Environmental separation and enrichment of gold and palladium ions by amino-modified three-dimensional graphene

Li, Jing; Wang, Shaoxia; Feng, Wang; Wu, Xuezhong; Zhuang, Xuming

doi:10.1039/c8ra10506e

Cited by 14 publications

(4 citation statements)

References 53 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…Figure 1d shows the presence of the nitrogen element in three different forms. Fitted peaks of N1s located at 397.5, 398.2, and 399.1 eV correspond to Pyridinic N, Pyrrolic N, and Graphitic N, respectively 23 . As shown in Figure 1e, fitted peaks at 102.4, 102.9, and 103.4 eV for Si2p correspond to SiOC, SiOSi, SiOH, respectively 24 …”

Section: Resultsmentioning

confidence: 93%

See 1 more Smart Citation

The effect of silicon dioxide nanoparticle‐covered graphene oxide on mechanical properties, thermal stability and rheological performance of thermoplastic polyurethanes

Ding

Tai

Chen

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

A two‐step grafting procedure has been used to graft tetraethylenepentamine (TEPA) and nano silicon dioxide (SiO2), onto graphene oxide (GO) surface. The resulting modified GO, that was TGOS, which was used as a reinforcement in thermoplastic polyurethanes (TPUs). Mechanical properties, thermal stability and rheological properties of composites were investigated. Results showed that the addition of TGOS significantly improved the mechanical properties of TPU compared with the pure TPU sample. Tensile strength and elongation at break of TPU were increased by 50.8 and 18.6%, respectively, when the addition amount was only 0.5 wt%. TG results showed that the addition of TGOS improved the heat resistance of TPU. Complex viscosity, storage modulus (G') and loss modulus (G") of TPU composites with different additions were analyzed by rheological tests, the results showed that the addition of TGOS improved the deformation resistance of TPU. Meanwhile, TPU composites present high G', G", and complex viscosity with the increase of TGOS filling amount in the low frequency region.

show abstract

Section: Resultsmentioning

confidence: 93%

“…Fitted peaks of N1s located at 397.5, 398.2, and 399.1 eV correspond to Pyridinic N, Pyrrolic N, and Graphitic N, respectively. 23 As shown in Figure 1e, fitted peaks at 102.4, 102.9, and 103.4 eV for Si2p correspond to Si O C, Si O Si, Si OH, respectively. 24 XRD spectra of GO, SiO 2 , TGO and TGOS were illustrated in Figure 2a.…”

Section: Characterizationmentioning

confidence: 90%

The effect of silicon dioxide nanoparticle‐covered graphene oxide on mechanical properties, thermal stability and rheological performance of thermoplastic polyurethanes

Ding

Tai

Chen

et al. 2021

J of Applied Polymer Sci

View full text Add to dashboard Cite

show abstract

“…Figure 2 b shows the presence of N element in three forms. Fitted peaks of N1s at 398.6, 399.2, and 399.8 eV correspond to Pyridinic N, Pyrrolic N, and Graphitic N [ 30 ]. As shown in Figure 2 c, fitted peaks at 104.2, 104.5, and 105.3 eV for Si2p correspond to Si–O–C, Si–O–Si, and Si–OH, respectively [ 31 ].…”

Section: Resultsmentioning

confidence: 99%

Two Birds with One Stone: Preparation of 4, 4-Diaminodiphenylmethane Functionalized GO@SiO2 with Mechanical Reinforcement and UV Shielding Properties and Its Application in Thermoplastic Polyurethane

et al. 2021

View full text Add to dashboard Cite

This study prepared 4,4-diaminodiphenylmethane (DDM)-functionalized graphene oxide (GO)@silica dioxide (SiO2) nano-composites through amidation reaction and low-temperature precipitation. The resulting modified GO, that was DDM−GO@SiO2. The study found that DDM−GO@SiO2 showed good dispersion and compatibility with thermoplastic polyurethane (TPU) substrates. Compared with pure TPU, the tensile strength of the TPU composites increased by 41% to 94.6 MPa at only 0.5 wt% DDM−GO@SiO2. In addition, even when a small amount of DDM−GO@SiO2 was added, the UV absorption of TPU composites increased significantly, TPU composites can achieve a UV shielding efficiency of 95.21% in the UV-A region. These results show that this type of material holds great promise for the preparation of functional coatings and film materials with high strength and weather resistance.

