A kind of bimetal cluster-supported photocatalyst and its preparation method and application

A photocatalyst and bimetallic technology, which is applied in the field of photocatalyst and preparation, can solve the problems of low solar energy utilization efficiency, achieve high stability, simple process flow, and mild reaction conditions

Active Publication Date: 2022-05-17
DALIAN NATIONALITIES UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But nano TiO 2 (P 25 ) itself still has shortcomings, that is, the utilization efficiency of solar energy is relatively low

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0015] Dissolve 0.3mg palladium nitrate in water, 4mg AgNO 3 Dissolved in water, 25mgNaOH dissolved in water. The above palladium nitrate aqueous solution, AgNO 3 The aqueous solution was mixed with NaOH aqueous solution, 3ml of deionized water and 0.4ml of absolute ethanol, and then stirred vigorously for 15 minutes. The resulting clear solution was transferred to a reaction kettle lined with polytetrafluoroethylene, sealed and heated to 200°C for 3 hours, and then cooled naturally to room temperature. The product was precipitated by acetone and centrifuged at 10,000 rpm for 5 min. Further wash three times with ethanol solution. Finally, the obtained product was dispersed in cyclohexane for further use. Among them, the mass ratio of metal Ag to metal Pd is 18:1, which is abbreviated as bimetallic cluster Ag 18 Pd.

[0016] Weigh the above bimetallic cluster Ag 18 Pd1.325mg was mixed with 0.5ml dichloromethane, ultrasonicated for 3 minutes at room temperature, dispersed...

Embodiment 2

[0018] Dissolve 0.3mg chloroplatinic acid in water, 3.48mg AgNO 3 Dissolved in water, 25mgNaOH dissolved in water. The above chloroplatinic acid aqueous solution, AgNO 3 The aqueous solution was mixed with NaOH aqueous solution, 3ml of deionized water and 0.4ml of absolute ethanol, and then stirred vigorously for 15 minutes. The resulting clear solution was transferred to a reaction kettle lined with polytetrafluoroethylene, sealed and heated to 200°C for 3 hours, and then cooled naturally to room temperature. The product was precipitated by acetone and centrifuged at 10,000 rpm for 5 min. Further wash three times with ethanol solution. Finally, the obtained product was dispersed in cyclohexane for further use. Among them, the mass ratio of metal Ag to metal Pt is 16:1, which is abbreviated as bimetallic cluster Ag 16 Pt.

[0019] Weigh the above bimetallic cluster Ag16 Pt1.325mg was mixed with 0.5ml dichloromethane, ultrasonicated for 3 minutes at room temperature, disp...

Embodiment 3

[0021] Dissolve 13.2mg of chloroauric acid in water, 0.3mg of AgNO 3 Dissolved in water, 25mgNaOH dissolved in water. The above chloroauric acid aqueous solution, AgNO 3 The aqueous solution was mixed with NaOH aqueous solution, 3ml of deionized water and 0.4ml of absolute ethanol, and then stirred vigorously for 15 minutes. The resulting clear solution was transferred to a reaction kettle lined with polytetrafluoroethylene, sealed and heated to 200°C for 3 hours, and then cooled naturally to room temperature. The product was precipitated by acetone and centrifuged at 10,000 rpm for 5 min. Further wash three times with ethanol solution. Finally, the obtained product was dispersed in cyclohexane for further use. Among them, the mass ratio of metal Au to metal Ag is 40:1, which is abbreviated as bimetallic cluster Au 40 Ag.

[0022] Weigh the above bimetallic cluster Au 40 Ag1.325mg was mixed with 0.5ml dichloromethane, ultrasonicated for 3 minutes at room temperature, di...

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Abstract

A bimetallic cluster-supported photocatalyst, which is made of nano-TiO 2 (P 25 ) carrier-loaded bimetallic clusters, the bimetallic clusters are composed of metal M Ⅰ with Metal M Ⅱ composition, and the metal M Ⅰ with Metal M Ⅱ The mass ratio is 10:1‑50:1, the M Ⅰ One of Au and Ag, M Ⅱ It is one of Ag, Pt, Pd, Ru. The preparation method of this photocatalyst mainly is: metal M Ⅰ with Metal M Ⅱ Synthesize bimetallic clusters and dissolve them with dichloromethane to obtain bimetallic clusters M Ⅰ m Ⅱ Precursor solution is loaded, and the bimetallic cluster M Ⅰ m Ⅱ The loaded precursor solution and nano-TiO 2 (P 25 ) into dichloromethane or acetonitrile solution to obtain bimetallic cluster M Ⅰ m Ⅱ The composite carrier was dried under vacuum at room temperature to obtain M Ⅰ m Ⅱ / TiO 2 catalyst. The invention is an oxidation reaction catalyst with high activity, high stability, high reaction efficiency, recyclable utilization, and the degradation rate can reach more than 90%.

Description

technical field [0001] The invention relates to a photocatalyst, a preparation method and an application. Background technique [0002] With the rapid development of people's living standards and economy, the problem of environmental pollution is becoming more and more serious. Especially water pollution, water pollution refers to the intervention of certain substances in the water body, which exceeds the self-purification ability of the water body, resulting in changes in its physical, chemical, and biological characteristics, thereby affecting the use value of water, endangering human health or destroying The ecological environment is a phenomenon that causes water quality to deteriorate. Water pollution can be divided into three types: chemical pollution, physical pollution and biological pollution. Environmental pollution caused by organic compounds, especially artificially synthesized organic substances, such as dyes, industrial wastewater (such as phenol), etc., once ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J23/52B01J37/10B82Y30/00B82Y40/00C02F1/30C02F101/30C02F101/34
CPCB01J23/50B01J23/52B01J35/004B01J37/10B82Y30/00B82Y40/00C02F1/30C02F2101/308C02F2101/345C02F2305/10
Inventor 马雪平李娜李苗董斌林峰
Owner DALIAN NATIONALITIES UNIVERSITY
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