Magnetically recyclable nanocatalysts (MRNCs): a versatile integration of high catalytic activity and facile recovery

Zhang, Donghui; Zhou, Chao; Sun, Zhenhua; Wu, Li‐Zhu; Tung, Chen‐Ho; Zhang, Tierui

doi:10.1039/c2nr31929b

Cited by 146 publications

(52 citation statements)

References 204 publications

(266 reference statements)

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“…The design, fabrication and control of nanostructured materials are the core issues in catalysis and nanotechnology [94][95][96]. Carbon nanostructures, as typical inorganic materials, such as carbon nanotube, graphene, mesoporous carbon, have received a great deal of attention due to its wide applications [97][98][99][100].…”

Section: From Cds To Mesoporous Carbons Catalyst [93]mentioning

confidence: 99%

Catalytic Applications of Carbon Dots

Kang

Liu

2016

Carbon Nanostructures

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Carbon materials have been used for a long time in heterogeneous catalysis, which can satisfy most of the desirable properties required for a suitable catalyst support. Based on their significant advantages, such as low cost, huge amount, easy accessibility, high surface area, diverse porous structure, and resistance to acidic or basic environments, the carbon nanostructures are hungered for using as proper catalysts directly. Carbon dots (CDs), a new class of carbon nanomaterials with sizes below 10 nm, were also demonstrated to be efficient catalysts, such as, photocatalysts for selective oxidation, light-driven acid-catalysis and hydrogen bond catalysis. In this chapter, we will highlight the preparative methods, which have been used successfully to produce active, selective and durable CDs catalysts and look at their properties and the reactions which they promote. We then consider the catalysts design based on these new CDs and look into the future.

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Section: From Cds To Mesoporous Carbons Catalyst [93]mentioning

confidence: 99%

Catalytic Applications of Carbon Dots

Kang

Liu

2016

Carbon Nanostructures

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“…Therefore, it is necessary to bring into perspective the current developments in the tailoring and application of such materials in water treatment. A few reviews are available mainly on the synthesis, structure, and various applications of magnetic materials [83][84][85][86][87][88]. This review exclusively discusses the most recent developments in terms of the synthesis and exploitation of various magnetic nanocomposite photocatalysts in water pollution mitigation.…”

Section: Introductionmentioning

confidence: 99%

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Mamba

Mishra

2016

Catalysts

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Organic and inorganic compounds utilised at different stages of various industrial processes are lost into effluent water and eventually find their way into fresh water sources where they cause devastating effects on the ecosystem due to their stability, toxicity, and non-biodegradable nature. Semiconductor photocatalysis has been highlighted as a promising technology for the treatment of water laden with organic, inorganic, and microbial pollutants. However, these semiconductor photocatalysts are applied in powdered form, which makes separation and recycling after treatment extremely difficult. This not only leads to loss of the photocatalyst but also to secondary pollution by the photocatalyst particles. The introduction of various magnetic nanoparticles such as magnetite, maghemite, ferrites, etc. into the photocatalyst matrix has recently become an area of intense research because it allows for the easy separation of the photocatalyst from the treated water using an external magnetic field. Herein, we discuss the recent developments in terms of synthesis and photocatalytic properties of magnetically separable nanocomposites towards water treatment. The influence of the magnetic nanoparticles in the optical properties, charge transfer mechanism, and overall photocatalytic activity is deliberated based on selected results. We conclude the review by providing summary remarks on the successes of magnetic photocatalysts and present some of the future challenges regarding the exploitation of these materials in water treatment.

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“…To date, lipase has been immobilized on various supports such as silica spheres (Yang et al, 2013), magnetic nanoparticles (Park et al, 2011), chitosan (Chiou & Wu, 2004) etc., in which magnetic nanoparticles are present as new supporting materials, especially for Fe 3 O 4 nanoparticles. Fe 3 O 4 nanoparticles offer unique features, such as dynamic surface-to-volume ratio, high specific surface area, biocompatibility, convenience of recovery *Corresponding author, e-mail: jtkr@163.com Brought to you by | New York University Bobst Library Technical Services Authenticated Download Date | 6/29/15 11:36 AM with the response to magnetic force, so that they have been adopted in catalytic, biological and drug delivery fields (Laurent et al, 2008;Sun et al, 2008;Xu et al, 2012aXu et al, , 2012bTang et al, 2014;Reddy et al, 2012;Zhang et al, 2012;Mazur et al, 2013;Singamaneni et al, 2011;Gawande et al, 2013aGawande et al, , 2013b. However, Fe 3 O 4 nanoparticles are inclined to aggregate, oxidize and decompose, and thus it is essential to protect their surfaces from erosion.…”

Section: Introductionmentioning

confidence: 99%

Characterization and optimization of mesoporous magnetic nanoparticles for immobilization and enhanced performance of porcine pancreatic lipase

et al. 2015

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In this paper, Fe3O4 nanoparticles coated with mesoporous silica were prepared successfully, noted as Fe3O4 at the mobile composition of matter No. 41 (MCM-41). Also, Fe3O4 at MCM-41 was grafted by both 3-aminopropyltriethoxysilane (APTS) and 3-chloropropyltriethoxysilane (CPS), noted as Fe3O4 at MCM-41/APTS and Fe3O4 at MCM-41/CPS. The compounds were characterized by X-ray powder diffraction, scanning electron microscopy, transmission electron microscopy, Fourier transform infrared spectroscopy, vibrating sample magnetometry, thermogravimetry and N2 adsorption/desorption. Then, the enzyme, porcine pancreas lipase (PPL), was immobilized onto these modified nanoparticles by covalent attachment, physical adsorption and cross-linking, noted as Fe3O4 at MCM-41/CPS-PPL, Fe3O4 at MCM-41-PPL and Fe3O4 at MCM-41/APTS-PPL, respectively. The results showed that Fe3O4 at MCM-41/CPS was the best nanomaterial for PPL immobilization, exhibiting enhanced immobilization efficiency (maximum 96 %), maximum relative activity (up to 96 %), high stability and reusability (83 % 56 days and 86.7 % ten cycles). Additionally, it offered some other advantages, such as easy recycling and reuse, complying with the trend of green chemistry. Therefore, Fe3O4 at MCM-41/CPS in combination with a relevant method can be proposed for commercial applications.

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Magnetically recyclable nanocatalysts (MRNCs): a versatile integration of high catalytic activity and facile recovery

Cited by 146 publications

References 204 publications

Catalytic Applications of Carbon Dots

Catalytic Applications of Carbon Dots

Advances in Magnetically Separable Photocatalysts: Smart, Recyclable Materials for Water Pollution Mitigation

Characterization and optimization of mesoporous magnetic nanoparticles for immobilization and enhanced performance of porcine pancreatic lipase

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