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  1. Article ; Online: Current research progress of physical and biological methods for disposing waste plastics

    Liu, Yanbing / Shi, Jinwen / Jin, Hui / Guo, Liejin

    Journal of Cleaner Production. 2023 July, v. 408 p.137199-

    2023  

    Abstract: Overuse of plastic products has caused serious hazards to ecological environment, and effective technologies were needed urgently to overcome the drawbacks of existing methods. Mechanisms and representative studies of physical and biological methods to ... ...

    Abstract Overuse of plastic products has caused serious hazards to ecological environment, and effective technologies were needed urgently to overcome the drawbacks of existing methods. Mechanisms and representative studies of physical and biological methods to dispose plastics were summarized in this review, and the advantages and disadvantages of both methods were pointed out. Physical treatment of plastics involved the extrusion or deformation of plastics, which were subsequently used in virgin plastics, construction, concrete and some composites. This disposal method was simple and non-polluting, but has limited fields of application. Biodegradation of plastics could be achieved by microorganisms (fungi, bacteria and algae) in the ecosystem, undergoing colonization, biodeterioration, biofragmentation, assimilation and mineralization, eventually converting plastics into CO₂ and H₂O. Conditions for biodegrading plastics were mild and products were non-polluting, but the process was very slow. From the results, single method for treating plastics has certain limitations, and combining different methods has become hot topic of study. Such as the combination of physical and chemical methods could improve the miscibility of polymers or modify plastics to produce copolymers. Plastics could be pretreated by heat or ultrasound to reduce the hydrophobicity and activation energy of the reaction. Moreover, combining biodegradation and photodegradation of plastics was also an effective way to improve the degradation efficiency of plastics.
    Keywords activation energy ; biodegradation ; carbon dioxide ; composite polymers ; concrete ; deformation ; ecosystems ; extrusion ; heat ; hydrophobicity ; mineralization ; photolysis ; ultrasonics ; Plastic ; Waste disposing ; Physical method ; Biological method
    Language English
    Dates of publication 2023-07
    Publishing place Elsevier Ltd
    Document type Article ; Online
    ISSN 0959-6526
    DOI 10.1016/j.jclepro.2023.137199
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  2. Article ; Online: Flower-like MoS

    He, Kai / Guo, Liejin

    RSC advances

    2021  Volume 11, Issue 37, Page(s) 23064–23072

    Abstract: An irregular CdS pyramid/flower-like ... ...

    Abstract An irregular CdS pyramid/flower-like MoS
    Language English
    Publishing date 2021-06-30
    Publishing country England
    Document type Journal Article
    ISSN 2046-2069
    ISSN (online) 2046-2069
    DOI 10.1039/d1ra03834f
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  3. Article: Flower-like MoS₂ microspheres compounded with irregular CdS pyramid heterojunctions: highly efficient and stable photocatalysts for hydrogen production from water

    He, Kai / Guo, Liejin

    RSC advances. 2021 June 30, v. 11, no. 37

    2021  

    Abstract: An irregular CdS pyramid/flower-like MoS₂ microsphere composite photocatalyst was successfully synthesized using a simple one-step hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, ... ...

    Abstract An irregular CdS pyramid/flower-like MoS₂ microsphere composite photocatalyst was successfully synthesized using a simple one-step hydrothermal method. The as-prepared samples were characterized by X-ray diffraction, X-ray photoelectron spectroscopy, scanning electron microscopy, ultraviolet visible absorption spectroscopy, fluorescence spectroscopy and photoelectrochemical tests. The composite photocatalysts showed superior photocatalytic activities for hydrogen evolution from water under visible light irradiation (λ ≥ 420 nm) with an extremely high apparent quantum yield (AQY = 64.8%) at 420 nm. To our knowledge, this value is the highest reported efficiency value for CdS/MoS₂ photocatalysts. Further detailed characterization revealed that the special structure for some CdS pyramid structures dispersed in the MoS₂ microsphere structures and surrounded by MoS₂ nanosheets led to the photogenerated electrons migrating from the conduction band of different faces of the CdS pyramid to the conduction band of different MoS₂ nanosheets while photogenerated holes remained in the CdS pyramid structures, which greatly promoted the separation of photogenerated electrons and holes, improving the photoactivity of the CdS/MoS₂ catalyst. The catalyst also exhibited perfect stability, and the photoactivity displayed no significant degradation during continuous hydrogen production over nearly 70 h.
    Keywords X-ray diffraction ; X-ray photoelectron spectroscopy ; fluorescence emission spectroscopy ; hot water treatment ; hydrogen production ; irradiation ; light ; microparticles ; nanosheets ; photocatalysis ; photocatalysts ; ultraviolet-visible spectroscopy
    Language English
    Dates of publication 2021-0630
    Size p. 23064-23072.
    Publishing place The Royal Society of Chemistry
    Document type Article
    ISSN 2046-2069
    DOI 10.1039/d1ra03834f
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  4. Article ; Online: Mechanistic insights and catalytic enhancement of phenolic wastewater supercritical water gasification: A combined experiment and density functional theory study.

