SPECTROCHIMICA ACTA PART A-MOLECULAR AND BIOMOLECULAR SPECTROSCOPY
·
2024
·
IF 4.3
Yifan Cui,Qiulan Li,Dezhi Yang,Yaling Yang
Peroxidase (POD)-mimicking nanozymes have got great progress in the sensing field, but most nanozyme assaying systems are built with a single-signal output mode, which is vulnerable to the effect of different factors. Thus, establishment of a dual-signal output mode is necessary for acquiring dependable and durable performance. This work described an Fe doped noradrenaline-based carbon dots and Prussian blue (Fe,NA-CDs/PB) nanocomposite as a POD-like nanozyme and modified gold nanoparticles (AuNPs) for the colorimetric and surface-enhanced Raman scattering (SERS) dual-mode sensor of Pb(II) in traditional Chinese medicine samples. With 2,2′-azino-bis-(3-ethylbenzothiazoline-6-sulphonic acid) (ABTS) and 3,3′,5,5′-tetramethylbenzidine (TMB) as the substrates, it was found that the addition of Pb(II) inhibited the POD-like activity of Fe,NA-CDs/PB and AuNPs, so it was used for colorimetric and SERS dual-mode assays. The POD-like activity was shown to be a “ping-pong” catalytic mechanism, whereas the addition of Pb(II) produced noncompetitive inhibition with modulatory effects on Fe,NA-CDs/PB. The linear response range for colorimetric and SERS sensor detection of Pb(II) was 0.01–1.00 mg/L with the detection limit of 5 μg/L and 8 μg/L, respectively. This dual-mode detection system shows excellent selectivity. More importantly, the Pb(II) in traditional Chinese medicine samples have successfully assayed with good recovery from 90.4 to 108.9 %.
研究领域:
分析化学
·
纳米技术
·
环境科学
·
传统中药
✓ 已验证
DOI
高影响因子
Journal of Materials Chemistry A
·
2026
·
IF 9.5
Rong Jiang,Junyuan Huang,Ruixue Ma,Qian Li,Longjun Dai,Runyu Li,Xingpeng Chen,Yang Ren,Zhu Liu,Xu Chen,Xiaowei Zhou
Antimony trisulfide (Sb2S3) is a highly promising anode material for alkali-metal batteries due to its high theoretical capacity and abundant resources. However, severe volume expansion during charge-discharge and low electrical conductivity restrict its electrochemical performance. In this study, Sb2S3@NC core-shell nanorod with hollow feature (H-Sb2S3@NC) was successfully prepared via high-temperature carbonization and secondary sulfidation of the inorganic-organic Sb2S3@PDA composite precursor. It would induce the volatilization of partial Sb2S3 by controlling temperature during carbonization, concurrently forming the inorganic core-shell nanorod structure and its hollow feature. Compared to Sb2S3@NC without hollow feature, H-Sb2S3@NC exhibits superior cycling and rate performance when as anode for sodium-ion (SIBs) and potassium-ion batteries (PIBs). Specifically, as anode for SIBs, H-Sb2S3@NC retains 517.0 mAh g⁻¹ after 100 cycles at 100 mA g⁻¹ and even delivers 535.5 mAh g⁻¹ at 1000 mA g⁻¹ (Sb2S3@NC: 60.6 mAh g⁻¹ after 100 cycles at 100 mA g⁻¹, 39.7 mAh g⁻¹ at 1000 mA g⁻¹). For PIBs, H-Sb2S3@NC provides 431.1 mAh g⁻¹ after 50 cycles at 100 mA g⁻¹ (Sb2S3@NC: 208.3 mAh g⁻¹ under the same conditions). Ex situ characterizations confirm Sb2S3 undergoes a reversible conversion-alloying reaction during Na⁺/K⁺ storage. The internal voids of H-Sb2S3@NC could effectively buffer volume expansion stress, while N-doping in the NC (nitrogen-doped carbon) layer enhances ion/electron transport. These two factors synergistically ensure electrode structural stability and excellent kinetics. The temperature-controlled microstructure regulation strategy proposed in this study provides an effective approach to addressing the volume expansion problem of Sb2S3-based anodes and optimizing the electrode performance of alkali-metal ion batteries.
