuth oxide/sodium tantalum oxide composite material for treating hexavalent chromium ion wastewater and preparation method of composite material
  • Bismuth/bismuth oxide/sodium tantalum oxide composite material for treating hexavalent chromium ion wastewater and preparation method of composite material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] A preparation method for bismuth / bismuth oxide / sodium tantalate composite material for treating hexavalent chromium ion wastewater, said method comprising the following steps:

[0033] (1) Synthesis of NaTaO by hydrothermal synthesis 3 : Weigh 24 g of NaOH and then add 60 mL of deionized water to prepare a 10 mol / L NaOH solution, then add 0.2 g of Ta 2 o 5 (At this time NaOH and Ta 2 o 5 The mass ratio is 120:1) placed on a magnetic stirrer and stirred for 1 h to make it fully mixed, poured the mixed solution into the polytetrafluoroethylene lining and put it into a hydrothermal reaction kettle, at a temperature of 160°C After the reaction was completed, it was washed with deionized water for 3 times and ethanol for 2 times, and dried at 60°C to obtain NaTaO 3 ;

[0034] (2) Preparation of Bi / Bi by hydrothermal synthesis 2 o 3 / NaTaO 3 Photocatalyst: 41.2 mg of NaTaO 3 and 196 mg of Bi(NO 3 ) 3 ·5H 2 O (at this time Bi(NO 3 ) 3 ·5H 2 O and NaTaO 3 The ma...

Embodiment 2

[0037] A preparation method for bismuth / bismuth oxide / sodium tantalate composite material for treating hexavalent chromium ion wastewater, said method comprising the following steps:

[0038] (1) Synthesis of NaTaO by hydrothermal synthesis 3 : Weigh 20g of NaOH and then add 60 mL of deionized water to prepare a 10 mol / L NaOH solution, then add 0.2g of Ta 2 o 5 (At this time NaOH and Ta 2 o 5 The mass ratio is 100:1) placed on a magnetic stirrer and stirred for 1 h to make it fully mixed, poured the mixed solution into the liner of polytetrafluoroethylene and put it into a hydrothermal reaction kettle, at a temperature of 160 °C After the reaction was completed, it was washed with deionized water for 3 times and ethanol for 2 times, and dried at 60°C to obtain NaTaO 3 .

[0039] (2) Preparation of Bi / Bi by hydrothermal synthesis 2 o 3 / NaTaO 3 Composite material: 41.2 mg of NaTaO 3 and 164.8mg of Bi(NO 3 ) 3 ·5H 2 O (at this time Bi(NO 3 ) 3 ·5H 2 O and NaTaO ...

Embodiment 3

[0042] A preparation method for bismuth / bismuth oxide / sodium tantalate composite material for treating hexavalent chromium ion wastewater, said method comprising the following steps:

[0043] (1) Synthesis of NaTaO by hydrothermal synthesis 3 : Weigh 28g of NaOH and then add 60 mL of deionized water to prepare a 10 mol / L NaOH solution, then add 0.2g of Ta 2 o 5 (At this time NaOH and Ta 2 o 5 The mass ratio is 140:1) placed on a magnetic stirrer and stirred for 1 h to make it fully mixed. Pour the mixed solution into a polytetrafluoroethylene lining and put it in a hydrothermal reaction kettle. After the reaction was completed, it was washed with deionized water for 3 times and ethanol for 2 times, and dried at 60°C to obtain NaTaO 3 .

[0044] (2) Preparation of Bi / Bi by hydrothermal synthesis 2 o 3 / NaTaO 3 Composite material: 41.2 mg of NaTaO 3 and 247.2mg of Bi(NO 3 ) 3 ·5H 2 O (at this time Bi(NO 3 ) 3 ·5H 2 O and NaTaO 3 The mass ratio of 6:1) was added ...

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Abstract

The invention relates to a bismuth / bismuth oxide / sodium tantalum oxide composite material for treating hexavalent chromium ion wastewater and a preparation method of the composite material, and belongs to the field of composite materials. The method includes the following steps that Ta2O5 is added into a NaOH aqueous solution and mixed evenly, then a hydrothermal reaction is conducted to obtain NaTaO3, then the NaTaO3 and Bi(NO3)3.5H2O are added into glycol and mixed evenly for a hydrothermal reaction, and then precipitation is washed and dried successively to obtain the Bi / Bi2O3 / NaTaO3 composite material. According to the bismuth / bismuth oxide / sodium tantalum oxide composite material, Bi and Bi2O3 are loaded onto sodium tantalum oxide to improve the performance of NaTaO3 in treating the wastewater containing hexavalent chromium (Cr6<+>), and the advantages that the preparation method is simple, precious metal and rare earth ions do not need to be added, the catalyst cost is low, and the treating efficiency for the Cr6<+> is high are achieved.

Description

technical field [0001] The invention belongs to the technical field of composite materials, in particular to a bismuth / bismuth oxide / sodium tantalate composite material for treating hexavalent chromium ion wastewater and a preparation method thereof. Background technique [0002] About 200,000 to 300,000 tons of chromium slag are discharged annually in the domestic metallurgical and chemical industries. The harmful components in chromium slag are mainly hexavalent chromium ions such as soluble sodium chromate and acid-soluble calcium chromate (Cr 6+ ). Because the discharge of these hexavalent chromium constitutes a pollution hazard to the ecological environment. When chromium slag is piled up in the open air, a large amount of hexavalent chromium ions dissolve, lose, and infiltrate into the surface with rainwater after long-term rainwater, thereby polluting groundwater, rivers and lakes, and endangering farmland, aquatic products and human health . Cr 6+ Ingestion po...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/648C02F1/30C02F101/22
CPCB01J23/6486C02F1/30C02F2101/22C02F2305/10B01J35/39
Inventor 奚新国孟承启董鹏玉程婷陈小卫
Owner YANCHENG INST OF TECH
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