Carbazole-involved conjugated microporous polymer hollow spheres for selective photocatalytic oxidation of benzyl alcohol under visible-light irradiation

Wei, Guanbao; Wang, Lühua; Ding, Zhengxin; Yuan, Rusheng; Long, Jinlin; Xu, Chao

doi:10.1016/j.jcis.2023.03.196

Cited by 10 publications

(1 citation statement)

References 72 publications

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“…The above photocatalytic degradation experiment results may be due to the fact that, on the one hand, the photocatalytic material has a unique conjugated structure, excited electrons can quickly migrate on the surface of the photocatalytic material, and the unique hollow structure can improve the light absorption rate. 42,43 On the other hand, through hydrophilic modification, the photocatalytic material after hydrophilic modification can be fully in contact with organic pollutants in water, thus greatly utilizing the active site on the photocatalytic material, thereby improving its degradation ability. 44 However, the degradation of norfloxacin by these two catalyst materials was not satisfactory.…”

Section: Catalytic Activity and Stabilitymentioning

confidence: 99%

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

Yu,

Hasi,

Guo

et al. 2024

ACS Appl. Nano Mater.

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Morphology control and hydrophilic modification are important strategies to improve the photocatalytic activity of polymers. In the present work, novel conjugated microporous polymers with hollow spherical structures (CMPs-HSs) are prepared using 1,3,5-triacetylene benzene and 2,8-dibromodibenzothiophene as monomers through Sonogashira−Hagihara crosscoupling reaction and hard template method. In order to improve the dispersibility of the as-prepared CMPs-HSs in water, the hydrophilic modification of the CMPs-HSs is performed based on the thiol-alkynes click reaction, and the corresponding hydrophilic modified polymer is denoted as CMPs-HSs-S. The band gaps of CMPs-HSs and CMPs-HSs-S are 2.15 and 1.96 eV, respectively. The photocatalytic degradation rate of CMPs-HSs-S to Rhodamine B (RhB 20 mg L −1 ) is 90% within 80 min, while the CMPs-HSs is only 59%. Under the same experimental conditions, the degradation rate of CMPs-HSs-S to methylene blue (MB 20 mg L −1 ) is 85% within 120 min, and the degradation rate of CMPs-HSs to methylene blue is only 41%. The results of photocatalytic experiments show that the photocatalytic performance of CMPs-HSs-S is significantly better than that of CMPs-HS, suggesting that hydrophilic modification is more conducive to the contact of CMPs-HSs-S with pollutants and the occurrence of a photodegradation reaction. In addition, the corresponding composite membrane materials (abbreviated as CCMPs-MHSs and CCMPs-MHSs-S) of the CMPs-HS and CMPs-HS-S were prepared by the method of carbonized treatment, and their solar-driven interfacial evaporation (SDIE) performance was also studied. Under 1 kW m −2 simulated sunlight irradiation, the solar evaporation rates of CCMPs-MHSs and CCMPs-MHSs-S are 1.38 and 1.41 kg m −2 h −1 and the photothermal conversion efficiencies are 81.5 and 84.6%, respectively. Therefore, considering the designable flexibility of CMPs, the CMPs-based novel materials have great application potential in the study of photodegradation of organic dyes, solar-driven interfacial evaporation, etc.

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Section: Catalytic Activity and Stabilitymentioning

confidence: 99%

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

Yu,

Hasi,

Guo

et al. 2024

ACS Appl. Nano Mater.

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High‐Efficiency Photocatalytic Oxidation of Benzyl Alcohol by NH₂‐UiO‐66‐(Indole‐2,3‐Dione)‐Fe

Li,

Zhao,

Yang

et al. 2024

Chemistry An Asian Journal

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The photocatalytic oxidation of biomass‐derived benzyl alcohol provides a promising way for the synthesis of benzoic acid, which is an important intermediate with wide applications. To improve the efficiency of photocatalytic benzyl alcohol oxidation to benzoic acid is of great interest. In this work, we propose the utilization of NH2‐UiO‐66‐ID‐Fe catalyst for photocatalytic oxidation of benzyl alcohol to benzoic acid, where NH2‐UiO‐66 is a typically used metal‐organic framework, ID is indole‐2,3‐dione (ID) that has biocompatibility, light absorption property and can be covalently combined with amino‐functionalized substances. The NH2‐UiO‐66‐ID‐Fe catalyst exhibits improved light absorption and photo‐generated electron‐hole separation ability compared with NH2‐UiO‐66. The photocatalytic performance of NH2‐UiO‐66‐ID‐Fe was examined for the oxidation of bio‐based benzyl alcohol under mild conditions of air atmosphere, room temperature and no additive or additional oxidant involved. The results show that the conversion of benzyl alcohol and the selectivity to benzoic acid could both reach over 99% in 6 h, and the generation rate of benzoic acid per gram of catalyst is 3.36 mmol g‐1 h‐1. The reaction mechanism was detected by radical trapping method and in situ electron paramagnetic resonance. This study presents an efficient and environmentally benign avenue for the synthesis of carboxylic acid compounds.

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TiO2–Cu7S4 modified with a carbazole-based conjugated porous polymer for adsorption and photocatalytic degradation of bisphenol A

Xu,

Li,

Chen

et al. 2024

Green Energy & Environment

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Carbazole-involved conjugated microporous polymer hollow spheres for selective photocatalytic oxidation of benzyl alcohol under visible-light irradiation

Cited by 10 publications

References 72 publications

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

High‐Efficiency Photocatalytic Oxidation of Benzyl Alcohol by NH₂‐UiO‐66‐(Indole‐2,3‐Dione)‐Fe

TiO2–Cu7S4 modified with a carbazole-based conjugated porous polymer for adsorption and photocatalytic degradation of bisphenol A

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Carbazole-involved conjugated microporous polymer hollow spheres for selective photocatalytic oxidation of benzyl alcohol under visible-light irradiation

Cited by 10 publications

References 72 publications

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

Hollow Nanospheres of Conjugated Microporous Polymers for the Degradation of Organic Pollutants in Water

High‐Efficiency Photocatalytic Oxidation of Benzyl Alcohol by NH2‐UiO‐66‐(Indole‐2,3‐Dione)‐Fe

TiO2–Cu7S4 modified with a carbazole-based conjugated porous polymer for adsorption and photocatalytic degradation of bisphenol A

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Product

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High‐Efficiency Photocatalytic Oxidation of Benzyl Alcohol by NH₂‐UiO‐66‐(Indole‐2,3‐Dione)‐Fe