Cadmium-doped bismuth molybdate visible-light-induced photocatalyst and preparation method and application of cadmium-doped bismuth molybdate visible-light-induced photocatalyst

A catalyst, visible light technology, applied in the direction of catalyst activation/preparation, chemical instruments and methods, physical/chemical process catalysts, etc. problems such as low catalytic performance, to achieve good activity stability, high practical value and application prospects, and the effect of convenient separation and treatment

Inactive Publication Date: 2013-07-24
FUZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, the commonly used TiO2-based photocatalysts have the disadvantages of low quantum efficiency and low solar energy utilization.
In response to these problems, researchers have carried out a lot of modification research on TiO2, including various metal and non-metal element doping, noble metal surface deposition, semiconductor recombination, dye sensitization, etc., and achieved certain results. However, the two major problems of quantum efficiency and solar energy utilization have not been fundamentally solved, thus prompting researchers to further turn their attention to non-TiO2 series compounds and try to develop new and efficient Photocatalysts and Broadening the Response Range of Photocatalysts
[0004] We reported in our previous work that bismuth molybdate can degrade organic dyes in water under visible light irradiation, but the conduction band potential of bismuth molybdate is insufficient, and the photogenerated electrons and space The holes are easy to recombine, resulting in low photocatalytic performance of bismuth molybdate. In recent years, metal ion doping has attracted widespread attention.

Method used

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  • Cadmium-doped bismuth molybdate visible-light-induced photocatalyst and preparation method and application of cadmium-doped bismuth molybdate visible-light-induced photocatalyst
  • Cadmium-doped bismuth molybdate visible-light-induced photocatalyst and preparation method and application of cadmium-doped bismuth molybdate visible-light-induced photocatalyst
  • Cadmium-doped bismuth molybdate visible-light-induced photocatalyst and preparation method and application of cadmium-doped bismuth molybdate visible-light-induced photocatalyst

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] 3.1813 g Bi(NO 3 ) 3 ·5H 2 O and 0.5790 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to the polytetrafluoroethylene reaction kettle, and 25 ml of ethylene glycol solvent was added, and the reaction kettle was placed on a magnetic stirrer and stirred for 30 min, and the pH was adjusted with ammonia water with a mass fraction of about 5% while stirring. 9. After continuing to stir for 30 minutes, put the reactor in a ceramic lining and place it in a microwave reactor with a power of 1000 W, and react at 160°C for 1.5 hours. After the reaction is completed and cooled to room temperature, remove the The mixture was taken out and centrifuged, and the obtained pale yellow precipitate was washed several times with distilled water and absolute ethanol, dried at 60° C., and then ground to obtain a visible photocatalyst of bismuth molybdate.

Embodiment 2

[0022] 3.1018 g Bi(NO 3 ) 3 ·5H 2 O and 0.5790 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to the reaction kettle of polytetrafluoroethylene, 25 ml of ethylene glycol solvent was added, and then 0.0374 g of CdCl was added to the reaction kettle 2 2.5H 2 O, place the reaction kettle on a magnetic stirrer and stir for 30 minutes, adjust the pH to about 9 with ammonia water with a mass fraction of about 5% while stirring, continue stirring for 30 minutes, put the reaction kettle in a ceramic outer lining and Place in a microwave reactor with a power of 1000 W, and react at 160°C for 1.5 h. After the reaction is completed and cooled to room temperature, the mixture in the reactor is taken out and centrifuged, and the obtained pale yellow precipitate is washed with distilled water and absolute ethanol for several After drying at 60°C, grinding was done to obtain 2.5% Cd-doped bismuth molybdate visible photocatalyst.

Embodiment 3

[0024] 3.0222 g Bi(NO 3 ) 3 ·5H 2 O and 0.5790 g (NH 4 ) 6 Mo 7 o 24 4H 2 O was added to the reaction kettle of polytetrafluoroethylene, 25 ml of ethylene glycol solvent was added, and then 0.0749 g of CdCl was added to the reaction kettle 2 2.5H 2 O, place the reaction kettle on a magnetic stirrer and stir for 30 minutes, adjust the pH to about 9 with ammonia water with a mass fraction of about 5% while stirring, and continue stirring for 30 minutes, then put the reaction kettle in a ceramic outer lining and Place in a microwave reactor with a power of 1000 W, and react at 160°C for 1.5 h. After the reaction is completed and cooled to room temperature, the mixture in the reactor is taken out and centrifuged, and the obtained pale yellow precipitate is washed with distilled water and absolute ethanol for several After drying at 60°C, grinding was done to obtain 5% Cd-doped bismuth molybdate visible photocatalyst.

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Abstract

The invention discloses a cadmium-doped bismuth molybdate visible-light-induced photocatalyst, a preparation method and application of the cadmium-doped bismuth molybdate visible-light-induced photocatalyst, and belongs to the technical field of material preparation and environmental pollution improvement. The preparation method comprises the following steps of: introducing Cd into a bismuth molybdate crystal lattice in a microwave-solvothermal way; and then synthesizing to obtain a metallic-ion-doped visible-light-induced photocatalyst. The photocatalyst can respond to visible light, thus an organic pollutant of a dye in wastewater can be efficiently degraded; and the performed microwave way has the characteristics of being efficient, convenient and fast, and can quickly synthesize such catalyst. The preparation method is simple, low in cost and high in yield, meets the actual production demand, and has relatively high application potential.

Description

technical field [0001] The invention belongs to the technical field of material preparation and environmental pollution control, and specifically relates to a cadmium-doped bismuth molybdate visible light catalyst and a preparation method and application thereof. Background technique [0002] With the development of the printing and dyeing industry, organic pollutants such as dyes and dye solvents have become a major class of environmental pollutants. Traditional dye sewage treatment methods only use physical methods to transfer organic matter, but the dye molecules themselves do not decompose, so these degradation methods cannot achieve real removal; The requirements are relatively high, and biochemical methods are powerless for organically polluted wastewater with high toxicity, difficult biodegradation, and complex components. Therefore, it is imminent to explore a more advanced and effective wastewater treatment process. [0003] Photocatalytic technology is an advance...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J23/31B01J37/34C02F1/30
CPCY02W10/37
Inventor 毕进红陈梦莹李沥梁诗景刘明华
Owner FUZHOU UNIV
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