文献类型：专利

英文题名：Preparation of ammonium fluoride-modified titanium dioxide visible light catalyst used in degrading organic compounds, by preparing mesoporous molecular sieve, adding basic titanium sulfate into sieve, and reacting with ammonium fluoride

作者：FANG W;HE Y;QI D;XING M;ZHANG J

机构：[1]UNIV EAST CHINA SCI&TECHNOLOGY

申请号：CN102266792-B

公开日：2013-01-16

语种：英文

收录：DERWENT

摘要：NOVELTY - Ammonium fluoride (NH4F)-modified titanium dioxide (TiO2) visible light catalyst is prepared by reacting polyethylene oxide polypropylene oxide-polyethylene oxide (PEO-PPO-PEO) triblock copolymer with NH4F and 1,3,5-trimethylbenzene, adding tetraethoxysilane, and heating to obtain mesoporous molecular sieve (MCF molecular sieve); preparing MCF loaded with TiO2 (MCF/TiO2) by adding basic titanium sulfate (Ti(SO4)2) and MCF molecular sieve; and modifying MCF/TiO2 by adding NH4F into solvent, then adding MCF/TiO2, heating solution, and washing separated precipitate with distilled water. USE - Method for preparing ammonium fluoride-modified titanium dioxide visible light catalyst (claimed) used in degrading organic compounds such as rhodamine B. ADVANTAGE - The method is simple in operation and low in cost, and utilizes easy to obtain the raw materials. The mesoporous material has high attaching performance and the prepared catalyst has high UV and visible light catalyzing degrading performance. DETAILED DESCRIPTION - Preparation of NH4F-modified TiO2 visible light catalyst comprises: (A) preparing foam type mesoporous molecular sieve (MCF molecular sieve) by dissolving PEO-PPO-PEO triblock copolymer at 37 degrees C into hydrochloric acid solution, adding NH4F and 1,3,5-trimethylbenzene into the polymer solution and agitating for 1 hour, then adding tetraethoxysilane at the same temperature and agitating for 20 hours, transferring the obtained solution into a high pressure kettle, heating for 24 hours at 100 degrees C, washing and depositing, vacuum drying obtained solid for 12 hours at 60 degrees C, and roasting dried material for 6 hours at 550 degrees C to obtain MCF molecular sieve; (B) preparing MCF loaded with TiO2 by adding Ti(SO4)2 solid with secondary distilled water and agitating for 30 minutes to completely dissolve the Ti(SO4)2, then adding the MCF molecular sieve, uniformly agitating the mixed solution for 4 hours, transferring the solution into a high pressure kettle, heating for 7 hours at 120 degrees C, washing the separated precipitate, vacuum-drying for 12 hours at 60 degrees C to obtain the MCF loaded with TiO2 catalyst (MCF/TiO2); and (C) modifying the MCF/TiO2 by adding NH4F into solvent and agitating for 1 hour to completely dissolve, then adding the MCF/TiO2 and agitating for 1 hour, transferring the solution into the high pressure kettle, then transferring into an oven at 120 degrees C, heating for 20 hours, washing the separated precipitate with distilled water for three times, and activating for 3 hours in vacuum at 200 degrees C to obtain the catalyst.