查找使用阿拉丁产品的科研文献

Fabrication of self-cleaning photocatalytic durable building coating based on WO3-TNs/PDMS and NO degradation performance

Guanyu Liu,Huiyun Xia,Yanhui Niu,Xu Zhao,Gengtong Zhang,Lifang Song,Huaxin Chen

Practical significance in terms of the long-term effective application of photocatalytic coatings is greatly challenged by its easy pollution and poor self-cleaning performance. In this paper, a self-cleaning photocatalytic WO 3 -TiO 2 nanorod (MWT) /PDMS building coating (MWT coating) was prepared by spraying methods. The surface hierarchical structure fabricated by MWT and PDMS was a crux to construct a superhydrophobic surface, which endowed MWT coating with self-cleaning performance. Besides, the MWT coating exhibited prominent durability and antifouling property after 450 d practical application of the external wall. The excellent self-cleaning property of the coating was confirmed by the removal and resistance to the adhesion of powder particles. Meanwhile, the photocatalytic properties of MWT endowed MWT coating with the ability to degrade organic pollutants on the surface. The color difference of the coating polluted by methyl red was only 1.18 and 4.77 after 24 h UV and visible irradiation, respectively. This mutual benefit effect of self-cleaning and photocatalysis was also reflected in the degradation of NO. In the first five cycles, the degradation efficiency of NO decreased by 4.74% gradually under visible light due to the adhesion of oxidation products, and most of the MWT on the coating surface was regenerated after flushing, the PCD efficiency increased by 3.71%. Furthermore, after 30 days of outdoor weathering test, the PCD efficiency of MWT coating decreased by 11.74% and 12.05% under UV and visible light, respectively, which lays a foundation for the long-term effectiveness of the MWT coating in the process of use.

Cu-doped Cs2AgI3 Composite Loaded Plastic Scintillators for X-ray and Thermal Neutron Detection

Wanting Gui,Lu Yao,Xunsheng Zhou,Qi Wu,Chao Li,Shi Zhang,Yunfeng Zhan,Cai Lin Wang

Ag-based metal halide scintillators have recently attracted significant interest for X-ray imaging due to their high light yield and ultra-fast decay lifetime. These properties are advantageous for thermal neutron detection, yet their application in this area have not been thoroughly explored. In this article, we investigate the properties of Cu-doped Cs ₂ AgI ₃ metal halide scintillators for X-ray imaging and thermal neutron detection. A simple synthesis process was employed to produce Cu-doped Cs ₂ AgI ₃ scintillators. The as-prepared Cu-doped Cs ₂ AgI ₃ exhibited intense green emission with a photoluminescence quantum yield (PLQY) of 55 ± 2.7%. Cu-doped Cs ₂ AgI ₃ /PVDF plastic scintillation screen has been prepared and achieved a resolution of 5 lp/mm under X-ray radiation. A composite consisting of ⁶ LiF, Cu-doped Cs ₂ AgI ₃ , and Poly (methyl methacrylate) (PMMA) was utilized for thermal neutron detection, achieving a light yield of about 12,526±9 photons/thermal neutron, which is almost twice that of a commercial ⁶ Li-glass (GS20) scintillator (7000 photons/thermal neutron). Effective neutron-gamma pulse discrimination was achieved using a network dynamics digital filter, effectively separating thermal neutron events from gamma events.

High-Temperature Performance of 9,10-Diphenylanthracene Single Crystals for Fast Neutron Detection

Yingming Wang,Lingyan Xu,Lu Liang,Binghui Zhang,Zhentao Qin,Chongqi Liu,Lixiang Lian,Wei Zheng,Yanyan Lei,Qinzeng Hu,Shuai Song,Tao Wang,Wanqi Jie

Exploring organic single crystals that can reliably operate in high-temperature environments is crucial for advancing fast neutron detection in extreme conditions. In this study, large-sized (34 × 20 × 8 mm3) and high-quality 9,10-diphenylanthracene (DPA) single crystals were grown using a seed-assisted temperature-reduced crystallization method. The crystals showed strong thermal stability with a melting point of 252.4 °C. Under γ-ray excitation, the crystals demonstrated a high light yield of 25,776 photons/MeV with excellent linearity over a broad energy spectrum. Their radiation detection performance was systematically investigated under variable temperature conditions. Temperature-dependent pulse height spectrum revealed a steady increase in light output from -20 °C to 10 °C, followed by a significant decrease beyond 50 °C. However, the DPA detector retains 72.1% of its light output at 150 °C compared to 20 °C, demonstrating its excellent performance at high temperatures. Neutron/gamma pulse shape discrimination(PSD) was tested from −25 °C to 45 °C. At room temperature, the detector achieved a maximum figure of merit (FOM) of 3.82 at 2900 ± 100 keVee. Importantly, across the entire −25 °C to 45 °C range, the FOM remained above 1.5 for energies above 200 keVee, demonstrating stable PSD performance. These results collectively demonstrate the strong overall performance of DPA single crystals in both light yield and neutron/gamma discrimination. These findings underscore the great potential of DPA single crystals for fast neutron detection in high-temperature environments, establishing them as a valuable material for future applications in extreme conditions.

