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Novel bismuthate iodide, preparation method thereof and application of bismuthate iodide in fluorescence and light degradation

A technology of bismuth iodide and bismuth salt, which is applied in the field of hexaiodobismuth acid benzylpyridinium salt and new bismuth halide salt, can solve the problems of invisibility and low utilization rate of visible light, and achieve easy operation, Good photodegradation effect, beneficial to industrial promotion

Active Publication Date: 2020-12-29
SOUTH CHINA AGRI UNIV
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Problems solved by technology

In recent years, the potential application of halobismuthates (III) as photocatalysts and optical materials has attracted widespread attention in the field of organic-inorganic hybrid compounds, but the existing halobismuthates still have a wide band gap, Low utilization rate of visible light, invisible under ultraviolet light, etc. need to be solved urgently to improve application value

Method used

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  • Novel bismuthate iodide, preparation method thereof and application of bismuthate iodide in fluorescence and light degradation
  • Novel bismuthate iodide, preparation method thereof and application of bismuthate iodide in fluorescence and light degradation
  • Novel bismuthate iodide, preparation method thereof and application of bismuthate iodide in fluorescence and light degradation

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Embodiment 1

[0027] A kind of novel bismuth iodide salt, preparation method comprises the following steps:

[0028] (1) Weigh 0.02mol of benzyl bromide and 0.02mol of pyridine into a 100 mL ground-mouth Erlenmeyer flask, add 30 mL of methanol to dissolve, stir and reflux at 65-70°C for 20 hours, and wash with ether after rotary evaporation to obtain a yellow oil It is the target product [BzPy]Br, and the yield is 87.1%.

[0029] (2) Take 3mmol of the obtained [BzPy]Br in a conical flask, add 20mL of acetonitrile to dissolve; take 1mmol of BiI 3 , into a beaker, add 5mL 45% concentrated iodic acid to dissolve; slowly pour the solution in the beaker into the Erlenmeyer flask, heat, stir and reflux at 85°C for 2 hours, put it in the refrigerator (about -18°C) and freeze and crystallize for 12 hours Finally, red crystals are obtained, namely hexaiodobismuth acid·benzylpyridinium salt [BzPy] 3 [BiI 6 ], and its productive rate is 82.4%.

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Abstract

The invention belongs to the technical field of environment-friendly functional materials, and particularly relates to novel halogenated bismuthate which is a compound composed of bismuth hexaiodide anions and benzyl pyridine cations, and a preparation method of the halogenated bismuthate comprises the following steps: taking a certain amount of benzyl bromide and pyridine, adding a proper amountof solvent, mixing, dissolving, stirring, refluxing, evaporating, concentrating, washing with diethyl ether, to obtain benzyl pyridinium bromide; taking BiI3 and dissolving the BiI3 in a proper amountof concentrated iodic acid, taking a certain amount of benzyl pyridinium bromide and dissolving in a proper amount of solvent, mixing the two solutions, stirring and refluxing, obtaining clear filtrate and performing subjected to freezing crystallization, and obtaining the novel bismuthate iodide. The novel halogenated bismuthate disclosed by the invention emits strong orange light under the irradiation of 365nm ultraviolet light, rapidly degrades rhodamine B and methyl orange under visible light, and has very good cyclic degradation efficiency. The invention also provides a preparation method of the novel bismuthate iodide, and the method has the advantages of high yield, cost saving, easy operation, and facilitation of industrial production.

Description

technical field [0001] The invention belongs to the technical field of environmental protection functional materials, and in particular relates to a novel bismuth halide salt, that is, hexaiodobismuthic acid benzylpyridinium salt, its preparation method and its application in fluorescence and photodegradation. Background technique [0002] With the continuous advancement of industrialization and urbanization, pollution problems caused by waste gas, organic matter, polymers and biomass have become increasingly serious. Among them, some artificially synthesized organic pollutants have high toxicity despite their low concentration in the environment, so the removal of organic pollutants has also received extensive attention. In recent decades, technologies for the removal of organic dyes from wastewater have also been continuously developed, such as adsorption, photodegradation, biodegradation, and ozonation. Among them, photocatalytic technology can completely mineralize and ...

Claims

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Application Information

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IPC IPC(8): C07D213/20C09K11/06B01J31/02B01J27/08C02F1/30C02F101/30C02F101/34C02F101/36C02F101/38
CPCC07D213/20C09K11/06B01J31/0244B01J27/08C02F1/30C07B2200/13C09K2211/1029C02F2101/36C02F2101/38C02F2101/34C02F2101/308C02F2101/40C02F2305/10B01J35/39
Inventor 倪春林张静刘维陈锶寒陈丛丛陈克来徐奕琳
Owner SOUTH CHINA AGRI UNIV
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