层状锌铝双金属氧化物的制备及其吸附-光催化性能  

Preparation and adsorption⁃photocatalytic performance of ZnAl@layered double oxides

作　　者：章萍[1] 赵晨晨 崔潇匀 谢冰 刘依涵 林海玉 张佳乐 谌宇楠 ZHANG Ping;ZHAO Chenchen;CUI Xiaoyun;XIE Bing;LIU Yihan;LIN Haiyu;ZHANG Jiale;CHEN Yu’nan(School of Resources and Environment,Nanchang University,Nanchang 330031,China;Center of Analysis and Testing,Nanchang University,Nanchang 330031,China;School of Physics and Materials Science,Nanchang University,Nanchang 330031,China)

机构地区：[1]南昌大学资源与环境学院,南昌330031 [2]南昌大学分析测试中心,南昌330031 [3]南昌大学物理与材料学院,南昌330031

出　　处：《无机化学学报》2024年第10期1965-1974,共10页Chinese Journal of Inorganic Chemistry

基　　金：国家自然科学基金(No.52160020);江西省重点研发计划项目“揭榜挂帅”(No.JXNK202306⁃04)资助。

摘　　要：采用前驱体煅烧法制备具有吸附-光催化双功能的层状锌铝双金属氧化物(LDOs)。通过X射线衍射(XRD)、傅里叶变换红外光谱(FTIR)、紫外可见漫反射光谱(UV⁃Vis DRS)、扫描电子显微镜(SEM)等表征探究了双金属比例、煅烧温度对其吸附-光催化降解四环素(TC)性能的影响。结果表明,当Zn、Al物质的量之比为2∶1,煅烧温度为400℃时,可形成具有优异吸附-光催化活性的Zn_(2)Al_(1)@LDO_(400)。吸附实验表明,Zn_(2)Al_(1)@LDO_(400)对TC是化学吸附限制的非均相单分子层吸附,且高温利于吸附。利用自由基猝灭实验结合电子顺磁共振(EPR)测试证实光生空穴(h^(+))、羟基自由基(·OH)、超氧自由基(·O_(2)^(-))作为活性物种参与TC的协同降解。The precursor⁃calcination approach was employed to fabricate ZnAl@layered double oxides(LDOs)with dual functionality with adsorption and photocatalysis.The effect of bimetallic ratios and calcination temperatures on the adsorption⁃photocatalytic degradation of tetracycline(TC)was systematically investigated by X⁃ray powder dif⁃fraction(XRD),infrared spectroscopy(FTIR),ultraviolet⁃visible diffuse reflection spectroscopy(UV⁃Vis DRS),and scanning electron microscope(SEM).The results indicated that a molar ratio of 2∶1 for Zn to Al and a calcination temperature of 400℃resulted in Zn_(2)Al_(1)@LDO_(400)with outstanding adsorption⁃photocatalytic activity.Moreover,adsorption studies revealed that Zn_(2)Al_(1)@LDO_(400)displayed the chemisorption⁃limited heterogeneous monolayer adsorption for TC,with higher temperatures promoting the adsorption process.Simultaneously,the collaborative deg⁃radation of TC by photogenerated holes(h^(+)),hydroxyl radicals(·OH),and superoxide radicals(·O_(2)^(-))was confirmed through free radical quenching experiments and electron paramagnetic resonance(EPR)tests.

关 键 词：双金属氧化物 四环素 吸附-光催化 协同降解 

分 类 号：TQ172[化学工程—水泥工业] O614.31[化学工程—硅酸盐工业] O614.241[理学—无机化学]