LUMINESCENCE
·
2026
·Vol. 41
·期 3
·e70466
·
IF 2.8
Qian Sun,Lu Ren,Shuangbao Li,Zian Wang,Jing Liu,Zhaoyun Yang,Dawei Zhang
A simple Schiff base probe ( E )- N′ -(1-(3-oxo-3 H -benzo[f]chromen-2-yl)ethylidene) picolinohydrazide (CHH) was synthesized and characterized by Fourier transform infrared spectroscopy (FT-IR), 1 H nuclear magnetic resonance spectra ( 1 H NMR), 13 C nuclear magnetic resonance spectra ( 13 C NMR), and high-resolution mass spectrometry (HR-MS). The probe CHH shows high sensitivity and selectivity for the recognition of Cu 2+ in EtOH-H 2 O (1:1, v/v), and exhibits an enhanced fluorescence phenomenon. The binding constant of CHH for Cu 2+ is 2.74 × 10 5 M −1 , and the binding stoichiometry of CHH and Cu 2+ is 1:1. The fluorescence intensity of CHH (10 μM) is well linearized with the Cu 2+ concentration at 0–10 μM, and it has a detection limit of 1.42 nM, which is lower than the detection limits of most similar probes. The reusability of the probe was evaluated by successively adding Cu 2+ and disodium ethylenediaminetetraacetate (Na 2 EDTA) to the CHH solution. The probe CHH was used to quantitatively detect Cu 2+ in actual water samples from different water sources. The recovery rates were within an acceptable range, indicating that the probe CHH can be used for the quantitative detection of Cu 2+ in actual water samples. Furthermore, the probe was applied for fingerprint detection, showing great potential in fingerprint detection and anti-counterfeiting.
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高影响因子
JOURNAL OF COLLOID AND INTERFACE SCIENCE
·
2026
·
IF 9.6
Chenxi Gao,Changcun Han,Hao Xiang,Zhuo Peng,Yinbo Tong,Chengyi Zhang,Hui Lv,Yizhong Huang
Precise control of the photogenerated charge dynamics and the electronic configuration of active sites is key to enhancing the performance of photocatalytic hydrogen-producing materials. Here, we report an efficient one-pot strategy to prepare sulfur-doped g-C 3 N 4 (SCN). Furthermore, a PtNd/SCN composite photocatalyst was successfully fabricated by loading a platinum (Pt)‑neodymium (Nd) alloy onto the SCN surface via an H 2 reduction method. Using trithiocyanuric acid as a single precursor to supply C, N, and S enables uniform S doping within the g-C 3 N 4 framework, broadening the light absorption range and optimizing the band structure. Pt serves as the primary hydrogen-evolving active site, while Nd acts as an “electronic co-catalyst” for Pt, forming strong electronic interactions through its unique 4f orbital structure. HRTEM and XPS analyses confirm the formation of a Pt Nd alloy interface and directional electron transfer from Nd to Pt, effectively modulating the Pt d-band center and optimizing the adsorption free energy of hydrogen intermediates, thereby significantly enhancing hydrogen evolution reaction (HER) kinetics. The experimental results show that the optimized PtNd/SCN composite photocatalyst exhibits a markedly enhanced photocatalytic hydrogen production rate under simulated sunlight, reaching 5468 μmol·g −1 ·h −1 —5 times higher than Pt/CN (1074 μmol·g −1 ·h −1 ) and 1.3 times that of Pt/SCN (4076 μmol·g −1 ·h −1 ). PL, TRPL, and photoelectrochemical measurements confirm that the introduction of Nd promotes the migration of photo-generated electrons from SCN to Pt, thereby significantly suppressing carrier recombination. This study reveals the unique mechanism by which the rare earth element Nd acts as an electronic regulator for the d-band center of Pt, providing new insights into the design of photocatalytic systems with low Pt loading. Download: Download high-res image (144KB) Download: Download full-size image
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SEPARATION AND PURIFICATION TECHNOLOGY
·
2023
·
IF 8.6
Lidan Xie,Wenyi Huang,Guoqiang Jiang,Yi Liu,Mude Zhu,Yi Tang,Xueqin Chen,Xiaoyun Fan
