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Nitrobenzene

About: Nitrobenzene is a research topic. Over the lifetime, 5285 publications have been published within this topic receiving 83368 citations. The topic is also known as: essence of mirbane & nitrobenzol.


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Journal ArticleDOI
Han Yan1, Hu Wu1, Kun Li1, Yawen Wang1, Xue Tao1, Hu Yang1, Aimin Li1, Rongshi Cheng1 
TL;DR: Aniline exhibits the highest contribution coefficients in both hydrophobic and hydrophilic zones of GO among the three measured AOCs due to its good water solubility and facile formation of hydrogen bonds.
Abstract: In this work, graphene oxide (GO) has been employed as an efficient adsorbent for the removal of three aromatic organic compounds (AOCs), namely, aniline, nitrobenzene, and chlorobenzene, from water under various initial AOC concentrations and pH levels. Based on the characteristics of surface structures of GO, a simple semiquantitative model has been provided to describe the intrinsic adsorption behavior of GO to AOCs. Accordingly, the adsorption mechanism has been discussed in detail at molecular levels. The contribution coefficients derived from the proposed model indicate that the most preferential interactions between GO and AOCs are hydrophobic interactions (π–π stacking and hydrophobic effect) that occur on graphitic zones of GO (unoxidized region). In the oxidized region, there also exist the hydrophobic interactions on sp2 clusters, although they may be hindered by surrounding sp3 zones which are the most unfavorable and are only accessible to AOCs through hydrogen bonding or electrostatic effect...

121 citations

Journal ArticleDOI
TL;DR: The results showed that, the aniline degradation followed pseudo first-order reaction model and increased with increasing temperature or persulfate concentration, and the degradation mechanism of anilines was also tentatively proposed.
Abstract: Oxidation of aniline by persulfate in aqueous solutions was investigated and the reaction kinetic rates under different temperature, persulfate concentration and pH conditions were examined in batch experiments. The results showed that, the aniline degradation followed pseudo first-order reaction model. Aniline degradation rate increased with increasing temperature or persulfate concentration. In the pH range of 3 to 11, a low aniline degradation rate was obtained at strong acid system (pH 3), while a high degradation rate was achieved at strong alkalinity (pH 11). Maximum aniline degradation occurred at pH 7 when the solution was in a weak level of acid and alkalinity (pH 5, 7 and 9). Produced intermediates during the oxidation process were identified using liquid chromatography-mass spectrometry technology. And nitrobenzene, 4-4′-diaminodiphenyl and 1-hydroxy-1,2-diphenylhydrazine have been identified as the major intermediates of aniline oxidation by persulfate and the degradation mechanism of aniline was also tentatively proposed.

119 citations

Journal ArticleDOI
TL;DR: It is proposed that aromatic nitro and amine compounds undergo photochemical reductive and oxidative coupling, respectively, to specifically produce azobenzene derivatives which exhibit characteristic Raman signals related to the azo group.
Abstract: We propose that aromatic nitro and amine compounds undergo photochemical reductive and oxidative coupling, respectively, to specifically produce azobenzene derivatives which exhibit characteristic Raman signals related to the azo group. A photoinduced charge transfer model is presented to explain the transformations observed in para-substituted ArNO2 and ArNH2 on nanostructured silver due to the surface plasmon resonance effect. Theoretical calculations show that the initial reaction takes place through excitation of an electron from the filled level of silver to the lowest unoccupied molecular orbital (LUMO) of an adsorbed ArNO2 molecule, and from the highest occupied molecular orbital (HOMO) of an adsorbed ArNH2 molecule to the unoccupied level of silver, during irradiation with visible light. The para-substituted ArNO2−˙ and ArNH2+˙ surface species react further to produce the azobenzene derivatives. Our results may provide a new strategy for the syntheses of aromatic azo dyes from aromatic nitro and amine compounds based on the use of nanostructured silver as a catalyst.

119 citations

Journal ArticleDOI
TL;DR: It can be concluded that the hybrid reactor system can withstand shock load up to two times of usual nitrobenzene concentration and the optimum substrate:co-substrate ratio was found to be 1:33.

117 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
2023171
2022342
2021123
2020129
2019123
2018146