49results about How to "The preparation operation process is simple" patented technology

The invention discloses an application for isobenzofuran type compounds in marine biofouling prevention and a preparation method thereof, which belongs to the field of marine fouling organism repellency and mainly solves the problem of marine biofouling. The application for isobenzofuran type compounds in marine biofouling prevention can be used for preventing underwater structure surfaces from being attached and / or fouled by marine organisms. The sobenzofuran type compounds are all obtained from isolation of fungus which is named cephalosporium cordaAL 031 in the strain classification, and the preservation serial number of the fungus strain is CCTCC Number M2010140. Extracts of secondary metabolites of the fungus and two isobenzofuran type compounds are performed a fouling resistance activity screening, the experiment result indicates that the extracts of secondary metabolites of the fungus and two isobenzofuran compounds show high fouling resistance activity, attachment of marine fouling organisms can be inhibited, and the application for isobenzofuran type compounds in marine biofouling prevention and the preparation method thereof can be used for prevention and treatment of marine biofouling and have a good application perspective.

The invention discloses an alkaloid compound. The alkaloid compound is chemically named as 8-hydroxy-3-hydroxymethyl-6,9-dimethyl-7H-benzo[de]isoquinoline-7-one and has a chemical formula C15H13NO3 and the structure shown in the specification. The invention further discloses a method for preparing the alkaloid compound from tobaccos. The invention further discloses use of the alkaloid compound. Activity tests prove that the alkaloid compound has a relatively good bacteriostatic action. The alkaloid compound is of a novel structure and has relatively good antibacterial activity. By applying the alkaloid compound to tipping paper of cigarettes, the possibilities of breeding and reproduction of bacteria in the tipping paper of the cigarettes can be eliminated or reduced.

The invention discloses the application of a soil extractant in treating lead-contaminated soil. The soil extractant is composed of biomass charcoal and magnetic powder. Among them, biochar and magnetic powder (with Fe 3 o 4 ) has a mass ratio of (1.5‑2.5):1. When the dosing mass of the soil extractant in the soil is 5%, the lead pollution concentration is reduced by 30.8-41.9% after the soil extractant treats the lead-contaminated soil for 7 days. In the above technical solution, when the weight of the soil extractant added to the soil is 5%, after the soil extractant treats lead-contaminated soil for 30 days, the concentration of lead pollution is reduced by 26.8-40.1%.

The invention discloses a composite photocatalyst and a preparation method thereof. The composite photocatalyst is a bismuth molybdate and cadmium sulfide composite photocatalyst and enables water to produce hydrogen continuously under irradiation of visible light of sunlight. The prepared bismuth molybdate and cadmium sulfide composite photocatalyst has a large-area contact interface and facilitates carrier separation, bismuth molybdate and cadmium sulfide are stable in structure and are in band gap matching, so that photocatalytic activity is improved, catalytic effect is stable, and excellent properties of photocatalytically splitting water into hydrogen, photodegrading organic pollutants and reducing heavy metal ions and carbon dioxide are obtained; the raw materials for the synthetic method are common, the preparation operating process is simple, technological parameters are easy to realize, the cost is low, the operation is simple, the yield is high, the service life cycle is long, and the composite photocatalyst and the preparation method thereof have broad application prospect and industrial prospect in the fields of photocatalytic splitting of water into hydrogen, photodegradation of organic pollutants, reduction of heavy metal ions and carbon dioxide and the like.