A composite material met@fe 3 o 4 And its preparation method and application
A composite material and reactor technology, applied in the field of environmental protection, can solve the problems of low electron transfer efficiency, difficult contact with microorganisms, restricting popularization and application, etc., and achieves the effects of shortening the anaerobic fermentation time of acetic acid, strong feasibility and increasing yield.
Active Publication Date: 2022-02-18
TONGJI UNIV
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Problems solved by technology
However, Fe 3 o 4 The material also has some serious challenges: easy to aggregate, low water solubility, difficult to contact with microorganisms, low electron transfer efficiency, etc., which restrict its popularization and application in the process of anaerobic digestion and methane production
Method used
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Embodiment 1
[0032] Composite Met@Fe 3 o 4 The preparation process is carried out under the protection of an inert gas, and the specific preparation steps are: 3.25g ferric chloride, 1.27g ferrous chloride and 2.98g methionine are added to a reaction vessel with 100mL ultrapure water, and at room temperature Stir fully at 150rpm, then add 2M sodium hydroxide aqueous solution to the reaction vessel until the pH of the system in the reaction vessel is 11±0.2, then place the reaction vessel in a water bath at 90°C and stir at a speed of 150rmp React for 10 hours. After the reaction, centrifuge at 4500rmp for 15 minutes to separate the black precipitate, then wash it with ultrapure water 3 times to remove excess methionine groups on the surface of the black precipitate, and finally place the black precipitate in a vacuum at 55°C Dry in a drying oven for 18 hours to obtain a black solid, which is the target composite material Met@Fe 3 o 4 .
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The invention discloses a composite material Met@Fe 3 o 4 The preparation method and application thereof belong to the technical field of environmental protection. The steps of the preparation method of the present invention are as follows: adding ferric chloride, ferrous chloride and methionine into a reaction vessel equipped with ultrapure water, fully stirring, and then adding aqueous sodium hydroxide solution into the reaction vessel until the reaction vessel The pH of the system is 11±0.2, and then the reaction is carried out under the condition of a water bath, and the reaction is carried out under the protection of an inert gas. After the reaction, the black solid obtained by centrifugation, washing with water, and vacuum drying is the target composite material Met@Fe 3 o 4 . The present invention passes through methionine (Met) to ferric oxide (Fe) 3 o 4 ) for surface modification to obtain Met@Fe 3 o 4 Composites, the resulting Met@Fe 3 o 4 It has better dispersibility, biocompatibility and conductivity, and its application in the anaerobic fermentation process of acetic acid can not only greatly increase the production of methane, but also significantly increase the production rate of methane and the degradation rate of acetic acid, and shorten the time of acetic acid anaerobic fermentation. Oxygen fermentation time.
Description
technical field [0001] The invention relates to a composite material Met@Fe 3 o 4 The preparation method and application thereof belong to the technical field of environmental protection. Background technique [0002] With the rapid economic and social development and population growth, the amount of urban organic waste is increasing rapidly. Therefore, proper disposal of urban organic waste has received more and more attention. Anaerobic digestion, as a green and economical technology that can meet the global sustainable development goals and can recover renewable energy (methane) while reducing organic waste, is considered to be a better method for organic waste reuse. method. Generally, anaerobic digestion consists of three stages, hydrolysis stage, acidification stage and methanogenic stage. Among them, acetic acid is an important intermediate product in the anaerobic digestion process, and it is reported that about 70% of methane is converted from acetic acid. The...
Claims
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IPC IPC(8): C01G49/08C12P5/02
CPCC01G49/08C12P5/023C01P2002/72C01P2002/88C01P2006/40Y02E50/30
Inventor 陈银广苏瑜
Owner TONGJI UNIV
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