α-Fe_2O_3的掺杂改性和降解性能  

Doping modification and degradation of α-Fe_2O_3

作　　者：涂盛辉[1] 刘婷[1] 骆中璨 杜军[1] 

机构地区：[1]南昌大学资源环境与化工学院,江西南昌330031

出　　处：《南昌大学学报（工科版）》2015年第4期307-313,共7页Journal of Nanchang University(Engineering & Technology)

基　　金：国家自然科学基金资助项目(51162022)

摘　　要：利用水热法制备α-Fe_2O_3,再以α-Fe_2O_3为活性组分,利用浸渍法制备Ag/α-Fe_2O_3、Al/α-Fe_2O_3、Zn/α-Fe_2O_3、Cu/α-Fe_2O_3催化剂,比较4种催化剂的催化活性,通过XRD、SEM、FT-IR等表征手段对Al/α-Fe_2O_3催化剂的结构和形貌进行分析,与纯的α-Fe_2O_3催化剂相比,负载铝的α-Fe_2O_3催化剂的催化活性更好,稳定性也更高。考察了Al掺杂量、煅烧温度、煅烧时间等制备条件对催化剂催化活性的影响,确定了最佳制备条件。结果表明:当Al掺杂量为40%,煅烧温度为700℃,煅烧时间为2 h,催化剂的催化活性最高,且Al/α-Fe_2O_3降解酸性大红符合伪一级动力学方程,催化剂在连续使用7次后,仍然保持较高的催化效果。α-Fe2O3 was prepared by the way of hydrothermal. Ag / α-Fe2O3,Al/α-Fe2O3,Zn /α-Fe2O3,and Cu /α-Fe2O3 catalyst were synthesized by using α-Fe2O3 as active component by impregnation method,and then compared the catalytic activity. X-ray diffraction,scanning electron microscope,energy dispersive spectrometer,fourier transform infrared spectroscopy were applied to characterize the structure and morphology of Al / Fe2O3 catalyst. Theα-Fe2O3 catalyst loading with aluminum had a higher catalytic activity and stability comparing with pure α-Fe2O3.The influence of the content of Al loading,the calcining temperature and calcining time were studied,and found that the best loading content of Al was 40%,the roasting temperature was 700 ℃,and the roasting time was 2 h. The degradation of acid red GR in simulated wastewater by Al / α-Fe2O3 was fit to pseudo-first-order kinetics and the catalyst still maintain a high catalytic effect after reused for seven times.

关 键 词：Α-FE2O3 Al/α-Fe2O3 浸渍法 酸性大红 

分 类 号：X703.1[环境科学与工程—环境工程]