Advanced Science
·
2025
·
IF 14.1
Yueyang He,Jinyan Lin,Jingwen Bai,Xiao Shen,Kangliang Lou,Yuanyuan Zhu,Zishan Qiao,Weiling Chen,Yang Li,Xiaolong Liu,Guojun Zhang
Breast-conserving surgery (BCS) has become the standard care for early-stage breast cancer. The accurate assessment of tumor margins is urgently required for BCS because positive resection margins often lead to local recurrence. To address this clinical dilemma, a Hf(IV)-coordinated NIR-II fluorescence “turn-on” nanoprobe based on the clinically approved NIR-II fluorescent dye indocyanine green (ICG) for intraoperative tumor visualization is developed. Notably, the fluorescence of ICG can be efficiently quenched by Hf(IV) and subsequently recovered in vivo, showing a remarkable fluorescence “quenching-recovery-amplification” capacity. This nanoprobe can effectively accumulate in tumor sites, accurately identifying submillimeter-sized primary and residual tumors with high sensitivity. In addition, subcutaneous, muscle-infiltrating, and orthotopic breast cancer models are built to repeatedly prove that this ultrasensitive nanoprobe is feasible for precise imaging-guided surgery in breast cancer. Overall, this study constructs an activatable fluorescent nanoprobe for real-time intraoperative tumor margin visualization, holding promise for complete surgical resection and reduction of local recurrence.
研究领域:
肿瘤学
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生物医学工程
·
分子影像学
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产品关联
DOI
PubMed
高影响因子
IONICS
·
2018
·Vol. 25
·期 2
·727-735
·
IF 2.347
Feng Aihu,Yu Yang,Mi Le,Yu Yun,Song Lixin
In this work, the MXene Ti 3 C 2 with excellent electrical conductivity is obtained by etching Ti 3 AlC 2 with NH 4 HF 2 solution. The electrosorption performance, the electrochemical and physicochemical properties of as-prepared Ti 3 C 2 are characterized. The results demonstrate that NH 4 HF 2 -etched Ti 3 C 2 possesses the better intercalation pseudo-capacity and the specific capacitance is up to 78 F∙g −1 , which is an increase of 34% than HF-etched Ti 3 C 2 . In addition, the desalination capacity of NH 4 HF 2 -etched Ti 3 C 2 enhances 35.5% than that of HF-etched Ti 3 C 2 . When the initial conductivity of NaCl is ~ 1000 μS/cm, the desalination capacity of NH 4 HF 2 -etched Ti 2 C 3 electrode is 12.1 mg∙g −1 , and the pseudo-first-order model can well describe the electrosorption kinetics of NH 4 HF 2 -etched Ti 3 C 2 electrode. Furthermore, the regeneration performance of the NH 4 HF 2 -etched Ti 3 C 2 electrode is excellent. This study indicates a new kind of effective electrode material to improve the desalination performance of capacitive deionization (CDI) technology.
研究领域:
材料科学
·
环境工程
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产品关联
DOI
高影响因子
Molecular Catalysis
·
2019
·
IF 2.938
Wenke Li,Zhe Cai,Hang Li,Yu Shen,Yongqiang Zhu,Haichao Li,Xubin Zhang,Fumin Wang
One-pot conversion of furfural to the target product γ-valerolactone (GVL) is a challenging and meaningful part of biomass exploitation. Development of heterogeneous catalysts with both Brønsted and Lewis acid properties has proved to be promising and useful because they offer an efficient way to tandem cascade reactions from furfural to GVL. Herein, we successfully synthesized sulfated DUT-67(Hf), a novel bifunctional catalyst, via a post-synthetic modification method. The prepared sulfated DUT-67(Hf) was characterized by XRD, SEM, TEM, N 2 adsorption-desorption, Elemental (N, C, H, S) analyses, situ infrared spectra of pyridine adsorptions, XPS, FT-IR, TG, and NH 3 -TPD. The acidity of the catalysts could be adjusted by submersion in different concentrations of aqueous sulfuric acid, giving 0.01 mol/L sulfuric acid for 0.42 mmol/g acidity to 0.1 mol/L sulfuric acid for 2.16 mmol/g acidity. Sulfated DUT-67(Hf) possessed by 0.06 mol/L aqueous sulfuric acid exhibited optimal catalytic activity and showed an 87.1% yield of GVL under the conditions of 180 °C after 24 h of reaction. Moreover, the mechanism of introducing Brønsted acid sites into DUT-67(Hf) and the better hydrogen donors was also investigated through contrasting experiments.
