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Copper Tantalate by a Sodium-Driven Flux-Mediated Synthesis for Photoelectrochemical CO Reduction.
Small Methods
January 2025
Liquid Sunlight Alliance, Lawrence Berkeley National Laboratory, 1 Cyclotron Rd, Berkeley, CA, 94720, United States.
Copper-tantalate, CuTaO (CTO), shows significant promise as an efficient photocathode for multi-carbon compounds (C) production through photoelectrochemical (PEC) CO reduction, owing to its suitable energy bands and catalytic surface. However, synthesizing CTO poses a significant challenge due to its metastable nature and thermal instability. In this study, this challenge is addressed by employing a flux-mediated synthesis technique using a sodium-based flux to create sodium-doped CTO (Na-CTO) thin films, providing enhanced nucleation and stabilization for the CTO phase.
View Article and Find Full Text PDFThermotropic reentrant isotropy and induced smectic antiferroelectricity in the ferroelectric nematic realm: comparing RM734 and DIO.
Soft Matter
January 2025
Department of Physics and Soft Materials Research Center, University of Colorado, Boulder, CO 80309, USA.
The current intense study of ferroelectric nematic liquid crystals was initiated by the observation of the same ferroelectric nematic phase in two independently discovered organic, rod-shaped, mesogenic compounds, RM734 and DIO. We recently reported that the compound RM734 also exhibits a monotropic, low-temperature, apolar phase having reentrant isotropic symmetry (the I phase), the formation of which is facilitated to a remarkable degree by doping with small (below 1%) amounts of the ionic liquid BMIM-PF. Here we report similar phenomenology in DIO, showing that this reentrant isotropic behavior is not only a property of RM734 but is rather a more general, material-independent feature of ferroelectric nematic mesogens.
View Article and Find Full Text PDFFunctionally Graded Oxide Scale on (Hf,Zr,Ti)B Coating with Exceptional Ablation Resistance Induced by Unique Ti Dissolving.
Adv Sci (Weinh)
January 2025
Shaanxi Key Laboratory of Fiber Reinforced Light-Weight Composites, State Key Laboratory of Solidification Processing, Northwestern Polytechnical University, Xi'an, 710072, China.
Multicomponent Ti-containing ultra-high temperature ceramics (UHTCs) have emerged as more promising ablation-resistant materials than typical UHTCs for applications above 2000 °C. However, the underlying mechanism of Ti improving the ablation performance is still obscure. Here, (Hf,Zr,Ti)B coatings are fabricated by supersonic atmospheric plasma spraying, and the effects of Ti content on the ablation performance under an oxyacetylene flame are investigated.
View Article and Find Full Text PDFFrom brushite to hydroxylapatite: A study on phosphate mineral transformation and the fate of oxytetracycline.
J Contam Hydrol
January 2025
Hebei Key Laboratory of Crop Stress Biology, Hebei Normal University of Science and Technology, Qinhuangdao 066000, China.
Livestock manure, a common fertilizer in Chinese agriculture, can lead to environmental contamination and potential health risks due to elevated antibiotic and phosphorus levels. Importantly, the high phosphorus levels initiates transformations of phosphate minerals in soils, especially calcareous soils. These variations in phosphate mineralogy can significantly impact the migration and fate of antibiotics within the soil.
View Article and Find Full Text PDFOptimized detection of calcium ion in serum using constant potential coulometry with metastable liquid-liquid contact doping enhanced PEDOT: PSS ink.
Bioelectrochemistry
January 2025
School of Chemistry, Sun Yat-Sen University, Guangzhou 510275, People's Republic of China; Key Laboratory for Polymeric Composite & Functional Materials of Ministry of Education, School of Chemistry, Sun Yat-sen University, Guangzhou 510275, People's Republic of China.
Highly stable calcium ion selective electrodes (Ca-ISEs) were developed by drop-casting a layer of poly(3,4-ethylenedioxythiophene): polystyrene sulfonate (PEDOT: PSS) as an ion-to-electron transfer layer onto Au electrode. The conductive PEDOT: PSS ink was prepared using a metastable liquid-liquid contact (MLLC) doping method, which induced phase separation, removed excess PSS, and significantly enhanced charge transfer kinetics and conductivity. The resulting Ca-ISEs exhibited excellent electrochemical performance.
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