✓ 已验证
产品关联
DOI
高影响因子
JOURNAL OF RARE EARTHS
·
2024
·Vol. 43
·期 3
·543-551
·
IF 5.2
Lang Ruan,Zeyun Zhou,Yi Hu,Ruifeng Peng,Xiaoyan Chen,Ming Cheng,Zhi Zhou,Mao Xia
The technology of solid-state lighting has developed for decades in various industries. Phosphor, as an element part, determines the application domain of lighting products. For instance, blue and red-emitting phosphors are required in the process of plant supplementing light, arrow-band emitting phosphors are applied to backlight displays, etc. In this work, a Bi 3+ -activated blue phosphor was obtained in a symmetrical and compact crystal structure of Gd3SbO7 (GSO). Then, the co-doping strategy of alkali metal ions (Li + , Na + , and K + ) was used to optimize the performance. The result shows that the photoluminescence intensity is increased by 2.1 times and 1.3 times respectively by introducing Li + and K + ions. Not only that, it also achieves narrow-band emitting with the full width of half-maximum (FWHM) reaching 42 nm through Na + doping, and its excitation peak position also shifts from 322 to 375 nm, which can be well excited by near-ultraviolet (NUV) light emitting diode (LED) chips (365 nm). Meanwhile, the electroluminescence spectrum of GSO:0.6 mol%Bi 3+ ,3 wt%Na + matches up to 93.39% of the blue part of the absorption spectrum of chlorophyll a . In summary, the Bi 3+ -activated blue phosphor reported in this work can synchronously meet the requirements of plant light replenishment and field emission displays .
研究领域:
材料科学
·
光学工程
·
固体照明
·
光电子学
·
农业光生物学
✓ 已验证
DOI
高影响因子
ACS Applied Materials & Interfaces
·
2019
·
IF 8.456
Jie Qu,Dong Wang,Zu-guang Yang,Zhen-guo Wu,Lang Qiu,Xiao-dong Guo,Jun-tao Li,Ben-he Zhong,Xian-chun Chen,Shi-xue Dou
Composite cathodes have attracted great attention due to the integrated advantages of each pure structure. Also, the component ratio deserves a careful modulation to further improve the corresponding electrochemical performance. Mn-based layer–tunnel hybrid composite became a focus in sodium-ion batteries due to the superiority in terms of high performance, low cost, and nontoxicity. In the previous reports, the structure modulation was carried out via changing the synthesis condition, varying the transition-metal-element ratio, and different ion doping. Also, it is still challenging to explore a more feasible method to simplify the adjustment process. Herein, we introduced Mg2+ into Na sites or transition-metal sites in Na0.6MnO2 and first discovered the doping-site-variation-induced structural adjustment phenomenon. Specifically, Mg doping in transition-metal sites could be beneficial for the growth of the P2-type structure, while layer/tunnel component ratio decreased when locating Mg2+ in Na sites. The P2–O2 phase transformations could be effectively suppressed by locating Mg2+ in both sites in high-voltage regions and thus improve the cycling performance. The designed material, Na0.6Mn0.99Mg0.01O2, could attain a decent capacity of 100 mA h g–1 at 1000 mA g–1 and a satisfied retention of 76.6% after 500 cycles. Additionally, ex situ X-ray diffraction analysis experiments verify the excellent structural stability of Mg-substituted samples during charge–discharge processes. Moreover, the Na0.6Mn0.99Mg0.01O2 also displays superior sodium-ion full-cell properties when merged with hard carbon anode. Thus, this research may indicate a proper novel thread for designing high-performance composite electrodes.
研究领域:
材料科学
·
电化学
·
储能
·
电池技术
✓ 已验证
DOI
高影响因子
INORGANIC CHEMISTRY
·
2021
·
IF 5.165
Wenhao Xing,Chunlan Tang,Pifu Gong,Jieyun Wu,Zheshuai Lin,Jiyong Yao,Wenlong Yin,Bin Kang
The continuous exploration of multinary chalcogenide semiconductors has provided a variety of new functional materials. In this paper, four new quaternary chalcogenides AHgPS4 (A+ = Na+, K+, Rb+, Cs+) have been prepared by solid-state syntheses. These findings complement the lack of research on this quaternary system. Influenced by the size effect of cations and the coordination mode of Hg, the four compounds crystallize in four different space groups [NaHgPS4, P4̅n2; KHgPS4, Pnn2; RbHgPS4, P21/n; CsHgPS4, P212121] and show an interesting evolution from a 3D framework structure to a 1D chain structure. Moreover, all of these compounds feature noncentrosymmetric (NCS) structures except for RbHgPS4. The materials exhibit wide band gaps of 2.7 eV < Eg < 3.0 eV. The NCS- related second-harmonic-generation (SHG) property of NaHgPS4 and KHgPS4 was also studied. They display strong powder SHG responses (3.14 × AgGaS2 for NaHgPS4; 4.15 × AgGaS2 for KHgPS4), which indicate their intriguing potential as IR nonlinear-optical materials. Moreover, first-principles theoretical calculations were performed to understand the structure–property relationships of these materials.
