3 results about "Sublimed sulphur" patented technology

The application discloses a MOFs derived iron sulfide heterogeneous electro-Fenton catalyst, a preparation method thereof and application of the catalyst in degradation and removal of organic pollutants. The preparation method of the catalyst is as follows: iron metal organic framework material MOFs and sublimed sulfur are mixed, supercritical technology is used to make the sulfur easily enter the MOFs material channel, and then calcination is performed to make the MOFs framework collapse, and the sulfur element reacts with the metal iron element to generate iron sulfide, so that the electron transfer efficiency of the material is further improved, and the pH of the Fenton reaction is widened. The catalyst synthesis process is simple, convenient and controllable, the prepared granular catalyst is applied to a heterogeneous electro-Fenton system, has good catalytic effect, and overcomes the defect that a traditional electro-Fenton catalyst is difficult to recover. The method provides an innovative method for a heterogeneous electro-Fenton cathode.

The application discloses a preparation method of concentration-dependent red light sulfur quantum dots and the red light sulfur quantum dots. The preparation method comprises the following steps: grinding, and reacting with sublimed sulfur, inorganic alkali and a heterocyclic functional reagent as raw materials and hydrogen peroxide as an etching agent; and then performing dialysis and freeze-drying to obtain the red light sulfur quantum dots. The heterocyclic functional reagent is a nitrogen-containing heterocyclic compound, and is at least one of 2-aminothiazole, imidazole-2-formaldehyde and 2-aminooxazole. The three SQDs all have concentration dependence, and the optimal emission wavelength is gradually red-shifted with the increase of the SQD concentration, and the maximum red shift is 130 nm. The maximum emission wavelength of the prepared SQDs can reach 690 nm, which indicates that the SQDs are red light emission fluorescent nanomaterials, and the fluorescence wavelength red shift can be attributed to non-radiative transition due to molecular assembly at a high concentration, i.e. fluorescence resonance energy transfer, and production of new emission centers. The application provides a new strategy for the research of concentration-dependent nanomaterials and red light emission SQDs.