CAJ | 학술논문

采用水热法制备ZnMnAl-CO3类水滑石,再经焙烧制备纳米锌锰铝三元复合金属氧化物光催化剂.采用X射线衍射表征了催化剂的组成结构.在模拟太阳光下,通过光催化降解甲基橙和还原CO2来考察样品的光催化活性,并探讨论了各种金属离子比、焙烧前后及焙烧温度对光催化活性的影响.结果表明：当锌、锰和铝的摩尔比为3：1：1、400℃焙烧时所得的样品,具有很强的CO2还原活性,明显优于对甲基橙的降解.当NaOH与Na2SO3的质量比为1.6：5.04时,催化剂加入量为1g/L,反应6h所得CO2的主要还原产物甲醇最多,峰面积达89.7%,说明该样品对减排温室气体具有潜在的应用前景.
채용수열법제비ZnMnAl-CO3류수활석,재경배소제비납미자맹려삼원복합금속양화물광최화제.채용X사선연사표정료최화제적조성결구.재모의태양광하,통과광최화강해갑기등화환원CO2래고찰양품적광최화활성,병탐토론료각충금속리자비、배소전후급배소온도대광최화활성적영향.결과표명：당자、맹화려적마이비위3：1：1、400℃배소시소득적양품,구유흔강적CO2환원활성,명현우우대갑기등적강해.당NaOH여Na2SO3적질량비위1.6：5.04시,최화제가입량위1g/L,반응6h소득CO2적주요환원산물갑순최다,봉면적체89.7%,설명해양품대감배온실기체구유잠재적응용전경.
ZnMnAl-LDHs have been prepared via hydrothermal method. ZnMnAl mixed-metal oxide photocatalyst was derived from a ternary hydrotalcite-like precursor followed by controllable calcination temperature. The as-prepared samples were characterized by X-ray diffraction (XRD). The effects of the molar ratio of metal ion in the material, calcination before and after and calcination temperature on the structure and morphology of the as-prepared samples were investigated in detail. The results indicated that a single layered double hydroxide (LDH) precursor leads to a well-crystalline ternary oxide photocatalyst. The photocatalyst shows superior photocatalytic reduction of CO2 compared to the photodegradation of methyl orange (MO) under simulated sunlight irradiation. When the mass ratio of NaOH to NaCO3 is 1.6:5.04, the amount of photocatalyst is 1 g/L, the highest methanol yield can be obtained in 6 hours, most chromatographic area reached 89.7%. The present work demonstrated their potential as photocatalysts for photocatalytic CO2 reduction.