黑龙江大学自然科学学报
黑龍江大學自然科學學報
흑룡강대학자연과학학보
JOURNAL OF NATURAL SCIENCE OF HEILONGJIANG UNIVERSITY
2009年
3期
385-389
,共5页
陈利强%CHEN Gabriel%朱宇君%袁福龙
陳利彊%CHEN Gabriel%硃宇君%袁福龍
진리강%CHEN Gabriel%주우군%원복룡
钙钛矿%类钙钛矿%NOx%催化分解
鈣鈦礦%類鈣鈦礦%NOx%催化分解
개태광%류개태광%NOx%최화분해
perovskite%perovskite-like%Nox%direct decomposition
用柠檬酸络合爆炸法合成了碱土金属Ba掺杂的La2-xBaxCuO4,用溶胶-凝胶法制备了Ba掺杂的La1-x,BaxFeO3作为NO分解的催化剂,通过XRD表征了其物相结构,考察了制备系列催化剂催化分解NO的活性.结果表明:碱土金属Ba的取代可明显改善复合氧化物的NO催化分解活性,Ba的掺入有效提高了样品的氧化能力,使得催化效率得以提高.
用檸檬痠絡閤爆炸法閤成瞭堿土金屬Ba摻雜的La2-xBaxCuO4,用溶膠-凝膠法製備瞭Ba摻雜的La1-x,BaxFeO3作為NO分解的催化劑,通過XRD錶徵瞭其物相結構,攷察瞭製備繫列催化劑催化分解NO的活性.結果錶明:堿土金屬Ba的取代可明顯改善複閤氧化物的NO催化分解活性,Ba的摻入有效提高瞭樣品的氧化能力,使得催化效率得以提高.
용저몽산락합폭작법합성료감토금속Ba참잡적La2-xBaxCuO4,용용효-응효법제비료Ba참잡적La1-x,BaxFeO3작위NO분해적최화제,통과XRD표정료기물상결구,고찰료제비계렬최화제최화분해NO적활성.결과표명:감토금속Ba적취대가명현개선복합양화물적NO최화분해활성,Ba적참입유효제고료양품적양화능력,사득최화효솔득이제고.
The complex oxides La2-xBaxCuO4 with perovskite-like structure and La1-xBaxFeO3 with perovskite structure have been synthesized by citrate combustion method and sol-gel method,respectively.They were analyzed by XRD to explore their composition and structure.When Ba2+ replaced La3+,the samples had the perovskite phase LaCuO3 and BaCO3 phase along with the amount of Ba doping increased.A decrease intensity and a broad shape in the characteristic diffraction line of LaFeO3 and phase with further increasing Ba amount(x≥0.15)is also observed,which reveals that the crystal structure is distorted with the increase in Ba content.Meanwhile,BaCO3 phase(witherite phase)appears at 2θ=23.7.The catalytic activity for NO decomposition was then observed.It was found that the samples in which Ba substituted for La had improved catalytic activity.The Ba substitution promotes the redox capability of catalysts and improves the mobility of lattice oxygen,which explains the enhanced catalytic performance.