CHEMISTRY-A EUROPEAN JOURNAL
·
2022
·Vol. 28
·期 61
·e202202063
·
IF 5.02
Wenfeng Zhou,Wenlong Liu,Sheng-Ping Guo
Graphical A new AgGaS 2 -type sulfide (Na 0.74 Ag 1.26 )BaSnS 4 with compressed chalcopyrite-like structure was obtained. It exhibits balanced NLO properties, including moderate SHG response, wide band gap, and high LIDT. The development of high-power solid-state lasers is in urgent need of infrared (IR) nonlinear optical (NLO) materials with wide band gaps and high laser-induced damage thresholds (LIDTs). Herein, a new compressed chalcopyrite-like IR NLO crystal (Na 0.74 Ag 1.26 )BaSnS 4 was successfully synthesized using a facile high-temperature solid-state method. Its structure can be considered as a variant of chalcopyrite AgGaS 2 (AGS)-type ones. It features a three-dimensional framework constructed by corner-sharing {[(Na/Ag)S 4 ] 7− } ∞ layers and isolated SnS 4 tetrahedra with negative cavities occupied by counter ion Ba 2+ . (Na 0.74 Ag 1.26 )BaSnS 4 exhibits phase-matchable moderate SHG response (0.31 × AGS), wide band gap (3.70 eV), and high LIDT (6.44 × AGS). Theoretical calculations reveal that the NLO response of (Na 0.74 Ag 1.26 )BaSnS 4 is mainly originated from the synergetic effects of AgS 4 and SnS 4 tetrahedra, and the inclusion of alkaline and alkaline earth metals is responsible for the wide band gap and high LIDT. Moreover, the discovery of this chalcopyrite-like compound will provide a feasible design strategy for the exploration of new promising IR NLO materials.
研究领域:
材料科学
·
晶体学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Guiting Chen,Gaoheng Qian,Shuwang Yi,Zhicai He,Hong-Bin Wu,Wei Yang,Bin Zhang,Yong Cao
The development of effectively universal interfacial materials for both conventional and inverted polymer solar cells (PSCs) plays a very crucial role in achieving highly photovoltaic performance and feasible device engineering. In this study, two novel alcohol-soluble conjugated polymers (PBSON-P and PBSON-FEO) with bis(benzothiophene-S,S-dioxide)-fused aromatics (FBTO) as the core unit and amino as functional groups are synthesized. They are utilized as universal cathode interfacial layers for both conventional and inverted PSCs simultaneously. Ascribing to the enlarged conjugated planarity and higher electron affinity for an FBTO unit, both PBSON-P and PBSON-FEO exhibit versatile electron-transporting abilities. They show wide band gaps that are important for light absorption in inverted PSCs, at which point PBSON-P and PBSON-FEO are more progressive than some of the reported small band gap cathode interfacial materials. Importantly, PBSON-P and PBSON-FEO display deep highest occupied molecular orbital energy levels, which can block holes at the cathode and thus increase the fill factor. As a result, both conventional and inverted PSCs using PBSON-P and PBSON-FEO as cathode interlayers realize high photovoltaic performance. Therefore, this series of novel polymers are amphibious cathode interfacial materials for high-performance conventional and inverted PSCs.
