Synthesis of FeAPO-5 molecular sieves with high iron contents via improved ionothermal method and their catalytic performances in phenol hydroxylation

doi:10.1007/s10934-017-0511-1

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	Synthesis of FeAPO-5 molecular sieves with high iron contents via improved ionothermal method and their catalytic performances in phenol hydroxylation
	Zhao, Xinhong; Zhang, Xiaoxiao; Hao, Zhixin; Gao, Xiangping; Liu, Zhong
刊名	JOURNAL OF POROUS MATERIALS
	2018-08
卷号	25 期号:4 页码:1007-1016
ISSN号	1380-2224
DOI	10.1007/s10934-017-0511-1
英文摘要	To synthesize zeolites in a safe and cost-saving manner is the first and the most important task for zeolite application in industry. In the present work, FeAPO-5 aluminophosphate molecular sieve with high iron content was ionothermally synthesized by microwave irradiation at ambient pressure using low dosage of eutectic mixture as the solvent. The influences of seed crystals and mechanochemical pretreatment on the synthesis of FeAPO-5 were investigated in detail. The resultant relatively pure FeAPO-5 molecular sieves were characterized by XRD, ICP-AES, SEM, N-2 physisorption and UV-Vis diffuse reflectance spectrometer, and their catalytic performances were studied using phenol hydroxylation as a probe reaction. The XRD results revealed that pure FeAPO-5 can be readily obtained from mechanochemically pretreated reactants, regardless of whether or not the seed crystals were added. The ICP-AES measurements suggested that only by using specific seed crystals can pure FeAPO-5 molecular sieve with high iron content be synthesized. The SEM analysis implied that seed crystals may play a role of morphology-directing agent in these syntheses. The catalytic results demonstrated that longer pronounced induction period were only observed over those FeAPO-5 catalysts with sole framework iron species. The different catalytic activity among five selected catalysts was largely determined by their different densities of framework iron species, while the selectivity towards dihydroxybenzene was mainly controlled by the diffusion path length. Under given reaction conditions, FeAPO-5 catalyst with up to 6.79 wt% of iron content gave 42.0% dihydroxybenzene yield with a selectivity of 94.1%.
内容类型	期刊论文
源URL	[http://ir.isl.ac.cn/handle/363002/34479]
专题	青海盐湖研究所_盐湖资源与化学实验室
推荐引用方式 GB/T 7714	Zhao, Xinhong,Zhang, Xiaoxiao,Hao, Zhixin,et al. Synthesis of FeAPO-5 molecular sieves with high iron contents via improved ionothermal method and their catalytic performances in phenol hydroxylation[J]. JOURNAL OF POROUS MATERIALS,2018,25(4):1007-1016.
APA	Zhao, Xinhong,Zhang, Xiaoxiao,Hao, Zhixin,Gao, Xiangping,&Liu, Zhong.(2018).Synthesis of FeAPO-5 molecular sieves with high iron contents via improved ionothermal method and their catalytic performances in phenol hydroxylation.JOURNAL OF POROUS MATERIALS,25(4),1007-1016.
MLA	Zhao, Xinhong,et al."Synthesis of FeAPO-5 molecular sieves with high iron contents via improved ionothermal method and their catalytic performances in phenol hydroxylation".JOURNAL OF POROUS MATERIALS 25.4(2018):1007-1016.