Oxygen functionalized carbon nanocomposite derived from natural illite as adsorbent for removal of cationic and anionic dyes

Wang, Gaofeng; Wang, Shan; Sun, Wen; Sun, Zhiming; Zheng, Shuilin

doi:10.1016/j.apt.2017.05.004

Cited by 18 publications

(5 citation statements)

References 51 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…This can be attributed to the fact that the surface of the ACNT/C cathode after activation became rich in oxygen-containing functional groups compared to the GR/C and MWCNT/C cathodes; thus, not only can this improve ORR in the cathode, it also increases the organic dye adsorption capacity of the ACNT/C cathode. 34…”

Section: Resultsmentioning

confidence: 99%

“…This can be attributed to the fact that the surface of the ACNT/C cathode after activation became rich in oxygencontaining functional groups compared to the GR/C and MWCNT/C cathodes; thus, not only can this improve ORR in the cathode, it also increases the organic dye adsorption capacity of the ACNT/C cathode. 34 In summary, the ACNT/C cathode after activation improved compared to that of the MWCNT/C cathode, which shows that activation facilitates the generation of more hydroxyl radicals (•OH), thus improving the efficiency of pollutant decomposition. The decolorization rate of the ACNT/C cathode are similar to the results obtained for the GR/C cathode, which demonstrates that ACNTs have the potential to replace graphene in the EF system.…”

Section: Analysis Of Degradation Efficiency In the Electrofenton Processmentioning

confidence: 93%

See 1 more Smart Citation

Enhancement of performance for graphite felt modified with carbon nanotubes activated by KOH as Cathode in electro-fenton systems

Wang

Lin

2021

Journal of Applied Biomaterials & Functional Materials

View full text Add to dashboard Cite

The electro-Fenton (EF) process is one of the advanced oxidation processes (AOPs). Graphite felt is widely used as an cathode material for the EF process, and its performance can be improved by surface modification. Active carbon nanotubes (ACNTs) have more oxygen-containing functional groups and better electrochemical properties compared to Multi-wall carbon nanotubes (MWCNTs). In this study, graphite felt was used as the substrate, and composite cathodes were prepared by surface treatment using MWCNT, graphene, and ACNTs. Rhodamine B (RhB) dye decolorization tests were then conducted to investigate the degradation performance of the EF system with different cathodes. The results showed that based on the micromorphology of ACNT, the tubular form of MWCNT was activated into a GR-like flake structure, it was also found that the strength of the oxygen-containing functional groups of ACNT improved significantly. The activated MWCNT/C cathode exhibited a 60-min decolorization rate of 77.28% compared to the unactivated MWCNT/C cathode, whereas the decolorization rate of the ACNT/C cathode increased to 85.01% after activation, which was close to that of the GR/C cathode at 88.55%. In summary, the ACNT/C cathode exhibited degradation efficiency comparable to that of the GR/C cathode.

show abstract

Section: Resultsmentioning

confidence: 99%

Section: Analysis Of Degradation Efficiency In the Electrofenton Processmentioning

confidence: 93%

Enhancement of performance for graphite felt modified with carbon nanotubes activated by KOH as Cathode in electro-fenton systems

Wang

Lin

2021

Journal of Applied Biomaterials & Functional Materials

View full text Add to dashboard Cite

show abstract

“…The BET specific surface area and Barrett–Joyner–Halenda (BJH) size distribution were obtained based on the measurement of N 2 adsorption–desorption isotherms at 77 K (ASAP 2020, Micromeritics, USA). Because of the existence of carbonaceous species derived from CTS, the samples were initially degassed under 60 °C for 12 h or overnight using a degassing system to remove the physically adsorbed water; a higher temperature will influence the chemistry of resultant samples . And the weight of the guest-free samples was recorded upon degassing.…”

Section: Methodsmentioning

confidence: 99%

“…Because of the existence of carbonaceous species derived from CTS, the samples were initially degassed under 60 °C for 12 h or overnight using a degassing system to remove the physically adsorbed water; a higher temperature will influence the chemistry of resultant samples. 42 And the weight of the guest-free samples was recorded upon degassing. Then, the sample tubes were mounted on the measurement station, the adsorptive gas was introduced slowly, and the total weight of samples plus the adsorbed gas was recorded.…”

Section: = ×mentioning

confidence: 99%

Surface Functionalization of Montmorillonite with Chitosan and the Role of Surface Properties on Its Adsorptive Performance: A Comparative Study on Mycotoxins Adsorption

