APPLIED PHYSICS A-MATERIALS SCIENCE & PROCESSING
·
2024
·Vol. 130
·期 11
·835
·
IF 2.5
Kou Chen,Duan Bin,Shi Lichun,Yang Hongcai,Ni Heng,Wang Haiyuan,Ye Qing,Hu Junshan,Hu Shigang
The Sc 3+ ions doped NaYF 4 : Yb 3+ , Er 3+ upconversion (UC) nanoparticles are synthesized by thermal decomposition method. We successfully obtained the upconversion luminescence (UCL) nanoparticles from green emission to red emission through doping Sc 3+ ions with different concentrations. Based on the XRD, the phase change process of Sc 3+ ions doped NaYF 4 nanocrystalline phase were demonstrated. More importantly, through the analysis of UC spectrum data, the change in the phase of the NaY/ScF 4 : Yb 3+ , Er 3+ nanocrystalline corresponds to the change in its luminous properties. It determines that the change of crystal field will lead to the change of luminescence, and then modulate the luminescence. NaScF 4 : Yb 3+ , Er 3+ UC nanoparticles exhibit strong red light emission. In addition, the temperature-sensitive properties of the optimal doping concentration of Sc 3+ ion were tested. The sensitivity of NaYF 4 : Yb 3+ , Er 3+ nanoparticles doped with Sc 3+ ion reached the maximum value of 0.024 K − 1 at 498 K. The nanocrystalline has great application value in the fields of optical temperature measurement, biomedicine, bioprobes and colorful display.
研究领域:
材料科学
·
光学工程
·
生物医学工程
·
纳米技术
·
分子影像学
✓ 已验证
DOI
高影响因子
Desalination and Water Treatment
·
2024
·
IF 1
Zhenyu Wang,Zhu Tu,Lulu Lu,Zefeng Wang,Minghua Yang
The addition of the surfactant can greatly reduce the moisture content of the sludge. But little research has been done on the synthesis of surfactants and the mechanism of dehydration. Thus, a novel cationic surfactant ZWY-28 with higher surface activity and more surface charge was investigating for sludge dewatering in this research. Results showed that when the content of ZWY-28 was 1% (0.14 g/L), the specific resistance to the filtration of sludge had a minimum value of 2.04 × 10 12 m/kg, the moisture content of the dehydrated sludge cake reached a minimum of 78.9%, the bound water reduced to 6.32 g/g, decreased by 39.2%. What’s more, the ZWY-28 is extremely helpful in releasing Extracellular polymers substances from sludge, lead to the removal of bound water, which is the key point of affecting sludge dewatering. The study clearly illustrated that the surfactant ZWY-28 accelerated the dewatering process and could be used as a potential agent for sludge. Meanwhile, it provides ideas for the selection and structure design of surfactants in sludge dewatering.
研究领域:
环境工程
·
胶体与界面化学
·
废水处理
·
污泥处理
✓ 已验证
DOI
高影响因子
JOURNAL OF ELECTROANALYTICAL CHEMISTRY
·
2019
·
IF 3.218
Xiaoxia Ren,Shou-Dong Xu,Shibin Liu,Liang Chen,Ding Zhang,Li Qiu
Biomass wastes or biomass derived hard carbon materials with the advantages of green, as well as economic and high reversible capacity have became the promising anode materials for sodium ion batteries (SIBs). Despite this, the poor rate capability hinders their further development. Here, we synthesized lath-shaped hard carbon materials derived from peanut shells by a two-step approach, namely a hydrothermal pretreatment for different treatment time first, and then a carbonized process at 800 °C. Morphology and structural characterizations (SEM, XRD and Raman) prove the hydrothermal pretreatment has a great influence on morphology transformation, the layer spacing, as well as the defect concentration which can enhance the adsorption sites of Na + and shorten the transport route of sodium ions . The PSDHCs-4 (hydrothermal treatment for 4 h) electrode can deliver the highest reversible capacity of 256 ± 5 mAh g −1 , and show the best capacity retention of 97 ± 2% at the current rate of 0.1 C after 100 cycles. More importantly, PSDHCs-4 electrode shows the excellent rate performances with a reversible capacity of 261, 244, 206, 163, 125, and 100 mAh g −1 at the current rates of 0.1, 0.2, 0.5, 1.0, 2.0 and 5.0 C, respectively. These remarkable electrochemical properties indicate that PSDHCs-4 material should be a promising anode material for SIBs.
