Synthesis and characterization of germanium, copper- and   cobalt-substituted ITH-zeotype materials

doi:10.1007/s10853-016-9799-5

CORC > 北京大学 > 化学与分子工程学院

	Synthesis and characterization of germanium, copper- and cobalt-substituted ITH-zeotype materials
	Shi, Lei ; Yu, Tingting ; Lin, Sen ; Lin, Cong
刊名	JOURNAL OF MATERIALS SCIENCE
	2016
关键词	HYDROTHERMAL SYNTHESIS CATALYTIC-PROPERTIES 12-RING CHANNELS MOLECULAR-SIEVES BUILDING UNITS SIBEA ZEOLITE PORE ZEOLITE GERMANOSILICATE CU FRAMEWORK
DOI	10.1007/s10853-016-9799-5
英文摘要	ITH-type germanosilicate, Cu- and Co-containing ITH-zeotype materials, were synthesized by the hydrothermal method in the presence of an organic structure-directing agent, N,N,N',N'-tetramethyl-1,6-hexanediamine. The effects of reaction compositions, including the molar ratios of SiO2/GeO2, SiO2/H2O, and MeO/SiO2 (Me = Cu and Co transition atoms) on the synthesis of the pure product were investigated. The synthesized samples were characterized by powder and single-crystal X-ray diffractions, scanning electron microscopy, inductively coupled plasma (ICP) analysis, energy dispersive spectrometry, thermogravimetric analysis, UV-Vis diffuse reflectance spectrum (DRS) measurements, X-ray photoelectron spectroscopy, and N-2 adsorption and desorption analysis. The results reveal that the concentration of H2O in the reaction mixture has an important impact on the synthesis of pure ITH-type zeolite. The framework's Si/Ge ratio is slightly changed from 3.1 to 3.9 when the initial SiO2/GeO2 molar ratio is increased from 0.8 to 10. Structure refinement results show that the Ge atoms preferably occupy sites in the double-four ring units. Cu and Co atoms have been introduced for the first time into ITH-type materials. The trace amounts of amorphous Cu-and Co-compounds in the resulting materials can be readily detected by backscattered electron imaging, so that pure samples can be selected for ICP and UV-Vis DRS measurements.; National Natural Science Foundation of China [51202134, 51472256]; Shandong Province Young and Middle-Aged Scientists Research Awards Fund [BS2012CL027]; Program for Scientific Research Innovation Team in Colleges and Universities of Shandong Province; SCI(E); EI; ARTICLE; qg_shilei@163.com; 10; 4942-4951; 51
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/437355]
专题	化学与分子工程学院
推荐引用方式 GB/T 7714	Shi, Lei,Yu, Tingting,Lin, Sen,et al. Synthesis and characterization of germanium, copper- and cobalt-substituted ITH-zeotype materials[J]. JOURNAL OF MATERIALS SCIENCE,2016.
APA	Shi, Lei,Yu, Tingting,Lin, Sen,&Lin, Cong.(2016).Synthesis and characterization of germanium, copper- and cobalt-substituted ITH-zeotype materials.JOURNAL OF MATERIALS SCIENCE.
MLA	Shi, Lei,et al."Synthesis and characterization of germanium, copper- and cobalt-substituted ITH-zeotype materials".JOURNAL OF MATERIALS SCIENCE (2016).