研究领域:
材料科学
·
能源科学
✓ 已验证
DOI
高影响因子
Chemistry-An Asian Journal
·
2020
·Vol. 15
·期 21
·3487-3493
·
IF 4.056
Feifei Mao,Jiadi Liu,Jinyu Hu,Hua Wu
Graphical By substituting two Ag + cations of Ag 2 Zr(IO 3 ) 6 by one La 3+ and two F − , LaZr(IO 3 ) 5 F 2 is formed via a 2 Ag + →La 3+ +2F − chemical cosubstitution. The introduction of F − into LaZr(IO 3 ) 5 F 2 resulted in a large band gap of 4.13 eV. Both compounds are birefringent materials with birefringences of ▵0.064 @1064 nm and 0.082 @1064 nm, respectively. Two mixed-metal zirconium iodates were prepared and studied as a case of chemical cosubstitution. The structure of Ag 2 Zr(IO 3 ) 6 ( P 2 1 /c ) features 0D [Zr(IO 3 ) 6 ] 2− anion group and 1D [Ag(IO 3 ) 2 ] − anionic chain, with the [Zr(IO 3 ) 6 ] 2− anion groups interconnected by Ag + ions into 3D network; LaZr(IO 3 ) 5 F 2 ( P 2 1 /n ) features 0D [Zr(IO 3 ) 5 F 2 ] 3− anion group and 2D [La(IO 3 ) 5 ] 2− anionic layer, with the [Zr(IO 3 ) 5 F 2 ] 3− groups interlinked by La 3+ ions into 3D structure. Notably, LaZr(IO 3 ) 5 F 2 is the first zirconium iodate fluoride reported. Wide optical band gaps of 3.77 and 4.13 eV are given for Ag 2 Zr(IO 3 ) 6 and LaZr(IO 3 ) 5 F 2 , respectively. Theoretical calculations confirmed that the weak d – d transition of Zr 4+ in the band structure leads to a moderate band gap of Ag 2 Zr(IO 3 ) 6 , and the introduction of F − into the zirconium iodate compound results in a large band gap of LaZr(IO 3 ) 5 F 2 . Both of the compounds are birefringent materials with birefringences of 0.064 @1064 nm and 0.082 @1064 nm, respectively.
研究领域:
无机化学
·
材料科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2018
·
IF 5.667
Fan Zhang,Na Wu,Jian Zhu,Jing Zhao,Guo-jun Weng,Jian-jun Li,Jun-wu Zhao
In this work, a combined seed mediated and galvanic replacement strategy has been proposed to design and fabricate two unique nanostructures, including Au@AuAg yolk-shell nanostructures with tunable interior gap and Au multi-spiky nanostructures with tunable spike length. The interior gap of the Au@AuAg yolk-shell nanostructures can be controlled by varying either the amount of AgNO 3 in the first step or the amount of HAuCl 4 in the second step. The SERS activity of Au@AuAg yolk-shell nanostructures was found to increase with increase in the interior gap. Owing to the build-in electromagnetic hot spots induced by plasmonic coupling effect of the Au triangular nanoplate core and AuAg shell especially the intensive coupling between the three sharp tips of the core and the concave of the inner wall of the shell, Au@AuAg yolk-shell nanostructures exhibit significantly higher SERS enhancement compared to their original Au triangular nanoplates. The best enhancement has been achieved when the interior gap of Au@AuAg yolk-shell nanostructures is 10 nm with the enhancement factor of 3.2 × 10 6 for rhodamine 6G, making them promising candidates for SERS-based detection.
研究领域:
纳米材料科学
·
光学
·
化学
✓ 已验证
产品关联
DOI
高影响因子
Journal of Environmental Sciences
·
2019
·
IF 3.556
Hanlu Shi,Rui He,Lei Sun,Gang Cao,Xiangjuan Yuan,Dongsheng Xia
A series of functional organic–metal AgCl-decorated graphitic carbon nitride (AgCl-CN x ) composites were synthesized and applied for the degradation of oxalic acid (OA) under visible light. The highest photocatalytic activity was achieved with AgCl decoration ratio of 1.0 (denoted as AgCl-CN 1.0 ). The pseudo-first-order constant for OA degradation was 0.0722 min −1 with the mineralization efficiency of 90.80% after 60 min reaction in the photocatalytic process with AgCl-CN 1.0 . A variety of characterization techniques including Brunauer–Emmett–Teller, X-ray diffraction, scanning electron microscope , transmission electron microscopy , X-ray photoelectron spectroscopy, Fourier transform infrared spectra , ultraviolet–visible diffuse reflectance spectra, photoluminescence , and Mott–Schottky were utilized to elucidate the physicochemical, microstructure, and optical properties contributing to the improvement of the photocatalytic performance. The results showed that AgCl-CN 1.0 had an oblate flaky erythrocyte-like structure with a moderate band gap energy of ~ 3.00 eV. In addition, the effects of the key parameters (i.e., AgCl-CN 1.0 dosage, initial OA concentration, solution pH, and presence of natural organic matter) on OA degradation were systematically investigated. Radical scavenger experiments indicated that photogenerated holes, electrons, superoxide anion radicals, and hydroxyl radicals were the dominant reactive species. Moreover, AgCl-CN 1.0 exhibited excellent stability and reusability for OA degradation without detectable Ag + release in the solution over multiple reaction cycles. The efficient OA mineralization could be mainly ascribed to the moderate specific surface area, increased numbers of active sites, and effective interfacial charge transfer of AgCl-CN 1.0 . Overall, the AgCl-CN 1.0 composite was demonstrated to be a highly efficient, stable, and recoverable photocatalyst.