show abstract

“…In addition, as confirmed for some sorbents with porous network structure, e.g. 3D graphene with adsorption efficiency 20-86 times greater than its mass [44], the benefits associated with application of the tested fly bioash at lower rates (< 1% w/v) are realistic and would likely induce modest pH/salinity changes; however, specifically designed experiments with a wider range of ash rates are needed to elucidate these potential benefits.…”

Section: Fly Ash Strongly Impacts Ph and Ec Performances Of The Watercoursementioning

confidence: 96%

Hardwood fly ash as a low-C waste has strong potential to become a value-added sorbent for removal of the herbicide terbuthylazine from the aquatic matrix

Ondrašek

Kranjčec

Maltašić

et al. 2021

Biomass Conv. Bioref.

View full text Add to dashboard Cite

Due to intensive activities in agriculture, forestry and transport sectors, certain active components of pesticides that are prone to leaching become emergent chemicals in aquatic systems. Terbuthylazine (TBA), as one of widely used broad-spectrum herbicides, has been recognized as relatively (e.g. vs atrazine) more hydrophobic and resistant to biodegradation, dissipates much more slowly in aquatic ecosystems and often exceeds the EU limit for drinking water (0.1 μg/L). The in-depth characterisation of fly ash (FA, from a cogeneration plant facility fuelled by deciduous hardwood chips) using advanced in situ approaches (scanning electron microscopy, X-ray diffraction) raised the hypotheses that developed nano-to-micro-structure and alkaline Ca/Mg/Si-enriched mineralogy of FA could be effectively exploited for removal of TBA from watercourses. Thus, the aim of study was to investigate dissipation dynamic and adsorption mechanism of TBA in aquatic media amended with FA. The results show that 48 h after addition of FA (1% w/v) to watercourse, TBA was completely removed from its initial level (250-fold higher than the EU limit for drinking water), while in the Control (without FA) treatment, TBA remained nearly 80% of its initial amount. The X-ray photoelectron spectral footprint of FA after 48-h exposure to TBA revealed a shift in peak position and intensity among O, Ca, K, Mg and Si, suggesting that their active sites likely participated in adsorption of TBA and its removal from the watercourse. Adsorption kinetics were clearly described by the pseudo-second order model (R 2 = 0.9997), assuming single-layer chemisorption as a rate-controlling mechanism, but multilayer physisorption and intra-pore diffusion could also be present. The equilibrium adsorption data fitted the best to the Langmuir isotherm model, confirming the spontaneous monolayer TBA-FA interaction with a mean maximum adsorption capacity of 84 mg/g FA (1% w/v) after 24-h contact time at 25 °C and pH 12. These results will contribute to formulation and development of novel FA-based polymers, targeted for purification of aquatic ecosystems loaded with TBA and similar compounds that represent threat to environmental and human health.

show abstract

Environmental separation and enrichment of gold and palladium ions by amino-modified three-dimensional graphene

Abstract: The excellent adsorption properties of three-dimensional graphene (3DG) can be further enhanced by triethylenetetramine modification to increase its adsorption capacity for precious metal ions.

Cited by 14 publications

References 53 publications

The effect of silicon dioxide nanoparticle‐covered graphene oxide on mechanical properties, thermal stability and rheological performance of thermoplastic polyurethanes

The effect of silicon dioxide nanoparticle‐covered graphene oxide on mechanical properties, thermal stability and rheological performance of thermoplastic polyurethanes

Two Birds with One Stone: Preparation of 4, 4-Diaminodiphenylmethane Functionalized GO@SiO2 with Mechanical Reinforcement and UV Shielding Properties and Its Application in Thermoplastic Polyurethane

Hardwood fly ash as a low-C waste has strong potential to become a value-added sorbent for removal of the herbicide terbuthylazine from the aquatic matrix

Contact Info

Product

Resources

About