Nano zero-valent iron-based magnetic mesoporous silica and preparation method and application thereof

• Main Authors: GUAN ZEYU, WAN JINQUAN, YAN ZHICHENG, WU MINRONG, MA YONGWEN, WANG YAN
• Format: Patent
• Language: Chinese; English
• Published: 12.10.2018
• Subjects: CASTING; CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; COMPOUNDS THEREOF; INORGANIC CHEMISTRY; MAKING METALLIC POWDER; MANUFACTURE OF ARTICLES FROM METALLIC POWDER; MANUFACTURE OR TREATMENT OF NANOSTRUCTURES; MEASUREMENT OR ANALYSIS OF NANOSTRUCTURES; METALLURGY; NANOTECHNOLOGY; NON-METALLIC ELEMENTS; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; POWDER METALLURGY; SPECIFIC USES OR APPLICATIONS OF NANOSTRUCTURES; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE; WORKING METALLIC POWDER

The invention discloses a preparation method of nano zero-valent iron-based magnetic mesoporous silica. The preparation method comprises the steps of: synthesizing nano zero-valent iron in a dispersion system by using a liquid phase reduction method, synthesizing a silica layer template with an adjustable pore size and adjustable pore channel thickness on the in-situ basis, and performing reflux extraction on the obtained product under different conditions so as to remove a templating agent and obtain the final product magnetic mesoporous silica material. Through the prepared magnetic mesoporous silica, not only can agglomeration and oxidation of the zero-valent iron be prevented effectively, but also the acid-base resistance of the magnetic particles can be increased, so that the magneticparticles can exist in the reaction system stably; the prepared magnetic mesoporous silica has the advantages of a large specific surface area, a uniform and adjustable pore size, controllable morphology, functional surface