    Qi, Xingang / Zhang, Jiawei / Li, Xujun / Cui, Jinhua / Chen, Yunan / Jin, Hui / Guo, Liejin

    Journal of environmental management

    2024  Volume 358, Page(s) 120836

    Abstract: Supercritical water gasification technology provides a favorable technology to achieve pollution elimination and resource utilization of phenolic wastewater. In this study, the reaction mechanism of phenolic wastewater supercritical water gasification ... ...

    Abstract Supercritical water gasification technology provides a favorable technology to achieve pollution elimination and resource utilization of phenolic wastewater. In this study, the reaction mechanism of phenolic wastewater supercritical water gasification was investigated using a combination of experimental and computational methods. Five reaction channels were identified to elucidate the underlying pathway of phenol decomposition. Importantly, the rate-determining step was found to be the dearomatization reaction. By integrating computational and experimental analyses, it was found that phenol decomposition via the path with the lowest energy barrier generates cyclopentadiene, featuring a dearomatization barrier of 70.97 kcal/mol. Additionally, supercritical water plays a catalytic role in the dearomatization process by facilitating proton transfer. Based on the obtained reaction pathway, alkali salts (Na
    MeSH term(s) Wastewater/chemistry ; Catalysis ; Phenols/chemistry ; Waste Disposal, Fluid/methods ; Water Pollutants, Chemical/chemistry ; Water/chemistry
    Chemical Substances Wastewater ; Phenols ; Water Pollutants, Chemical ; Water (059QF0KO0R)
    Language English
    Publishing date 2024-04-09
    Publishing country England
    Document type Journal Article
    ZDB-ID 184882-3
    ISSN 1095-8630 ; 0301-4797
    ISSN (online) 1095-8630
    ISSN 0301-4797
    DOI 10.1016/j.jenvman.2024.120836
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    In stock of ZB MED Bonn / Germany

    Z 7556: Show issues

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  5. Article ; Online: Copper Vacancy and LSPR-Activated MXene Synergistically Enabling Selective Photoreduction CO

    Liao, Chen / Zhou, Hongwei / Zhang, Shunxin / Wang, Feng / Liu, Ya / Guo, Liejin

    ChemSusChem

    2024  , Page(s) e202301927

    Abstract: Photocatalytic ... ...

    Abstract Photocatalytic CO
    Language English
    Publishing date 2024-02-09
    Publishing country Germany
    Document type Journal Article
    ISSN 1864-564X
    ISSN (online) 1864-564X
    DOI 10.1002/cssc.202301927
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  6. Article ; Online: Sulfur migration mechanism of pig manure in supercritical water: A combined experimental and DFT study.

    Zhang, Shuyuan / Du, Mingming / Ge, Hui / Rong, Siqi / Chen, Yunan / Guo, Liejin

    Journal of hazardous materials

    2024  Volume 471, Page(s) 134376

    Abstract: Pig manure (PM) is a high concentration organic waste rich in sulfur, and its biofuel contains various sulfur-containing pollutants, which reduces the safety of the products. Supercritical water (SCW) can dissolve most organic matter, which is a ... ...

    Abstract Pig manure (PM) is a high concentration organic waste rich in sulfur, and its biofuel contains various sulfur-containing pollutants, which reduces the safety of the products. Supercritical water (SCW) can dissolve most organic matter, which is a technology worthy of further study. In order to reduce sulfur pollution in the process of PM resource utilization and better control the conversion path of sulfur, it is necessary to explore the migration mechanism of sulfur in the whole PM-SCW gasification process. The experimental results indicated that H
    Language English
    Publishing date 2024-04-20
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 1491302-1
    ISSN 1873-3336 ; 0304-3894
    ISSN (online) 1873-3336
    ISSN 0304-3894
    DOI 10.1016/j.jhazmat.2024.134376
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  7. Article ; Online: Light energy utilization and microbial catalysis for enhanced biohydrogen: Ternary coupling system of triethanolamine-mediated Fe@C-Rhodobacter sphaeroides.

    Jiang, Qiushi / Li, Yanjing / Wang, Minmin / Cao, Wen / Yang, Xueying / Zhang, Sihu / Guo, Liejin

    Bioresource technology

    2024  Volume 401, Page(s) 130733

    Abstract: This study investigated the mediating effect of Triethanolamine on Fe@C-Rhodobacter sphaeroides hybrid photosynthetic system to achieve efficient biohydrogen production. The biocompatible Fe@C generates excited electrons upon exposure to light, releasing ...

