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Molybdenum disulfide/formamidinium lead bromate composite photocatalyst, and preparation method and applications thereof

A technology of formamidine lead bromate and molybdenum disulfide, which is applied in the field of molybdenum disulfide/formamidine lead bromate composite photocatalyst and its preparation, can solve problems such as ecological pollution, affecting people's life and health, and achieve reduction Effects of loading ratio, ideal energy band width, and mild preparation conditions

Inactive Publication Date: 2019-11-19
GUANGDONG UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Aromatic alcohol is a common organic compound, which is widely used in various aspects of daily necessities such as food spices, preservatives, and medicine. Therefore, there are also a large amount of aromatic alcohol in the sewage discharged from related factories, and there is no clean aromatic alcohol Serious ecological pollution will be caused by soil infiltration, evaporation or discharge into rivers, which will further affect people's life and health

Method used

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  • Molybdenum disulfide/formamidinium lead bromate composite photocatalyst, and preparation method and applications thereof
  • Molybdenum disulfide/formamidinium lead bromate composite photocatalyst, and preparation method and applications thereof
  • Molybdenum disulfide/formamidinium lead bromate composite photocatalyst, and preparation method and applications thereof

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Experimental program
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Effect test

Embodiment 1

[0035] 1. Preparation of molybdenum disulfide dispersion: Add 0.05g of molybdenum disulfide into 70ml of N,N-dimethylformamide, ultrasonicate for 20h at a water temperature lower than 30°C, and then perform centrifugation at a speed of 4000 revolutions per second, and the centrifugation time is 4 minutes. After the centrifugation, remove the upper layer solution, that is, the molybdenum disulfide dispersion. In order to remove dissolved oxygen in the molybdenum disulfide dispersion, the molybdenum disulfide dispersion was treated with nitrogen for 30 minutes, and 200ul formamidine lead bromate precursor solution was added dropwise to molybdenum disulfide treated with 2.5ml of nitrogen under magnetic stirring conditions. Dispersion in glass vials.

[0036] 2. Preparation of formamidine lead bromate precursor solution: Dissolve 1 mmol each of lead bromide and formamidine hydrobromide in 10 ml of N,N-dimethylformamide, and ultrasonically dissolve at 22°C until completely dissolve...

Embodiment 2

[0042] 1. Preparation of molybdenum disulfide dispersion: Add 0.1g of molybdenum disulfide into 70ml of N,N-dimethylformamide, ultrasonicate for 20 hours at a water temperature lower than 40°C, and then perform centrifugation at a speed of 3000 revolutions per second, and the centrifugation time is 2min. After the centrifugation, remove the upper layer solution, that is, the molybdenum disulfide dispersion. In order to remove dissolved oxygen in the molybdenum disulfide dispersion, the molybdenum disulfide dispersion was treated with nitrogen for 40 minutes, and 200ul formamidine lead bromate precursor solution was added dropwise to molybdenum disulfide treated with 2.5ml of nitrogen under magnetic stirring conditions. Dispersion in glass vials.

[0043] 2. Formamidine lead bromate precursor solution preparation: Dissolve 1mmol each of lead bromide and formamidine hydrobromide in 5ml of N,N-dimethylformamide, and ultrasonically dissolve at 30°C until completely dissolved. Obt...

Embodiment 3

[0046] 1. Preparation of molybdenum disulfide dispersion: Add 0.08g of molybdenum disulfide into 70ml of N,N-dimethylformamide, ultrasonicate for 40 hours at a water temperature below 20°C, and then perform centrifugation at a speed of 1000 revolutions per second, and the centrifugation time is 10 minutes. After the centrifugation, remove the upper layer solution, that is, the molybdenum disulfide dispersion. In order to remove the dissolved oxygen in the molybdenum disulfide dispersion, the molybdenum disulfide dispersion was treated with nitrogen for 10 minutes, and 200ul formamidine lead bromate precursor solution was added dropwise to the molybdenum disulfide treated with 2.5ml of nitrogen under magnetic stirring conditions. Dispersion in glass vials.

[0047] 2. Preparation of formamidine lead bromide precursor solution: Dissolve 1 mmol each of lead bromide and formamidine hydrobromide in 8 ml of N,N-dimethylformamide, and sonicate at 40°C until completely dissolved. Obt...

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Abstract

The invention belongs to the technical field of photocatalyst, and discloses a molybdenum disulfide / formamidinium lead bromate composite photocatalyst, and a preparation method and applications thereof. The preparation method comprises following steps: with magnetic stirring, a formamidinium lead bromate precursor solution is added into a molybdenum disulfide dispersion liquid drop by drop, a toluene solution is added, and at last vacuum drying is carried out; wherein the formamidinium lead bromate precursor solution is prepared through mixing of lead bromide, formamidinium bromide, and N , N-dimethyl formamide and ultrasonic treatment until complete dissolving; the molybdenum disulfide dispersion liquid is prepared through following steps: molybdenum disulfide is added into N, N-dimethylformamide for ultrasonic treatment, and then centrifugation processing of an upper layer solution is carried out, and the upper layer solution is subjected to gas introduction treatment, wherein the adopted gas is nitrogen gas or argon gas. The molybdenum disulfide / formamidinium lead bromate composite photocatalyst is wide in visible light response ranges, high in light adsorption capacity, possesses excellent photocatalytic activity, and can be adopted in benzyl alcohol photocatalytic oxidation.

Description

technical field [0001] The invention belongs to the technical field of photocatalytic oxidation, and more specifically relates to a molybdenum disulfide / formamidine lead bromate composite photocatalyst and a preparation method and application thereof. Background technique [0002] Aromatic alcohol is a common organic compound, which is widely used in various aspects of daily necessities such as food spices, preservatives, and medicine. Therefore, there are also a large amount of aromatic alcohol in the sewage discharged from related factories, and there is no clean aromatic alcohol Through soil infiltration, evaporation or discharge into rivers, etc., the ecology will be seriously polluted, which will further affect people's life and health. In order to solve this problem, scientific researchers have searched for many physical, chemical, and biological methods, among which photocatalytic oxidation is the most ideal solution. Photocatalytic oxidation uses sunlight to excite ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J31/34B01J37/34B01J37/10B01J37/08C02F1/30C02F1/72C02F101/34
CPCB01J31/34B01J37/343B01J37/10B01J37/08C02F1/30C02F1/725C02F2101/34C02F2305/10B01J35/39
Inventor 陈其赞罗东向张梦龙李洁
Owner GUANGDONG UNIV OF TECH
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