Organic and inorganic hybridized lead iodide visible light catalysis material and preparation method thereof

A catalytic material, 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 low photocatalytic efficiency and poor photochemical stability of lead iodide, etc. problem, to achieve the effect of stable visible light catalytic performance, good thermal stability, and good photochemical stability

Active Publication Date: 2019-04-12
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 and inorganic hybridized lead iodide visible light catalysis material and preparation method thereof
  • Organic and inorganic hybridized lead iodide visible light catalysis material and preparation method thereof
  • Organic and inorganic hybridized lead iodide visible light catalysis 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 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 water ...

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 mol / L Rhodamine B (RhB) solution in the quartz reactor, 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 Bot...

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Abstract

The invention provides an organic and inorganic hybridized lead iodide visible light catalysis material. The molecular formula of the material is [Fe(2.2-bipy)3]2Pb8l21, Fe(SO4) 7H2O, 2,2-dipyridyl, Pbl2 and Kl are adopted and added into a mixed solution of 0.5-1 mL of Hl, 4-5 mL of N.N-dimethyl formamide and 1-2 mL of H2O according to the molar ratio being (2-2.5):(6-6.5):(8-8.5):(2-2.5), and themixture is put into a reaction kettle to be sealed; the sealed reaction kettle is placed into a drying box and heated to 140 DEG C through 5 h, then, a constant temperature reaction is performed under the temperature of 140-160 DEG C for 6-8 h, the temperature is lowered to the room temperature, and suction filtration, washing and airing are performed to obtain the material. A transition metal compound is introduced as a positive ion and a template agent for the first time, the organic and inorganic hybridized lead iodide compound is synthesized, the compound can effectively absorb visible light in sunlight, the material has the efficient and stable visible light catalysis performance, and rhodamine B and other organic contaminants can be decomposed under the visible light irradiation effect.

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 Applications(China)
IPC IPC(8): B01J31/18C02F1/30C02F101/34C02F101/36C02F101/38
CPCB01J31/1815B01J35/004B01J2531/0241B01J2531/842C02F1/30C02F2101/308C02F2101/34C02F2101/36C02F2101/38C02F2305/10
Inventor 岳呈阳雷晓武
Owner JINING UNIV
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