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Bismuth molybdate photocatalyst for heavy metal wastewater treatment and preparation method

A photocatalyst, bismuth molybdate technology, applied in the direction of physical/chemical process catalysts, chemical instruments and methods, nanotechnology for materials and surface science, etc., can solve the unsatisfactory effect of heavy metal reduction treatment and the long-lasting effect of heavy metal sewage , poor adsorption capacity of heavy metal ions, etc., to achieve the effects of strong catalytic reduction and degradation ability, improved photocatalytic activity, and high utilization rate of light energy

Inactive Publication Date: 2018-07-24
CHENDU NEW KELI CHEM SCI CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] It can be seen that the technical effect of the adsorption method for treating heavy metal sewage in the prior art is not long-lasting, and the adsorption capacity is limited. In addition, the traditional bismuth molybdate photocatalyst has poor adsorption capacity of heavy metal ions, and the utilization rate of light energy in sewage treatment is low. Poor activity, unsatisfactory effect of heavy metal reduction treatment, etc.

Method used

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  • Bismuth molybdate photocatalyst for heavy metal wastewater treatment and preparation method

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0031] a. Add bismuth nitrate pentahydrate and ammonium heptamolybdate tetrahydrate into the reaction kettle, add ethylene glycol, ultrasonically disperse, then add dimercaptopropanol, stir magnetically for 25 minutes, add ammonia water to adjust the pH value to 9, and continue stirring 8min, prepared reaction solution;

[0032] b. Put the reaction kettle with the reaction solution in the microwave reactor to generate bismuth molybdate. After the reaction is completed, cool to room temperature, take out the mixture for centrifugation, wash with distilled water and absolute ethanol, then dry and grind , prepared dimercapto propanol modified bismuth molybdate photocatalyst.

[0033] In step a, 20 parts by weight of bismuth nitrate pentahydrate, 28 parts by weight of ammonium heptamolybdate tetrahydrate, 46 parts by weight of ethylene glycol, 5 parts by weight of dimercaptopropanol, and 1 part by weight of ammonia water.

[0034] The reactor is a carbon steel reactor.

[0035] ...

Embodiment 2

[0037]a. Add bismuth nitrate pentahydrate and ammonium heptamolybdate tetrahydrate into the reaction kettle, add ethylene glycol, ultrasonically disperse, then add dimercaptopropanol, stir magnetically for 20 minutes, add ammonia water to adjust the pH value to 8.5, and continue stirring 10min, prepared reaction solution;

[0038] b. Put the reaction kettle with the reaction solution in the microwave reactor to generate bismuth molybdate. After the reaction is completed, cool to room temperature, take out the mixture for centrifugation, wash with distilled water and absolute ethanol, then dry and grind , to prepare dimercaptopropanol modified bismuth molybdate photocatalyst.

[0039] In step a, 18 parts by weight of bismuth nitrate pentahydrate, 25 parts by weight of ammonium heptamolybdate tetrahydrate, 53 parts by weight of ethylene glycol, 3.5 parts by weight of dimercaptopropanol, and 0.5 parts by weight of ammonia water.

[0040] The reaction kettle is a stainless steel ...

Embodiment 3

[0043] a. Add bismuth nitrate pentahydrate and ammonium heptamolybdate tetrahydrate into the reaction kettle, add ethylene glycol, ultrasonically disperse, then add dimercaptopropanol, stir magnetically for 30 minutes, add ammonia water to adjust the pH value to 9.5, and continue stirring 10min, prepared reaction solution;

[0044] b. Put the reaction kettle with the reaction solution in the microwave reactor to generate bismuth molybdate. After the reaction is completed, cool to room temperature, take out the mixture for centrifugation, wash with distilled water and absolute ethanol, then dry and grind , to prepare dimercaptopropanol modified bismuth molybdate photocatalyst.

[0045] In step a, 22 parts by weight of bismuth nitrate pentahydrate, 30 parts by weight of ammonium heptamolybdate tetrahydrate, 41 parts by weight of ethylene glycol, 6 parts by weight of dimercaptopropanol, and 1 part by weight of ammonia water.

[0046] The reactor is a glass-lined reactor.

[004...

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Abstract

The invention discloses a bismuth molybdate photocatalyst for heavy metal wastewater treatment and a preparation method. The bismuth molybdate photocatalyst is prepared by the following steps: a, adding bismuth nitrate pentahydrate, hepta-molybdate tetrahydrate, glycol ammonium and dimercaptopropanol to a reaction kettle, adjusting the pH value to be 8.5-9.5, and performing mixing and stirring toobtain reaction liquid; and b, putting the reaction kettle into a microwave reactor for reacting to obtain a dimercaptopropanol modified bismuth molybdate photocatalyst, namely the bismuth molybdate photocatalyst for heavy metal wastewater treatment. The method has the following beneficial effects that by utilizing a good adsorption property of dimercaptopropanol to heavy metal ion mercury, the modified molybdate photocatalyst has an adsorption capacity to heavy metal ion mercury and is high in light energy utilization ratio, good in photocatalysis activity, high in catalytic reduction and degradation capacity, widely suitable for treatment of toxic and harmful heavy metal ion mercury in water and broad in application prospect.

Description

technical field [0001] The invention relates to the field of heavy metal wastewater treatment, in particular to the preparation of photocatalysts, in particular to a bismuth molybdate photocatalyst for heavy metal wastewater treatment and a preparation method. Background technique [0002] Heavy metal pollution has become one of the important pollution problems facing the water environment. Heavy metal pollution mainly comes from industrial wastewater such as smelting, electrolysis, pesticides, medicines, paints, and pigments. Water polluted by heavy metals (lead, mercury, chromium, cadmium, nickel, etc.) can cause denaturation and inactivation of proteins and enzymes in human and animal cells, and accumulate in human organs, which can cause serious damage to the human body and even endanger life safety. At present, the conventional methods for removing heavy metal ions in wastewater mainly include adsorption and enrichment, physical separation and chemical redox. It is ver...

Claims

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Application Information

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IPC IPC(8): B01J23/31C02F1/30B82Y30/00B82Y40/00C02F101/20
CPCB82Y30/00B82Y40/00C02F1/30B01J23/002B01J23/31C02F2305/10C02F2101/20B01J35/39
Inventor 陈庆司文彬
Owner CHENDU NEW KELI CHEM SCI CO LTD
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