The wide occurrence of metronidazole (MNZ) in aquatic environment has aroused increasing concern to the potential adverse effects on human health. Combining different motifs into a photolytic material to achieve high photocatalytic efficiency is regarded as one of the main strategies during photocatalytic process. Herein, a triple anions contained photocatalyst , Ba 3 (BO 3 )(CO 3 )F (BBCF), exhibited excellent removal efficiency of MNZ (92.6%) in 15 min, which was 5.87 times higher than that of commercial P25. The excellent removal efficiency could be attributed to the strong electronegativity of the F − , and the π-conjugated triangles structure of (BO 3 ) 3− and (CO 3 ) 2− , which made BBCF facilitate the transport of photogenerated electrons, thus accelerating the accumulation of active h + . Meanwhile, the appropriate reduction potential of BBCF accounted for the outstanding productivity of O 2 – . h + and O 2 – were proved as the dominant reactive species for MNZ degradation. The degradation products were analyzed by LC-TOF-MS, and the toxicity of the intermediate was evaluated to be lower than that of parent MNZ molecule. Moreover, BBCF showed the universal application of degrading oxytetracycline (OTC), methylene blue (MB). Therefore, anion-rich BBCF catalyst with high catalytic activity has a potential application prospect for degrading harmful pollutants in practical water environment.
研究领域:
环境科学
·
材料科学
·
化学工程
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高影响因子
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
·
2025
·Vol. 108
·期 10
·e70008
·
IF 3.8
Ying Xue,Zhuo Wang,Caidan Hou,Xin Li,Zixiong Sun
In TiO 2 colossal dielectric ceramics co-doped with In 3+ and Nb 5+ , the electron-pinned defect-dipoles effect is strongly influenced by the adjacent and overlapping interaction between diamond ( Nb 2 5 + Ti 3 + A Ti ${\mathrm{Nb}}_{\mathrm{2}}^{{\mathrm{5 + }}}{\mathrm{Ti}}^{{\mathrm{3 + }}}{{\mathrm{A}}}_{{\mathrm{Ti}}}$ (A = Ti 4+ /In 3+ /Ti 3+ )) and triangle ( In 2 3 + V O · · Ti 3 + ${\mathrm{In}}_{\mathrm{2}}^{{\mathrm{3 + }}}V_{\mathrm{O}}^{ \cdot \cdot }{\mathrm{Ti}}^{{\mathrm{3 + }}}$ ) defect clusters. Although acceptor doping introduces oxygen vacancies ( V O · · $V_{\mathrm{O}}^{ \cdot \cdot }$ ) that facilitate the formation of triangular ( In 2 3 + V O · · Ti 3 + ${\mathrm{In}}_{\mathrm{2}}^{{\mathrm{3 + }}}V_{\mathrm{O}}^{ \cdot \cdot }{\mathrm{Ti}}^{{\mathrm{3 + }}}$ ) defect clusters, this doping inevitably results in the presence of additional diamond ( Nb 2 5 + Ti 3 + A Ti ${\mathrm{Nb}}_{\mathrm{2}}^{{\mathrm{5 + }}}{\mathrm{Ti}}^{{\mathrm{3 + }}}{{\mathrm{A}}}_{{\mathrm{Ti}}}$ (A = In 3+ )) defect clusters. Unfortunately, this structure complexity hinders a clear understanding of the intrinsic relationship between the colossal dielectric properties and low-temperature dielectric relaxation associated with individual defect clusters. Therefore, creating novel defect clusters to achieve high electron localization is crucial for the advanced TiO 2 -based ceramics. Herein, a colossal dielectric constant of up to 3.4 × 10 4 and a low dielectric loss of 0.044 are observed at 1 kHz and room temperature for the first time in cation–anion (In 3+ and F − ) co-doped TiO 2 ceramics. Meanwhile, the materials exhibit excellent frequency stability and meet the temperature requirements defined by the X9R standard. Dielectric relaxation associated with electrons in the low-temperature range of 2–30 K is attributed to the generation of novel diamond defect clusters ( In 3 + Ti 4 + F 2 − ${\mathrm{In}}^{3+}{\mathrm{Ti}}^{4+}{\mathrm{F}}_{2}^{-}$ ). Combined with density functional theory calculations, the notable electronegativity of F − promotes electron localization without relying on V O · · $V_{\mathrm{O}}^{ \cdot \cdot }$ -related defect clusters formations. Overall, the study presents a novel strategy for designing next-generation colossal dielectric ceramics.
