Nitrogen and sulfur co-doped graphene nanoribbons: A novel metal-free catalyst for high performance electrochemical detection of 2, 4, 6-trinitrotoluene (TNT)

Zhang, Ruizhong; Zhang, Chunmei; Zheng, Fuqin; Li, Xiaokun; Sun, Chia‐Liang; Chen, Wei

doi:10.1016/j.carbon.2017.10.042

Cited by 82 publications

(37 citation statements)

References 59 publications

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“…In the high-resolution S2p analysis of SA-GO ( Fig. 2), two peaks centered at 161.9 eV and 164.1 eV should be assigned to S2p 3/2 and S2p 1/2 , respectively, which are the peaks resulted from the S2p spin-orbit doublet of the -C-S-Cbond [11,13]. The S2p 3/2 and S2p 1/2 bonding configurations can be attributed to the formation of C=S and C-S bonds in the structure of the SA-GO [16].…”

Section: Resultsmentioning

confidence: 99%

“…This paper focuses to prepare the sulfur-doped graphene oxide to act as an efficient low-sulfur content anti-wear additive for harsh operation conditions at high temperature. Based on the preparation researches of sulfur-doped graphene, the unique nanomaterials could be obtained by the reactions of thiourea [11], NaHSO 3 [12], K 2 S 2 O 8 [13], phenyl disulfide [14,15], sulfur [16], Na 2 S [17], CS 2 [18], P 4 S 10 [19], H 2 S [20], SO 2 [21], CS 2 [21], benzyl disulfide [22], and graphene oxide under the hydrothermal or other simple conditions. After the sulfur doping process, sulfur-doped graphene oxide could significantly improve the anti-wear properties of the based oil.…”

Section: Introductionmentioning

confidence: 99%

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Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant Additive

Xiao

Sun

et al. 2020

Nanoscale Res Lett

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Sulfur-doped graphene oxide (SA-GO) prepared by sulfuration and alkylation of graphene oxide is applied as an efficient green anti-wear additive for harsh operation conditions of engines. X-ray photoelectron spectroscopy analysis reveals the sulfur content of octadecylamine-modified SA-GO (sulfuration follows alkylation) is increased by 79 times compared with the reverse process that alkylation follows sulfuration, suggesting the preparation route is a key factor of the sulfuration process. The higher sulfur content and -C-S-Csulfur bonding constitution result better lubrication effect, while the investigation of chain length of alkylation modification and concentration of the alkylated sulfur-doped graphene oxide indicates the octylamine-modified SA-GO shows smaller diameter of wear scar within the concentration range between 1 × 10 −4 and 2.5 × 10 −4 wt%. The decrement percent of wear scar diameter is 43.2% in 928 lubrication oil and 17.2% in PAO4 oil while the SA-GO modified by octylamine is applied with the concentrations 2.5 × 10 −4 wt% in PAO4 and 1 × 10 −4 wt% in 928 oil, respectively. The sulfur content in oil samples is only 0.006~0.001 wt%, which is much lower than the sulfur content standard recommended by ILSAC that is 0.5 wt%. The research work indicates the SA-GO additive is more feasible for the pollution treatment which focuses the substantial reduction of sulfur content in lubrication oil on the premise of improving lubrication capability.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant Additive

Xiao

Sun

et al. 2020

Nanoscale Res Lett

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“…[33]. Guo et al [47] and Chen et al [48] used differential pulse voltammetry to obtain -NO2 reduction and obtained a good dose-dependent response for the electrochemical detection of nitroaromatics. These results support our experimental results obtained for the reduction of nitroaromatics.…”

Section: Square Wave Voltammetry (Sqwv) Comparison and Calibrationmentioning

confidence: 99%

“…The transducing effects of [EMIM][BF4] led us to build the calibrated dose response by varying the concentration from 1 ppm to 1000 ppm for both The peaks −0.81 V and −0.94 V correspond to reduction of -NO 2 to corresponding -NHOH [33]. Guo et al [47] and Chen et al [48] used differential pulse voltammetry to obtain -NO 2 reduction and obtained a good dose-dependent response for the electrochemical detection of nitroaromatics. These results support our experimental results obtained for the reduction of nitroaromatics.…”

