Electron donors are widely exploited in visible-light photocatalytic hydrogen *** a typical electron donor pair and often the first choice for hydrogen production,the sodium sulfide-sodium sulfite pair has been extens...
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Electron donors are widely exploited in visible-light photocatalytic hydrogen *** a typical electron donor pair and often the first choice for hydrogen production,the sodium sulfide-sodium sulfite pair has been extensively ***,the resultant thiosulfate ions consume the photogenerated electrons to form an undesirable pseudocyclic electron transfer pathway during the photocatalytic process,strongly limiting the solar energy conversion ***,we report novel and bioinspired electron donor pairs offering a noncyclic electron transfer pathway that provides more electrons without the consumption of the photogenerated *** to the state-of-the-art electron donor pair Na_(2)S-Na_(2)SO_(3),these novel Na_(2)S-NaH_(2)PO_(2)and Na_(2)S-NaNO_(2)electron donor pairs enable an unprecedented enhancement of up to 370%and 140%for average photocatalytic H_(2)production over commercial CdS nanoparticles,and they are versatile for a large series of photocatalysts for visible-light water *** discovery of these novel electron donor pairs can lead to a revolution in photocatalysis and is of great significance for industrial visible-light-driven H_(2)production.
Refractory metal high-entropy nitride (RHEN) coatings have attracted significant attention for extreme environmental applications due to their outstanding mechanical properties. However, traditional trial-and-error me...
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Sb is a very effective dopant for ZrNiSn based half-Heusler *** effect of Ti substitution on Zr0.75Hf0.25NiSn0.985Sb0.015half-Heusler(HH) semiconductor alloys has been investigated to explore the structural modifica...
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Sb is a very effective dopant for ZrNiSn based half-Heusler *** effect of Ti substitution on Zr0.75Hf0.25NiSn0.985Sb0.015half-Heusler(HH) semiconductor alloys has been investigated to explore the structural modifications and composition ***0.25Zr0.75-xNiSn0.985Sb0.015(x=0,0.15,0.30,0.45) alloys were synthesized by induction melting.A set of samples was also annealed for comparative *** samples were then sintered using plasma activated sintering(PAS) *** results confirmed the existence of ZrNiSn type HH *** electron(BSE) images showed phase separations in the *** substitution improved the carrier concentration and electrical conductivity of the ***,thermal conductivity was also significantly reduced due to the enhanced phonon ***,a ZT value of 1.11 at 873 K was obtained for 30% Ti substituted(annealed) sample.
The limited CO_(2)content in aqueous solution and low adsorption amount of CO_(2)on catalyst surface lead to poor photocatalytic CO_(2)reduction activity and ***,the design and fabrication of a novel photocatalytic ar...
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The limited CO_(2)content in aqueous solution and low adsorption amount of CO_(2)on catalyst surface lead to poor photocatalytic CO_(2)reduction activity and ***,the design and fabrication of a novel photocatalytic architecture is reported,accomplished via chemical vapor deposition of polymeric carbon nitride on carbon *** as-obtained samples with a hydrophobic surface exhibit excellent CO_(2)transport and adsorption ability,as well as the building of triphase air-liquid-solid(CO_(2)-H_(2)O-catalyst)joint interfaces,eventually resulting in the inhibition of H2 evolution and great promotion of CO_(2)reduction with a selectivity of 78.6%.The addition of phosphate to reaction environment makes further improvement of CO_(2)photoreduction into carbon fuels with a selectivity of 93.8%and an apparent quantum yield of 0.4%.This work provides new insight for constructing efficient photocatalytic architecture of CO_(2)photoreduction in aqueous solution and demonstrates that phosphate could play a key role in this process.
Incorporating magnetic nanoparticles in thermoelectric(TE)materials introduce magnetic interfaces with additional electron and phonon scattering mechanism for high TE ***,the influence of heterogeneous interfaces betw...
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Incorporating magnetic nanoparticles in thermoelectric(TE)materials introduce magnetic interfaces with additional electron and phonon scattering mechanism for high TE ***,the influence of heterogeneous interfaces between magnetic nanoparticles and TE matrix on electronic and thermal transport remains elusive in the thermo-electric-magnetic ***,using p-type TE material Bi_(0.3)Sb_(1.7)Te_(3)(BST)as matrix and magnetocaloric(MC)material La(Fe_(0.92)Co_(0.08))_(11.9)Si_(1.1)(LFS)nanoparticles as a second phase,TE/MC nanocomposites xLFS/BST(x=0.1%,0.2%,0.3% and 0.4%)were synthesized using spark plasma sintering *** atomic-resolution interfacial structures demonstrate that Te vacancies originating from LFS-BST interfacial reaction decreases the hole concentration of the LFS/BST nanocomposites and enhances the Seebeck *** LFS/BST nanocomposites exhibit lower thermal conductivity due to enhanced phonon scattering by interfaces and *** the nanocomposites have higher ZT than BST matrix,with 0.2% LFS/BST nanocomposite achieving highest ZT=1.11 at 380 *** working current 1.4 A,the device fabricated using 0.2% LFS/BST nanocomposite achieves maximal cooling temperature 4.9 K,which is 58% higher than the ***,the MC properties are retained in all the nanocomposites,which make them a promising candidate to achieve high TE performance and dual TE/MC properties for future applications.
Spectroscopy and mid-infrared laser performance are compared for Er:CaF2 single-crystal and hot-pressed transparent *** 2.8-µm Er:CaF2 crystal laser delivers 0.81 W with 32.6% slope efficiency and outperforms the...
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Bi2Te3-based alloys remain the only commercially available thermoelectric (TE) materials. However, their practical applications are severely constrained by the inferior mechanical performance of the zone melting (ZM) ...
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In bone repair, scaffold structural design is essential for optimizing mechanical performance and osteogenic potential. Gradient structural scaffolds are engineered to balance mechanical qualities and permeability whi...
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Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc-ion batteries(ZIBs).Herein,we report an ammonium vanadate(NH_(4)V_(4)O_(10)∙0.28H_(2)O,NHVO)aqueous ZIB cat...
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Main observation and conclusion The cathode material plays a crucial role in the performances of aqueous zinc-ion batteries(ZIBs).Herein,we report an ammonium vanadate(NH_(4)V_(4)O_(10)∙0.28H_(2)O,NHVO)aqueous ZIB cathode *** obtained NHVO microflowers manifest high discharge capacity(410 mA·h∙g^(-1) at 0.2 A∙g^(-1)).
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