Preparation of Long Alumina Fibers in Aqueous Solution Using Oxalic Acid and Aluminum Nitrate

Long alumina .fibers with 60 cm in length were pre- pared by sol - gel method. The spinning sol was ob- tained by mixing aluminum nitrate, oxalic acid, and polyvinylpyrrolidone with a mass ratio of 10： 3： 2. Fourier transform infrared （ FTIR ） spectra, X-ray diffraction （XRD） , and scanning electron microscopy （SEM） were used to characterize the properties of the gel and ce- ramic fibers. The fibers with uniform diameter and smooth surface were obtained by sintering at 1 200℃ for 1 h, and their main phase was indentified as α-Al2O3.

无机膜催化氧化在环境工程中的进展与应用

介绍了无机膜催化氧化在空气污染控制中的应用;对无机膜材料的种类及制备进行了比较,同时介绍了膜催化技术中催化剂的制备及无机催化膜的应用,以及纳米催化膜的进展,并对无机膜催化氧化在环境工程中的应用进行了展望。