Section: Square Wave Voltammetry (Sqwv) Comparison and Calibrationmentioning

confidence: 99%

Characterization of Room-Temperature Ionic Liquids to Study the Electrochemical Activity of Nitro Compounds

Banga

Paul

Muthukumar

et al. 2020

Sensors

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Over the past few years, room-temperature ionic liquid (RTIL) has evolved as an important solvent-cum-electrolyte because of its high thermal stability and excellent electrochemical activity. Due to these unique properties, RTILs have been used as a solvent/electrolyte/mediator in many applications. There are many RTILs, which possess good conductivity as well as an optimal electrochemical window, thus enabling their application as a transducer for electrochemical sensors. Nitroaromatics are a class of organic compounds with significant industrial applications; however, due to their excess use, detection is a major concern. The electrochemical performance of a glassy carbon electrode modified with three different RTILs, [EMIM][BF4], [BMIM][BF4] and [EMIM][TF2N], has been evaluated for the sensing of two different nitroaromatic analytes: 2,6-dinitrotoluene (2,6 DNT) and ethylnitrobenzene (ENB). Three RTILs have been chosen such that they have either a common anion or cation amongst them. The sensory response has been measured using square wave voltammetry (SQWV). We found the transducing ability of [EMIM][BF4] to be superior compared to the other two RTILs. A low limit of detection (LOD) of 1 ppm has been achieved with a 95% confidence interval for both the analytes. The efficacy of varying the cationic and anionic species of RTIL to obtain a perfect combination has been thoroughly investigated in this work, which shows a novel selection process of RTILs for specific applications. Moreover, the results obtained from testing with a glassy carbon electrode (GCE) have been replicated using a miniaturized sensor platform that can be deployed easily for on-site sensing applications.

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“…doping into the graphene architectures could be profit to modify their chemical reactivity and electronic structures which are particularly expected to restrain the sizes of Pd NPs as well as strengthen the interaction between Pd and graphene sheets . The lone pair electrons in N and S dopants led to the generation of negative charge on the graphene surface that not only provide more anchoring sites for high dispersion of Pd NPs, but also modulate the electronic property of graphene, hence increasing the activity and stability of Pd NPs on the support during the coupling reaction …”

Section: Introductionmentioning

confidence: 99%

Pd embedded N, S co‐doped graphene wrapped core‐shell magnetic nanospheres: Engineered stable nanocatalyst for Suzuki couplings

Rohani

Ziarani

Badiei

2019

Applied Organom Chemis

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Designed nitrogen and sulfur co‐doped graphene wrapped magnetic core‐shell supported Pd nanoparticles were synthesized through the following steps. Firstly, Fe3O4 was prepared, coated with silica and then functionalized with amine groups to create a positive charge on the structure for enhancing the interaction of the Fe3O4@SiO2 with graphene oxide. Secondary, the pre‐catalyst wrapped with graphene to enhance adsorption of aromatic substrates through π–π stacking. Thirdly, graphene was doped with nitrogen and sulfur to increase the grafting of Pd in hybrid. Finally, Pd NPs were attached on the surface of pre‐engineered structure to produce Fe3O4@SiO2@N,S‐wG@Pd which exhibited high performance in Suzuki reactions. This superior activity can be indexed to the incorporation of N and S atoms into graphene led to high anchoring and well‐dispersion of Pd NPs on the nanocomposite surface offering large amounts of active centers, that strongly increased the interaction between Pd and substrates to decreases Pd leaching.

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Nitrogen and sulfur co-doped graphene nanoribbons: A novel metal-free catalyst for high performance electrochemical detection of 2, 4, 6-trinitrotoluene (TNT)

Cited by 82 publications

References 59 publications

Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant Additive

Sulfur-Doped Alkylated Graphene Oxide as High-Performance Lubricant Additive

Characterization of Room-Temperature Ionic Liquids to Study the Electrochemical Activity of Nitro Compounds

Pd embedded N, S co‐doped graphene wrapped core‐shell magnetic nanospheres: Engineered stable nanocatalyst for Suzuki couplings

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