(1. 華南理工大學 環(huán)境科學與工程學院，廣州 510640；2. 集美大學 環(huán)境工程研究所，廈門 361021)
摘 要: 采用超聲浸漬法和普通浸漬法制備具有相同鐵負載量的Ce-Fe/Al2O3催化劑，以解決光Fenton反應過程中催化劑活性低的問題。通過掃描電鏡(SEM)、氫程序升溫還原(H2-TPR)、紫外可見漫反射(DRS)、比表面積分析(BET)及XPS等手段分別表征催化劑的表面形貌、還原性能、光吸收特性、比表面積特性及活性組分鐵的價態(tài)和表面分布，利用媒介黃的光Fenton脫色反應考察催化劑的活性和穩(wěn)定性。結(jié)果表明：超聲浸漬20 min使活性組分Fe2O3分散均勻，有效抑制Fe2O3顆粒的長大，增加催化劑對光的吸收；比表面積從221.3 增大到247.8 m2/g，改善了催化劑的微孔結(jié)構(gòu)；催化劑表面鐵含量從0.24%提高到0.38%，提高了催化劑的催化活性。在pH6.0條件下，60 min內(nèi)可使200 mg/L媒介黃完全脫色。
關(guān)鍵字: 水處理；高級氧化；光Fenton反應；非均相催化劑；超聲
（1. School of Environmental Science and Engineering, South China University of Technology,Guangzhou 510640, China;2. Institute of Environmental Engineering, Jimei University, Xiamen 361021, China）
Abstract:Abstract: Ce-Fe/Al2O3 catalysts possessing the same iron load amount were prepared with and without ultrsonic assitant during the impregnation step to solve the problem of low activity of catalyst in the process of photo-Fenton reaction. The surface morphology, reduction property, optical absorption characteristic, BET surface area and valency of Fe and surface distribution of catalysts were characterized through SEM, H2-TPR, DRS, BET and XPS analysis respectively. Activity and stability of catalysts were estimated by utilizing photo-Fenton decoloration reaction of medium yellow (MY10). The results show that catalyst prepared by ultrasonic treatment for 20 min causes activated component Fe2O3 to be highly dispersed. The growth of Fe2O3 particles is inhibited and the optical absorption increases. BET surface area increases from 221.3 to 247.8 m2/g and micropore structure is improved. The Fe content in catalyst surface increases from 0.24% to 0.38% and the catalytic activity of catalyst is improved. This catalyst can cause discoloring of MY10 under the condition of pH 6.0 in 60 min.
Key words: water treatment; advanced oxidation; photo-Fenton reaction; heterogeneous catalyst; ultrasonic
