CAJ | 학술논문

通过浸渍法制备了MCM-41负载铁催化剂Fe-MCM-41,采用XRD、UV-vis光谱、N2吸附-脱附分析和SEM等对Fe-MCM-41进行表征,结果表明,Fe-MCM-41具有载体MCM-41的介孔结构,孔道分布均匀,平均孔径1.88 nm.研究了以Fe-MCM-41为催化剂的类Fenton体系对甲基橙染料快速降解的方法,考察了分子筛中Fe含量、H2O2及甲基橙初始浓度、溶液pH和催化剂用量等条件对染料降解率的影响.当pH=3、H2O2及甲基橙初始浓度分别为30 mmol/L和20 mmol/L、催化剂用量为2 g/L、反应60 min时,甲基橙的降解率可达96.82%.动力学研究表明,采用Fe-MCM-41催化降解甲基橙遵循一级反应动力学模型(R=0.992),对应的速率常数为8.51×10-2 min-1.
통과침지법제비료MCM-41부재철최화제Fe-MCM-41,채용XRD、UV-vis광보、N2흡부-탈부분석화SEM등대Fe-MCM-41진행표정,결과표명,Fe-MCM-41구유재체MCM-41적개공결구,공도분포균균,평균공경1.88 nm.연구료이Fe-MCM-41위최화제적류Fenton체계대갑기등염료쾌속강해적방법,고찰료분자사중Fe함량、H2O2급갑기등초시농도、용액pH화최화제용량등조건대염료강해솔적영향.당pH=3、H2O2급갑기등초시농도분별위30 mmol/L화20 mmol/L、최화제용량위2 g/L、반응60 min시,갑기등적강해솔가체96.82%.동역학연구표명,채용Fe-MCM-41최화강해갑기등준순일급반응동역학모형(R=0.992),대응적속솔상수위8.51×10-2 min-1.
Loaded catalyst of Fe- MCM- 41 was prepared by impregnation method and characterized by means of XRD, UV- vis, N2 adsorption- desorption and SEM. The results indicated that Fe- MCM- 41 had typi?cal mesoporous structure features with uniform pore size distribution. The average pore diameter was 1.88 nm. Rapid decolorization of methyl orange by Fenton- like mesoporous Fe- MCM- 41 as catalyst was investi?gated. The effects of various parameters such as initial pH, initial H2O2 concentration, dosage of catalyst and initial dye concentration on decolorization rate were studied. The optimum reaction conditions were initial pH=3, the initial concentration of H2O2 30 mmol/L, the initial concentration of methylene blue 20 mmol/L, the dos?age of catalyst 2 g/L. The removal rate of methyl orange was 96.82% under the optimum conditions after 60 min of degradation time. The kinetic models indicated that the first order kinetics fit wel with the data (R=0.992) and the corresponding rate constant was 8.51×10- 2 min- 1.