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Organic-inorganic hybrid lead iodide visible light catalytic material and preparation method thereof

A catalytic material and visible light technology, applied in organic compound/hydride/coordination complex catalysts, chemical instruments and methods, physical/chemical process catalysts, etc., can solve the problem of poor photochemical stability and low photocatalytic efficiency of lead iodide, etc. problem, to achieve the effect of small band gap and stable visible light catalytic performance

Active Publication Date: 2021-11-02
JINING UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] Aiming at the key problems of low photocatalytic efficiency and poor photochemical stability of lead iodide, the invention provides an organic-inorganic hybrid lead iodide visible light catalytic material and a preparation method thereof

Method used

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  • Organic-inorganic hybrid lead iodide visible light catalytic material and preparation method thereof
  • Organic-inorganic hybrid lead iodide visible light catalytic material and preparation method thereof
  • Organic-inorganic hybrid lead iodide visible light catalytic material and preparation method thereof

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Embodiment 1

[0026] The preparation method of the organic-inorganic hybrid lead iodide visible light catalytic material of the present invention comprises the following steps:

[0027] i) Weigh the raw material Fe(SO 4 )·7H 2 O, 2,2-bipyridine, PbI 2 and KI, add 0.5mLHI, 4mLN.N-dimethylformamide and 1mLH according to the molar ratio of 2:6:8:2 2 O in the mixed solution, then put the mixture into the reaction kettle and seal;

[0028] ii) Put the sealed hydrothermal kettle into an electric blast drying oven with programmed temperature control, heat it to 140°C for 5 hours, then react at a constant temperature of 140°C for 6 days, drop to room temperature, and the synthesis reaction ends;

[0029] iii) Open the reaction kettle, carry out suction filtration to the solid-liquid mixture, and dry the material obtained by suction filtration to obtain a black-red block crystal material, which is the target compound [Fe(2.2-bipy) 3 ] 2 Pb 8 I21 . After washing with distilled water and ethano...

Embodiment 2

[0031] The preparation method of the organic-inorganic hybrid lead iodide visible light catalytic material of the present invention comprises the following steps:

[0032] i) Weigh the raw material Fe(SO 4 )·7H 2 O, 2,2-bipyridine, PbI 2 and KI, add 0.5mLHI, 4mLN.N-dimethylformamide and 1mLH according to the molar ratio of 2.5:6.5:8.5:2.5 2 O in the mixed solution, then put the mixture into the reaction kettle and seal;

[0033] ii) Put the sealed hydrothermal kettle into an electric blast drying oven with programmed temperature control, heat it up to 140°C for 5 hours, then react at a constant temperature of 160°C for 8 days, drop to room temperature, and the synthesis reaction ends;

[0034] iii) Open the reaction kettle, carry out suction filtration to the solid-liquid mixture, and dry the material obtained by suction filtration to obtain a black-red block crystal material, which is the target compound [Fe(2.2-bipy) 3 ] 2 Pb 8 I 21 . After washing with distilled wat...

Embodiment 3

[0039] Figure 4 Shown is the compound [Fe(2.2-bipy) 3 ] 2 Pb 8 I 21 Absorbance curve of RhB under catalysis. 30mg [Fe(2.2-bipy) 3 ] 2 Pb 8 I 21 The sample is dispersed in a 30ml container with a concentration of 1×10 -5 In the quartz reactor of mol / L Rhodamine B (RhB) solution, after dispersing in the ultrasonic cleaner for 30 minutes, put it into the dark room, and stir for 10 hours under the condition of no light, to ensure that RhB and the prepared photocatalytic material powder reach Adsorption-desorption equilibrium. After the adsorption-desorption equilibrium was reached, the photodegradation ability of the photocatalytic material on RhB was measured using a 500W xenon lamp as a visible light source. Take out 4mL test solution every 10min for analysis, stop after 60min of reaction. The concentration change of RhB was obtained by measuring the absorbance of the solution with an ultraviolet-visible spectrophotometer. Compound [Fe(2.2-bipy) 3 ] 2 Pb 8 I 21 ...

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Abstract

The organic-inorganic hybrid lead iodide visible light catalytic material provided by the invention has the molecular formula [Fe(2.2-bipy) 3 ] 2 Pb 8 I 21 , using Fe(SO 4 ) 7H 2 O, 2,2-bipyridine, PbI 2 and KI, according to the molar ratio of (2~2.5):(6~6.5):(8~8.5):(2~2.5), add to 0.5~1mL HI, 4~5mL N.N-dimethylformamide and 1~2mL H 2 In the mixed solution of O, then put the mixture into the reaction kettle and seal it; put the sealed reaction kettle into the drying oven, heat it to 140 ° C after 5 hours, and then react at a constant temperature of 140 to 160 ° C for 6 to 8 days, Drop to room temperature, filter, wash and air dry. In the present invention, transition metal complexes are introduced as cations and templates for the first time, and organic-inorganic hybrid lead iodide compounds are synthesized. The compounds can effectively absorb visible light in sunlight, and have efficient and stable visible light catalytic performance. It can decompose organic pollutants such as Rhodamine B.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to an organic-inorganic hybrid lead iodide visible light catalytic material and a preparation method thereof. Background technique [0002] Since the beginning of the 21st century, with the increasingly serious global environmental pollution and energy crisis, as well as widespread concern for the sustainable development of human beings, environmental pollution control and development of new renewable energy have received more and more attention from all over the world. Among all kinds of environmental pollution, the most common and harmful one is chemical pollution, among which organic pollutants are the most important category. Among the 129 basic pollutants announced by the US Environmental Protection Agency, there are 9 categories and a total of 114 kinds of organic substances. . Although the traditional physical adsorption method, chemical oxidation me...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/18C02F1/30C02F101/34C02F101/36C02F101/38
CPCC02F1/30B01J31/1815C02F2305/10C02F2101/308C02F2101/36C02F2101/34C02F2101/38B01J2531/842B01J2531/0241B01J35/39
Inventor 岳呈阳雷晓武
Owner JINING UNIV
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