研究领域:
材料科学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2021
·
IF 4.098
Jian Zhu,Shuang Zhang,Guo-jun Weng,Jian-jun Li,Jun-wu Zhao
By using gold nanorods with silver coating as the sacrificial templates, we prepared spiky yolk-shell AuAg bimetallic nanorods with uniform interior gap via galvanic replacement reaction. The length and number of Au tips of the spiky yolk-shell AuAg nanorods can be tuned simultaneously by altering HAuCl 4 volume. The influence of HAuCl 4 volume and the sliver layer thickness on the SERS activity of spiky yolk-shell AuAg nanorods are studied. When the sliver layer is thin, the interior gap has not been shielded completely and the outer shell has obvious tips, thus the surface-enhanced Raman scattering (SERS) activity has the strongest enhancement with an enhancement factor (EF) of 4.9 × 10 5 . The spiky yolk-shell AuAg nanorods with the strongest SERS activity are used as SERS substrates to detect thiram. The results demonstrate that the SERS intensity increases linearly with the logarithmic concentration of thiram in the range of 10 −3 M to 10 −7 M. The detection limit is as low as 97 nM, which is lower than the maximum pesticide residue limit (29 µM) in fruits stipulated by the US Environmental Protection Agency (EPA). Therefore, the spiky yolk-shell AuAg bimetallic nanorods have important practical application value in pesticide detection.
研究领域:
材料科学
·
分析化学
·
环境科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
CELLULOSE
·
2022
·Vol. 30
·期 3
·1533-1542
·
IF 6.123
Lou Jiayu,Wang Meiyi,Liu Yang,Wang Huashan
T 1 –T 2 multi-modality submicron particles were widely used in clinic imaging, biochemical analysis and biosensor. Here, we prepared a new magnetic submicron particle through the spatial-gap of cellulose nanocrystal (CNC) dispersion as a template.The obtained submicron particles were ellipsoid and had a better magnetic response and relaxation effects. By varying the Fe(acac) 3 to Gd(acac) 3 ratio, it was possible to tune the surface morphology, crystal structure and T 1 –T 2 relaxation effect. More importantly, the pre-drying and burning process had influence on the polycrystalline growth process of Fe(acac) 3 and Gd(acac) 3 mixture, and the slow removal process for the CNC template could endow the compounds with different relaxation effects. By using the spatial-gap of the cellulose nanocrystal dispersion as a template makes it possible to fabricate T 1 –T 2 multi-modality crystalline submicron particles directly and is promising for preparing other CNC-templating based functional materials.