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高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Tao Zhou,Yanjun Chen
The advancement of Na 3 V 2 (PO 4 ) 3 has been impeded by its subpar kinetic characteristics, resulting in suboptimal electrochemical performance . In this case, a dual modification strategy involving Ta and F co-doping is employed, along with the incorporation of carbon nanotubes (CNTs), is introduced. Notably, the substitution of high-valence Ta 5+ for V 3+ ions induces an n-type doping effect, thereby increasing the density of free electrons and enhancing electrochemical performance. Moreover, Ta 5+ possesses a comparatively larger ionic radius than V 3+ , which enhances the ease of Na + transport, leading to an increased rate of ionic diffusion. Furthermore, Ta 5+ ions play a crucial role in reinforcing the crystal structure, thereby strengthening the stability of the NVP system. Importantly, during the high-temperature calcination process, the reduction of carbon results in the conversion of Ta 5+ to Ta 3+ , forming a novel conductive TaN phase through its reaction with N 2 . This TaN phase, known for its high conductivity, intercalates into the NVP bulk as interlayers, forming beneficial grain boundaries. Thanks to this unique TaN//NVP heterojunction , the migration of Na + ions is notably accelerated along the grain boundaries rather than within the NVP bulk. The introduction of F contributes to reducing the grain size of active particles, consequently shortening the pathways for Na + migration and improving kinetic properties. Moreover, the presence of carbon layers and the encapsulation of CNTs collaboratively construct a highly conductive cross-linking network, elevating both electronic conductivity and mitigating NVP particle aggregation during high-temperature sintering. Consequently, the modified NVTPF0.07/@CNTs sample exhibits outstanding performance in both half and full cells, underscoring its substantial potential for application in the field of sodium-ion batteries.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机固体化学
·
纳米复合材料
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高影响因子
APPLIED CATALYSIS B-ENVIRONMENTAL
·
2013
·
IF 5.825
Fa-tang Li,Xiao-jing Wang,Ye Zhao,Ji-xing Liu,Ying-juan Hao,Rui-hong Liu,Di-shun Zhao
A facile and green method was developed for the simultaneous doping of nitrogen, boron, and fluorine in TiO 2 by H 2 TiO 3 via a microwave-assisted route. The ionic liquid (IL) [BMIm]BF 4 serves not only as microwave absorbent but also as a dopant. The IL also shows the ability to self-assemble under microwave irradiation, which causes it to act as an inhibitor for the growth of the TiO 2 particles. The N–B–F-tri-doped TiO 2 obtained exhibits large specific surface area, small crystal size, and a mesoporous structure, and the mechanism for the formation of the N–B–F-tri-doped TiO 2 was proposed. The prepared materials exhibit excellent visible light photocatalytic activity in the degradation of organic pollutants, including methyl orange, rhodamine B, Orange G, and reactive red X, which is attributed to the presence of a Ti–B–N structure on the TiO 2 surface, inducing a narrow band gap of 2.78 eV, and the synergistic effects of N, B, and F, which improve the separation efficiency of the photo-generated electron/hole pairs. The results obtained may provide a new sight for the application of ILs in the microwave-assisted preparation of nanomaterials.
