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Preparation and photo-catalytic application of Keggin type saturated phosphomolybdate and coating material of Keggin type saturated phosphomolybdate

A phosphomolybdate, coating material technology, applied in phosphorus compounds, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve problems such as water pollution and human health hazards

Active Publication Date: 2018-03-06
NORTHEAST DIANLI UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

If directly discharged into water bodies without any treatment, dye wastewater and experimental sewage will cause serious water pollution and endanger human health

Method used

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  • Preparation and photo-catalytic application of Keggin type saturated phosphomolybdate and coating material of Keggin type saturated phosphomolybdate
  • Preparation and photo-catalytic application of Keggin type saturated phosphomolybdate and coating material of Keggin type saturated phosphomolybdate
  • Preparation and photo-catalytic application of Keggin type saturated phosphomolybdate and coating material of Keggin type saturated phosphomolybdate

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Embodiment 1

[0060] Embodiment 1 is the preparation method of Keggin type saturated phosphomolybdate.

Embodiment 1-1

[0062] A preparation method of Keggin type saturated phosphomolybdate, comprising the following steps:

[0063] Weigh (1.65mmol) sodium molybdate and 0.12mmol concentrated phosphoric acid respectively, dissolve in 30mL deionized water and stir at 85°C for 30min, then add hydrochloric acid for acidification (pH 2-3). Then add 0.04g of cobalt chloride, 0.02g of o-phenanthroline and continue to stir at constant temperature, adjust the pH value to 7 with saturated sodium carbonate solution, and seal the mixed solution into a 15mL stainless steel reactor with a polytetrafluoroethylene liner. Reacted for 4.5 hours. Cool, centrifuge and dry to obtain saturated phosphomolybdate.

Embodiment 1-2

[0065] A preparation method of Keggin type saturated phosphomolybdate, comprising the following steps:

[0066] Weigh (1.8mmol) sodium molybdate and 0.12mmol concentrated phosphoric acid phosphoric acid respectively, dissolve in 30mL deionized water and stir at 80°C for 35min, then add hydrochloric acid for acidification (pH 2-3). Then add 0.04g of cobalt chloride, 0.02g of o-phenanthroline and continue stirring at constant temperature, adjust the pH value to 6.5 with saturated sodium carbonate solution, and seal the mixed solution into a 15mL stainless steel reactor with a polytetrafluoroethylene liner. React for 4 hours. Cool, centrifuge and dry to obtain saturated phosphomolybdate.

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Abstract

The invention discloses a preparation method of Keggin type saturated phosphomolybdate. The preparation method comprises the following steps: weighing sodium molybdate and phosphoric acid, dissolvingin deionized water and performing constant-temperature stirring after temperature rise; then adding hydrochloric acid for acidification; subsequently adding cobalt chloride and phenanthroline for continuous constant-temperature stirring, regulating a pH value to a neutral state, packaging mixed liquid in a reaction kettle and reacting for 4-5 hours at a high temperature; cooling, centrifuging anddrying; the difference between a preparation method of a coating material of the Keggin type saturated phosphomolybdate and the preparation method of the Keggin type saturated phosphomolybdate lies inthat the coating material is dissolved in a silver nano-particle solution instead of deionized water; through test, the photo-catalytic material has very good catalytic degradation effect on wastewater, in particular to methylene blue dye wastewater.

Description

technical field [0001] The invention relates to the preparation of photocatalytic materials for wastewater treatment, and belongs to the technical field of environmental protection materials, in particular to the preparation and photocatalytic application of a Keggin type saturated phosphomolybdate and its coating material. Background technique [0002] In the past forty years, polyoxometalates (POMs) have attracted much attention in the field of photocatalysis due to their diverse molecular structures and unique redox properties, and such catalysts are environmentally friendly, high conversion and Selective features. In recent years, although scholars have done a lot of research work on the photocatalytic degradation of organic pollutants with heteropolyacids, these works mainly focus on the 1:12 series saturated Keggin structure phosphotungstic acid (PW 12 ) and silicotungstic acid (SiW 12 ) photocatalytic degradation research under ultraviolet light conditions, there is...

Claims

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Application Information

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IPC IPC(8): C01B25/45B01J27/19B01J31/34C02F1/30C02F101/36C02F101/38
CPCC01B25/45C02F1/30B01J27/188B01J27/19B01J31/34C02F2101/38C02F2101/40C02F2101/36C02F2305/10B01J2531/845B01J35/39
Inventor 于海辉乔润张延林孔丽
Owner NORTHEAST DIANLI UNIVERSITY
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