Method for efficiently preparing hydrogen and nano silver

A hydrogen and nano technology, which is applied to the fields of hydrogen production and nanomaterial preparation, can solve the problems of low yield of nano-Ag, difficult agglomeration of nanoparticles and subsequent separation, and cannot be used as a means of hydrogen production. The process is simple and easy to implement, and the effect of easy industrialized large-scale production

Active Publication Date: 2015-06-10
ANHUI UNIVERSITY OF TECHNOLOGY
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Problems solved by technology

Therefore, it cannot be used as an effective means of hydrogen production; in addition, the yield of nano-Ag is also very low, and long-term reaction will bring difficulties in the agglomeration of nanoparticles and subsequent separation.

Method used

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  • Method for efficiently preparing hydrogen and nano silver
  • Method for efficiently preparing hydrogen and nano silver
  • Method for efficiently preparing hydrogen and nano silver

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] The total weight of the smelted alloy is about 100 grams, and the Mg block (purity 99%) and Ag flakes (purity 99.5%) are weighed according to the composition of Mg90Ag10. Put the weighed Mg block and Ag sheet into a copper crucible and induce melting at a power of 15 KW to obtain a Mg-Ag binary alloy, which is composed of Mg 4 Ag, Mg 54 Ag 17 and Mg composition (eg figure 1 (a)). Use a grinder to remove the oxide skin on the surface of the smelted alloy, and then grind it into a 100-mesh alloy powder in a glove box. The alloy powder is ball-milled in a ball mill tank filled with 5 atm hydrogen for 20 h to obtain nanocrystalline MgH 2 and MgAg and nano-state or disordered amorphous state of the original composition phase without hydrogenation decomposition (such as figure 1 (b)); where the ball-to-material ratio is 20:1, and the speed of the ball mill is 400 rpm. The alloy powder after ball milling was directly used as the preparation of H 2 And nano Ag materials...

Embodiment 2

[0025] The total weight of the smelted alloy is about 100 grams, and the Mg block (purity 99%) and Ag flakes (purity 99.5%) are weighed according to the composition of Mg80Ag20. Put the weighed Mg block and Ag sheet into a copper crucible and induce melting at a power of 15 KW to obtain a Mg-Ag binary alloy, which is composed of Mg 4 Ag, Mg 54 Ag 17 and a small amount of Mg (such as figure 1 (c)). Use a grinder to remove the oxide skin on the surface of the smelted alloy, and then grind it into a 100-mesh alloy powder in a glove box. The alloy powder is ball-milled in a ball mill tank filled with 5 atm hydrogen for 20 h to obtain nanocrystalline MgH 2 and MgAg and nano-state or disordered amorphous state of the original composition phase without hydrogenation decomposition (such as figure 1 (d)); where the ball-to-material ratio is 20:1, and the speed of the ball mill is 400 rpm. The alloy powder after ball milling was directly used as the preparation of H 2 And nano Ag ...

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Abstract

The invention discloses a novel method for efficiently preparing hydrogen and nano silver, which belongs to the technical field of hydrogen production and nano material preparation. The method disclosed by the invention comprises the following four steps: smelting an Mg-Ag alloy, preparing alloy powder in a ball-milling mode, preparing hydrogen in a hydrolysis mode and preparing the nano silver. The method has the remarkable characteristics that the hydrogen production capacity is large (greater than 600ml / g), the hydrogen production speed is high (the hydrogen is completely released within 30 minutes), the particle size of the prepared nano silver is 30-60nm, the granularity distribution is uniform, the yield is high, no pollutant is generated in the preparation, and all products can be effectively utilized.

Description

technical field [0001] The invention relates to the technical fields of hydrogen production and nano material preparation, in particular to a new method for efficiently preparing hydrogen and nano silver. Background technique [0002] With the depletion of non-renewable energy sources such as oil, coal, and natural gas, the development of new energy sources has become a hot spot at present. Among them, hydrogen storage is abundant, the combustion heat is high, and pollution-free is considered to be the main energy source at the end of the oil age. The key to the utilization of hydrogen energy lies in the effective production of hydrogen. At present, electrolytic hydrogen production or chemical raw materials such as petroleum, coal, and natural gas are commonly used in industry to produce hydrogen, but they all have the disadvantages of large energy consumption and serious pollution. Therefore, new hydrogen production methods need to be solved urgently. At present, new hydr...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C22C1/02C22C23/00B22F9/22B22F9/30C01B3/08B82Y40/00B82Y30/00
CPCY02E60/36
Inventor 斯庭智张江波柳东明李永涛张庆安
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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