研究领域:
材料科学
·
无机化学
·
非线性光学
·
固态化学
·
晶体学
✓ 已验证
DOI
高影响因子
Small
·
2024
·Vol. 21
·期 8
·2409041
·
IF 13
Zhijian Huang,Mingpei Tan,Ming Liu,Yukai Hua,Yong Liu
Na 0.67 Ni 0.33 Mn 0.67 O 2 (NNM) is regarded as a promising cathode material for Na-ion batteries (NIBs), but suffers from irreversible phase transformations characterized by multiple voltage plateaus, resulting in poor cycle stability and inferior rate capability. To address these issues, the Na 0.67 Ni 0.18 Cu 0.10 Zn 0.05 Mn 0.67 O 2 (NNCZM) cathode material is synthesized by a cation chelation and reassembly process, which can promote a more uniform element distribution than that prepared by the solid-state method (S-NNCZM), resulting in better Na + diffusion kinetics and rate capability. Replacing Ni 2+ with a small amount of Zn 2+ prevents the P2-O2 phase transformation, while replacing Ni 2+ with an appropriate amount of electrochemically active Cu 2+ eliminates Na-vacancy ordering and additionally contributes to capacity. Thus, the dual substitution of Cu 2+ and Zn 2+ for Ni 2+ makes the NNCZM electrode synergistically achieve a complete solid solution reaction and better cycling stability. Accordingly, it exhibits a large discharge capacity (110.2 mA h g −1 at 10 mA g −1 ) with a high initial coulombic efficiency (97.3%), remarkable cycle stability with 84.1% capacity retention over 200 cycles at 200 mA g −1 , and excellent rate capability with a discharge capacity of 61.0 mA h g −1 at 2000 mA g −1 , significantly outperforming the NNM and S-NNCZM electrodes.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
Energy Storage Materials
·
2020
·
IF 16.28
Dongming Xu,Huanwen Wang,Ruyun Qiu,Qiang Wang,Zhifei Mao,Yingjun Jiang,Rui Wang,Beibei He,Yansheng Gong,Debao Li,Xianluo Hu
Sodium-ion hybrid capacitors (SIHCs) show great promise due to their combination of high energy-storage properties and low cost of Na resources. Yet most anodes in SIHCs suffer from sluggish Na + -diffusion kinetics and relatively low specific capacity, which restrict their widespread development. Herein, bowl-like VS 2 nanosheet arrays are uniformly and robustly anchored on a carbon nanofiber (CNF) substrate through a one-step solvothermal method. The bowl-like VS 2 is featured with an ultrathin thickness (several atomic layers), intrinsically metallic conductivity and an interconnected array architecture. This unique structural design can not only facilitate ultrafast Na + ion-diffusion, but also suppress capacity decay of VS 2 that is caused by the conversion process below 0.3 V. DFT calculations demonstrate a faster Na + transport rate and a lower diffusion energy barrier for the VS 2 /C interface than for the VS 2 /VS 2 bilayer. The quasi-solid-state SIHC full cell that integrates the CNF@VS 2 anode and the graphene sheets-wrapped carbon nanofiber (CNF@GS) cathode, displays prominent energy//power densities in the voltage range of 0.0–4.0 V (116 Wh kg −1 at 0.4 kW kg −1 ; 66 Wh kg −1 at 40 kW kg −1 based on the total mass of both electrodes), outperforming recent SIHCs.
