Graphene vanadic acid (GVA) as a novel heterogeneous catalyst for highly selective benzene hydroxylation under mild conditions

Ghiaci, Mehran; Farahmand, Shohreh; Masoomi, Kianoosh; Safaiee, Maliheh; Razavizadeh, Jalal. S.

doi:10.1016/j.apt.2021.01.007

Cited by 3 publications

(1 citation statement)

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“…Firstly, GO was synthesized by the modified hummer method 38 . 100 mg of GO was added to 50 mL DI water and ultrasonicated for 1 h to obtain a uniform suspension (180 kW).…”

Section: Methodsmentioning

confidence: 99%

Facile synthesis of NiTe2-Co2Te2@rGO nanocomposite for high-performance hybrid supercapacitor

Farshadnia

Ensafi

Mousaabadi

et al. 2023

Sci Rep

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The design of bimetallic tellurides that exhibit excellent electrochemical properties remains a huge challenge for high-performance supercapacitors. In the present study, tellurium is consolidated on CoNi2@rGO for the first time, to synthesize NiTe2-Co2Te2@rGO nanocomposite by using a facile hydrothermal method. As-prepared NiTe2-Co2Te2@rGO nanocomposite was characterized by EDS, TEM, FESEM, Raman, BET, XRD, and XPS techniques to prove the structural transformation. Upon the electrochemical characterization, NiTe2-Co2Te2@rGO has notably presented numerous active sites and enhanced contact sites with the electrolyte solution during the faradic reaction. The as-prepared nanocomposite reveals a specific capacity of 223.6 mAh g−1 in 1.0 M KOH at 1.0 A g-1. Besides, it could retain 89.3% stability after 3000 consecutive galvanostatic charge–discharge cycles at 1.0 A g−1 current density. The hybrid supercapacitor, fabricated by activated carbon as an anode site, and NiTe2-Co2Te2@rGO as a cathode site, presents a potential window of 1.60 V with an energy density of 51 Wh kg−1 and a power density of 800 W kg−1; this electrode is capable of lighting up two red LED lamps and a yellow LED lamp for 20 min, which is connected in parallel. The present work opens new avenues to design and fabrication of nanocomposite electrode materials in the field of supercapacitors.

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“…Firstly, GO was synthesized by the modified hummer method 38 . 100 mg of GO was added to 50 mL DI water and ultrasonicated for 1 h to obtain a uniform suspension (180 kW).…”

Section: Methodsmentioning

confidence: 99%