介孔Pt-Fe/Al_(2)O_(3)强化类芬顿催化降解罗丹明B性能与机理  

Performance and mechanism of mesoporous Pt-Fe/Al_2O_(3) enhanced Fenton like catalytic degradation of Rhodamine B

作　　者：蒲浩 王雁[2] 郭泽宇[1] 胡干琳 赵旭[2] PU Hao;WANG Yan;GUO Zeyu;HU Ganlin;ZHAO Xu(School of Materials Science and Art Design,Inner Mongolia Agricultural University,Hohhot 010018;Key Laboratory of Drinking Water Science and Technology,Research Center for Eco-Environmental Sciences,Chinese Academy of Sciences,Beijing 100085)

机构地区：[1]内蒙古农业大学,材料科学与艺术设计学院,呼和浩特010018 [2]中国科学院生态环境研究中心,饮用水科学与技术重点实验室,北京100085

出　　处：《环境科学学报》2024年第7期83-94,共12页Acta Scientiae Circumstantiae

基　　金：国家自然科学基金(No.52270083,52030003)。

摘　　要：以蒸发诱导自组装法制备了介孔氧化铝载体,然后通过浸渍法制备了Pt-Fe/Al_(2)O_(3)异相类芬顿催化剂,制备的Pt-Fe/Al_(2)O_(3)催化剂可高效活化H_(2)O_(2)氧化降解有机污染物.首先对比了国内外不同厂家生产的造孔剂P123对氧化铝载体比表面积和物相结构的影响,进而表征了Pt-Fe/Al_(2)O_(3)的理化结构与催化性能.结果表明,在0.2 g·L^(-1)Pt-Fe/Al_(2)O_(3)、p H=3、H_(2)O_(2)浓度为10 mmol·L^(-1)的条件下,所制备催化剂在30 min内对20 mg·L^(-1)罗丹明B(Rh B)溶液的降解效率达到97.71%.介孔Pt-Fe/Al_(2)O_(3)具有较好的循环使用稳定性,并对Rh B、甲基橙(MO)、亚甲基蓝(MBT)等多种有机污染物均具有良好的降解效果,是一种有前景的异相类芬顿催化剂.猝灭实验和ESR结果表明,·OH和^(1)O_(2)是Rh B降解的主要活性物种.In this paper,mesoporous alumina supports were prepared by evaporation-induced self-assembly method,and then Pt-Fe/Al_(2)O_(3)heterogeneous Fenton-like catalysts were prepared by impregnation method,and the prepared Pt-Fe/Al_(2)O_(3) catalysts could efficiently activate H_(2)O_(2) for oxidative degradation of organic pollutants.Firstly,the effects of P123,a pore-forming agent produced by different manufacturers,on the specific surface area and pore structure of alumina supports were compared,and then the physicochemical structure and catalytic properties of Pt-Fe/Al_(2)O_(3) were characterized.The results showed that 97.71% degradation of 20 mg·L^(-1) Rhodamine B(RhB) solution was achieved within 30 min at the conditions of 0.2 g·L^(-1) Pt-Fe/Al_(2)O_(3),pH=3,and H_(2)O_(2) concentration of 10 mmol·L^(-1).Mesoporous Pt-Fe/Al_(2)O_(3) is a promising hetero-Fenton-like catalyst with good recycling stability and good degradation ability on a wide range of organic pollutants such as RhB,Methyl orange(MO),and Methylene blue(MBT).Radical quenching experiments and ESR results indicated that ·OH and ^(1)O_(2) were the main active species for RhB degradation.

关 键 词：类芬顿催化 介孔氧化铝 Pt-Fe/Al_(2)O_(3) 罗丹明B 降解 

分 类 号：X703[环境科学与工程—环境工程]