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Preparation of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and its application in photocatalytic hydrogen production

A technology of composite photocatalysis and methylamine iodide, which is applied in organic compound/hydride/coordination complex catalyst, physical/chemical process catalyst, hydrogen production, etc., can solve the problem of low hydrogen production rate of photocatalyst and composite material Difficulty in constructing the catalytic system, etc., to achieve the effect of broad commercial application prospects, simple synthesis conditions and methods, and low energy consumption

Active Publication Date: 2019-12-17
SHANDONG UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] For the problems existing in the above-mentioned prior art, and in order to solve CH 3 NH 3 PB 3 As the problem of low hydrogen production rate of photocatalyst, difficulty in constructing the catalytic system of composite materials, and stability of catalytic cycle, the present invention introduces graphene oxide (GO), and reduces it into reduced graphene oxide (rGO) by photoreduction, and utilizes CH 3 NH 3 PB 3 -rGO composite photocatalytic material to catalyze hydrogen production in hydroiodic acid

Method used

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  • Preparation of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and its application in photocatalytic hydrogen production
  • Preparation of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and its application in photocatalytic hydrogen production
  • Preparation of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and its application in photocatalytic hydrogen production

Examples

Experimental program
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Effect test

Embodiment 1

[0042] Example 1: CH 3 NH 3 PB 3 Preparation of -rGO composite photocatalytic material

[0043] Specific steps are as follows:

[0044] (1) Measure 100mL of hydroiodic acid with a graduated cylinder in a 200mL beaker, add 20g of lead iodide (PbI 2 ) and keep stirring until PbI 2 After complete dissolution, slowly add 7g methylamine iodide (CH 3 NH 3 1), stirring for 1h; heating, stirring and evaporating to dryness at 50°C to obtain CH 3 NH 3 PB 3 powder.

[0045] (2) Take 50mL of hydroiodic acid solution in a 100mL beaker, add 20g of CH obtained in step (1) 3 NH 3 PB 3 Powder, stirred for 0.5h, ultrasonicated for 10min to disperse evenly, and centrifuged to obtain saturated CH 3 NH 3 PB 3 solution.

[0046] (3) Take the saturated solution obtained in step (2) in a 100mL beaker, add 100mgCH 3 NH 3 PB 3 The powder and 5mgGO were ultrasonically dispersed for 10min to disperse evenly; then the mixture was transferred to a reactor equipped with a quartz cover and...

Embodiment 2

[0048] Example 2: CH with different rGO loads 3 NH 3 PB 3 Preparation of -rGO composite photocatalytic material

[0049] CH with different rGO composite ratios (mass fraction 1%, 5%, 10%) 3 NH 3 PB 3 - The preparation method of rGO is the same as that in Example 1, except that the amount of GO added to the saturated solution for photoreaction is 2 mg, 5 mg, and 10 mg, respectively.

[0050] The CH prepared by the above preparation method 3 NH 3 PbI and CH 3 NH 3 PB 3 The X-ray diffraction pattern of -rGO is shown in figure 1 , it can be seen from the figure that the CH prepared by this method 3 NH 3 PB 3 It is a tetragonal phase structure, and the introduction of rGO did not cause the formation of heterogeneous phases and structural defects.

[0051] Photos of the original saturated solution and the solution before and after the reaction are as follows figure 2 As shown, the occurrence of GO photoreduction can be intuitively seen from the color change.

[0052...

Embodiment 3

[0057] Example 3: Photocatalytic hydrogen production performance test

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Abstract

The invention discloses the preparation of methylamine lead iodine-reduced graphene oxide composite photocatalytic material and its application in photocatalytic hydrogen production. The present invention first uses a liquid phase reaction method to synthesize CH 3 NH 3 ikB 3 And prepare its saturated solution, then add graphene oxide GO, and obtain methylamine lead iodine-reduced graphene oxide composite photocatalytic material through photoreduction and photocomposite. This method is simple and easy to operate. The synthesized methylamine lead iodine-reduced graphene oxide composite photocatalytic material has excellent photocatalytic hydrogen production activity and stability, and has broad application prospects in photocatalytic hydrogen production.

Description

technical field [0001] The invention relates to the technical field of hydrogen preparation and photocatalytic reaction in the field of new energy, in particular to an organic / inorganic perovskite material methylamine lead iodine-reduced graphene oxide (CH 3 NH 3 PB 3 -rGO) composite photocatalytic material and its application in photocatalytic hydrogen production. Background technique [0002] The current energy shortage and environmental pollution are becoming more and more serious, which have become important factors restricting the sustainable development of the national economy and social progress in our country. Converting solar energy into electrical energy or chemical energy provides us with an ideal new way of energy utilization and environmental governance. Among them, hydrogen energy has the advantages of high energy density, environmental friendliness and renewable energy, and is a future alternative to fossil energy. Ideal replacement. In recent years, perov...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J31/02C01B3/04
CPCC01B3/042B01J31/0254C01B2203/1041B01J35/39Y02E60/36
Inventor 王朋吴亚强黄柏标王泽岩张晓阳秦晓燕刘媛媛张倩倩
Owner SHANDONG UNIV
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