研究领域:
化学工程
·
催化化学
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DOI
高影响因子
CERAMICS INTERNATIONAL
·
2025
·
IF 5.6
Yinghao Zhu,Yumei Tan,Kao Pei,Denghui Jiang,Linzhuang Xing,Hongyu Yang,Bolei Cai,Liang Kong,Zhimin Li
The BiFeO 3 –BaTiO 3 piezoelectric ceramic possesses high Curie temperature, rendering it a promising candidate material for high-temperature piezoelectric actuators, yet the low strain and undesired temperature stability have to be resolved. In this study, the piezoelectric system 0.95(0.7BiFeO 3 –0.3BaTiO 3 )–0.05(Ba 0.6 Sr 0.4 )TiO 3 (BF–BT–BST) was probed with Hf modification. Results demonstrate that the introduction of Hf 4+ ions promotes the phase transition from the rhombohedral to the pseudocubic, leading to the formation of polar nanoregions (PNRs). With increasing Hf 4+ level, the freezing temperature gradually decreases from 297 °C to 31 °C, and Hf modification activates the activity of PNRs at room temperature, creating a more responsive relaxation state of PNRs to external electric fields. Consequently, the modification increases the strain up to 0.45 % and results in a good temperature stability of 17 % from 25 °C to 200 °C for the sample with 0.75 % Hf. The findings present an effective strategy for improving the strain and temperature stability in BF–BT–based piezoelectric ceramics.
研究领域:
材料科学
·
物理学
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产品关联
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2023
·
IF 9.5
Yue Lei,Xin Xu,Junying Yin,Sen Jiang,Kang Xi,Lai Wei,Yunfang Gao
Li-metal batteries (LMBs), especially in combination with high-energy-density Ni-rich materials, exhibit great potential for next-generation rechargeable Li batteries. Nevertheless, poor cathode–/anode–electrolyte interfaces (CEI/SEI) and hydrofluoric acid (HF) attack pose a threat to the electrochemical and safety performances of LMBs due to aggressive chemical and electrochemical reactivities of high-Ni materials, metallic Li, and carbonate-based electrolytes with the LiPF6 salt. Herein, the carbonate electrolyte based on LiPF6 is formulated by a multifunctional electrolyte additive pentafluorophenyl trifluoroacetate (PFTF) to adapt the Li/LiNi0.8Co0.1Mn0.1O2 (NCM811) battery. It is theoretically illustrated and experimentally revealed that HF elimination and the LiF-rich CEI/SEI films are successfully achieved via the chemical and electrochemical reactions of the PFTF additive. Significantly, the LiF-rich SEI film with high electrochemical kinetics facilitates Li homogeneous deposition and prevents dendritic Li from forming and growing. Benefiting from the collaborative protection of PFTF on the interfacial modification and HF capture, the capacity ratio of the Li/NCM811 battery is boosted by 22.4%, and the cycling stability of the symmetrical Li cell is expanded over 500 h. This provided strategy is conducive to the achievement of high-performance LMBs with Ni-rich materials by optimizing the electrolyte formula.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
JOURNAL OF MOLECULAR STRUCTURE
·
2022
·
IF 3.841
Wei Qin,Xue Han,Junwei Wang,Xie Wang,Jianli Zhang
To design some excellent extractants for the separation of Zr(Ⅳ) and Hf(Ⅳ), a novel set of polyamidoamine dendrimers peripherally modified with salicylaldehyde (Abbreviated as PAMAM-SA) have been synthesized. UV-vis absorption and fluorescent spectrometry were used to study the selectivity of G.1.0, G2.0, G3.0 and G4.0 PAMAM-SA on Zr(Ⅳ) and Hf(Ⅳ) compared with other metal ions, and their extraction/separation performance on Zr(Ⅳ) and Hf(Ⅳ) was also investigated under different pH solutions. The results show that these dendrimers have superior selectivity on Zr(Ⅳ) and Hf(Ⅳ) as compared with Ca 2+ , Mg 2+ , Fe 3+ and Ni 2+ ions. The binding stoichiometry of G1.0, G2.0, G3.0 and G4.0 PAMAM-SA dendrimers with Zr(Ⅳ) is 1:4, 1:8, 1:10, 1:16 molar ratio determined by fluorescent titration respectively and the molar ratio of these dendrimers with hafnium is similar to that of zirconium. Both of the maximum extraction efficiency (EE%) on Zr(Ⅳ) and the separation coefficient (β Zr/Hf ) are following the order of G2.0-PAMAM-SA > G1.0-PAMAM-SA > G3.0-PAMAM-SA > G4.0-PAMAM-SA, and the maximum EE% on Zr(Ⅳ) is up to 98.9% and furthermore the β Zr/Hf is 1.52 for G2.0-PAMAM-SA at lower acid concentration compared with the reported extractants. The favorable higher EE% and β Zr/Hf indicate that G2.0-PAMAM-SA may be potentially employed as a highly selective and efficient extractant to enhance separating zirconium from hafnium.