研究领域:
材料科学
·
能源存储
✓ 已验证
DOI
高影响因子
PROGRESS IN SOLID STATE CHEMISTRY
·
2026
·
IF 9.7
Yutong Wang,Hang Zhao,Jiayin Niu,Anurak Weahayee,Wanwisa Limphirat,Theeranun Siritanon,Jingyi Ren,Peng Jiang,Yanfei Sun,Tingting Lu
The development of high-performance narrowband near-infrared second window (NIR-II) phosphors remains a critical challenge in the fields of advanced bioimaging and optical thermometry. Herein, a series of Mn 5+ -doped ABaPO 4 (A = Li, Na, K) phosphors are synthesized via conventional solid-state method, and the effect of A-site alkali metal cations on their crystal structure and luminescence properties is comparatively investigated. Mn K -edge X-ray absorption near-edge structure (XANES) spectroscopy unambiguously confirms that Mn ions are predominantly stabilized in the +5 oxidation state and exclusively occupy tetrahedral [PO 4 ] sites in all three hosts. All samples exhibit characteristic narrowband NIR-II emission in the 1160-1200 nm range originating from the 1 E → 3 A 2 spin-forbidden transition of Mn 5+ . The lattice distortion induced by different A-site cations significantly modulates the doping limit, crystal field strength, thermal stability and temperature sensing performance of Mn 5+ ions. All three Mn 5+ -doped hosts exhibit good thermal stability. The fluorescence decay lifetime of LiBaPO 4 : Mn 5+ reaches 772.436 μs NaBaPO 4 : Mn 5+ shows unique energy level splitting and achieves a maximum relative temperature sensitivity of 2.43% K −1 based on the fluorescence intensity ratio technique. KBaPO 4 : Mn 5+ possesses a highly symmetric crystal lattice and a higher doping limit, with a thermal quenching activation energy ( ΔE ) of 0.414 eV. This work not only provides three promising NIR-II phosphors for bioimaging and optical thermometry, but also offers new insights into the research of Mn 5+ -activated phosphate systems.
✓ 已验证
产品关联
DOI
高影响因子
Mining Metallurgy & Exploration
·
2026
·
IF 2.5
Wang Guangdong,Bai Ziyang,Li Maohui,Mao Xishan,Yu Jie,Su Chang,Hu Wenwen,Ma Bo,Sun Wenzhou,Lu Youjun
In response to the limitations of the traditional acid leaching process in terms of environmental impact and safety, this study developed a ternary mixed acid system (hydrochloric acid - oxalic acid - citric acid) without the use of hydrofluoric acid and nitric acid. The influence of three process parameters, namely, the concentration of the mixed acids, the liquid-solid ratio, the acid leaching temperature, and the acid leaching time, on the removal efficiency of impurities such as Fe, Mn, Al, K, and Na in quartz sand was systematically investigated. The experimental results revealed that the optimal acid leaching conditions were a hydrochloric acid concentration of 4.5 mol·L − 1 , an oxalic acid concentration of 0.03 mol·L − 1 , a citric acid concentration of 0.04 mol·L − 1 , a liquid-solid ratio (mass ratio) of 5:1, a constant temperature of 60 ℃, and a holding time of 3 h. Under these conditions, the removal rates of Fe, Mn, and Al reached 89.2%, 71.0%, and 60.1%, respectively. Moreover, K and Na were also removed to a certain extent, with removal rates of 39.6% and 25.5%, respectively. Mechanistic analysis revealed that in the ternary mixed acid system, hydrochloric acid provides an acidic environment, and the combination of oxalic acid and citric acid synergistically promotes the dissolution of impurities through complexation, reducing impurities on the surface of quartz sand, improving the cleanliness, and forming micro-porous structures. Compared with the traditional hydrogen fluoride-nitric acid leaching process, the fluorine-free ternary mixed acid system proposed in this study has a similar or even better removal efficiency for impurities such as Fe and avoids the environmental and safety risks associated with hydrogen fluoride. This system can achieve the simultaneous removal of various impurities in quartz sand under normal pressure and medium-low-temperature conditions, providing a new technical path for the development of quartz sand purification technology for safety and environmental protection.