    Abstract This study investigated the mediating effect of Triethanolamine on Fe@C-Rhodobacter sphaeroides hybrid photosynthetic system to achieve efficient biohydrogen production. The biocompatible Fe@C generates excited electrons upon exposure to light, releasing ferrum for nitrogenase synthesis, and regulating the pH of the fermentation environment. Triethanolamine was introduced to optimize the electron transfer chain, thereby improving system stability, prolonging electron lifespan, and facilitating ferrum corrosion. This, in turn, stimulated the lactic acid synthetic metabolic pathway of Rhodobacter sphaeroides, resulting in increased reducing power in the biohybrid system. The ternary coupling system was analyzed through the regulation of concentration, initial pH, and light intensity. The system achieved the highest total H
    MeSH term(s) Rhodobacter sphaeroides/metabolism ; Hydrogen/metabolism ; Light ; Ethanolamines/metabolism ; Ethanolamines/chemistry ; Iron/chemistry ; Catalysis ; Hydrogen-Ion Concentration ; Carbon ; Fermentation ; Photosynthesis
    Chemical Substances Hydrogen (7YNJ3PO35Z) ; triethanolamine (9O3K93S3TK) ; Ethanolamines ; Iron (E1UOL152H7) ; Carbon (7440-44-0)
    Language English
    Publishing date 2024-04-24
    Publishing country England
    Document type Journal Article ; Research Support, Non-U.S. Gov't
    ZDB-ID 1065195-0
    ISSN 1873-2976 ; 0960-8524
    ISSN (online) 1873-2976
    ISSN 0960-8524
    DOI 10.1016/j.biortech.2024.130733
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    In stock of ZB MED Bonn / Germany

    Z 3258: Show issues

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  8. Article ; Online: RuSe

    Li, Lubing / Qu, Jingkuo / Zhang, Lei / Wei, Liting / Su, Jinzhan / Guo, Liejin

    ACS applied materials & interfaces

    2024  Volume 16, Issue 19, Page(s) 24660–24670

    Abstract: The development of affordable, highly active, and stable trifunctional electrocatalysts is imperative for sustainable energy applications such as overall water splitting and rechargeable Zn-air battery. Herein, we report a composite electrocatalyst with ... ...

    Abstract The development of affordable, highly active, and stable trifunctional electrocatalysts is imperative for sustainable energy applications such as overall water splitting and rechargeable Zn-air battery. Herein, we report a composite electrocatalyst with RuSe
    Language English
    Publishing date 2024-05-06
    Publishing country United States
    Document type Journal Article
    ISSN 1944-8252
    ISSN (online) 1944-8252
    DOI 10.1021/acsami.4c02766
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  9. Article ; Online: Unraveling the Selectivity and Synergistic Mechanism of Cu-Based Alloys for CO

    Jiao, Zihao / Song, Mengmeng / Jing, Wenhao / Liu, Ya / Guo, Liejin

    The journal of physical chemistry letters

    2023  Volume 14, Issue 26, Page(s) 6009–6017

    Abstract: Understanding the synergistic effect of Cu-based alloys on the adsorption behavior and selectivity of the ... ...

    Abstract Understanding the synergistic effect of Cu-based alloys on the adsorption behavior and selectivity of the CO
    Language English
    Publishing date 2023-06-23
    Publishing country United States
    Document type Journal Article
    ISSN 1948-7185
    ISSN (online) 1948-7185
    DOI 10.1021/acs.jpclett.3c01358
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  10. Article ; Online: An Experimental Investigation of the Effect of Platinum on the Corrosion of Cathode Carbon Support in a PEMFC.

    Liu, Fengfeng / Gao, Ziliang / Su, Jinzhan / Guo, Liejin

    ChemSusChem

    2022  Volume 15, Issue 10, Page(s) e202102726

    Abstract: The possible role of platinum in the carbon corrosion at cell voltage higher than 1.0 V is controversial yet. To gain more insights into this issue, a square-wave potential cycles between 1.0 to 1.5 V was applied to fuel cells comprising cathodes with ... ...

    Abstract The possible role of platinum in the carbon corrosion at cell voltage higher than 1.0 V is controversial yet. To gain more insights into this issue, a square-wave potential cycles between 1.0 to 1.5 V was applied to fuel cells comprising cathodes with and without Pt. Using online non-dispersive infrared spectroscopy, we showed that Pt catalyzed the gasification of carbon in the early stage, while upon prolonged exposure to potential cycling (≥3 h), platinum started to hinder the CO
    Language English
    Publishing date 2022-04-12
    Publishing country Germany
    Document type Journal Article
    ISSN 1864-564X
    ISSN (online) 1864-564X
    DOI 10.1002/cssc.202102726
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