Reduced graphene oxide: a metal-free catalyst for aerobic oxidative desulfurization

Gu, Qingqing; Wen, Guangwu; Ding, Yuxiao; Wu, Kuang‐Hsu; Chen, Cheng-Meng

doi:10.1039/c6gc02894b

Cited by 144 publications

(96 citation statements)

References 42 publications

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“…Carbon nanotubes with high graphitization degree demonstrated high catalytic activity in the oxidation of dibenzothiophene owing to their high electronic conduction [38], which provided electron transfer in the redox reaction. On the other hand, in [39] it was supposed that carbonyl groups and surface defects play an important role in the ODS process. In [38], structural, textural and surface properties of carbon nanotubes, for example, the Taunit CNTs, were shown to be essential for ODS.…”

Section: Introductionmentioning

confidence: 99%

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Ismagilov

Yashnik

Shikina

et al. 2019

Eurasian Chem. Tech. J.

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The role of acid treatment of Taunit carbon nanotubes in the formation of oxygen-containing functional groups on its surface as well as morphological and textural properties was studied. Acid treatment was carried out in an HNO3 solution or its mixture with H2SO4 under mild conditions (85 °C/1 h) with subsequent washing with distilled water or without washing. Properties of the initial and oxidized samples were investigated using elemental carbon, hydrogen, nitrogen, oxygen (CHNO) analysis, BET (Brunauer-Emmett-Teller) determination of surface area, X-ray diffraction, Raman and Fourier Transform Infrared Spectroscopy (FTIR) spectroscopy, and hydrogen temperature-programmed reduction. Treatment with HNO3 and HNO3/H2SO4 mixture was shown to be efficient for the formation of various oxygen-containing groups on the Taunit surface; therewith, the water washing step also contributed to functionalization of the surface. Depending on the oxidant, acid treatment increased graphite and oxygen content in the samples by a factor of 3‒4.5. Treatment with HNO3 without water washing exerted a weak effect on the graphite structure ordering, the concentration of aliphatic groups was high as compared to other oxidation conditions. Treatment of Taunit with the HNO3/H2SO4 mixture, on the contrary, increased the number of defects in graphite layers and decreased the concentration of aliphatic structures.

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Section: Introductionmentioning

confidence: 99%

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Ismagilov

Yashnik

Shikina

et al. 2019

Eurasian Chem. Tech. J.

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“…Reduced graphene oxide (rGO) has recently been reported as an efficient aerobic oxidative catalystf or the ODS reaction under mild conditions. [12] The catalytic system is highlighted by superior catalytic performance, high stability,a nd broad applicability for ar ange of aromatic sulfur-containing substrates. The catalytic performance can be improved by simple gas-phase oxidation treatment of the catalyst by oxygen.…”

Section: Oxidative Desulfurization Of Fuelsmentioning

confidence: 99%

“…140 -0.51 [20] 7CNTs140 -5.90 [13] 8rGO-425 140 -7.19 [12] 9Fe 2 O 3 RT sunlight 1.77 [21] 10 GO 25 UV 38.52 [14] [a] Reactionr ates are normalized by the catalystw eight.…”

Section: Selectivecatalytic Oxidation Of H 2 Smentioning

confidence: 99%

Nanocarbons for Catalytic Desulfurization

Lin

Heumann

2017

Chemistry An Asian Journal

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Nanocarbon catalysts are green and sustainable alternatives to metal-based catalysts for numerous catalytic transformations. The application of nanocarbons for environmental catalysis is an emerging research discipline and has undergone rapid development in recent years. In this focus review, we provide a critical analysis of state-of-the-art nanocarbon catalysts for three different catalytic desulfurization processes. In particular, we focus on the advantages and limitations as well as the reaction mechanisms of the nanocarbon catalysts at the molecular level.

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“…Besides, the two‐dimensional metal‐free materials have aroused intense interest because of the advantages of abundant reserves and cost‐efficiency . More recently, it has been found that two‐dimensional metal‐free materials for ODS have potential applications …”

Section: Introductionmentioning

confidence: 99%

Boron and Nitride Dual vacancies on Metal‐Free Oxygen Doping Boron Nitride as Initiating Sites for Deep Aerobic Oxidative Desulfurization

Dai

Wei

et al. 2020

ChemCatChem

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Boron nitride (BN) is a two‐dimensional ceramic material that has been widely applied in various catalysis reactions. However, endowing the BN material with adequate reactive centers remains to be a considerable challenge. Herein, we propose a tunable boron and nitride dual vacancies strategy to generate highly active oxygen‐doping BN (BNO) material via heat treatment in vacuum. Experimental results indicate that the vacuum treatment fabricates boron and nitride dual vacancies on the BNO. The as‐prepared vacuum treated BNO (V‐BNO) was applied as the initiator to accelerate the aerobic oxidative desulfurization (ODS) of fuel. The boosted aerobic ODS system achieves 100 % sulfur removal in 6 h, and it can be recycled 6 times without any significant performance loss. Meanwhile, the density functional theory (DFT) reveals the reaction pathway on the V‐BNO, ensuring the contribution of boron and nitride dual vacancies to the initiation of the reaction. This work highlights the vital role of dual vacancies as initiating sites for the enhanced aerobic ODS.

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Reduced graphene oxide: a metal-free catalyst for aerobic oxidative desulfurization

Abstract: Nanocarbons have been extensively used as metal-free alternatives to metal catalysts in many oxidative processes owing to their functional groups or defects, which have the activation ability toward oxygen molecules.

Cited by 144 publications

References 42 publications

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Effect of Acid Treatment on the Functionalization of Surface, Structural and Textural Properties of Carbon Nanotubes Taunit

Nanocarbons for Catalytic Desulfurization

Boron and Nitride Dual vacancies on Metal‐Free Oxygen Doping Boron Nitride as Initiating Sites for Deep Aerobic Oxidative Desulfurization

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