Wang

Sun

et al. 2020

Langmuir

Self Cite

View full text Add to dashboard Cite

Understanding surface and interfacial information, which has a close relationship to the structures and properties of materials, helps guide the design of materials for specific applications. This study focuses on the surface functionalization of montmorillonite (Mt) with chitosan (CTS) and exploring the role of surface properties on its adsorptive performance. Two prototypical products, namely, 180-Htc@Mt and 250-Htc@Mt, were fabricated via the hydrothermal method at 180 and 250 °C, respectively. Field emission scanning electron microscopy revealed that hydrothermal carbon (Htc) derived from CTS anchored on the surface of Mt uniformly with a spherical morphology. The introduction of Htc endowed the surface of Mt with abundant hydroxy, amine, and amide groups; organic carbon; developed porosity; and hydrophobic interfacial property. Hydrothermal temperature has huge impacts on the surface system, and smaller particles (average size of 27 vs 53 nm) with deeper carbonization, higher content of carbonaceous and nitrogenous functional groups, more developed porosity (66.149 vs 39.434 m 2 /g of specific surface area, 0.115 vs 0.090 cm 3 /g of pore volume), and slightly decreased hydrophobicity can be readily achieved at a higher temperature. The incoming surface protonated amine and amide functional groups show an ion−dipolar interaction to polar aflatoxin B 1 (AFB 1 ), and the increased organic carbon content as well as interfacial hydrophobicity generate a hydrophobic interaction to weak polar zearalenone (ZER). Consequently, the surface functionalization affords Mt enhanced adsorption capacity for AFB 1 , approximately two times compared with Mt, and superior adsorption ability for ZER (10 mg/g). The present work provides sufficient evidence of "surface directs application" of Mt, which encourages researchers to focus on studies of the surface science of clay minerals.

show abstract

“…Illite, a typical clay mineral belonging to the family of 2:1 layered silicates with a crystal structure of two silicon−oxygen tetrahedrons fused to an edge-shared aluminum−oxygen octahedron, has huge reserves and low production cost [ 1 , 2 , 3 ]. Owing to its moderate cation exchange capacity and large specific surface area, it is now most widely used in the fields of adsorption of dyes, perchlorate, and antibiotics in aqueous environment [ 4 , 5 , 6 ], remediation of soil [ 7 ], or removal of hazardous radionuclides or toxic heavy metal pollutants [ 8 , 9 ]. Illite belongs to the mica group [ 10 ].…”

Section: Introductionmentioning

confidence: 99%

Effect of 3-Mercaptopropyltriethoxysilane Modified Illite on the Reinforcement of SBR

et al. 2022

View full text Add to dashboard Cite

To achieve the sustainable development of the rubber industry, the substitute of carbon black, the most widely used but non-renewable filler produced from petroleum, has been considered one of the most effective ways. The naturally occurring illite with higher aspect ratio can be easily obtained in large amounts at lower cost and with lower energy consumption. Therefore, the expansion of its application in advanced materials is of great significance. To explore their potential use as an additive for reinforcing rubber, styrene butadiene rubber (SBR) composites with illites of different size with and without 3-mercaptopropyltriethoxysilane (KH580) modification were studied. It was found that the modification of illite by KH580 increases the K-illite/SBR interaction, and thus improves the dispersion of K-illite in the SBR matrix. The better dispersion of smaller size K-illite with stronger interfacial interaction improves the mechanical properties of SBR remarkably, by an increment of about nine times the tensile strength and more than ten times the modulus. These results demonstrate, except for the evident effect of particle size, the great importance of filler–rubber interaction on the performance of SBR composites. This may be of great significance for the potential wide use of the abundant naturally occurring illite as substitute filler for the rubber industry.

show abstract

Oxygen functionalized carbon nanocomposite derived from natural illite as adsorbent for removal of cationic and anionic dyes

Cited by 18 publications

References 51 publications

Enhancement of performance for graphite felt modified with carbon nanotubes activated by KOH as Cathode in electro-fenton systems

Enhancement of performance for graphite felt modified with carbon nanotubes activated by KOH as Cathode in electro-fenton systems

Surface Functionalization of Montmorillonite with Chitosan and the Role of Surface Properties on Its Adsorptive Performance: A Comparative Study on Mycotoxins Adsorption

Effect of 3-Mercaptopropyltriethoxysilane Modified Illite on the Reinforcement of SBR

Contact Info

Product

Resources

About