中南大学学报（自然科学版）2017，Vol.48Issue(1)：39-46,8.DOI:10.11817/j.issn.1672-7207.2017.01.006
合成体系中NO3-与HMT的物质的量比对AlOOH结构及催化性能的影响
Effects of molar ratio of NO3 to HMT on structure and catalytic performances of AlOOH
摘要
Abstract
AlOOH were fabricated by hexamine (HMT) hydrolysis method through modulating the molar ratio of NO3 to HMT (n(NO3-)/n(HMT) and their catalytic performances toward synthesis of benzoin ethyl ether from benzaldehyde and ethanol were evaluated.Samples obtained at various molar ratio of NO3-to HMT were characterized by XRD,FT-IR,TG-DTG,BET,TEM and NH3-TPD-MS.The results show that AlOOH obtained at different molar ratios of NO3-to HMT has different structures and morphologies.The further evaluation of catalytic activity demonstrates that ambient atmosphere can alter the structure of AlOOH,which has a significant effect on the catalytic behavior.All synthesized catalysts present 100％ selectivity of benzoin ethyl ether under following reaction condition:temperature 70 ℃,benzaldehyde 3 mL,ethanol 40 mL,catalyst 0.2 g,reaction time 40 min,at higher molar ratio of NO3-to HMT,AlOOH displays fine catalytic activity (68.9％ conversion of benzaldehyde),while at lower molar ratio of NO3-to HMT a poor activity (32.3％ conversion of benzaldehyde) is obtained and at neutral ambient atmosphere there is almost no catalytic activity (3.08％ conversion of benzaldehyde).The totally different catalytic activity has close relation to the structures and morphologies of AlOOH synthesized under different pH values,and the amount of acid is responsible for the different catalytic performances.关键词
HMT水热分解/AlOOH/催化性能/苯甲醛/安息香乙醚Key words
HMT hydrolysis/AIOOH/catalytic performances/benzaldehyde/benzoin ethyl ether分类
化学化工引用本文复制引用
吴旭,阴青青,黄艳丽,杜亚丽,谢鲜梅..合成体系中NO3-与HMT的物质的量比对AlOOH结构及催化性能的影响[J].中南大学学报（自然科学版）,2017,48(1):39-46,8.基金项目
化工资源有效利用国家重点实验室开放基金资助项目(CRE-2015-C-106) （CRE-2015-C-106）
山西省自然科学基金资助项目(201601D102007) (Project(CRE-2015-C-106) supported by State Key Laboratory of Chemical Resource Engineering （201601D102007）
Project(201601D102007)supported by the Natural Science Foundation of Shanxi Province,China) （201601D102007）