1981 Index IEEE Transactions on Nuclear Science Vol. NS-28

This index covers all technical items - papers, correspondence, reviews, etc. - that appeared in this periodical during the year, and items from previous years that were commented upon or corrected in this year. Departments and other items may also be covered if they have been judged to have archival value. The Author Index contains the primary entry for each item, listed under the first author's name. The primary entry includes the coauthors' names, the title of the paper or other item, and its location, specified by the publication abbreviation, year, month, and inclusive pagination. The Subject Index contains entries describing the item under all appropriate subject headings, plus the first author's name, the publication abbreviation, month, and year, and inclusive pages. Note that the item title is found only under the primary entry in the Author Index.

Quantitative design of perovskite X-ray flat-panel detectors enabled by numerical parameter optimization

Yuhao Zhang,Zimeng Li,Xin Zhang,Xulong Pang,Yihong Qi,Xiaokun Liang,Zonghai Sheng,Dong Liang,Hairong Zheng,Mengling Xia,Yongshuai Ge,Haodi Wu

Metal halide perovskites have emerged as promising candidates for direct X-ray detection owing to their strong attenuation, excellent charge transport, and low-temperature processability . High X-ray absorption efficiency requires thick perovskite layers, while increased thickness simultaneously raises the probability of charge carriers being trapped by defects, leading to an inherent trade-off. Achieving an optimal balance therefore requires careful optimization of key parameters such as absorber thickness and operating electric field. However, recent studies have not systematically optimized these detection parameters. Here, we establish a simulation framework based on cascaded linear system theory to systematically optimize the performance of MAPbI₃-based X-ray detectors. The model quantifies the trade-off between X-ray absorption and charge collection, identifying an optimal thickness of 460 μm and an electric-field range that maximizes sensitivity while preserving spatial resolution. Guided by the simulation, we fabricate pixelated detectors integrated with thin-film transistor backplanes. The optimized detector exhibits a high sensitivity of 6588 μC·Gy_air^-1·cm^-2 and a spatial resolution of 3.23 lp/mm at a 200 μm pixel size, in good agreement with theoretical predictions. Furthermore, the detector demonstrates high-quality two-dimensional and three-dimensional imaging capabilities, highlighting its potential for advanced medical and industrial X-ray imaging applications.

2,2,2-Trifluoroethyl nonafluorobutanesulfonate as bifunctional electrolyte additive for high-energy-density 4.5 V LiNi0.8Co0.1Mn0.1O2||Li batteries

Zhengping Ding,Ran Song,Yu Shen,Huahui Lin,Peng Wei,Xiangqun Zhuge,Ke Qu,Zhenzhong Yang,Yurong Ren

Combining a high cut-off voltage cathode with a high specific-capacity lithium metal anode offers a promising path toward ultra-high-energy-density batteries (> 400 Wh kg -1 ). However, the practical application of LiNi 0.8 Co 0.1 Mn 0.1 O 2 (NCM811)||Li batteries with a 4.5 V cut-off voltage is challenged by severe interface deterioration. This study introduces a novel bifunctional electrolyte additive called 2,2,2-Trifluoroethyl Nonafluorobutanesulfonate (TNS), designed to form a thin, robust electrolyte interface layer on both cathode and anode surfaces. Detailed analysis reveals that TNS decomposes and modifies the solid-electrolyte-interface layer. Through the synergistic effects of fluoride and sulfonate functional groups, the resulting cathode-electrolyte-interface (CEI) enhances the structural stability of NCM811 while providing a high-efficiency lithium-ion transport channel to accelerate Li + insertion and extraction. At a cut-off voltage of 4.5 V, NCM811||Li batteries with 1 % TNS (by weight) exhibit high discharge capacity retention of 74.2 % after 150 cycles at a 1C rate and 60.1 % after 150 cycles at a 2C rate. This study offers valuable insights for designing high-voltage electrolyte additives in ultra-high-energy-density lithium metal batteries.

