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The rapid flame annealing (FA) method has the advantages of convenience and rapidity with an instantaneous temperature rise and fall process. In this work, the influence of flame annealing duration on the front side and back side of CuBiO-based photocathodes was investigated, and photoelectrodes with variable compositions were obtained. A highly efficient CuO@CuO/CuBiO photoelectrode was successfully obtained via a two-step FA method within a few seconds. Excellent hydrogen evolution reaction performance with a photocurrent of 2.3 mA cm @ 0.2 V in 0.1 M NaSO (2.35 mA cm @ 0.6 V in 0.1 M KOH) electrolyte was obtained, which is the highest photocurrent of a CuBiO-based photoelectrode in a neutral electrolyte without a trapping agent so far. The light capture efficiency of the photoelectrode was greatly improved by the introduction of CuO, which formed a heterojunction with CuBiO to promote the charge separation ability. Our work shows the universality of rapid flame annealing in the fabrication of materials, especially for temperature-sensitive compositions.
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http://dx.doi.org/10.1021/acsami.4c17198 | DOI Listing |
ACS Appl Mater Interfaces
December 2024
Key Laboratory of Photonic and Electronic Bandgap Materials, Ministry of Education, School of Physics and Electronic Engineering, Harbin Normal University, Harbin 150025, China.
The rapid flame annealing (FA) method has the advantages of convenience and rapidity with an instantaneous temperature rise and fall process. In this work, the influence of flame annealing duration on the front side and back side of CuBiO-based photocathodes was investigated, and photoelectrodes with variable compositions were obtained. A highly efficient CuO@CuO/CuBiO photoelectrode was successfully obtained via a two-step FA method within a few seconds.
View Article and Find Full Text PDFSmall
December 2024
State Key Laboratory of Structural Analysis, Optimization and CAE Software for Industrial Equipment, National Engineering Research Center for Advanced Polymer Processing Technology, Zhengzhou University, Zhengzhou, 450002, China.
Aerogel fibers uniting characteristics of both aerogels (lightweight and porosity) and fibers (flexibility and wearability) exhibit a great potential for the production of the next generation of thermal protection textiles; still, the complex drying procedures and mechanical brittleness remain the main obstacles toward further exploitation. Herein, flexible and robust aramid nanofiber aerogel fibers (ANAFs) are scalably prepared by continuous wet-spinning coupled with fast air-drying. This synthesis involves calcium ions (Ca⁺) cross-linking and solvent displacement by low surface tension solvents, to enhance skeleton strength and reduce the capillary force during evaporation, respectively, thus minimizing shrinkage to 29.
View Article and Find Full Text PDFToxicol Sci
November 2024
Nicholas School of the Environment, Levine Science Research Center, Duke University, Durham, NC 27710.
In utero exposure to polybrominated diphenyl ethers (PBDEs) is linked to adverse pregnancy and fetal health outcomes, including altered thyroid hormone (TH) levels. Despite their phase out, PBDEs are still commonly detected in newborn cord blood. While PBDEs can cross the placenta, few studies have separately assessed PBDEs or THs in the maternal and fetal placental tissues.
View Article and Find Full Text PDFACS Appl Mater Interfaces
December 2024
State Key Laboratory of Fine Chemicals and Department of Polymer Science and Engineering, Dalian University of Technology, Dalian 116024, China.
With the rapid development of science and technology, high-temperature-resistant resin systems are facing more severe challenges in extreme applications. To further improve the comprehensive thermal properties of phthalonitrile resins, an in situ generation of a high-temperature-resistant phthalonitrile resin achieving an organic-inorganic hybridization network is reported. A 3-aminophenol phthalonitrile containing -NH is used as a material to hybridize with prepared calcium phosphate nano-oligomers (CPOs), and the hybrid precursor is named as CAPN.
View Article and Find Full Text PDFNanomicro Lett
December 2024
Department of Materials Science and Engineering, Southern University of Science and Technology, Shenzhen, 518055, People's Republic of China.
The rapid development of communication technology and high-frequency electronic devices has created a need for more advanced electromagnetic interference (EMI) shielding materials. In response to this demand, a study has been conducted to develop multifunctional carbon nanofibers (CNFs)/polyaniline (PANI) aerogels with excellent electromagnetic interference shielding, flame retardancy, and thermal insulation performance. The process involved freeze-drying of electrospun CNFs and PANI nanoparticles followed by in situ growth PANI to coat the CNFs, creating the core-shell structured CNFs/PANI composite fiber and its hybrid aerogels (CP-3@PANI).
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