研究领域:
化学
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材料科学
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产品关联
DOI
高影响因子
MOLECULES
·
2022
·Vol. 27
·期 21
·7486
·
IF 4.927
Xiuxia Zuo,Qinghua Yang,Yaolong He,Ya-Jun Cheng,Shanshan Yin,Jin Zhu,Peter Müller-Buschbaum,Yonggao Xia
Porous silicon-based anode materials have gained much interest because the porous structure can effectively accommodate volume changes and release mechanical stress, leading to improved cycling performance. Magnesiothermic reduction has emerged as an effective way to convert silica into porous silicon with a good electrochemical performance. However, corrosive HF etching is normally a mandatory step to improve the electrochemical performance of the as-synthesized silicon, which significantly increases the safety risk. This has become one of the major issues that impedes practical application of the magnesiothermic reduction synthesis of the porous silicon anode. Here, a facile HF-free method is reported to synthesize macro-/mesoporous silicon with good cyclic and rate performance by simply increasing the reduction temperature from 700 °C to 800 °C and 900 °C. The mechanism for the structure change resulting from the increased temperature is elaborated. A finite element simulation indicated that the 3D continuous structure formed by the magnesiothermic reduction at 800 °C and 900 °C could undertake the mechanical stress effectively and was responsible for an improved cyclic stability compared to the silicon synthesized at 700 °C.
研究领域:
材料科学
·
电化学
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DOI
高影响因子
INTERNATIONAL JOURNAL OF BIOLOGICAL MACROMOLECULES
·
2022
·
IF 8.025
Xinyi Xing,Xian Shi,Rui Hu,Ying Guan,Hui Gao,Siquan Xu
In this work, a series of (x)Hf-β zeolite catalysts were prepared by a simple wet impregnation method and used as bifunctional catalysts with Lewis and Brønsted acid sites for synthesizing 5-hydroxymethylfurfural (5-HMF) from cellulose in H 2 O (NaCl) -THF biphasic system. Characterization analysis of (x)Hf-β zeolite catalysts with ICP-OES, N 2 adsorption-desorption isotherm, XRD, FTIR , SEM, NH 3 -TPD and Py-FTIR indicated that the catalysts possessed favorable pore structure, appropriate acid strength and acidity. A superior 86.3 % cellulose conversion and 53.4 % 5-HMF yield could be obtained at 200 °C for 4 h by using (5 %)Hf-β zeolite as the catalyst. In addition, the catalytic system provided a favorable 5-HMF yield from other carbohydrates, including glucose (85.1 %), sucrose (80.6 %), starch (65.1 %), maltose (65.0 %), dextran (59.9 %), and Moso bamboo (21.9 %). Nevertheless, the recyclability of (5 %)Hf-β zeolite catalyst was unsatisfactory and the 5-HMF yield showed a downtrend from 53.4 % to 24.4 % after 5 cycles. The catalyst has promising potential for converting biomass materials into high-value platform compounds.
研究领域:
化学工程
·
催化科学
·
生物质转化
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产品关联
DOI
PubMed
高影响因子
APPLIED SURFACE SCIENCE
·
2023
·
IF 6.7
Jing Wang,Yakun Teng,Shushu Jia,Wenyan Li,Tianyi Yang,Ya Cheng,Hao Zhang,Xiang Li,Lijuan Li,Ce Wang
The successful development of a cost-effective and efficient adsorbent is crucial for the optimal treatment of pharmaceutical sewage. In this study, a UiO-66(Hf)–NH 2 nanocrystal modified composite nanofiber membrane (HfPNFM) was synthesized through electrospinning and solvothermal techniques, for the removal of salicylic acid (SA). The in-situ growth of UiO-66(Hf)–NH 2 on the nanofibers led to a significant increase in the specific surface area of the composite nanofiber membrane. Furthermore, HfPNFM demonstrated exceptional flexibility and reusability, with the removal efficiency of SA still at 96.85 % even after ten cycles. The adsorption process of SA onto HfPNFM was well described by the pseudo-second-order kinetic model and Langmuir isotherm model, with a maximum adsorption capacity of 128.21 mg/g. In dynamic adsorption experiments, HfPNFM effectively removed 100 % of SA at a concentration of 50 mg/L. The chemical oxygen demand (COD) concentration of SA was reduced from 165.89 mg/L to 41.47 mg/L by two layers of HfPNFM filtration, below the standard for pharmaceutical wastewater discharge (GB: 21904-2008). X-ray photoelectron spectroscopy (XPS) revealed that electrostatic interactions, π-π interactions, hydrogen bond interactions, and metal complexation interactions between SA and HfPNFM were responsible for the adsorption. This highly effective composite nanofiber membrane has promising potential for pharmaceutical wastewater treatment.
