Red-mud-based molecular-sieve-oaded titanium dioxide/ferric oxide composite photocatalytic material and preparation method and application thereof

• Main Authors: GUO WENNING, YANG YANLING, LI DAOHUI, AN DONGDONG, SUN YIMENG, YE XIAOHUI, FENG LEI, ZHANG LI, SUO GUOQUAN, HOU XIAOJIANG
• Format: Patent
• Language: Chinese; English
• Published: 22.10.2021
• Subjects: CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOIDCHEMISTRY; CHEMISTRY; METALLURGY; PERFORMING OPERATIONS; PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL; THEIR RELEVANT APPARATUS; TRANSPORTING; TREATMENT OF WATER, WASTE WATER, SEWAGE, OR SLUDGE

The invention provides a red-mud-based molecular-sieve-loaded titanium dioxide/ferric oxide composite photocatalytic material and a preparation method and application thereof. The method comprises the following steps: step 1, sequentially subjecting red mud to acidifying and drying to obtain acid-activated red mud; step 2, uniformly mixing the acid-activated red mud and a cetyltrimethylammonium bromide solution to obtain a mixed system A, adding an NH3.H2O solution and tetraethoxysilane into the mixed system A, and performing uniform mixing to obtain a mixed system B; step 3, centrifuging the mixed system B, drying precipitate, and performing roasting to obtain silicon dioxide loaded with ferric oxide; and step 4, uniformly mixing the silicon dioxide loaded with ferric oxide, ethanol, glycerol and tetrabutyl titanate, then performing hydrothermal reaction, then separating precipitate in obtained reaction liquid, and then performing drying to obtain a molecular-sieve-loaded titanium dioxide/ferric oxide compos