PEC reduction of NB to AN was demonstrated in an aqueous solution. We use cookies to help provide and enhance our service and tailor content and ads. We found that NB reduction reaction was strongly dependent on the electrode potential; large cathodic polarization is kinetically favorable for hydrogen evolution over a CZTS electrode, which leads to hindrance of the PEC NB reduction reaction, resulting in a decrease in the yield of AN (<20%). When the initialreac… By using the CZTS electrode, a six-electron reduction reaction of NB to aniline (AN) proceeded in an aqueous solution under visible light irradiation. Benzene is nitrated by replacing one of the hydrogen atoms on the benzene ring by a nitro group, NO 2. By continuing you agree to the use of cookies. Moreover, we found that the proton concentration in an aqueous electrolyte had a significant effect on the PEC NB reduction reaction. The other existing production pathway for aniline is based on phenol as the starting raw material. Download : Download high-res image (100KB)Download : Download full-size image. ScienceDirect ® is a registered trademark of Elsevier B.V. ScienceDirect ® is a registered trademark of Elsevier B.V. Photoelectrochemical synthesis of aniline from nitrobenzene in a neutral aqueous solution by using a. Measure out 100 mL of concentratedhydrochloric acid. Figure 2 illustrates such aniline production pathways. The working cell and counter cell were separated by Nafion membrane. The mixture becomeswarm and before long the reaction should be quite vigorous; if itboils very vigorously, moderate the reduction somewhat bytemporarily immersing the flask in cold water. PEC reduction of nitrobenzene to aniline was performed in a gastight three-electrode configuration cell with a double compartment in which a CZTS electrode, Pt coil and Ag/AgCl electrode were used as a working electrode, counter electrode and reference electrode, respectively. This page looks in outline at the preparation of phenylamine (also known as aniline or aminobenzene) starting from benzene. In this study, we investigated the PEC NB reduction reaction over a CZTS electrode in conjunction with the structural and optical properties. At small cathodic polarization, conversion of NB reached to>99% and the yield of AN was calculated to be >50%. Into a 500-mL round bottomed flask equipped with a refluxcondenser place 25 g (21 mL, 0.25 mol) of nitrobenzene and 45 g(0.38 mol) of granulated tin. Benzene to nitrobenzene. We fabricated a CZTS electrode by the sol-gel and spin-coating method on an Mo/glass substrate and performed photoelectrochemical (PEC) reduction of nitrobenzene (NB) in an aqueous environment under visible light irradiation (420 < λ < 800 nm). Aniline was first commercially produced using nitrobenzene as starting material in 1930s. NB reduction reaction was dependent on the electrode potential. This pathway remains the most common for aniline production today. Pour about 15 mL of this acid down the condenserand shake the contents of the flask steadily. AN production was dependent on pH of the aqueous electrolyte. The benzene is first converted to nitrobenzene which is in turn reduced to phenylamine. Currently, almost all existing plants producing aniline from nitrobenzene are integrated with facilities to produce nitrobenzene from benzene. Copyright © 2020 Elsevier B.V. or its licensors or contributors. © 2017 Elsevier B.V. All rights reserved.