研究领域:
材料科学
·
电化学
·
能源存储
·
纳米材料
·
可持续能源
·
碳材料
✓ 已验证
DOI
高影响因子
JOURNAL OF INDUSTRIAL AND ENGINEERING CHEMISTRY
·
2022
·
IF 6.76
Yuan Jin,Xiu Zhang,Tianci Feng,Meisheng Li,Huifang Xiao,Shouyong Zhou,Yijiang Zhao,Jing Zhong,Dawei Yang
Low ion conductivity and poor alkali resistance are still the two major obstacles for the applications of anion exchange membranes (AEMs). In this work, the combined strategies of Carbon quantum dots (CQDs) hybrid and cross-linking modification via side-chains designing were employed to prepare organic–inorganic hybrid AEMs. Then, the cross-linked quaternized polysulfone (CQPSf-CQDs) hybrid AEMs by incorporating carbon quantum dots were successfully fabricated. After hybrid and cross-linking, the mechanical properties of CQPSf-CQDs hybrid AEMs were higher than that of the pristine one, reaching 49.4 MPa for the best one. Meanwhile, the existence of CQDs can expand the hydrophilic area in the membrane, which is beneficial to the transport of O H - . The incorporated CQDs interact weakly with cationic groups in the side chains through hydrogen bonds. The simulation results further demonstrated that the introduction of CQDs was beneficial to the construction of hydrophilic and hydrophobic domains, thereby increasing O H - conductivity. In addition, the prepared hybrid membranes own excellent dimensional stabilities and ion transport performances. These preliminary results give us a lot of hopes for further experiments and optimizations for the hybrid AEMs.
研究领域:
材料科学
·
高分子化学
·
膜科学与技术
·
电化学
·
能源材料
✓ 已验证
DOI
高影响因子
JOURNAL OF PHOTOCHEMISTRY AND PHOTOBIOLOGY A-CHEMISTRY
·
2020
·
IF 3.306
Shengling Li,Duanlin Cao,Xianjiao Meng,Zhiyong Hu,Zhichun Li,Changchun Yuan,Tao Zhou,Xinghua Han,Wenbing Ma
In this study, a novel schiff base fluorescent probe (E)- N' -(3-(benzo[d]thiazol-2-yl)-2-hydroxy-5-methylbenzylidene)-7-(diethylamino)-2-oxo-2 H -chromene-3-carbohydrazide ( CHS ) was synthesized for sequential detection of Al 3+ and pyrophosphate ions (PPi) in a DMSO/HEPES (4:1 v/v, pH = 7.4) buffer system and characterized by 1 H NMR, 13 C NMR, ESI-HR-MS and DFT calculation. Its detection limit was determined to be 0.16 μM for Al 3+ and 0.18 μM for PPi in a pH range of 4∼8, respectively. The Job’ s plot showed that the stoichiometric ratio to Al 3+ was 1:1, and CHS -Al 3+ showed highly selective recognition of PPi. The sensor CHS could also recognize Al 3+ and PPi and exhibited fluorescence enhancement and quenching properties in HeLa cells.
研究领域:
分析化学
·
生物分析
·
分子探针
·
细胞成像
·
金属离子检测
✓ 已验证
DOI
高影响因子
ELECTROCHIMICA ACTA
·
2021
·
IF 6.901
J. LUO,J.X. Liu,F.M. Xiao,L. Huang,W.C. Li,R.H. Tang,Q. Zhou,Y. Wang
In order to restrain the capacity decay of nickel-rich materials for lithium-ion batteries (LIBs) in advanced energy applications, a Ni-rich cathode (LiNi 0.88 Co 0.07 Al 0.05 O 2 , LANCA) with high-rate capability and cycle life was designed and prepared by coating γ-LiAlO 2 and doping Al 3+ on the surface and inside of the secondary particles, respectively. Specifically, the γ-LiAlO 2 -coated and Al 3+ -doped LANCA samples were synthesized by a simple strategy of pre-coating Ni 0.88 Co 0.07 Al 0.05 (OH) 2 , based on aluminum isopropoxide hydrolysis combined with a post-sintering lithiation process. With the γ-LiAlO 2 and Al 3+ , the capacity retention ratio of the cathode is tremendously improved from 61.7 to 83.6% at 1 C rate after 100 cycles. Even at a heavy current density of 10 C for the LANCA cathode, a high reversible capacity of 154.4 mA h g − 1 can be acquired, which amount to the 82.5% capacity retention at 0.2 C. Detailed morphology and structure observation shows that the side reaction at the electrolyte-cathode interface was suppressed, the structural degradation and intergranular cracking were suppressed, while the diffusion of Li + and conductivity were improved. Therefore, this ingenious structural design has certain reference significance for the development and commercialization of high-performance cathode materials for electric power.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
固态化学
✓ 已验证
DOI
高影响因子
Materials Science and Engineering B-Advanced Functional Solid-State Materials
·
2015
·
IF 2.169
Xinghao Lin,Yanming Zhao,Youzhong Dong,Quan Kuang,Zhiyong Liang,Danlin Yan,Xudong Liu
A metaphosphate NaFe(PO 3 ) 3 compound has been obtained by solid state method here. This title compound belongs to the orthorhombic structure with the space group of P 2 1 2 1 2 1 (No. 19) and lattice parameters of a = 14.3390(3) Å, b = 14.3374(2) Å, c = 14.3642(1) Å. Its structure can be described as made up of infinite (PO 3 ) 1− chains connected by FeO 6 octahedra, while the monovalent Na cations are located in the tunnels determined by the connection of PO 4 tetrahedrons and FeO 6 octahedrons. Besides, the morphology, vibrational spectra, magnetic and sodium deinsertion/insertion properties of NaFe(PO 3 ) 3 compound are also presented and discussed here for the first time, which can provide more information about the physicochemical properties of this metaphosphate compound.
