Novel reverse microemulsion and its application to synthesis of nanostructured La0.95Ba0.05MnAl11O19-alpha catalyst for methane combustion

	Novel reverse microemulsion and its application to synthesis of nanostructured La0.95Ba0.05MnAl11O19-alpha catalyst for methane combustion
	Xu, JG ; Teng, F ; Tian, ZJ ; Qu, XH ; Zhang, PQ ; Xu, YP ; Xiong, GX ; Lin, LW
刊名	acta chimica sinica
	2005-12-28
卷号	63 期号:24 页码:2205-2210
关键词	methane catalytic combustion reverse microemulsion hexaaluminate n-butanol i-propanol
英文摘要	a novel type of reverse microemulsion system composed of water, i-propanol and n-butanol was developed as a reaction medium to prepare substituted-hexaaluminate la0.95ba0.05mnal11o19-alpha catalyst for methane combustion. the structure and properties of water in the novel reverse microemulsion system were investigated by means of h-1 nmr, ft-ir, electrical conductometry and laser light scattering apparatus. the electric conductivity of the novel reverse microemulsion system followed a nonlinear correlation when the volume fraction of water was low. there existed a critical point of phi(p) (0.15) along the k similar to phi curve. h-1 nmr revealed that the chemical shift of the water proton signal moved to upfield with decreasing water content. ftir showed that the nu(o-d) band was shifted to higher frequency with increasing water concent. the size distribution of the al(oh)(3) gel particles formed by hydrolysis of al(i-oc3h7)(3) in the novel reverse microemulsion ranged from 226 to 329 nm with the average diameter of 267 nm. substituted hexaaluminate la0.95ba0.05mnal11o19-alpha synthesized in the novel reverse microemulsion system possesses a surface area of 65 m(2)/g, comparable to 32 m(2)/g of similar samples prepared with pure water. xrd measurements revealed that beta-al2o3 was the only phase for this catalyst after calcination at 1200 degrees c for 10 h and its particle size measured by tem is about 30 nm. this nanostructured hexaaluminate, when used as a catalyst for ch4 combustion, allowed a light-off of a stream of 1% ch4 in air at 420 degrees c, as compared to 5 10 degrees c required for similar catalyst prepared with pure water. the excellent low-temperature catalytic activity of this catalyst arised from the formation of nanostrctured hexaaluminate that contained larger amount of manganese.
WOS标题词	science & technology ; physical sciences
类目[WOS]	chemistry, multidisciplinary
研究领域[WOS]	chemistry
关键词[WOS]	water ; temperature ; systems ; bamnal11o19-alpha ; nanoparticles ; ir
收录类别	SCI
语种	英语
WOS记录号	WOS:000234157000005
公开日期	2015-11-10
内容类型	期刊论文
源URL	[http://159.226.238.44/handle/321008/139873]
专题	大连化学物理研究所_中国科学院大连化学物理研究所
作者单位	1.Inst Appl Catalysis, Yantai 264005, Peoples R China 2.Chinese Acad Sci, Dalian Inst Chem Phys, Lab Nat Gas Utilizat & Appl Catalysis, Dalian 116023, Peoples R China 3.Chinese Acad Sci, Dalian Inst Chem Phys, State Key Lab Catalysis, Dalian 116023, Peoples R China
推荐引用方式 GB/T 7714	Xu, JG,Teng, F,Tian, ZJ,et al. Novel reverse microemulsion and its application to synthesis of nanostructured La0.95Ba0.05MnAl11O19-alpha catalyst for methane combustion[J]. acta chimica sinica,2005,63(24):2205-2210.
APA	Xu, JG.,Teng, F.,Tian, ZJ.,Qu, XH.,Zhang, PQ.,...&Lin, LW.(2005).Novel reverse microemulsion and its application to synthesis of nanostructured La0.95Ba0.05MnAl11O19-alpha catalyst for methane combustion.acta chimica sinica,63(24),2205-2210.
MLA	Xu, JG,et al."Novel reverse microemulsion and its application to synthesis of nanostructured La0.95Ba0.05MnAl11O19-alpha catalyst for methane combustion".acta chimica sinica 63.24(2005):2205-2210.