A Cu–m-phenylenediamine complex induced route to fabricate poly(m-phenylenediamine)/reduced graphene oxide hydrogel and its adsorption application

Chai, Liyuan; Wang, Ting; Zhang, Liyuan; Wang, Haiying; Yang, Weichun; Dai, Shuyan; Yang, Meng; Li, Xiaorui

doi:10.1016/j.carbon.2014.10.018

Cited by 81 publications

(55 citation statements)

References 63 publications

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“…932.46 eV for Mont-EH-DT-Cu and 931.82 eV for Mont-HCF). This response, which is characteristic of Cu + species (~ 932 eV), appears as a result of the redox reaction of the chelated Cu 2+ with the amino groups 31 . This peak becomes even more pronounced in the case of Mont-HCF when the ferrocyanide ([Fe(CN)6] 4-) is immobilized with the C N coordinating to the copper-DT complex.…”

Section: I) Organic Modification Of the Clay Particles With The Catiomentioning

confidence: 97%

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation

et al. 2017

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The selective capture of mobile radioactive nuclides, such as 137 Cs + , is crucial to the clean-up and remediation of contaminated environments. While remediation remains a challenging task, the current study considers novel organo-clay composites containing potassium copper hexacyanoferrate (KCuHCF) as a viable option for large-scale clean-up. A threestep synthesis has been demonstrated whereby pristine montmorillonite clay was readily modified to incorporate KCuHCF nanoparticles for enhanced and selective Cs + removal from aqueous environments. Alkyldiamine (DT) was used as an organic modifier to intercalate the clay and provided chelating sites to anchor copper onto the clay matrix, from which KCuHCF nanoparticles were subsequently grown in-situ via the coordination of hexacyanoferrate precursors with the immobilized copper ions. The organo-clay-HCF composite particles exhibited a superior Cs + adsorption capacity (qm = 206 mg/g), twice that of the pristine clay. The enhanced performance also extended to high Cs + selectivity in seawater, with the organo-clay-HCF composites demonstrating Cs + selectivity values in excess of 10 5 mL/g, two orders of magnitude greater than the pristine clay. Organo modification of the clay particles reduced the particle wettability, thus facilitating the separation of Cs-loaded composite particles from aqueous environments by collector-less flotation. Batch flotation experiments showed recovery efficiencies of the Cs-loaded composite particles of up to 90%, which was in great contrast to the low recovery of less than 15% for the Cs-loaded pristine montmorillonite. The current study provides a new concept for the treatment of contaminated aqueous environments.

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Section: I) Organic Modification Of the Clay Particles With The Catiomentioning

confidence: 97%

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation

et al. 2017

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“…The SEM image of NiNPs@rGO-bPEI aerogel (bPEI/ GO = 4) shows a plastic-like form (Fig. 4e, f) [59][60][61]. The TEM images of NiNPs@rGO-bPEI aerogel indicates the successful dispersion of Ni nanoparticles with the size of 18-20 nm on the surface of the rGO-based aerogel (Fig.…”

Section: Resultsmentioning

confidence: 90%

One Pot Synthesis of Nickel Nanoparticles Stabilized on rGO/Polyethyleneimine Aerogel for the Catalytic Hydrogen Generation

2015

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In this study, one pot synthesis of nickel nanoparticles immobilized on reduced graphene oxidebranched polyethyleneimine (NiNPs@rGO-bPEI) aerogel is reported. To produce graphene-based supramolecular hydrogel, bPEI with a high density of amine groups was used as a cross-linking agent. The simultaneous co-reduction of GO and nickel ions was carried out using sodium borohydride (NaBH 4 ). The catalytic activity of the NiNPs@rGO-bPEI aerogel was investigated for hydrogen generation from the hydrolysis of NaBH 4 at room temperature. The effect of various amounts of bPEI as the linking agent on the structure of the aerogel product was investigated. Moreover, the influence of various amounts of nickel loading on the catalytic activity of NiNPs@rGO-bPEI was also studied. The ease of synthesis (only at one step), low cost, being environmentally benign, existence of nitrogen and nickel to have interaction with molecular hydrogen, and also the large surface area are the key features of the synthesized catalyst that makes it suitable for industrial applications.

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“…Alternatively, CPs, such as poly(3,4‐ethylenedioxythiophene) (PEDOT) and polyaniline (PANI), have been widely studied in developing flexible or wearable electronics due to their tunable optical, electronic, and chemical properties. [10,13a,15] In particular, PANI demonstrates several advantages such as facile synthesis, environmental stability, unique acid/base doping/dedoping, and oxidation/reduction property, and therefore has been proven as a promising candidate in sensing applications . However, most of the gas sensors are based on solid powders materials and the reported PANI films still have drawbacks such as unsatisfactory gas sensing performance, limited optical transmittance, and high electrical sheet resistance.…”

Section: Transparent Gas Sensorsmentioning

confidence: 99%

Flexible Transparent Electronic Gas Sensors

Wang

Guo

Wan

et al. 2016

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Flexible and transparent electronic gas sensors capable of real-time, sensitive, and selective analysis at room-temperature, have gained immense popularity in recent years for their potential to be integrated into various smart wearable electronics and display devices. Here, recent advances in flexible transparent sensors constructed from semiconducting oxides, carbon materials, conducting polymers, and their nanocomposites are presented. The sensing material selection, sensor device construction, and sensing mechanism of flexible transparent sensors are discussed in detail. The critical challenges and future development associated with flexible and transparent electronic gas sensors are presented. Smart wearable gas sensors are believed to have great potential in environmental monitoring and noninvasive health monitoring based on disease biomarkers in exhaled gas.

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A Cu–m-phenylenediamine complex induced route to fabricate poly(m-phenylenediamine)/reduced graphene oxide hydrogel and its adsorption application

Cited by 81 publications

References 63 publications

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation

One Pot Synthesis of Nickel Nanoparticles Stabilized on rGO/Polyethyleneimine Aerogel for the Catalytic Hydrogen Generation

Flexible Transparent Electronic Gas Sensors

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A Cu–m-phenylenediamine complex induced route to fabricate poly(m-phenylenediamine)/reduced graphene oxide hydrogel and its adsorption application

Cited by 81 publications

References 63 publications

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs+ adsorption capacity and selective recovery by flotation

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs+ adsorption capacity and selective recovery by flotation

One Pot Synthesis of Nickel Nanoparticles Stabilized on rGO/Polyethyleneimine Aerogel for the Catalytic Hydrogen Generation

Flexible Transparent Electronic Gas Sensors

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Product

Resources

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Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation

Organically modified clay with potassium copper hexacyanoferrate for enhanced Cs⁺ adsorption capacity and selective recovery by flotation