研究领域:
无机化学
·
材料科学
·
固体化学
·
电化学
·
能源材料
✓ 已验证
DOI
高影响因子
CHEMICAL ENGINEERING JOURNAL
·
2021
·
IF 13.273
Shiqi Sun,Yanjun Chen,Jun Cheng,Zeyi Tian,Chao Wang,Guangping Wu,Changcheng Liu,Yanzhong Wang,Li Guo
Na 3 V 2 (PO 4 ) 3 (NVP) has gained enormous attentions due to the high capacity and voltage platform. Nevertheless, poor intrinsic electronic conductivities severely restrict the further development. Herein, a feasible strategy to construct unique dimensional gradient structure of the wolfram doped NVP is proposed via a facile sol–gel method. The introduction of W 6+ with the smaller ionic radius parallelized with local V 3+ ions could stabilize the open NASICON structure of NVP and generate vast of beneficial holes to accelerate the electronic transportation. Notably, the wolfram can combine with the superfluous carbon layer and form the new conductive WC phase to further promote the electronic conductivity. Meanwhile, the coated carbon layers and enwrapped CNTs construct an effective conductive framework for accelerated electronic migration. The twining CNTs promote to inhibit the growth of the sintered grains, reducing the particle size to provide shortened pathway for the migration of Na + . Distinctively, the modified Na 2.97 V 2.99 W 0.019 (PO 4 ) 3 /C@CNTs (W0.01-NVP) composite delivers a superior electrochemical performance. Significantly, it can submit a high reversible capability of 112.5 mAh g −1 at 5C with retaining 86% initial capacity over 500 cycles. As for a super high rate of 50C, it reveals an incredible capacity of 92.6 mAh g −1 and remains 84.5 mAh g −1 over 400 cycles, corresponding to a high retention of 91.30%. The superior electrochemical performance is derived from the enhanced crystal structure resulted from wolfram substitution and the beneficial dimensional conductive system consisting of new WC phase, coated carbon layers and enwrapped CNTs.
研究领域:
材料科学
·
电化学
·
能源存储
·
无机化学
·
纳米科技
✓ 已验证
DOI
高影响因子
Journal of Energy Storage
·
2024
·
IF 8.9
Hao Chen,Si-Miao Huang,Dong-Ting Zhang,Min-Peng Li,Chen-Yang Li,Yu-Ping Qiu,Xiao-Rui Wang,Tian-Peng Xu,Mao-Cheng Liu
The self-stacking of MXenes-Ti 3 CN limits the accessibility of nanochannels , reduces the ion diffusion kinetics, and hinders its application in alkali metal ion storage field. This study proposes a point-to-point mortise and tenon joining strategy to fabricate a composite structure of 1,4-phenylenediacetic acid-Ti 3 CN (1,4-PDEA-Ti 3 CN) by grafting rigid and flexible 1,4-phenylenediacetic acid (1,4-PDEA) into the amino-functionalized Ti 3 CN interlayers. The rigid and flexible 1,4-PDEA contributes to a pillar effect in the layered structure of Ti 3 CN, which is benefit to prevent the self-stacking and maintain a stable 2D layered structure. As a result, the interlayer spacing of Ti 3 CN is expanded from 1.20 to 1.46 nm and the Na + diffusion coefficient is improved from 1.16 × 10 −6 to 1.99 × 10 −6 cm 2 s −1 after point-to-point 1,4-PDEA grafting. The 1,4-PDEA-Ti 3 CN achieves a reversible discharge specific capacity of 202.3 mAh g −1 at a current density of 0.1 A g −1 after 770 cycles. Even at a high current density of 5 A g −1 , the 1,4-PDEA-Ti 3 CN still possesses a reversible discharge specific capacity of 137 mAh g −1 and it still maintains the high specific capacity of 256.1 mAh g −1 when the current density comes back to 0.1 A g −1 . This point-to-point mortise and tenon joining strategy provides a novel approach for designing other 2D energy storage materials with long cycle stability and high-rate capability.
