Plant leaves-derived carbon material doped with two metals and preparation and use thereof
AssigneeZhejiang University of Technology
InventorsHaimin Shen, Dong Lv
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Abstract
A plant leaves-derived carbon material doped with two metals and preparation and use thereof are provided, the carbon material prepared by carbonizing, in an inert atmosphere, plant leaves which have absorbed ions of two metals M1 and M2. The metal M1 is Co, Mn, or Fe. The metal M2 is Ni, Cu, or Zn. The carbon material can be used as an efficient, green, and safe catalyst for the selective oxidation of cycloalkanes to produce cycloalkanols and cycloalkanones, and enable an increased selectivity of the target products (thus less by-products), a low yield of cycloalkyl peroxides, reduced reaction temperature, low environmental impact, and safe production.
Claims8
A method for preparing plant leaves-derived carbon material doped with two metals, prepared by carbonizing, in an inert atmosphere, plant leaves which have absorbed ions of two metals M1 and M2, the method comprising:
- immersing a bottom of a branch with the plant leaves in an aqueous solution of metal salts of the metals M1 and M2 for a period of time, followed by removal of the leaves from the branch and washing with fresh water;
- carbonizing the leaves in a nitrogen atmosphere, followed by cooling the carbonized leaves to room temperature and then grinding the carbonized leaves after being cooled to a powder;
- and
- washing the powder by stirring the powder in a volume of a hydrochloric acid solution in order to remove inorganic salts therefrom, followed by suction filtration, washing until neutral with water, and drying;
- wherein, the metal M1 is Co, Mn, or Fe, and the metal M2 is Ni, Cu, or Zn;
- and
- wherein, the leaves are derived from at least one tree selected from the group consisting of Salix babylonica, Firmiana simplex, Magnolia denudata, Osmanthus, Viburnum odoratissimum, Ginkgo biloba, PopulusL., and Metasequoia glyptostroboides.
A method for preparing plant leaves-derived carbon material doped with two metals, prepared by carbonizing, in an inert atmosphere, plant leaves which have absorbed ions of two metals M1 and M2, the method comprising:
- immersing a bottom of a branch with the plant leaves in an aqueous solution of metal salts of the metals M1 and M2 for a period of time, followed by removal of the leaves from the branch and washing with fresh water;
- carbonizing the leaves in a nitrogen atmosphere, followed by cooling the carbonized leaves to room temperature and then grinding the carbonized leaves after being cooled to a powder;
- and
- washing the powder by stirring the powder in a volume of a hydrochloric acid solution in order to remove inorganic salts therefrom, followed by suction filtration, washing until neutral with water, and drying;
- wherein, the metal M1 is Co, Mn, or Fe
- wherein, the metal M2 is Ni, Cu, or Zn;
- and
- wherein, the aqueous solution of metal salts of the metals M1 and M2 has a concentration of the salt of the metal M1 varying from 0.000001 to 0.001 mol/L and a concentration of the salt of the metal M2 varying from 0.000001 to 0.001 mol/L.
A method for preparing plant leaves-derived carbon material doped with two metals, prepared by carbonizing, in an inert atmosphere, plant leaves which have absorbed ions of two metals M1 and M2, the method comprising:
- immersing a bottom of a branch with the plant leaves in an aqueous solution of metal salts of the metals M1 and M2 for a period of time, followed by removal of the leaves from the branch and washing with fresh water;
- carbonizing the leaves in a nitrogen atmosphere, followed by cooling the carbonized leaves to room temperature and then grinding the carbonized leaves after being cooled to a powder;
- and
- washing the powder by stirring the powder in a volume of a hydrochloric acid solution in order to remove inorganic salts therefrom, followed by suction filtration, washing until neutral with water, and drying;
- wherein, the metal M1 is Co, Mn, or Fe
- wherein, the metal M2 is Ni, Cu, or Zn;
- and
- wherein, the bottom of the branch with the plant leaves is immersed in the aqueous solution of metal salts of the metals M1 and M2 for 1.0 to 48.0 h;
- wherein, the leaves are carbonized at 300 to 1000° C.for 1.0 to 5.0 h;
- wherein, the hydrochloric acid solution used to wash the powder is at a concentration of 1.0 to 5.0 mol/L;
- and wherein, the powder is washed by stirring it in the hydrochloric acid solution for 4.0 to 12.0 h.
Dependencies are inferred from the claim text.