研究领域:
材料科学
·
医学影像
·
生物医学工程
✓ 已验证
产品关联
DOI
高影响因子
SENSORS AND ACTUATORS B-CHEMICAL
·
2025
·
IF 7.7
Zepeng Gu,Xiaoyao Wang,Qinyan Xu,Xianfeng Lin,Nuo Duan,Shijia Wu
Due to signal suppression caused by large interfering macromolecules such as proteins, reliable and label-free detection of antibiotics in milk remains a significant challenge. Here, a surface-enhanced Raman scattering (SERS) platform based on self-assembled molecular layers combined with deep learning was developed to selectively enrich and enhance representative antibiotics. A gold nanoparticle monolayer SERS substrate with an average gap of 2.5 nm was successfully fabricated, achieving a detection limit as low as 4.88×10 -10 M for 4-MBA. Notably, this technique effectively suppressed the Raman signals from macromolecules in milk while allowing antibiotic molecules to access the nanogap hotspot regions. The detection limits for penicillin and ciprofloxacin in milk were determined to be 8.4×10⁻ 9 M and 5.34×10 -9 M, respectively. Additionally, to address the issue of spectral overlap caused by the simultaneous presence of multiple antibiotics, which traditional chemometric methods cannot resolve for accurate quantification, a novel deep learning model, RamEfficientNet, was developed. Unlike conventional single-peak approaches, this model analyzes the entire spectral range through CBAM attention mechanisms, enabling extraction and decomposition of individual antibiotic spectra from complex mixtures for precise quantification. The model successfully achieved rapid classification of Raman spectra for various concentrations and types of antibiotics, with a classification accuracy exceeding 95%. Furthermore, by combining this model with an MLP, an innovative artificial intelligence visualization of the spectral regression process was realized, with an R² value exceeding 0.99. In conclusion, the combination of gold nanoparticle gaps and artificial intelligence provides a solution for the simultaneous quantitative analysis of antibiotics.
研究领域:
分析化学
·
纳米技术
·
食品安全
·
人工智能
·
光谱学
✓ 已验证
产品关联
DOI
高影响因子
Advanced Science
·
2025
·
IF 14.1
Qiangfei Su,Jian Wang,Yu Song,Zhaowenbin Zhang,Bo Cai,Xiakeerzhati Xiaohalati,Jingwei Liu,Haozhe Li,Zheng Wang,Jiang Chang,Lin Wang
Schwann cells are pivotal in generating a pro-regenerative microenvironment for long-gap peripheral nerve injury (PNI) repair via their orchestrated behaviors, including cell migration, proliferation, and secretion. Bioceramics can release bioactive ions to regulate “repair” cells for regenerating damaged tissues. Herein, bioceramic akermanite (AT) is screened and found to significantly enhance Schwann cell proliferation, migration, and secretion by activating the PI3K/AKT and MAPK/ERK signaling pathways. Integration with silk sericin (SS), a natural biomaterial possessing excellent bioactivity, promotes the release of Ca and Mg from AT, synergistically enhancing Schwann cell pro-regenerative behaviors and accelerating axon elongation. The AT-SS composite conduit effectively restores nerve structure and function in a 13 mm transected PNI. Compared with commercial eton conduit, AT-SS conduit promotes axons and myelin sheaths regeneration, improves nerve conduction, and effectively alleviates gastrocnemius muscle atrophy. The AT-SS conduit achieves autograft-comparable behavioral recovery as evidenced by the paw withdrawal latency, hind limb grip force, and sciatic function index. The excellent degradation and biosafety of AT-SS conduit indicate its potential for clinical translation. This study introduces an ion-based therapeutic approach for enhancing the pro-regenerative functions of Schwann cells, and provides novel insights and strategies for clinically managing long-gap PNI and other nerve tissue injuries.
研究领域:
生物材料
·
神经再生
·
组织工程
·
生物医学工程
·
细胞信号传导
·
神经科学
✓ 已验证
产品关联
DOI
PubMed
高影响因子
ADVANCED FUNCTIONAL MATERIALS
·
2024
·
IF 18.5
Shiwei Yu,Houliang Sun,Zaka Ullah,Ledi Chen,Xiaowei An,Mingliang Chen,Shoupu Zhu,Liwei Liu,Qi Li
High-performance optoelectronic bifunctional cathode materials may simultaneously seize and store solar energy in lithium-ion batteries to boost their storage capacity. However, such photoactive cathodes with typical intrinsic features are generally limited for UV light applications and offer poor sunlight harvesting which results in lower energy density. Here, the assembly of two oligomers, poly(vat blue 6) (PVB6) and poly(vat blue 6 sulfide) (PVB6S) is reported, through polymerization to extend the conjugated structure of organic optoelectronic small molecules. These oligomers are effectively employed as photo-assisted bifunctional cathodes for lithium-ion batteries. The extended conjugated structure narrows the energy gap, promoting exciton dissociation and expanding the light absorption region. PVB6S possesses a narrow energy gap of 1.565 eV, and the discharge-specific capacity of the battery with PVB6S is enhanced from 203 to 411 mAh g −1 under light illumination, which is approximately twice the original capacity. This demonstrates the extended conjugated structure and charge separation in a cell, which synergistically contributes to the rational design of photo-assisted bifunctional cathode materials and complementary enhances the performance of lithium-ion batteries.
