118 research outputs found
Sensitivity of Soil Organic Matter Priming to Warming Depends on Diurnal Temperature Cycle
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Biodegradable Polylactide/TiO2 Composite Fiber Scaffolds with Superhydrophobic and Superadhesive Porous Surfaces for Water Immobilization, Antibacterial Performance, and Deodorization
No full textIn this short communication, TiO2-nanoparticle-functionalized biodegradable polylactide (PLA) nonwoven scaffolds with a superhydrophobic and superadhesive surface are reported regarding their water immobilization, antibacterial performance, and deodorization. With numerous regular oriented pores on their surface, the as-fabricated electrospun porous PLA/TiO2 composite fibers possessed diameters in the range from 5 mu m down to 400 nm, and the lengths were even found to be up to the meters range. The PLA/TiO2 composite fiber surface was demonstrated to be both superhydrophobic and superadhesive. The size of the pores on the fiber surface was observed to have a length of 200 +/- 100 nm and a width of 150 +/- 50 nm using field-emission scanning electron microscopy and transmission electron microscopy. The powerful adhesive force of the PLA/TiO2 composite fibers toward water droplets was likely a result of van der Waals forces and accumulated negative pressure forces. Such a fascinating porous surface (functionalized with TiO2 nanoparticles) of the PLA/TiO2 composite fiber scaffold endowed it with multiple useful functions, including water immobilization, antibacterial performance, and deodorization
Spatial evolution investigation and analysis of traditional dwellings in Dongzhu Island village of Jiaodong region
No full textThe seaweed cottage is a traditional residence in the Jiaodong (胶东) region that has existed for hundreds of years. During its development, its architectural form was evidently reconstructed and redeveloped. Based on historical documents, interviews, field investigations, and mapping, the author summarizes the village environment, overall layout, and architectural attributes of Dongchu Island Village (东褚岛村, DIV) to address the common needs of historical heritage protection. In order to examine in depth, the spatial evolution of the five stages in the past one hundred years, the Wangs’ grocery seaweed courtyard located on the southwest corner of Middle Street was selected as a typical research object. Analyzed as two clues, the village and dwelling, three key factors are identified as influencing spatial change: Characteristics of the time, economic industry, and personnel structure
New Insight into Hydrogen Oxidation Reaction on La<sub>0.3</sub>Sr<sub>0.7</sub>Fe<sub>0.7</sub>Cr<sub>0.3</sub>O<sub>3-δ</sub>Perovskite as a Solid Oxide Fuel Cell Anode
No full textPreparation of a Novel Water-based Acrylic Multi-Thermal Insulation Coating
No full textTo efficiently improve the thermal insulation effect of coatings, a novel water-based acrylic multi-thermal insulation coating (multi-WATIC) combined with thermal obstruction, echo, and radiation was prepared. The category and ratio of thermal insulation functional fillers are crucial. First, water-based acrylic thermal insulation coating (WATIC) with single thermal insulation functional fillers was prepared, and the thermal insulation property tests were done. Thereafter, a novel multi-WATIC was prepared combined with the 3 thermal insulation functional fillers together, and the formula of the novel multi-WATIC was optimized based on single factor experiments by response surface methodology (RSM). Test results showed that multi-WATIC has excellent thermal insulation property, and the fitting result obtained by RSM is in good agreement with test data.DOI: http://dx.doi.org/10.5755/j01.ms.23.2.16090</p
Highly Soluble Dimethoxymethyl Tetrathiafulvalene with Excellent Stability for Non-Aqueous Redox Flow Batteries
No full textNon-aqueous redox flow batteries (RFBs) are highly attractive
for
grid-scale energy storage applications because of their independent
design of energy and power, high energy density and efficiency, easy
maintenance, and potentially low cost. In order to develop active
molecules with large solubility, excellent electrochemical stability,
and high redox potential for a non-aqueous RFB catholyte, herein,
two flexible methoxymethyl groups had been attached to a famous redox-active
tetrathiafulvalene (TTF) core. The strong intermolecular packing of
the rigid TTF unit was effectively depressed, leading to a dramatically
improved solubility of up to 3.1 M in conventional carbonate solvents.
The performance of the obtained dimethoxymethyl TTF (DMM-TTF) was
studied in a semi-solid RFB system with Li foil as the counter electrode.
When using porous Celgard as the separator, the hybrid RFB with 0.1
M DMM-TTF had two high discharge plateaus at 3.20 and 3.52 V and a
low capacity retention of 30.7% after 100 cycles at 5 mA cm–2. Replacing Celgard with a permselective membrane, the capacity retention
was increased to 85.4%. Further increasing the concentration of DMM-TTF
to 1.0 M and current density to 20 mA cm–2, the
hybrid RFB exhibited a high volumetric discharge capacity of 48.5
A h L–1 and an energy density of 154 W h L–1. The capacity was maintained at 72.2% after 100 cycles (10.7 days).
The great redox stability of DMM-TTF was revealed by UV–vis
and 1H NMR tests and verified by density functional theory
calculations. Therefore, the methoxymethyl group is an excellent group
to increase the solubility while maintaining the redox capability
of TTF for high-performance non-aqueous RFBs
Cotton fabric-based facile solar photocatalytic purification of simulated real dye wastes
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