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A kind of preparation method and application of micron tubular silver simple substance

An elemental, tubular technology, applied in chemical instruments and methods, water/sludge/sewage treatment, metal/metal oxide/metal hydroxide catalysts, etc., can solve the problems of low efficiency of organic pollutants, and achieve the preparation method Simple, speed up oxidative decomposition rate, and save energy

Inactive Publication Date: 2016-03-23
NANJING UNIV OF INFORMATION SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, hydrogen peroxide has become one of the most environmentally friendly oxidants, because the products after its decomposition are only water and oxygen, but the efficiency of degrading organic pollutants is low

Method used

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  • A kind of preparation method and application of micron tubular silver simple substance
  • A kind of preparation method and application of micron tubular silver simple substance
  • A kind of preparation method and application of micron tubular silver simple substance

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0022] The following tests were carried out at a room temperature of 10-12°C.

[0023] Weigh 0.05g (0.00078mol) of copper powder into a small beaker, add 30mL of deionized water, then add 0.8g (0.0070mol) of PVPK-30 (Sinopharm Chemical Reagent Co., Ltd., the same below) and stir for 10 minutes to make The system is uniformly dispersed, and solution A is obtained. Weigh 0.318g of AgNO 3 (0.00187mol) into another beaker, add 10mL deionized water to dissolve, and obtain silver nitrate solution. Under the stirring state, the silver nitrate solution is poured into the solution A at one time, and the reaction is carried out under the stirring state until the color of the reaction system changes from red to black, and the reaction is completed to obtain a reaction mixture solution. Add 2.1014g (0.01mol) of citric acid monohydrate to the reaction mixture solution, stir for 10 minutes to make the system uniform, centrifuge to collect the precipitate, wash with water and ethanol in se...

Embodiment 2

[0025] The following tests were carried out at a room temperature of 15-18°C.

[0026] Weigh 0.05g (0.00078mol) of copper powder into a small beaker, add 30mL of deionized water, then add 3.5g (0.0315mol) of PVPK-30 into the beaker, stir for 10 minutes to disperse the system evenly, and obtain solution A. Weigh 3.312g (0.0195mol) of AgNO 3 In another beaker, add 10mL deionized water to dissolve to obtain a solution containing silver ions. Under stirring, the AgNO 3 The solution was poured into the solution A at one time, and the reaction was carried out under stirring until the color of the reaction system changed from red to black to obtain a reaction mixture solution. Add 4.2028g (0.02mol) of citric acid monohydrate to the reaction mixture solution, stir for 20 minutes to make the system uniform, centrifuge to collect the precipitate, wash with water and ethanol in turn, and dry at 60°C for 6 hours to obtain material 2. From the X-ray electron diffraction image of materia...

Embodiment 3

[0028] The following tests were carried out at a room temperature of 26-28°C.

[0029] Weigh 0.05g (0.00078mol) of copper powder into a small beaker, add 30mL of deionized water, then add 5.3g (0.0477mol) of PVPK-30 into the beaker, stir for 10 minutes to disperse the system evenly, and obtain solution A. Weigh 6.625g (0.0389mol) of AgNO 3 In another beaker, add 10mL deionized water to dissolve to obtain a solution containing silver ions. Under stirring, the AgNO 3 The solution was poured into the solution A at one time, and the reaction was carried out under stirring until the color of the reaction system changed from red to black to obtain a reaction mixture solution. Add 6.3042 g (0.03 mol) of citric acid monohydrate to the reaction mixture solution, stir for 30 minutes to make the system uniform, centrifuge to collect the precipitate, wash with water and ethanol in sequence, and dry at 65°C for 5 hours to obtain material 3. From the X-ray electron diffraction image of m...

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Abstract

The invention provides a preparation method and application of micron tubular silver simple substance, and relates to the field of catalysts. The preparation method of the micron tubular silver element comprises the following steps: (1) adding copper powder and polyvinylpyrrolidone into water, stirring evenly to obtain solution A; (2) adding the solution containing silver ions into solution A to replace react to obtain a reaction mixture solution; (3) add citric acid to the reaction mixture solution, stir evenly, centrifuge to collect precipitate, wash and dry to obtain the micron tubular silver element. The preparation method of the micron tubular silver simple substance of the present invention is simple, can be completed at room temperature, does not need heating, and can save energy. The micron tubular silver simple substance of the present invention can efficiently catalyze the decomposition of hydrogen peroxide, thereby greatly accelerating the rate of oxidation and decomposition of organic pollutants catalyzed by hydrogen peroxide.

Description

technical field [0001] The invention relates to the field of catalysts, in particular to a preparation method and application of a micron tubular silver element. Background technique [0002] With the development of industrialization, serious environmental pollution problems follow. Harmful particle pollutants in the atmosphere and sewage discharged from factories threaten the stability of people's living environment and ecological environment. Degradation of organic pollutants in wastewater has also become a top priority. [0003] Photocatalytic technology is considered to be a green and energy-saving environmental purification technology. It has been developed for many years, but its low quantum efficiency, low solar energy utilization rate, and low photocatalytic activity are still a serious challenge. The practical application of photocatalytic technology still needs further exploration and in-depth research. [0004] The use of practical oxidants to directly oxidize a...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B01J23/50B01J35/02C02F1/30C02F1/72C02F101/38
CPCY02W10/37
Inventor 滕飞陈敬一张桐瑜陈敏东
Owner NANJING UNIV OF INFORMATION SCI & TECH
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