✓ 已验证
DOI
高影响因子
CARBON
·
2026
·
IF 12.7
Renlin Zhu,Xiaodong Lv,Chenghui Fu,Xianze Long,Shudong Zhang,Jiayue Xie,Yibo Lin,Qingqing Huang,Zhaohai Chen,Kangning Jiang,Run Huang
Sucrose-derived carbon spheres are promising host materials for cathode sulfur species in Room-Temperature (RT) Na-S batteries. Therefore, the morphology, micro-mesoporous structure, and oxygen-containing functional groups of sucrose-derived nanocarbon spheres were regulated to effectively accommodate sulfur species. This structural design facilitates sulfur confinement, improves charge/ion transport, and enhances the cycling stability of AC@S composites. With increasing activation temperature, the developed porous structure provides more storage sites for active sulfur species; however, excessive activation can reduce the content of oxygen- containing functional groups and weaken the chemical anchoring capability of the carbon framework. Among the prepared samples, AC@S-900 delivered the highest initial capacity of 1323.35 mAh g -1 at 1.0 C, whereas AC@S-750 exhibited superior cycling durability, delivering an initial specific capacity of 941.48 mAh g -1 and maintaining 566.04 mAh g -1 after 1500 cycles, corresponding to an ultralow capacity decay rate of 0.027% per cycle. DFT calculations further suggested that oxygen-containing functional groups can provide polar adsorption/catalytic sites, reduce the conversion energy barriers of Na 2 S x species. Specifically, the carbon framework's carbonyl (C=O) and epoxy (C-O-C) groups can enhance the sulfur redox kinetics. Download: Download high-res image (308KB) Download: Download full-size image
✓ 已验证
产品关联
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Xiaomin Luo,Liyun Cao,Jianfeng Huang,Jiayin Li,Penghui Guo,Yong Wang,Zhanwei Xu,Koji Kajiyoshi
Growing tungsten disulfide (WS 2 ) on self-supporting carbon fiber cloth is an effective means to enhance the sodium storage. However, it is difficult for WS 2 to exhibit high stability and fast reaction kinetics on the surface of carbon fiber cloth. Herein, we construct a composite structure that WS 2 nanosheets are grown on the surface of carbon fiber cloth with many gaps. These gaps are poured by pyrolytic carbon structure. The composite structures expose lateral (0 0 2) crystal plane of WS 2 nanosheets (WS 2 /CFC@C-P). When WS 2 /CFC@C-P is evaluated as an anode material for sodium-ion batteries (SIBs), the exposed (0 0 2) lateral edge realizes the rapid migration of Na + with fast reaction kinetics. Moreover, the poured carbon stabilizes expanded WS 2 nanosheets to maintain original structure. Under the above merits, WS 2 /CFC@C-P could provide high reversible capacity (672 mAh g −1 after 200 cycles at 100 mA g −1 ) and rate capacity (657 mAh g −1 at 0.1 A g −1 and 230 mAh g −1 at 2 A g −1 ). Furthermore, they deliver 297 mAh g −1 after 500 cycles at 2 A g −1 with a low capacity fading of 0.96% per cycle. This work provides a new insight to develop high performance SIBs by introducing the fine regulation of carbon layer.
研究领域:
材料科学
·
电化学
✓ 已验证
DOI
高影响因子
INTERNATIONAL JOURNAL OF HYDROGEN ENERGY
·
2024
·
IF 8.1
Decai Zhu,Jie Yu,Yingbo Zhang,Jiamei Liu,Yuzhao Ouyang,Jiangyu Yu,Zhongqing Liu,Wenliang Fan,Xixi Bai,Nan Wang,Erjun Bu,Chengjun Zhu
The LiNi 0.8 0 Co 0.15 Al 0.05 O 2-δ (LNCA) electrode exhibits better catalytic activity in low-temperature solid oxide fuel cells (LT-SOFCs). However, LNCA still faces some challenges in commercialization due to poor stability, scarcity of lithium resources, and high costs. Here, Na-doped LNCA electrode not only enriches oxygen vacancies and prolongs long-term stability, but also maintains a layered structure and reduces costs. At 550 °C, under the optimal ratio of L 0.85 Na 0.15 NCA electrode, the maximum power density (MPD) of a single cell reaches 1147 mW cm −2 with an open circuit voltage (OCV) of 1.13 V and a polarization impedance (R p ) of 0.21 Ω cm 2 , which is 30.6% higher than the single cell power (878 mW cm −2 ) of the Na-undoped LNCA electrode. The cell maintained long-term stability for 108 h at a constant current density of 156.25 mA cm −2 and a voltage of about 0.9 V. The results indicate that Na-doped LNCA is an effective strategy to improve the electrochemical performance of LNCA and long-term stability of cell.
研究领域:
材料科学
·
电化学
·
能源存储与转换
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）