研究领域:
材料科学
·
光催化
·
纳米材料
·
绿色化学
·
环境工程
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高影响因子
JOURNAL OF LUMINESCENCE
·
2022
·
IF 4.171
Chenfei Xiang,Xiuping Wu,Yanjie Zhang,Zihan Zhao,Desheng Li,Hao Song,Bing Li
White light with excellent color rendering property has been highly required for comfortable and healthy illumination. A facile strategy to achieve high color rendering index (Ra >90) in practical applications is using near ultraviolet chips as excitation sources combined with RGB phosphors. However, achieving high color rendering with both blue chips and near-ultraviolet (NUV) chips for commercial phosphors dispersed in phosphor-in-glass (PiGs) materials is still a big challenge. In this work, the PiG based on the ultra-low melting point Sn–F–P–O glass with commercial green (Lu 3 Al 5 O 12 :Ce 3+ ) and red (Sr x Ca 1-x AlSiN 3 :Eu 2+ ) phosphors has been successfully fabricated by one-step sintering method. The phase identification and distribution of monochromatic red phosphor in glass (R-PiG) and green phosphor in glass (G-PiG) were investigated in detail. The Sn 2+ ions in Sn–F–P–O matrix show the intense blue emission bands centered at 420 nm under the excitation of NUV chips (365 nm). Notably, the polychromatic red/green phosphor in glasses (R/G-PiGs) are versatile and exhibited excellent color rendering (Ra = 93, Ra = 95, Ra = 92, respectively) properties excited by both blue chips, NUV chips and laser diodes (WLD). The working temperature of R/G-PiGs is stable at ∼33 °C and ∼55 °C when employed in WLEDs/WLDs (1 W), which greatly prevented the phenomenon of “thermal quenching” for the phosphors caused by high temperature. Thus, the versatile R/G-PiG with ultra-high color rendering and excellent thermal properties indicates its promising application in high-power white LEDs/LDs.
研究领域:
材料科学
·
光电子学
·
固态照明
·
荧光粉技术
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高影响因子
Food Frontiers
·
2022
·Vol. 4
·期 1
·289-296
·
IF 0
Hongting Deng,Yuanju He,Hui Cao,Lei Chen,Hui Teng
The aim of the present work was to evaluate different structures of flavonoids interfering with the cytotoxicity of heterocyclic amines (HCA). Eight flavonoids with similar structure including myricetin, rutin, fisetin, quercetin, myricetrin, quercetrin, kaempferol, and galangin were coincubated with 2-amino-4-methylimidazo[4,5-f]quinolone (IQ) respectively to determine the cytotoxicity. The results revealed that IQ at low doses showed no cytotoxicity; however, in the presence of myricetin and rutin, the cytotoxicity significantly elevated. It seems that C-3′, C-4′, C-5′, and C-5 hydroxyl substituents on the flavonoid skeleton of B ring play important role in the increasing cytotoxicity induced by IQ in HepG2 cells. Interestingly, the data obtained from the present study revealed an unexpected adverse effect of the supposed beneficial food ingredient myricetin, which appears to be able to increase the cytotoxicity of the procarcinogen HCA.
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APPLIED CATALYSIS B-ENVIRONMENTAL
·
2022
·
IF 24.319
Zhen Chen,Shipeng Geng,Yawen Wang,Yi Wang,Shuqin Song
H 2 O 2 production by 2 electron water oxidation reaction (2e - WOR) is a promising approach, but still lacks mechanistic studies especially from a dynamic point of view. The interfacial water behavior on the solid/liquid interface is believed to play a crucial role in WOR activity. Here, F modification was used to accommodate the structure and dynamic process of interfacial water on WO 3 surface and boost the 2e- WOR activity. Electrochemical measurement, Raman spectra and computational techniques were used to investigate the mechanism. F modification was proved to guide the dipole moments of interfacial water molecules towards WO 3 surface, meaning more difficult to flip interfacial water molecules to perform the first step of WOR, in turn resulting in easy desorption of HO* and O-O*, thus benefiting for 2 e - WOR. This work paves a novel insight to understand mechanism of 2 e - WOR and rationally design the electrocatalysts for H 2 O 2 production from water.
