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4 Nitroaniline

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Rusheng Yuan – One of the best experts on this subject based on the ideXlab platform.

  • Mechanistic insight into the photocatalytic hydrogenation of 4Nitroaniline over band-gap-tunable CdS photocatalysts
    Physical chemistry chemical physics : PCCP, 2013
    Co-Authors: Rui Lin, Lijuan Shen, Ruowen Liang, Rusheng Yuan
    Abstract:

    CdS photocatalysts with tunable band gaps (2.17–2.32 eV) were successfully prepared by a solvothermal method. Photocatalytic hydrogenation of 4Nitroaniline over the obtained samples was evaluated in the presence of HCO2NH4 as a hole scavenger upon purging with N2 under visible light irradiation (λ ≥ 420 nm). The CdS sample prepared by CdCl2 and sulfur powder in ethylenediamine showed excellent catalytic activity, giving 100% of 4Nitroaniline conversion and 95% of p-phenylenediamine selectivity after 35 min of visible light irradiation. The results of electron spin resonance revealed that its photoexcited holes could efficiently react with HCO2− ions within HCO2NH4 molecules to produce ˙CO2− radicals with strong reductive abilities. Furthermore, photoexcited electrons of the obtained sample exhibited relatively strong reductive abilities as compared to other CdS samples. Therefore, this sample showed the highest catalytic activity among the CdS samples for the photocatalytic hydrogenation of 4Nitroaniline.

  • Visible-light-induced photocatalytic hydrogenation of 4Nitroaniline over In2S3 photocatalyst in water
    Catalysis Communications, 2013
    Co-Authors: Rui Lin, Lijuan Shen, Ruowen Liang, Rusheng Yuan
    Abstract:

    Abstract Photocatalytic hydrogenation of 4Nitroaniline over the In2S3 photocatalyst was investigated in water under visible light irradiation (λ ≥ 420 nm). After 90 min of visible light irradiation, 100% of 4Nitroaniline could be reduced to p-phenylenediamine over the In2S3 photocatalyst in the presence of triethanolamine as a hole scavenger. Moreover, the photoreduction activity of the In2S3 photocatalyst could keep at ~ 100% in the 5th cycle of testing. On the basic of the results of electron spin resonance, photoinduced electrons of the In2S3 photocatalyst were identified as the active species for the photocatalytic hydrogenation of 4Nitroaniline.

  • A new insight into the photocatalytic reduction of 4Nitroaniline to p-phenylenediamine in the presence of alcohols
    Applied Catalysis B-environmental, 2012
    Co-Authors: Linrui Wen, Lijuan Shen, Ruowen Liang, Rusheng Yuan
    Abstract:

    Abstract Photoreduction of 4Nitroaniline to p-phenylenediamine over TiO2, ZnO, PbBi2Nb2O9 and CdS photocatalysts in the presence of CH3OH was investigated under light irradiation (hv ≥ band gap) upon purging with N2. Compared with PbBi2Nb2O9 and CdS, TiO2 and ZnO showed photocatalytic activities for the photoreduction of 4Nitroaniline. Electron spin resonance analysis results revealed that a methanol radical could be detected in the present of TiO2 and ZnO. Its formation was attributed to the reaction between the hydroxyl radical and CH3OH molecule. The species had strong reductive ability, and therefore could reduce 4Nitroaniline to p-phenylenediamine. Other alcohols (C2H5OH and i-C3H7OH) were also found to be efficient additives for the photoreduction of 4Nitroaniline. The results of the 2H-labeled experiments indicated that the p-phenylenediamine formation was formed by the hydrogen transfer reaction between the 4Nitroaniline and H2O molecules. A mechanism was proposed to explain the photoreduction of 4Nitroaniline to p-phenylenediamine in the present alcohols.

Lijuan Shen – One of the best experts on this subject based on the ideXlab platform.

