Facile One-Pot Preparation of Chitosan/Calcium Pyrophosphate Hybrid Microflowers

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	Facile One-Pot Preparation of Chitosan/Calcium Pyrophosphate Hybrid Microflowers
	Wang, Xiaoli 1,2,3; Shi, Jiafu 1,3; Li, Zheng 1,3; Zhang, Shaohua 1,3; Wu, Hong 1,3; Jiang, Zhongyi 1,2,3; Yang, Chen 1,3; Tian, Chunyong 1,3
刊名	ACS APPLIED MATERIALS & INTERFACES
	2014-08-27
卷号	6 期号:16 页码:14522-14532
关键词	microflowers chitosan calcium pyrophosphate mineralization dye adsorption enzyme immobilization
ISSN号	1944-8244
其他题名	ACS Appl. Mater. Interfaces
中文摘要	Flower-like chitosan/calcium pyrophosphate hybrid microparticles (microflowers) are prepared using a facile one-pot approach by combining ionotropic gelation with biomimetic mineralization. Chitosan tripolyphosphate (CS-TPP) nanocomplexes are first synthesized through ionotropic gelation; meanwhile, excess TPP is partly hydrolyzed into pyrophosphate ions (P2O74-). Upon addition of CaCl2, CS-TPP nanocomplexes serve as a versatile template, inducing in situ mineralization of Ca2P2O7 and directing its growth and assembly into microflowers. The whole preparation process can be completed within half an hour. The as-prepared microflowers are composed of 23.0% CS-TPP nanocomplexes and 77.0% Ca2P2O7 crystals. Mesopores (3.7 and 11.2 nm) and macropores coexist in the microflowers, indicating porous and hierarchical structures. The microflowers exhibit high efficiency in dye adsorption and enzymatic catalysis. Specifically, a high adsorption capacity of 520 mg g(-1) for Congo red is achieved. And the immobilized enzyme retains about 85% catalytic activity compared with that of the free enzyme. The facile one-pot preparation process ensures the broad applications of the porous hybrid microflowers.
英文摘要	Flower-like chitosan/calcium pyrophosphate hybrid microparticles (microflowers) are prepared using a facile one-pot approach by combining ionotropic gelation with biomimetic mineralization. Chitosan tripolyphosphate (CS-TPP) nanocomplexes are first synthesized through ionotropic gelation; meanwhile, excess TPP is partly hydrolyzed into pyrophosphate ions (P2O74-). Upon addition of CaCl2, CS-TPP nanocomplexes serve as a versatile template, inducing in situ mineralization of Ca2P2O7 and directing its growth and assembly into microflowers. The whole preparation process can be completed within half an hour. The as-prepared microflowers are composed of 23.0% CS-TPP nanocomplexes and 77.0% Ca2P2O7 crystals. Mesopores (3.7 and 11.2 nm) and macropores coexist in the microflowers, indicating porous and hierarchical structures. The microflowers exhibit high efficiency in dye adsorption and enzymatic catalysis. Specifically, a high adsorption capacity of 520 mg g(-1) for Congo red is achieved. And the immobilized enzyme retains about 85% catalytic activity compared with that of the free enzyme. The facile one-pot preparation process ensures the broad applications of the porous hybrid microflowers.
WOS标题词	Science & Technology ; Technology
类目[WOS]	Nanoscience & Nanotechnology ; Materials Science, Multidisciplinary
研究领域[WOS]	Science & Technology - Other Topics ; Materials Science
关键词[WOS]	CALCIUM-PHOSPHATE ; IN-VITRO ; HIERARCHICAL STRUCTURE ; NANOPARTICLES ; HYDROXYAPATITE ; ADSORPTION ; WATER ; HYDROLYSIS ; MINERALIZATION ; DEPOSITION
收录类别	SCI
原文出处	://WOS:000341122000146
语种	英语
WOS记录号	WOS:000341122000146
公开日期	2014-09-30
内容类型	期刊论文
版本	出版稿
源URL	[http://ir.ipe.ac.cn/handle/122111/11542]
专题	过程工程研究所_研究所（批量导入）
作者单位	1.Tianjin Univ, Sch Chem Engn & Technol, Key Lab Green Chem Technol, Minist Educ, Tianjin 300072, Peoples R China 2.Chinese Acad Sci, Inst Proc Engn, Natl Key Lab Biochem Engn, Beijing 100190, Peoples R China 3.Collaborat Innovat Ctr Chem Sci & Engn Tianjin, Tianjin 300072, Peoples R China
推荐引用方式 GB/T 7714	Wang, Xiaoli,Shi, Jiafu,Li, Zheng,et al. Facile One-Pot Preparation of Chitosan/Calcium Pyrophosphate Hybrid Microflowers[J]. ACS APPLIED MATERIALS & INTERFACES,2014,6(16):14522-14532.
APA	Wang, Xiaoli.,Shi, Jiafu.,Li, Zheng.,Zhang, Shaohua.,Wu, Hong.,...&Tian, Chunyong.(2014).Facile One-Pot Preparation of Chitosan/Calcium Pyrophosphate Hybrid Microflowers.ACS APPLIED MATERIALS & INTERFACES,6(16),14522-14532.
MLA	Wang, Xiaoli,et al."Facile One-Pot Preparation of Chitosan/Calcium Pyrophosphate Hybrid Microflowers".ACS APPLIED MATERIALS & INTERFACES 6.16(2014):14522-14532.