Molybdenum disulfide powder and method for manufacturing the same, method for degrading an organic material and method for sterilizing

Abstract

A method for manufacturing a molybdenum disulfide powder includes conducting a precursor solution preparation step and a hydrothermal synthesis step. The precursor solution preparation step includes providing sodium molybdenum oxide dehydrate and thiourea, and conducting a mixing step. In the mixing step, an acid solution is mixed with the sodium molybdenum oxide dehydrate and the thiourea by titrating so as to form a precursor solution. In the hydrothermal synthesis step, the precursor solution is put into a hydrothermal container for reacting at a temperature ranging from 100° C. to 350° C. for 8 hours to 40 hours, thus the molybdenum disulfide powder is formed.

1 . A method for manufacturing a molybdenum disulfide powder, comprising:
 conducting a precursor solution preparation step, comprising:
 providing sodium molybdenum oxide dehydrate and thiourea; and 
 conducting a mixing step, wherein an acid solution is mixed with the sodium molybdenum oxide dehydrate and the thiourea by titrating so as to form a precursor solution; and 
   conducting a hydrothermal synthesis step, wherein the precursor solution is put into a hydrothermal container for reacting at a temperature ranging from 100° C. to 350° C. for 8 hours to 40 hours, thus the molybdenum disulfide powder is formed.   
     
     
         2 . The method for manufacturing the molybdenum disulfide powder of  claim 1 , further comprising:
 conducting a washing step, wherein the molybdenum disulfide powder is first washed with deionized water and then washed with ethanol; and   conducting a drying step, wherein the molybdenum disulfide powder dealt with the washing step is heated to dryness.   
     
     
         3 . The method for manufacturing the molybdenum disulfide powder of  claim 1 , wherein a mole ratio of the sodium molybdenum oxide dehydrate to the thiourea ranges from 1:0.5 to 1:5. 
     
     
         4 . The method for manufacturing the molybdenum disulfide powder of  claim 1 , wherein the precursor solution preparation step further comprises:
 providing a solution of 1-butyl-3-methylimidazolium chloride salt before conducting the mixing step, wherein the solution of the 1-butyl-3-methylimidazolium chloride salt is mixed with the sodium molybdenum oxide dehydrate and the thiourea.   
     
     
         5 . The method for manufacturing the molybdenum disulfide powder of  claim 4 , wherein a molar concentration of the 1-butyl-3-methylimidazolium chloride salt in the precursor solution is greater than 0 M and is smaller than or equal to 5M. 
     
     
         6 . The method for manufacturing the molybdenum disulfide powder of  claim 1 , wherein the acid solution is mixed with the sodium molybdenum oxide dehydrate and the thiourea with a titrating rate, and the titrating rate is greater than 0 ml/min and is smaller than or equal to 2.03 ml/min. 
     
     
         7 . A molybdenum disulfide powder made by the method according to  claim 1 , wherein the molybdenum disulfide powder is stacked from a plurality of layered structures. 
     
     
         8 . The molybdenum disulfide powder of  claim 7 , wherein an average particle size of the molybdenum disulfide powder ranges from 0.2 μm to 10 μm. 
     
     
         9 . The molybdenum disulfide powder of  claim 7 , wherein at least one of the layered structures is an odd-layer structure. 
     
     
         10 . A method for degrading an organic material, comprising:
 providing a molybdenum disulfide powder, wherein the molybdenum disulfide powder is stacked from a plurality of layered structures, and at least one of the layered structures is an odd-layer structure;   conducting a contacting step, wherein the molybdenum disulfide powder is contacted with a medium, and the medium comprises at least one organic material and water, and   conducting a degrading step, wherein a mechanical perturbation is generated in the medium to polarize the molybdenum disulfide powder, and a pair of electron and hole are generated for degrading the organic material.   
     
     
         11 . The method for degrading the organic material of  claim 10 , wherein the medium is an aqueous solution. 
     
     
         12 . The method for degrading the organic material of  claim 11 , wherein the organic material is rhodamine or methylene blue. 
     
     
         13 . The method for degrading the organic material of  claim 11 , wherein the mechanical perturbation is generated by an ultrasonic wave. 
     
     
         14 . The method for degrading the organic material of  claim 10 , wherein the medium is an air. 
     
     
         15 . The method for degrading the organic material of  claim 14 , wherein the organic material is an organic gas. 
     
     
         16 . A method for sterilizing, comprising:
 providing a molybdenum disulfide powder, wherein the molybdenum disulfide powder is stacked from a plurality of layered structures, and at least one of the layered structures is an odd-layer structure;   conducting a contacting step, wherein the molybdenum disulfide powder is contacted with a medium, and the medium comprises at least one bacterium and water; and   conducting a sterilizing step, wherein a mechanical perturbation is generated in the medium to polarize the molybdenum disulfide powder, and a pair of electron and hole are generated for killing the bacterium.   
     
     
         17 . The method for sterilizing of  claim 16 , wherein the medium is an air or an aqueous solution.