3 results about "Enterococcus" patented technology

The invention discloses a Pd / Fe@Fe3O4 compound catalyst as well as a preparation method and application thereof. The preparation method comprises the following steps: (1) culturing enterococcus faecalis to a stable period, filtering, , washing and preparing into freeze-dried powder; (2) adding the enterococcus faecalis freeze-dried powder into a palladium pecursor solution, and carrying out culturing, so as to obtain bacterial suspension; (3) adding sodium formate into the bacterial suspension, and carrying out constant-temperature culturing, ultrasonic crushing, wahsing and drying, so as to obtain biologically recycled palladium; and (4) ultrasonically dispersing biologically recycled palladium, Fe3O4 and ferrite into water to obtain dispersion liquid, dropwise adding a sodium borohydridesolution into the dispersion liquid for reaction, washing, and drying, so as to obtain the Pd / Fe@Fe3O4 compound catalyst. Palladium in the Pd / Fe@Fe3O4 compound catalyst is derived from biologically recycled palladium, the preparation method is simple, the use amount of palladium is reduced, and the prepared compound catalyst is uniform in particle size and is high in catalytic activity, low in pollution and cost and easily available in the application in the catalytic degradation of environmental organic pollutants.