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  • Wiley  (4)
  • Liu, Yang  (4)
  • Wang, Huibo  (4)
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  • Wiley  (4)
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  • 1
    In: Small, Wiley, Vol. 15, No. 48 ( 2019-11)
    Abstract: Carbon dots (CDs) have attracted increasing attention in disease therapy owing to their low toxicity and good biocompatibility. Their therapeutic effect strongly depends on the CDs structure (e.g., size or functional groups). However, the impact of CDs chirality on maltase and blood glucose level has not yet been fully emphasized and studied. Moreover, in previous reports, chiral CDs with targeted optical activity have to be synthesized from precursors of corresponding optical rotation, severely limiting chiral CDs design. Here, chiral CDs with optical rotation opposite to that of the precursor are facilely prepared through electrochemical polymerization. Interestingly, their chirality can be regulated by simply adjusting reaction time. At last, the resultant (+)‐DCDs (700 µg mL −1 ) are employed to modify maltase in an effort to regulate the hydrolytic rate of maltose, showing an excellent inhibition ratio to maltase of 54.7%, significantly higher than that of (−)‐LCDs (15.5%) in the same reaction conditions. The superior performance may be attributed to the preferable combination of DCDs with maltase. This study provides an electrochemical method to facilely regulate CDs chirality, and explore new applications of chiral CDs as antihyperglycemic therapy for controlling blood glucose levels.
    Type of Medium: Online Resource
    ISSN: 1613-6810 , 1613-6829
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2168935-0
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  • 2
    In: Advanced Energy Materials, Wiley, Vol. 8, No. 34 ( 2018-12)
    Abstract: Hydrogen production from water splitting using photocatalysts and solar energy is an ideal pathway to obtain future energy sources which are cheap and easy to industrialize. In the water splitting process, the reduction of H 2 O gives H 2 , while H 2 O oxidation produces O 2 with hydrogen peroxide (H 2 O 2 ) in tiny amounts as a by‐product (poisoning the catalyst). It remains challenging to simultaneously produce H 2 O 2 and H 2 within one photocatalytic system. Inspired by a biological H 2 O 2 generator, chlorella, the authors firstly realize the simultaneous photocatalytic water splitting and biological H 2 O 2 generation by a living Chlorella vulgaris and carbon micro particle (needle coke) comodified g‐C 3 N 4 (C‐N‐g‐C 3 N 4 ) photocatalyst. The C‐N‐g‐C 3 N 4 exhibits the optimal H 2 O 2 (H 2 ) evolution rate of 0.98 µmol h −1 (0.84 µmol h −1 ), giving an apparent quantum efficiency of 0.86% for H 2 evolution at 420 nm. In this system, the needle coke serves as cocatalyst to work as reduction sites for H 2 evolution, while the living C. vulgaris plays the key role in the production of H 2 O 2 under the protection of g‐C 3 N 4 .
    Type of Medium: Online Resource
    ISSN: 1614-6832 , 1614-6840
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2594556-7
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  • 3
    In: Small, Wiley, Vol. 15, No. 23 ( 2019-06)
    Abstract: Multifunctional coatings, especially those with simultaneous antibiofilm formation and anticorrosion properties are of great significance for the marine industry. Inspired by the function of fish mucus of blackhead fish, a biological epidermal secretion with negative surface potential that protects blackhead fish from colonization of microorganisms, a concept is introduced to use negatively charged carbon nanodots (CDs) as a secure and economical dual‐functional additive to prepare protective coatings. The prepared CDs with strong negative surface potential initiate robust antibiofilm formation (antiadhesion and antibacteria) and anticorrosion properties (about 60 days' durability in seawater) of polymeric coatings. The incorporated CDs with negative surface potential take effect in the following ways: 1) suppressing bacterial adhesion by virtue of strong electrostatic repulsion; 2) sterilizing anchored bacteria via destroying bacterial cell walls; 3) impeding electron ejection from the metallic surface; and 4) blocking aggressive species (H 2 O and O 2 ) by narrowing the microchannels. This work provides a new train of thought propelling the development of potential materials for industrial and engineering applications.
    Type of Medium: Online Resource
    ISSN: 1613-6810 , 1613-6829
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2019
    detail.hit.zdb_id: 2168935-0
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  • 4
    In: ChemistrySelect, Wiley, Vol. 3, No. 3 ( 2018-01-23), p. 904-910
    Abstract: Utilizing semiconductor photocatalysts and solar energy for hydrogen evolution is an ideal way to solve the energy shortage and environmental pollution problem in the future. The CoO as photocatalyst with high solar‐to‐hydrogen efficiency has attracted wide attention, but its stability is low. Herein, we designed a disordered CoO 1.6 C 0.7 nanocomposite as photocatalyst, which exhibits improved photocatalytic activity and stability for hydrogen evolution without sacrificial reagent compared with that of CoO 1.2 . By adding carbon dots (CDs) during the synthesis process, the obtained CoO 1.6 C 0.7 nanocomposite as photocatalyst could acquire the H 2 evolution rate about 2.6 μmol h −1 under visible light (λ 〉 420 nm), while the H 2 evolution rate increased to 18.0 μmol h −1 when used triethanolamine (TEOA) as sacrificial reagent. Moreover, the disordered CoO 1.6 C 0.7 photocatalyst displays excellent stability with more than 10 cycles. The improved photocatalytic activity and favorable stability of the disordered CoO 1.6 C 0.7 can be attributed to the addition of CDs, which enhanced the light absorption and accelerated electron transfer.
    Type of Medium: Online Resource
    ISSN: 2365-6549 , 2365-6549
    URL: Issue
    Language: English
    Publisher: Wiley
    Publication Date: 2018
    detail.hit.zdb_id: 2844262-3
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