Photocatalytic transformation of biomass into biofuels and value-added chemicals is of great significance for carbon ***-free carbon nitride has extensive applications but with almost no absorption and utilization of ...
详细信息
Photocatalytic transformation of biomass into biofuels and value-added chemicals is of great significance for carbon ***-free carbon nitride has extensive applications but with almost no absorption and utilization of near-infrared light,accounting for 50%of ***,a molten salt-assisted in-plane“stitching”and interlayer“cutting”protocol is developed for constructing a highly crystalline carbon nitride catalyst containing structural oxygen(HC-CN).HC-CN is highly efficient for the photothermal cascade transformation of biomass-derived glucose into lactic acid(LA)with an unprecedented yield(94.3%)at 25°C under full-spectrum light irradiation within 50 min,which is also applicable to quantitatively photo-upgrading various *** calculations expound that the light-induced glucose-to-catalyst charge transfer can activate the Cβ-H bond to promote the rate-determining step of intramolecular hydrogen shift in glucose-to-fructose ***,the introduced structural oxygen in HC-CN can not only facilitate the local electric field formation to achieve rapid charge transport/separation andregulate selective·O^(-)_(2)generation for oriented C3-C4 bond cleavage of fructose but also narrow the energy band gap to broaden the light absorption range of HC-CN,contributing to enhanced LA production without exogenous ***,HC-CN is highly recyclable and exhibits negligible environmental burden and low energy consumption,as disclosed by the life cycle *** construction of full-spectrum light adsorption and versatile reaction sites provides a reference for implementing multi-step biomass and organic conversion processes under mild conditions.
The fast development of molding industry requested higherrequirement for matrix material such as Ti(C, N)-based cermet, for which the heat resistance played an important role during service. However, soften and heat ...
详细信息
5A06 aluminum alloy exhibits excellent properties such as low density, high strength, and high electrical conductivity, which has been widely used in microwave communication components. However, the dense oxide film o...
5A06 aluminum alloy exhibits excellent properties such as low density, high strength, and high electrical conductivity, which has been widely used in microwave communication components. However, the dense oxide film on the Al alloy surface hinders its direct soldering with electronic components. In this study, Ti alloy mesh reinforced SAC305 active composite solder was employed to solder 5A06 Al alloy. The effects of soldering time on the microstructure and mechanical properties of joints were investigated. results showed that the reaction products in the solder seam changed from Al 3 (Ni, Cu) 2 , Al 2 Cu, and (Cu, Ni) 6 Sn 5 multiphase to the Al 3 (Ni, Cu) 2 single phase with the extension of soldering time. The diffusion of Al from the substrate into the solder seam controlled the phase transformation process of the microstructure. The increase of reaction products and the reinforcement of the Ti alloy skeletons in the solder seam improved the shear strength of joints, and the maximum strength value of 73.67 MPa was obtained for the joint soldered at 425 °C for 30 min with a pressure of 0.5 MPa.
To mitigate the disruption to traffic caused by pavement maintenance, bridge surface maintenance is often performed with half-open traffic, which involves the effects of vehicle-bridge coupling vibration on fresh conc...
详细信息
The closed working condition of grouting materials leads to insufficient curing water supply during their strength development. In this work, the superabsorbent polymer (SAP) was used as the internal curing agent for ...
详细信息
In this study, vanadium carbide (VC) and gas-atomized aluminum-chromium-silicon (AlCrSi) powders were used as novel hardmaterials to study the effect of their shrinkage rate, densification, phase evolution, and tough...
详细信息
AI in the classroom instruction of languages an exciting potential effect that is altering teaching strategies and student involvement. Everything is simply achievable, including chatbots and natural-language processi...
详细信息
Introduction of high entropy and high valence electron concentration (VEC) design criterion into TiC ceramic is a promising method for further improving its thermal stability and mechanical performance. Herein, struct...
详细信息
We reported a facile synthetic process to obtain highly efficient selective catalytic reduction catalysts by adopting the polyol process, and the prepared catalyst demonstrated high nitrogen oxide (NOx) removal effici...
详细信息
Combining microstructure characterization and electrochemical corrosion, the influence of σ phase precipitation behavior and Mo element corrosion resistance of three super austenitic stainless steels, 904L, 254SMo an...
详细信息
暂无评论