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高影响因子
Nanomaterials
·
2022
·Vol. 12
·期 2
·213
·
IF 5.719
Hongli Ye,Lukai Zhao,Xinghui Ren,Youqiong Cai,Hai Chi
An approach to the detection of F−ions in food samples was developed based on a “switch-off-on” fluorescence probe of silicon nanoparticles (SiNPs). The fluorescence of the synthetic SiNPs was gradually quenched in the presence of Fe3+ion and slightly recovered with the addition of F−ion owing to the formation of a stable and colorless ferric fluoride. The fluorescence recovery exhibited a good linear relationship (R2= 0.9992) as the concentration of F−ion increased from 0 to 100 μmol·L−1. The detection limit of the established method of F−ion was 0.05 μmol·L−1. The recovery experiments confirmed the accuracy and reliability of the proposed method. The ultraviolet–visible spectra, fluorescence decays, and zeta potentials evidenced the fluorescence quenching mechanism involving the electron transfer between the SiNPs and Fe3+ion, while the fluorescence recovery resulted from the formation of ferric fluoride. Finally, SiNPs were successfully applied to detect F−ions in tap water, Antarctic krill, and Antarctic krill powder.Keywords:determination;Fe3+ion;F−ion;fluorescence switch-off-on;silicon nanoparticles;Antarctic krill
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PubMed
高影响因子
Journal of Environmental Sciences
·
2022
·
IF 6.796
Yunhao Zhang,Yi Qian,Ming Zhang,Weichuan Qiao
The wastewater discharge from the process of chrome plating, which contains 6:2 chlorinated polyfluorinated ether sulfonate (F-53B) and chromium (Cr), may be toxic to biofilm. In this study we found that the biofilm formed by Pseudomonas aeruginosa PAO1 was inhibited by exposure to a combination of F-53B and Cr(VI). The combined pollution damaged the cell membranes and the structure of the biofilm, and inhibited the production of the Pseudomonas quinolone-based signal, which affected biofilm formation. Moreover, the secretion of extracellular polymeric substances decreased as a result of this combined exposure. Exposure to F-53B and Cr(VI) individually or in combination could induce the excessive accumulation of intracellular reactive oxygen species (ROS), and the ROS positive rate of the bacteria increased under the treatment with 0.2 mmol/L of Cr(VI) and 250 nmol/L of F-53B, respectively. In addition, the activities of superoxide dismutase (SOD) and catalase (CAT) were enhanced for scavenging ROS in the bacteria that were exposed to Cr(VI) and F-53B. As an antioxidant, rutin was used to repair the toxicity of Cr(VI) and F-53B towards the biofilm formed by the bacteria. When rutin was added to the bacteria medium, with either Cr(VI) or F-53B as pollutant, or with the combined pollutants, the extracellular protein content of the bacteria recovered to 0.84, 0.94, and 0.85 times that of the control, respectively. Meanwhile, the accumulation of ROS and the activities of SOD and CAT decreased, which indicated that the addition of rutin can alleviate the oxidative stress and promote the antioxidant stress system.
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PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2023
·
IF 8.4
Zhijia Liao,Zhenyu Yuan,Hongliang Gao,Fanli Meng
In response to the pressing demand for acetic anhydride gas detection, this study introduces a novel gas sensor for precisely detecting acetic anhydride concentrations. The optimum conditions for the synthesis of cobalt hydroxyfluoride/cobalt oxide (CHFCO) heterojunctions with good acetic anhydride gas sensitivity were determined by carefully adjusting the calcination time, hydrothermal time and ammonium fluoride content. The best performing composite CHFCO sensor with porous rod particles was tested at 180 ℃ and achieved a response rate of 260 for 100 ppm acetic anhydride gas, with response and recovery times of 60 and 40 s, respectively. In comparison to other prepared sensors, the detection response for acetic anhydride was improved by a factor of 4.30–23.63. Moreover, the CHFCO sensor reliably detected acetic anhydride at a concentration of 500 ppb, exhibiting a response value of 1.56. Notably, the sensor demonstrated great selectivity, moisture resistance , and stability. The findings highlight the significant enhancements in gas-sensitive performance to acetic anhydride achieved by the abundant hydroxyl bonds on the surface of CHFCO heterojunction, the presence of fluorine ions , and the modulation of the band gap. These results provide valuable insights for the advancement of acetic anhydride gas sensors based on CHFCO heterojunction.
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高影响因子
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