研究领域:
材料科学
·
电化学
·
光电学
·
能源存储
✓ 已验证
DOI
高影响因子
Nano Today
·
2025
·
IF 10.9
Yong Jiang,Zhong Liang,Hao Fu,Guangtong Hai,Yaping Du
Rare earth oxides (REOs) hold a pivotal position in enhancing electrocatalytic performance, yet the comprehension of their underlying mechanisms poses significant challenges. In this study, REOs loaded with a ternary alloy, abundant in oxygen vacancies, were synthesized through a one-pot reduction method and exhibited remarkable oxygen evolution reaction (OER) activity. The interaction at the interface between Fe 0.3 NiCo and CeO 2 induced substantial lattice distortion and modulated the oxygen vacancy concentration within the REOs. A unique electron transport channel, incorporating transition metal (3d) -oxygen vacancy (Vo) -rare earth (4 f) elements, was constructed at the interface, significantly boosting the OER activity of NiCo-CeO 2 . Notably, a current density of 10 mA cm −2 was achieved at a low overpotential of 151 mV. Comprehensive characterizations revealed that the interplay between the alloy and REOs regulated the oxygen vacancy concentration of the latter. In-situ attenuated total reflection infrared spectroscopy (ATR-IR) further confirmed that REOs facilitated the adsorption of O 2 /-OH, thereby enhancing OER activity. Theoretical calculations also indicated that oxygen vacancies effectively shifted the d and f band centers near the Fermi level, promoting d-f electron exchange and ensuring efficient electron transfer. This study offers a novel perspective for the development of efficient RE-based catalysts.
研究领域:
材料科学
·
电化学
✓ 已验证
产品关联
DOI
高影响因子
MOLECULES
·
2024
·Vol. 29
·期 5
·1182
·
IF 4.2
Yunqing Zhu,Kaiyue Wen,Bingqing Li,Yirong Hao,Jianjun Zhou
In this study, the performance of a zero-gap flow-through reactor with three-dimensional (3D) porous Ti/RuO2-TiO2@Pt anodes was systematically investigated for the electrocatalytic oxidation of phenolic wastewater, considering phenol and 4-nitrophenol (4-NP) as the target pollutants. The optimum parameters for the electrochemical oxidation of phenol and 4-NP were examined. For phenol degradation, at an initial concentration of 50 mg/L, initial pH of 7, NaCl concentration of 10.0 g/L, current density of 10 mA/cm2, and retention time of 30 min, the degradation efficiency achieved was 95.05%, with an energy consumption of 15.39 kWh/kg; meanwhile, for 4-NP, the degradation efficiency was 98.42% and energy consumption was 19.21 kWh/kg (at an initial concentration of 40 mg/L, initial pH of 3, NaCl concentration of 10.0 g/L, current density of 10 mA/cm2, and retention time of 30 min). The electrocatalytic oxidation of phenol and 4-NP conformed to the pseudo-first-order kinetics model, and thekvalues were 0.2562 min−1and 0.1736 min−1, respectively, which are 1.7 and 3.6-times higher than those of a conventional electrolyzer. Liquid chromatography–mass spectrometry (LC–MS) was used to verify the intermediates formed during the degradation of phenol or 4-NP and a possible degradation pathway was provided. The extremely narrow electrode distance and the flow-through configuration of the zero-gap flow-through reactor were thought to be essential for its lower energy consumption and higher mass transfer efficiency. The zero-gap flow-through reactor with a novel 3D porous Ti/RuO2-TiO2@Pt electrode is a superior alternative for the treatment of industrial wastewater.
研究领域:
环境科学
·
电化学工程
✓ 已验证
产品关联
DOI
PubMed
高影响因子
危险品化学品经营许可证（带存储）