  • an architecture of cds h2ti5o11 ultrathin nanobelt for photocatalytic hydrogenation of 4 Nitroaniline with highly efficient performance
    Journal of Materials Chemistry, 2015
    Co-Authors: Jinhua Xiong, Shijing Liang, Lijuan Shen, Yuhao Liu, Changsheng Cao, Ruowen Liang
    Abstract:

    A CdS/H2Ti5O11 ultrathin nanobelt nanocomposite (CdTi) was fabricated successfully by a two-step process. It was confirmed by SEM and TEM/HRTEM that the highly dispersed CdS about 15 nm in size was firmly anchored on the ultrathin nanobelt. The as-prepared CdTi-5 with an optimal loading of 81.3% CdS converted 4Nitroaniline to p-phenylenediamine, giving almost 100% yield with a selectivity of about 98% in 3 min under visible light irradiation. Its photocatalytic activity was much higher than that of the bare CdS and P25/CdS composition. The highly efficient performance was attributed to the synergetic effects of the formed heterojunction between titanate, nanobelt and CdS as well as the unique features of the titanate nanobelt, which makes the photo-generated electron to transfer smoothly and promotes the separation of photo-induced carriers. Finally, based on the experimental results of Mott–Schottky, UV-vis DRS and EPR, a possible reaction mechanism for the hydrogenation of 4Nitroaniline over the CdTi was proposed.

  • An architecture of CdS/H2Ti5O11 ultrathin nanobelt for photocatalytic hydrogenation of 4Nitroaniline with highly efficient performance
    Journal of Materials Chemistry A, 2015
    Co-Authors: Jinhua Xiong, Shijing Liang, Lijuan Shen, Yuhao Liu, Changsheng Cao, Ruowen Liang
    Abstract:

    A CdS/H2Ti5O11 ultrathin nanobelt nanocomposite (CdTi) was fabricated successfully by a two-step process. It was confirmed by SEM and TEM/HRTEM that the highly dispersed CdS about 15 nm in size was firmly anchored on the ultrathin nanobelt. The as-prepared CdTi-5 with an optimal loading of 81.3% CdS converted 4Nitroaniline to p-phenylenediamine, giving almost 100% yield with a selectivity of about 98% in 3 min under visible light irradiation. Its photocatalytic activity was much higher than that of the bare CdS and P25/CdS composition. The highly efficient performance was attributed to the synergetic effects of the formed heterojunction between titanate, nanobelt and CdS as well as the unique features of the titanate nanobelt, which makes the photo-generated electron to transfer smoothly and promotes the separation of photo-induced carriers. Finally, based on the experimental results of Mott–Schottky, UV-vis DRS and EPR, a possible reaction mechanism for the hydrogenation of 4Nitroaniline over the CdTi was proposed.

  • Mechanistic insight into the photocatalytic hydrogenation of 4Nitroaniline over band-gap-tunable CdS photocatalysts
    Physical chemistry chemical physics : PCCP, 2013
    Co-Authors: Rui Lin, Lijuan Shen, Ruowen Liang, Rusheng Yuan
    Abstract:

    CdS photocatalysts with tunable band gaps (2.17–2.32 eV) were successfully prepared by a solvothermal method. Photocatalytic hydrogenation of 4Nitroaniline over the obtained samples was evaluated in the presence of HCO2NH4 as a hole scavenger upon purging with N2 under visible light irradiation (λ ≥ 420 nm). The CdS sample prepared by CdCl2 and sulfur powder in ethylenediamine showed excellent catalytic activity, giving 100% of 4Nitroaniline conversion and 95% of p-phenylenediamine selectivity after 35 min of visible light irradiation. The results of electron spin resonance revealed that its photoexcited holes could efficiently react with HCO2− ions within HCO2NH4 molecules to produce ˙CO2− radicals with strong reductive abilities. Furthermore, photoexcited electrons of the obtained sample exhibited relatively strong reductive abilities as compared to other CdS samples. Therefore, this sample showed the highest catalytic activity among the CdS samples for the photocatalytic hydrogenation of 4Nitroaniline.

Ruowen Liang – One of the best experts on this subject based on the ideXlab platform.

