As an economical, environmentally friendly, and highly efficient separation technology, membrane separation is a popular research topic in the field of separation. Organic polymer materials have attracted considerable...
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The S-scheme heterojunction is flourishing in photocatalysis because it concurrently realizes separated charge carriers and sufficient redox ability. Steady-state charge transfer has been confirmed by other methods. H...
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The S-scheme heterojunction is flourishing in photocatalysis because it concurrently realizes separated charge carriers and sufficient redox ability. Steady-state charge transfer has been confirmed by other methods. However, an essential part, the transfer dynamics in S-scheme heterojunctions, is still missing. To compensate, a series of cadmium sulfide/pyrene- alt -difluorinated benzothiadiazole heterojunctions were constructed and the photophysical processes were investigated with femtosecond transient absorption spectroscopy. Encouragingly, an interfacial charge-transfer signal was detected in the spectra of the heterojunction, which provides solid evidence for S-scheme charge transfer to complement the results from well-established methods. Furthermore, the lifetime for interfacial charge transfer was calculated to be ca. 78.6 ps. Moreover, the S-scheme heterojunction photocatalysts exhibit higher photocatalytic conversion of 1,2-diols and H 2 production rates than bare cadmium sulfide.
Substrate plate heating is one of the methodology followed during the selective laser melting (SLM) process, to reduce the cooling rate of the process, to reduce the internal stresses in the SLM-fabricated material, t...
Substrate plate heating is one of the methodology followed during the selective laser melting (SLM) process, to reduce the cooling rate of the process, to reduce the internal stresses in the SLM-fabricated material, to reduce the cracking tendency in some alloys. However, employing substrate plate heating with larger samples may introduce anisotropy and inhomogeneity in both microstructure and properties. To study this effect, Al-12Si samples were fabricated using the SLM process. The samples were produced with (473 K and 673 K) and without substrate plate heating. The sample was also subjected to external treatment at 473 K and 673 K to compare the microstructural effects with the substrate plate-heated samples. The microstructural investigation was carried out using optical and scanning electron microscopy and the structural characterization using X-ray diffraction. The mechanical properties of the samples were tested using room temperature tensile test and hardness maps. The results suggest that the samples fabricated using substrate plate heating lead to anisotropy along the length scale, which is not desirable.
Fabricated through a newly developed hot-warm rolling process,Zn-0.8 Li(wt%)alloy has ideal strength and ductility far beyond the mechanical benchmark of materials for biodegradable *** of needle-like Zn in primary p-...
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Fabricated through a newly developed hot-warm rolling process,Zn-0.8 Li(wt%)alloy has ideal strength and ductility far beyond the mechanical benchmark of materials for biodegradable *** of needle-like Zn in primary p-LiZn4 phase is observed in Zn-Li alloy for the first *** relationship between them can be described as[1-213]β//[2-1-10](Zn),(10-10)βabout 4.5°from(0002)(Zn).Zn grains with an average size of 640 nm exhibit strong basal texture,detected by transmission electron back-scatter *** distribution is determined by three-dimensional atom probe,which reveals the formation of nano-sized metastableα-Li2Zn3 precipitates with a number density of 7.16×10^22 m^-*** fine lamellar Zn+β-LiZn4 structure,sub-micron grains and the nano-sized precipitates contribute to the superior mechanical properties.
Correction for ‘In situ construction of a continuous ionic conductive coating for a high-performance Li3VO4 anode’ by Lulu Wang et al., Inorg. Chem. Front., 2024, 11, 1177–1185, https://***/10.1039/D3QI02235H.
Correction for ‘In situ construction of a continuous ionic conductive coating for a high-performance Li3VO4 anode’ by Lulu Wang et al., Inorg. Chem. Front., 2024, 11, 1177–1185, https://***/10.1039/D3QI02235H.
Electrochemical CO 2 reduction can convert CO 2 to value-added chemicals, but its selectivity toward C 3+ products are very limited. One possible solution is to run the reactions in hybrid processes by coupling electr...
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Electrochemical CO 2 reduction can convert CO 2 to value-added chemicals, but its selectivity toward C 3+ products are very limited. One possible solution is to run the reactions in hybrid processes by coupling electrocatalysis with other catalytic routes. In this contribution, we report the cascade electrocatalytic and thermocatalytic reduction of CO 2 to propionaldehyde. Using Cu(OH) 2 nanowires as the precatalyst, CO 2 /H 2 O is reduced to concentrated C 2 H 4 , CO, and H 2 gases in a zero-gap membrane electrode assembly (MEA) reactor. The thermochemical hydroformylation reaction is separately investigated with a series of rhodium-phosphine complexes. The best candidate is identified to be the one with the 1,4-bis(diphenylphosphino)butane diphosphine ligand, which exhibits a propionaldehyde turnover number of 1148 under a mild temperature and close-to-atmospheric pressure. By coupling and optimizing the upstream CO 2 electroreduction and downstream hydroformylation reaction, we achieve a propionaldehyde selectivity of ~38 % and a total C 3 oxygenate selectivity of 44 % based on reduced CO 2 . These values represent a more than seven times improvement over the best prior electrochemical system alone or over two times improvement over other hybrid systems.
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