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Catalyst for synthesis of hydrogen peroxide by catalyzing oxygen reduction under visible light and preparation method thereof

A technology of hydrogen peroxide and catalyst, which is applied in the field of catalyst and its preparation for catalytic oxygen reduction to synthesize hydrogen peroxide, which can solve problems such as explosion and achieve the effects of wide sources, rich content and good reaction stability

Inactive Publication Date: 2018-12-18
FUDAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, hydrogen and oxygen directly synthesize H 2 o 2 The process presents a potential explosion hazard

Method used

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  • Catalyst for synthesis of hydrogen peroxide by catalyzing oxygen reduction under visible light and preparation method thereof
  • Catalyst for synthesis of hydrogen peroxide by catalyzing oxygen reduction under visible light and preparation method thereof
  • Catalyst for synthesis of hydrogen peroxide by catalyzing oxygen reduction under visible light and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] Weigh 10.0 g urea and 10 mmol dipotassium hydrogen phosphate (K 2 HPO 4 ·3H 2 O), grind well in an alumina mortar, make it well mixed, and transfer to a 50mL alumina crucible. Place the crucible containing the precursor in a muffle furnace, raise the temperature to 450°C at a rate of 3°C per minute, keep it in still air for 2h, and cool down naturally to obtain a graphite-phase carbon nitride material doped with phosphorus and potassium. Sample It is light yellow. Grind the obtained block sample evenly to make it powdery, disperse it in deionized water, the ratio of sample to water is 1 g: 1 L, peel it off under ultrasonic for 3.0 h, vacuum filter it with a 0.45 μm filter membrane, and use it to remove Repeated washing with deionized water and suction filtration several times. The sample obtained by suction filtration was dried in a vacuum oven at 60° C. for 12 hours to obtain the CNKP-10 catalyst. The TEM photomicrograph of the catalyst is shown in figure 1 , the...

Embodiment 2

[0029] Dipotassium hydrogen phosphate (K 2 HPO 4 ·3H 2 O) replaced by potassium phosphate (K 3 PO 4 ), other preparation conditions are the same as in Example 1. The resulting catalyst is designated CNK3P-10.

Embodiment 3

[0031] Dipotassium hydrogen phosphate (K 2 HPO 4 ·3H 2 O) replaced by disodium hydrogen phosphate (Na 2 HPO 4 ), other preparation conditions are the same as in Example 1. The resulting catalyst was designated as CNNaP-10.

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Abstract

The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for synthesis of hydrogen peroxide by catalyzing oxygen reduction under visible light and a preparation method thereof. The catalyst of the invention is a phosphorus- and potassium-doped graphite-phase carbon nitride catalyst. A graphite-phase carbon nitride material is derived from thermal polymerization of urea, and phosphorus and potassium elements are introduced in situ during the thermal polymerization of urea to be doped in the skeleton structure of graphite-phase carbon nitride. By using the doped components to promote graphite-phase carbon nitride, synthesis of hydrogen peroxide by catalyzing oxygen reduction in the liquid system under visible light, at normal temperature and at ordinary pressure is realized. In comparison with the existing graphite-phase carbon nitride catalyst prepared by phosphorus and potassium co-modified melamine thermopolymerization, the graphite-phase carbon nitride catalyst prepared by phosphorus and potassium co-modified urea thermopolymerization shows a higher catalytic activity in the photocatalytic oxygen reduction reaction under visible light forsynthesis of hydrogen peroxide.

Description

technical field [0001] The invention belongs to the technical field of catalysts, and in particular relates to a catalyst for catalyzing oxygen reduction to synthesize hydrogen peroxide in a liquid phase system under visible light and a preparation method thereof. Background technique [0002] hydrogen peroxide (H 2 o 2 ) as an environmentally friendly oxidant is widely used in medical treatment, wastewater treatment, papermaking, textile, electronics and other industries. The traditional "anthraquinone autoxidation method" to produce hydrogen peroxide has the disadvantages of high energy consumption, environmental pollution by reaction by-products, and high production costs (Angew. Chem. Int. Ed., 2006, 45, 6962; ChemSusChem, 2016, 9, 3374). Compared with this multi-step, high-consumption production process, hydrogen (H 2 ) Oxygen (O 2 ) directly synthesized to H 2 o 2 The invention has the advantages of simple technological process, environmental friendliness, econo...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B01J27/24B01J35/00C01B15/01
CPCC01B15/01B01J27/24B01J35/19B01J35/39
Inventor 田静乔明华
Owner FUDAN UNIV
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