  • an architecture of cds h2ti5o11 ultrathin nanobelt for photocatalytic hydrogenation of 4 Nitroaniline with highly efficient performance
    Journal of Materials Chemistry, 2015
    Co-Authors: Jinhua Xiong, Shijing Liang, Lijuan Shen, Yuhao Liu, Changsheng Cao, Ruowen Liang
    Abstract:

    A CdS/H2Ti5O11 ultrathin nanobelt nanocomposite (CdTi) was fabricated successfully by a two-step process. It was confirmed by SEM and TEM/HRTEM that the highly dispersed CdS about 15 nm in size was firmly anchored on the ultrathin nanobelt. The as-prepared CdTi-5 with an optimal loading of 81.3% CdS converted 4Nitroaniline to p-phenylenediamine, giving almost 100% yield with a selectivity of about 98% in 3 min under visible light irradiation. Its photocatalytic activity was much higher than that of the bare CdS and P25/CdS composition. The highly efficient performance was attributed to the synergetic effects of the formed heterojunction between titanate, nanobelt and CdS as well as the unique features of the titanate nanobelt, which makes the photo-generated electron to transfer smoothly and promotes the separation of photo-induced carriers. Finally, based on the experimental results of Mott–Schottky, UV-vis DRS and EPR, a possible reaction mechanism for the hydrogenation of 4Nitroaniline over the CdTi was proposed.

  • An architecture of CdS/H2Ti5O11 ultrathin nanobelt for photocatalytic hydrogenation of 4Nitroaniline with highly efficient performance
    Journal of Materials Chemistry A, 2015
    Co-Authors: Jinhua Xiong, Shijing Liang, Lijuan Shen, Yuhao Liu, Changsheng Cao, Ruowen Liang
    Abstract:

    A CdS/H2Ti5O11 ultrathin nanobelt nanocomposite (CdTi) was fabricated successfully by a two-step process. It was confirmed by SEM and TEM/HRTEM that the highly dispersed CdS about 15 nm in size was firmly anchored on the ultrathin nanobelt. The as-prepared CdTi-5 with an optimal loading of 81.3% CdS converted 4Nitroaniline to p-phenylenediamine, giving almost 100% yield with a selectivity of about 98% in 3 min under visible light irradiation. Its photocatalytic activity was much higher than that of the bare CdS and P25/CdS composition. The highly efficient performance was attributed to the synergetic effects of the formed heterojunction between titanate, nanobelt and CdS as well as the unique features of the titanate nanobelt, which makes the photo-generated electron to transfer smoothly and promotes the separation of photo-induced carriers. Finally, based on the experimental results of Mott–Schottky, UV-vis DRS and EPR, a possible reaction mechanism for the hydrogenation of 4Nitroaniline over the CdTi was proposed.

  • Mechanistic insight into the photocatalytic hydrogenation of 4Nitroaniline over band-gap-tunable CdS photocatalysts
    Physical chemistry chemical physics : PCCP, 2013
    Co-Authors: Rui Lin, Lijuan Shen, Ruowen Liang, Rusheng Yuan
    Abstract:

    CdS photocatalysts with tunable band gaps (2.17–2.32 eV) were successfully prepared by a solvothermal method. Photocatalytic hydrogenation of 4Nitroaniline over the obtained samples was evaluated in the presence of HCO2NH4 as a hole scavenger upon purging with N2 under visible light irradiation (λ ≥ 420 nm). The CdS sample prepared by CdCl2 and sulfur powder in ethylenediamine showed excellent catalytic activity, giving 100% of 4Nitroaniline conversion and 95% of p-phenylenediamine selectivity after 35 min of visible light irradiation. The results of electron spin resonance revealed that its photoexcited holes could efficiently react with HCO2− ions within HCO2NH4 molecules to produce ˙CO2− radicals with strong reductive abilities. Furthermore, photoexcited electrons of the obtained sample exhibited relatively strong reductive abilities as compared to other CdS samples. Therefore, this sample showed the highest catalytic activity among the CdS samples for the photocatalytic hydrogenation of 4Nitroaniline.