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Polyoxometallate-based industrial dye decoloring photocatalyst and preparation method thereof

A technology of polyoxometalates and catalysts, applied in chemical instruments and methods, physical/chemical process catalysts, organic compounds/hydrides/coordination complex catalysts, etc., can solve the problem of low heteropolyacid content and uncatalyzed Effect and other issues, to achieve the effect of expanding the wavelength of absorbed light, saving costs, and improving the catalytic range

Inactive Publication Date: 2011-09-07
NORTHEAST NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low content of heteropolyacid on the surface of the catalyst, a good catalytic effect was not obtained

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh K 5 [CuPW 11 o 39 (H 2 O)] 0.2g, (0.8mmol), silver acetate 0.07g (0.4mmol), and btp 0.09g (0.5mmol), dissolved in 12mL distilled water, stirred at room temperature for 30min. Use 1.0mol·L -1 The pH of the mixture was adjusted to 2 with HCl solution. The mixture was transferred to a Teflon-lined autoclave and crystallized at 180°C for 4 days. The reactor was cooled slowly to room temperature, and red blocky crystals were collected.

Embodiment 2

[0029] Weigh K 5 [MnPMo 11 o 39 (H 2 O)] 0.2g (0.8mmol), silver acetate 0.07g (0.4mmol), and btp 0.09g (0.5mmol), dissolved in 12mL distilled water, stirred at room temperature for 30min. Use 1.0mol·L -1 HCl solution adjusted the pH of the mixture to 3.2. The mixture was transferred to a Teflon-lined autoclave and crystallized at 160°C for 4 days. The reactor was cooled slowly to room temperature, and red blocky crystals were collected.

Embodiment 3

[0031] Weigh K 5 [MnPMo 11 o 39 (H 2 O) 2 ]0.2g (0.8mmol), copper acetate 0.08g (0.4mmol), and btp 0.09g (0.5mmol), dissolved in 12mL of distilled water, stirred at room temperature for 30min. Use 1.0mol·L -1 HCl solution adjusted the pH of the mixture to 4.2. The mixture was transferred to a Teflon-lined reactor and crystallized at 150 °C for 4 days. The reactor was slowly cooled to room temperature, and blue flaky crystals were collected.

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Abstract

The invention belongs to an inorganic chemical synthesis method, and particularly relates to a synthesis method of a metal complex, i.e. polyoxometallate hybridized compound which can be taken as a photocatalyst. A metal organic-inorganic compound is synthesized by taking a Keggin monosubstituted heteropolyanion or reduced heteropolyanion as a catalytically active substance and taking a transition metal complex as a fixed framework at certain temperature and under certain pH condition in an enclosed system. Due to the adoption of the prepared compound serving as a photocatalyst, the green decoloring rate of an industrial dye medium can reach 98 percent. The photocatalyst has slightly solubility in water, so that the photocatalyst can be separated conveniently and used repeatedly and has important meaning and potential application prospect during the treatment of industrial dye waste water.

Description

technical field [0001] The invention belongs to an inorganic chemical synthesis method, in particular to a preparation method of a metal complex-polyoxometalate hybrid compound which can be used as a photocatalyst. Background technique [0002] Polyoxometallic acids and their salts (POM) are a general term for a class of polymetallic oxygen clusters formed by transition metals such as molybdenum, tungsten, vanadium, and oxygen. Performance, magnetic properties, etc. have aroused widespread concern of scientists. Among them, the research on POM as acid catalyst and redox catalyst has achieved fruitful results, and several processes of POM as acid catalyst and redox catalyst have been applied in industrial production. [0003] Almost all known POMs have discrete structural units such as the Linquist anion M 6 o 19 2- , Keggin Anion XM 12 o 40 n- , Dawson Anion X 2 m 18 o 62 n- (M=Mo, W; X=P, Si) and their substituted and polymeric derivatives. In the past two decad...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34C02F1/30
Inventor 陈亚光张春晶
Owner NORTHEAST NORMAL UNIVERSITY
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