研究领域:
环境科学
·
材料科学
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产品关联
DOI
高影响因子
CERAMICS INTERNATIONAL
·
2024
·
IF 5.1
Yang Liu,Jia-Ji Liang,Wei-Ming Guo,Chao Chang,Xiao-Ming Duan,De-Chang Jia,Hua-Tay Lin
High-temperature thermal stability plays a crucial role in the structural application of pressureless liquid-phase sintered SiC (PLS-SiC) ceramics. In this paper, a PLS-SiC ceramic processed with CeO 2 –Al 2 O 3 as sintering additives with excellent high-temperature thermal stability was achieved by incorporating (Hf, Zr, Ta, Nb, Ti)B 2 (HEB) particles. Results showed that PLS-SiC ceramics with HEB-free underwent a structural change from dense to porous microstructure after annealing at 1800 °C/1 h. Conversely, PLS-SiC ceramics with the addition of 10 vol% HEB exhibited excellent thermal stability, as evidenced by the retention of their dense microstructure after exposure to annealing at 1800 °C/1 h. The possible primary reasons for this significantly different response to the thermal stability could be probably attributed to fact that HEB reacted with CeAlO 3 and SiC to form solid-phase products, subsequently inhibiting the formation of gas-phase products after decomposition of CeAlO 3 alone in a high-temperature vacuum environment. In addition, the formation of a compact protective outer layer containing Hf–Ta containing diboride in PLS-SiC ceramics during the annealing process could effectively hinder the volatilization of volatile substances at a high temperature.
研究领域:
材料科学
·
陶瓷工程
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产品关联
DOI
高影响因子
Analytical Methods
·
2018
·Vol. 10
·期 17
·1993-1998
·
IF 2.073
Wei Du,Chunman Jia,Yinfeng Zhang,Qing Chen,Yile Wang,Yan Huang,Qi Zhang
A method that uses a Sc–3-HF complex as a fluorescent chemosensor for the detection of dihydrogen phosphate ions has been developed. The Sc–3-HF complex exhibits excellent selectivity and sensitivity towards dihydrogen phosphate ions. The binding properties of the Sc–3-HF complex towards various anions are evaluated by fluorescence spectroscopic method. The results demonstrate that the Sc–3-HF complex can effectively distinguish H2PO4− from HSO4−, HPO42− and PO43−. These results of fluorescence reversibility experiments show that the Sc–3-HF complex can serve as a relay probe to detect dihydrogen phosphate ions with high selectivity and sensitivity in CH3CN–H2O (1 : 4, v/v) solution.
研究领域:
分析化学
·
生物化学
✓ 已验证
产品关联
DOI
高影响因子
FUEL
·
2021
·
IF 6.609
Rulu Huang,Yao Liu,Junhua Zhang,Junnan Wei,Lincai Peng,Xing Tang
Both value-added utilization of agricultural waste to prepare catalytic materials and selective conversion of biomass-based carbonyl compounds are hot topics. Herein, sugarcane bagasse ( SB ), a main by-product of cane sugar manufacturing industry, was directly assembled with HfCl 4 and methanesulfonic acid (MSA) via a one-step hydrothermal method for scalable preparation of Hf-containing coordination complex (Hf@ SB -MSA). Characterization results revealed that the coordination between Hf 4+ and phenolic hydroxyl, alcohol hydroxyl, carboxyl groups in SB resulting in the formation of Lewis acid (LA) and Lewis base (LB) sites, while sulfonic group in MSA providing Brønsted acid (BA) sites. The cooperative role of LA, BA and LB in Hf@ SB -MSA delivered prominent catalytic performance for catalytic transfer hydrogenation (CTH) of levulinic acid (LvA) to γ-valerolactone (GVL) with isopropanol as solvent and H-donor at mild reaction conditions (GVL yield was up to 99.1%). Heterogeneity and recycling experiments further revealed the good recyclability of Hf@ SB -MSA, which can be easily separated from the reaction mixture by filtration and repetitively used at least five reaction runs without an obvious loss of activity. More gratifyingly, Hf@ SB -MSA also displayed superior universality for the CTH of various carbonyl compounds to their corresponding alcohols with yields up to 90%.
研究领域:
催化化学
·
生物质能
·
材料科学
✓ 已验证
产品关联
DOI
高影响因子
危险品化学品经营许可证（带存储）