Removal of ethylbenzene from air by graphene quantum dots and multi wall carbon nanotubes in present of UV radiation

Luminescent graphene quantum dots (GQDs) and multi wall carbon nanotubes (MWCNTs) as photocatalytic sorbent based on was used for removal of toxic ethylbenzene from air in present of UV-radiation. A novel method based on solid gas removal (SGR) based on GQDs and MWCNTs as an efficient adsorbent was used for ethylbenzene removal from air in Robson quartz tubes (RGT). After synthesized and purified of GQDs and MWCNTs, a system was designed for generation of ethylbenzene in air with difference concentrations, and then the mixture was moved to quartz tubes with UV radiation in optimized conditions. The ethylbenzene in air was absorbed on the 25 mg of GQDs or MWCNTs, desorbed from sorbent at 146oC and determined by GC-FID.

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Interfacial enhancement effect of graphene quantum dots on PEDOT:PSS/single-walled carbon nanotubes thermoelectric materials

Synthetic Metals ◽

10.1016/j.synthmet.2021.116861 ◽

2021 ◽

Vol 280 ◽

pp. 116861

Author(s):

Ping Fu ◽

Jin-Kun Xiao ◽

Jia-Zhi Gong ◽

Ying Zhu ◽

Jun-An Yao ◽

...

Keyword(s):

Carbon Nanotubes ◽

Quantum Dots ◽

Thermoelectric Materials ◽

Graphene Quantum Dots ◽

Single Walled Carbon Nanotubes ◽

Enhancement Effect ◽

Single Walled Carbon ◽

Walled Carbon Nanotubes

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Removal of Cr(VI) by magnetic Fe/C crosslinked nanoparticle for water purification: rapid contaminant removal property and mechanism of action

Water Science & Technology ◽

10.2166/wst.2018.497 ◽

2018 ◽

Vol 78 (10) ◽

pp. 2171-2182 ◽

Cited By ~ 5

Author(s):

Runhua Chen ◽

Ping Wang ◽

Meng Li ◽

Fei Tian ◽

Jiangjun Xiao ◽

...

Keyword(s):

Carbon Nanotubes ◽

Covalent Bond ◽

Contaminant Removal ◽

X Ray Diffraction ◽

Working Mechanism ◽

Efficient Treatment ◽

Effective Removal ◽

Bond Property ◽

Novel Method ◽

Optimized Conditions

Abstract In this study, a novel method based on the magnetic Fe/C crosslinked nanoparticles (MNZVI/CNTs-OH) is reported for the effective removal of Cr(VI) in aqueous solutions. Parameters that influence the effectiveness of the nanoparticles, such as pH, temperature, reaction time, and particle dosage, was analyzed. It was found that MNZVI/CNTs-OH particles exhibit significantly higher activity toward Cr(VI) removal than bare NZVI, carbon nanotubes (CNTs), and other synthetic nanomaterials. Under optimized conditions, the removal efficiency of Cr(VI) by MNZVI/CNTs-OH is up to 98% with an initial contaminant concentration of 50 mg/L, and chromium content in the residue up to 48 mg/g. Physical characterizations, including Fourier transform infrared (FTIR), X-ray diffraction (XRD), scanning electron microscopy (SEM), and TG-TD measurements, provide insights into the working mechanism of Cr(VI) purification. Our findings suggest that immobilization of MNZVI onto carbon nanotubes increase the covalent bond property, while crosslinked nanoparticles (NPs) provide the electron transfer passage from the NZVI surface and improves the dispersity of the MNZVI, thus enhancing the performance. These results demonstrate the potential of the MNZVI/CNTs-OH nanoparticles for the rapid and efficient treatment of Cr(VI)-containing wastewater.

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