Photoredox coupling of benzyl alcohol oxidation with CO2 reduction over CdS/TiO2 heterostructure under visible light irradiation

Ming-Yu Qi,Qiong Lin,Zi-Rong Tang,Yi-Jun Xu

Coupling CO 2 photoreduction with selective organic synthesis offers a promising modus operandi to enable simultaneous utilization of photogenerated electrons and holes to realize solar fuels production and chemicals synthesis. Herein, we report a bifunctional zero-dimensional cadmium sulfide quantum dots-two-dimensional titanium dioxide nanosheets (CdS/TNS) heterostructure for photoredox-catalyzed coupling of C–C bond synthesis via selective oxidation of benzyl alcohol with CO 2 photoreduction to CO under visible light. The compositing heterointerface is beneficial for the adsorption and activation of CO 2 , thereby promoting the photoreduction of CO 2 . Remarkably, the synergistic interaction between CdS and TNS tunes the selectivity of benzyl alcohol oxidation from carbonyl compound to the C–C coupled products. Mechanistic studies unveil that the generation of C–C coupled products processes via key radical •CH(OH)Ph intermediates. Theoretical simulations reveal that the weaker adsorption of •CH(OH)Ph radical over CdS/TNS than bare CdS contributes to the formation of highly selective C–C coupled products. The findings are expected to offer instructive guidance on rationally designing the dual-functional catalysts with efficient photoredox-catalyzed coupling reaction systems for integrating CO 2 reduction with selective organic transformations.

Single-cell analyzing of tumor microenvironment and cell adhesion between early and late-stage lung cancer

Chaonan Zhu,Zhiquan Chen,Shuai Wang,Junmei Cao,Yuan Cheng,Maogen Zheng

Lung adenocarcinoma (LUAD) is a highly heterogeneous disease that threaten human life with serious incidence and high mortality. High heterogeneity of tumor microenvironment (TME) was reported in multiple studies. However, the factor of controlling the tumor migration progression between eary and late-stage LUAD is still not fully understood. In this study, we conducted a comprehensive analysis of single-cell RNA sequencing (scRNA-seq) data of LUAD obtained from the GEO database. The identification of cell clusters revealed significant expansion of epithelial cells in late-stage patients. Interpretation of the cell-cell communication results between early-stage and late-stage patient samples indicated that early tumor cells may interact with epithelial cells through the TGF-β pathway to promote tumor progression. The cell cycle analysis demonstrated a significant increase in the number of cells in the G2 and M phases in late-stage lung cancer. Further analysis using Non-negative Matrix Factorization (NMF) revealed early-stage cell-specific gene features involved in cell adhesion-related biological processes. Among these, the Tensin (TNS) gene family, particularly TNS1, showed high expression in epithelial cells and fibroblasts of early-stage samples, specifically associated with cell adhesion. Survival analysis using TCGA database for LUAD demonstrated that patients with high expression of TNS1 exhibited significantly higher overall survival rates compared to those with low expression. Immunofluorescence experiments have demonstrated co-expression of TNS1 with fibroblast and tumor cell markers (α-SMA and EPCAM). Immunohistochemistry experiments further validated the significantly higher expression levels of TNS1 in early-stage LUAD tissues compared to late-stage lung cancer tissues (P<0.05). Pathway experiments have shown that early-stage tumor patients with high expression of TNS1 exhibit stronger phosphorylation levels of Akt and mTOR, indicating a more potent activation of the Akt/mTOR signaling pathway. In conclusion, the results of this study demonstrate that TNS1 is an adhesive molecule in the immune microenvironment of early-stage tumor cells, and it may serve as a novel prognostic marker for lug cancer.

Molecularly Imprinted Heterostructure-Assisted Laser Desorption Ionization Mass Spectrometry Analysis and Imaging of Quinolones

Ruya Wang,Weidong Zhang,Weiqiang Liang,Xiao Wang,Lili Li,Zhenhua Wang,Miaomiao Li,Jun Li,Chunxia Ma

Quinolone residues resulting from body metabolism and waste discharge pose a significant threat to the ecological environment and to human health. Therefore, it is essential to monitor quinolone residues in the environment. Herein, an efficient and sensitive matrix-assisted laser desorption/ionization mass spectrometry (MALDI/MS) method was devised by using a novel molecularly imprinted heterojunction (MIP-TNs@GCNs) as the matrix. Molecularly imprinted titanium dioxide nanosheets (MIP-TNs) and graphene-like carbon nitrides (GCNs) were associated at the heterojunction interface, allowing for the specific, rapid, and high-throughput ionization of quinolones. The mechanism of MIP-TNs@GCNs was clarified using their adsorption properties and laser desorption/ionization capability. The prepared oxygen-vacancy-rich MIP-TNs@GCNs heterojunction exhibited higher light absorption and ionization efficiencies than TNs and GCNs. The good linearity (in the quinolone concentration range of 0.5–50 pg/μL, R2 > 0.99), low limit of detection (0.1 pg/μL), good reproducibility (n = 8, relative standard deviation [RSD] < 15%), and high salt and protein resistance for quinolones in groundwater samples were achieved using the established MIP-TNs@GCNs–MALDI/MS method. Moreover, the spatial distributions of endogenous compounds (e.g., amino acids, organic acids, and flavonoids) and xenobiotic quinolones from Rhizoma Phragmitis and Rhizoma Nelumbinis were visualized using the MIP-TNs@GCNs film as the MALDI/MS imaging matrix. Because of its superior advantages, the MIP-TNs@GCNs–MALDI/MS method is promising for the analysis and imaging of quinolones and small molecules.