Preparation method and application of mercury-enriched membrane based on modified graphdiyne oxide

• Main Authors: LI XUE, HE QIANLI, MAO XUEFEI
• Format: Patent
• Language: Chinese; English
• Published: 11.08.2023
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIRCHEMICAL OR PHYSICAL PROPERTIES; MEASURING; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; PHYSICS; TESTING; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The preparation method of the mercury-enriched membrane based on the modified graphdiyne oxide comprises the following steps: step 1, carrying out cross-coupling reaction on hexaacetylene benzene serving as a precursor on the surface of copper to prepare graphdiyne (GDY); step 2, on the basis of the product obtained in the step 1, preparing graphdiyne oxide (GDYO) by taking concentrated nitric acid as a solvent and an oxidizing agent; step 3, dispersing the product obtained in the step 2 into pure water to obtain a dispersion, and then carrying out continuous magnetic stirring under a water bath condition; and finally, adding 3-MPTMS, and fully reacting under a dark condition, so as to prepare the 3-MPTMS functionalized graphdiyne oxide composite material (GDYO-3M). Step 4, loading the GDYO-3M suspension prepared in the step 3 on a microporous filtering membrane by using a vacuum suction filtration device to prepare a GDYO-3M mercury-enriched membrane; the method has the advantages of high mercury ion removal