CAJ | 학술논문

通过简单的离子交换方法成功合成了铁钛双金属共柱撑膨润土催化剂,并利用N_2吸附、X射线衍射和等离子体发射光谱对所合成的样品进行了表征.以苯酚为目标污染物,考察了pH值、催化剂的投加量以及双氧水的加入量等对苯酚降解性能的影响.结果表明,在中性条件和紫外光照射下,铁钛双金属柱撑膨润土上苯酚降解率和矿化率都高达95%,且铁离子的溶出率始终低于2mg/L,均优于单一铁柱撑膨润土催化剂.经过五次循环测试,催化剂均表现出较高的活性.即使在碱性(pH=9.0)条件下,反应180min苯酚降解率也高达70.3%,表现出较好的酸碱适应性.并讨论了双金属柱撑土所具有较人的比表面积和较强的表面酸性与活性之间的关系.
통과간단적리자교환방법성공합성료철태쌍금속공주탱팽윤토최화제,병이용N_2흡부、X사선연사화등리자체발사광보대소합성적양품진행료표정.이분분위목표오염물,고찰료pH치、최화제적투가량이급쌍양수적가입량등대분분강해성능적영향.결과표명,재중성조건화자외광조사하,철태쌍금속주탱팽윤토상분분강해솔화광화솔도고체95%,차철리자적용출솔시종저우2mg/L,균우우단일철주탱팽윤토최화제.경과오차순배측시,최화제균표현출교고적활성.즉사재감성(pH=9.0)조건하,반응180min분분강해솔야고체70.3%,표현출교호적산감괄응성.병토론료쌍금속주탱토소구유교인적비표면적화교강적표면산성여활성지간적관계.
Fe-Ti pillared bentonite (Fe-Ti-B) was successfully prepared through a simple cation exchange reaction. The obtained sample was characterized by N_2 adsorption-desorption, X-ray powder diffraction, and inductively coupled plasma-atomic emission spectrometry. The effects of initial Ph, catalyst amount, and H_2O_2 concentration on photocatalysis-Fenton degradation of phenol were investigated in detail.The results showed that the conversion and mineralization rates of phenol were over 95% at pH = 6.6 under UV light irradiation. At the same time, the iron leaching rate was kept below 2 mg/L during the degradation process. The performance of the Fe-Ti-B catalyst is superior to Fe-pillared bentonite. Moreover, it still kept a high activity after 5 times run, indicating that Fe-Ti-B is a highly stable catalyst. The degradation rate of phenol could even reach 70.3% after 180 min under alkaline conditions (pH = 9.0). The excellent performance of Fe-Ti-B may be attributed to its large surface area and strong surface acidity.