Synthesis of Superparamagnetic Core-Shell Structure Supported Pd Nanocatalysts for Catalytic Nitrite Reduction with Enhanced Activity, No Detection of Undesirable Product of Ammonium, and Easy Magnetic Separation Capability

IMR OpenIR

	Synthesis of Superparamagnetic Core-Shell Structure Supported Pd Nanocatalysts for Catalytic Nitrite Reduction with Enhanced Activity, No Detection of Undesirable Product of Ammonium, and Easy Magnetic Separation Capability
	Sun, Wuzhu; Yang, Weiyi; Xu, Zhengchao; Li, Qi; Shang, Jian Ku; qili@imr.ac.cn
	2016
发表期刊	ACS APPLIED MATERIALS & INTERFACES
ISSN	1944-8244
卷号	8 期号:3 页码:2035-2047
摘要	Superparamagnetic nanocatalysts could minimize both the external and internal mass transport limitations and neutralize OH produced in the reaction more effectively to enhance the catalytic nitrite reduction efficiency with the depressed product selectivity to undesirable ammonium, while possess an easy magnetic separation capability. However, commonly used qusi-monodispersed superparamagnetic Fe3O4 nanosphere is not suitable as catalyst support for nitrite reduction because it could reduce the catalytic reaction efficiency and the product selectivity to N2, and the iron leakage could bring secondary contamination to the treated water. In this study, protective shells of SiO2, polymethylacrylic acid, and carbon were introduced to synthesize Fe3O4@SiO2/Pd, Fe3O4@PMAA/Pd, and Fe3O4@C/Pd catalysts for catalytic nitrite reduction. It was found that SiO2 shell could provide the complete protection to Fe3O4 nanosphere core among these shells. Because of its good dispersion, dense structure, and complete protection to Fe3O4, the Fe3O4@SiO2/Pd catalyst demonstrated the highest catalytic nitrite reduction activity without the detection of NH4 produced. Due to this unique structure, the activity of Fe3O4@SiO2/Pd catalysts for nitrite reduction was found to be independent of the Pd nanoparticle size or shape, and their product selectivity was independent of the Pd nanopartide size, shape, and content. Furthermore, their superparamagnetic nature and high saturation magnetization allowed their easy magnetic separation from treated water, and they also demonstrated a good stability during the subsequent recycling experiment.
部门归属	[sun, wuzhu ; yang, weiyi ; li, qi] chinese acad sci, inst met res, shenyang natl lab mat sci, shenyang 110016, liaoning, peoples r china ; [xu, zhengchao] zhangjiagang green tech environm protect equipmen, zhangjiagang 215625, jiangsu, peoples r china ; [shang, jian ku] univ illinois, dept mat sci & engn, urbana, il 61801 usa
关键词	Catalytic Nitrite Reduction Superparamagnetic Core Protective Layer Product Selectivity Fe3o4@sio2/pd
资助者	Youth Innovation Promotion Association, Chinese Academy of Sciences [Y2N5711171]; Basic Science Innovation Program of Shenyang National Laboratory for Materials Science [Y4N56R1161, Y4N56F2161]
收录类别	sci
语种	英语
WOS记录号	WOS:000369044100059
引用统计	被引频次：26[WOS] [WOS记录] [WOS相关记录]
文献类型	期刊论文
条目标识符	http://ir.imr.ac.cn/handle/321006/75166
专题	中国科学院金属研究所
通讯作者	qili@imr.ac.cn
推荐引用方式 GB/T 7714	Sun, Wuzhu,Yang, Weiyi,Xu, Zhengchao,et al. Synthesis of Superparamagnetic Core-Shell Structure Supported Pd Nanocatalysts for Catalytic Nitrite Reduction with Enhanced Activity, No Detection of Undesirable Product of Ammonium, and Easy Magnetic Separation Capability[J]. ACS APPLIED MATERIALS & INTERFACES,2016,8(3):2035-2047.
APA	Sun, Wuzhu,Yang, Weiyi,Xu, Zhengchao,Li, Qi,Shang, Jian Ku,&qili@imr.ac.cn.(2016).Synthesis of Superparamagnetic Core-Shell Structure Supported Pd Nanocatalysts for Catalytic Nitrite Reduction with Enhanced Activity, No Detection of Undesirable Product of Ammonium, and Easy Magnetic Separation Capability.ACS APPLIED MATERIALS & INTERFACES,8(3),2035-2047.
MLA	Sun, Wuzhu,et al."Synthesis of Superparamagnetic Core-Shell Structure Supported Pd Nanocatalysts for Catalytic Nitrite Reduction with Enhanced Activity, No Detection of Undesirable Product of Ammonium, and Easy Magnetic Separation Capability".ACS APPLIED MATERIALS & INTERFACES 8.3(2016):2035-2047.