Reduction of nitrophenols to aminophenols under concerted catalysis by Au/g-C3N4 contact system

Fu, Yongsheng; Huang, Ting; Jia, Baoping; Zhu, Junwu; Wang, Xin

doi:10.1016/j.apcatb.2016.09.051

Cited by 259 publications

(88 citation statements)

References 51 publications

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“…The microstructure of the samples is studied by powder X‐ray diffraction (XRD) and Fourier‐transform infrared (FT‐IR) spectra. As shown in Figure a, to the CNNT 650 , there are only two XRD diffraction peaks located at 12.8° and 27.8°, corresponding to (100) and (002) planes of g ‐C 3 N 4 , respectively . To the Au NR 769 /CNNT 650 , the two characteristic peaks of CNNT 650 still exist without obvious peak shift, in addition, there are other five distinct diffraction peaks at 38.2°, 44.5°, 64.7°, 77.7°, and 81.8°, corresponding to the bulk Au (JCPDS # 04‐0784).…”

Section: Resultsmentioning

confidence: 99%

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation

Zhang

Ding

Lou

et al. 2018

Adv Funct Materials

136

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Au nanorods (NRs) decorated carbon nitride nanotubes (Au NRs/CNNTs) photocatalysts have been designed and prepared by impregnation-annealing approach. Localized surface plasmon resonance (LSPR) peaks of Au NRs can be adjusted by changing the aspect ratios, and the light absorption range of Au NRs/CNNTs is extended to longer wavelength even near-infrared light. Optimal composition of Pt@Au NR 769 /CNNT 650 has been achieved by adjusting the LSPR peaks of Au NRs and further depositing Pt nanoparticles (NPs), and the photocatalytic H 2 evolution rate is 207.0 µmol h −1 (20 mg catalyst). Preliminary LSPR enhancement photocatalytic mechanism is suggested. On one hand, LSPR of Au NRs is beneficial for visible-light utilization. On the other hand, Pt NPs and Au NRs have a synergetic enhancement effect on photocatalytic H 2 evolution of CNNTs, in which the local electromagnetic field can improve the photogenerated carrier separation and direct electron transfer increases the hot electron concentration while Au NRs as the electron channel can well restrain charge recombination, finally Pt as co-catalyst can boost H + reduction rate. This work provides a new way to develop efficient photocatalysts for splitting water, which can simultaneously extend light absorption range and facilitate carrier generation, transportation and reduce carrier recombination.

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Section: Resultsmentioning

confidence: 99%

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation

Zhang

Ding

Lou

et al. 2018

Adv Funct Materials

136

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“…Nitrophenols are regarded as one kind of persistent organic pollutants frequently identified in various industrial discharges released from plasticizers, dyes pesticides and pharmaceutical industries . However, its reduzate anilines are industrially used as various intermediates for pharmaceuticals, polymers, herbicides, photographic developers, corrosion inhibitors, anticorrosion‐lubricant, hair‐dyeing agent and other fine chemicals .…”

Section: Introductionmentioning

confidence: 99%

Synergy Derived from Bimetal Co−Cu in Phosphate to Enables Ultrafast Catalytic Hydrogenated Activity in Nitrophenol Reduction

Wang

Gao

et al. 2020

ChemistrySelect

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Herein, we report Co−Cu bimetal integrated phosphate catalyst, unexpectedly enables ultrafast catalytic reduction of 4‐nitrophenol within 40 s by right of the synergy of bimetals. Impressively, the reaction induction period observed might indicate the deoxygenation of metal oxide units in phosphate, however, which was eliminated using bimetal (Co−Cu) phosphate at 30 °C and 40 °C. The calculated reaction rate constant is 4.78 min−1 at 30 °C, which exhibits a very high superiority compared to other reported cobalt‐based catalysts. This study offers the possibility for the ultrafast catalytic reduction and elimination of toxic nitrophenol using efficient‐cost transition metal catalysts.

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“…Consequently, g‐CN presents excellent photocatalytic performance for photo‐reduction reactions, such as hydrogen evolution from water splitting and reduction of CO 2 to solar fuels . However, it is noteworthy that the photocatalytic activity of g‐CN for reduction of PNP to PAP is extremely low ,. Moreover, in comparison to the numerous investigation interests on other photocatalytic reactions by g‐CN or g‐CN based composites, fewer studies have been reported on photo‐reduction of PNP.…”

Section: Introductionmentioning

confidence: 99%

“…Moreover, in comparison to the numerous investigation interests on other photocatalytic reactions by g‐CN or g‐CN based composites, fewer studies have been reported on photo‐reduction of PNP. And, in most cases g‐CN was only used as photo‐reduction medium or supporter to prepare or load noble metal catalysts …”

Section: Introductionmentioning

confidence: 99%

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

et al. 2018

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Photocatalytic reduction of p‐nitrophenol to p‐aminophenol is important because of the high toxicity of p‐nitrophenol and the wide application of p‐aminophenol. Graphitic carbon nitride (g‐CN) is an excellent photocatalyst for various photo‐reduction reactions, but inefficient for photo‐reduction of p‐nitrophenol due to the electrostatic exclusion. In this work, we control the morphology and surface property of g‐CN and achieve significantly enhanced activity. The obtained protonated g‐CN nanosheet (pg‐CNNS) material has positively charged surface that can adsorb p‐nitrophenolate anions, therefore facilitating the transfer of photo‐generated electrons from catalyst to p‐nitrophenol. Its reaction rate is 1626 times higher than that of the pristine g‐CN. Besides the surface charge, the morphology of photocatalyst also has important effect on activity, which is demonstrated by the relatively low activity of protonated g‐CN in comparison to pg‐CNNS. The pg‐CNNS photocatalyst has an excellent stability and superior catalytic universality for photo‐reduction of various nitroaromatic compounds. This work does not only expand the application of a well‐known material, but also highlights the importance of understanding photocatalytic mechanism for designing photocatalyst.

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Reduction of nitrophenols to aminophenols under concerted catalysis by Au/g-C3N4 contact system

Cited by 259 publications

References 51 publications

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation

Synergy Derived from Bimetal Co−Cu in Phosphate to Enables Ultrafast Catalytic Hydrogenated Activity in Nitrophenol Reduction

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

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Reduction of nitrophenols to aminophenols under concerted catalysis by Au/g-C3N4 contact system

Cited by 259 publications

References 51 publications

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C3N4 Nanotubes under Visible‐Light Irradiation

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C3N4 Nanotubes under Visible‐Light Irradiation

Synergy Derived from Bimetal Co−Cu in Phosphate to Enables Ultrafast Catalytic Hydrogenated Activity in Nitrophenol Reduction

Highly Efficient Photo‐Reduction of p‐Nitrophenol by Protonated Graphitic Carbon Nitride Nanosheets

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Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation

Localized Surface Plasmon Resonance Enhanced Photocatalytic Hydrogen Evolution via Pt@Au NRs/C₃N₄ Nanotubes under Visible‐Light Irradiation