研究领域:
材料科学
·
电化学储能
·
纳米材料
·
能源化学
·
二维材料
✓ 已验证
DOI
高影响因子
JOURNAL OF ALLOYS AND COMPOUNDS
·
2021
·
IF 5.316
Tianhang Zhang,Timothy D. Christopher,Saifang Huang,Tilo Söhnel,Yan'gai Liu,Peng Cao
In this work, we co-doped barium (Ba) and zirconium (Zr) in a lithium garnet oxide , to improve its electrochemical properties . In the doping range of y = 0–1.0, the Li 6+y La 3−y Ba y NbZrO 12 (LLBNZO) oxides maintain a cubic crystal structure. A secondary phase of BaZrO 3 emerges when y ≥ 0.75. The ionic conductivity of the developed garnet oxides first increases with Ba-doping in the low doping range and then decreases in the high doping range. It reaches the maximum value in Li 6.5 La 2.5 Ba 0.5 NbZrO 12 when y = 0.5. Cyclic voltammetry shows that the garnet oxides have a wide electrochemical voltage window up to 6 V. The constant-current polarization results on the symmetric cells assembled from Li 6.5 La 2.5 Ba 0.5 NbZrO 12 reveal that this garnet oxide is chemically stable against metallic lithium and has stable cycling performance.
研究领域:
材料科学
·
电化学
·
固态离子学
·
能源材料
·
无机非金属材料
✓ 已验证
DOI
高影响因子
JOURNAL OF POWER SOURCES
·
2017
·
IF 6.395
Yongpeng Cui,Huanlei Wang,Nan Mao,Wenhua Yu,Jing Shi,Minghua Huang,Wei Liu,Shougang Chen,Xin Wang
The increasing demand for supercapacitors with high energy and power density has attracted extensive attention in designing advanced carbon materials with high accessible surface area, hierarchical porosity , and 2D/3D morphology. Here, we report a new approach to tune the morphology and structure of the nanocarbons by using methyl cellulose as the precursor. Due to the varying effect of different activating agents, the interconnected sheet-like carbon with a high surface area of up to 2285 m 2 g −1 and a thickness down to ∼4 nm can be obtained. These important characteristics make the nanocarbons demonstrate a high capacitance of 144 F g −1 at 1 A g −1 and 20 °C, and an excellent capacitance retention ratio of 64% at 100 A g −1 in ionic liquid . Because of the high fraction of meso/macropores for nanocarbons, an outstanding capacitance of 116 F g −1 can be achieved at 0 °C, with a high capacitance retention ratio of 39% at 100 A g −1 . A high energy of 16–17 and 9–10 W h kg −1 can be maintained at 20 and 0 °C when the supercapacitor is charged in less than 1s. The excellent electrochemical response of nanocarbons suggests that the proposed preparation process is promising for developing advanced carbon electrodes.
研究领域:
材料科学
·
电化学
·
纳米科技
·
能源存储
·
功能材料
✓ 已验证
DOI
高影响因子
TALANTA
·
2020
·
IF 5.339
Rui Gao,Dan Li,Siqing Zheng,Haixin Gu,Wei Deng
Accurate and selective in-field detection of metal ions in complex media has gained wide interests due to the complexed matrices and weak affinity towards sensing surface. Herein, we develop a first trimodal method for sensing of Zn 2+ in complex matrices by stimuli-responsive N-[6-piperazinyl-2-pyridinyl]-N-(2-pyridinylmethyl)-2-Pyridinemethanamine dithiocarbamates (DPY) modified gold nanorods (GNRs-DPY). The presence of Zn 2+ triggers the aggregation of GNRs-DPY, leading to increment of color and fluorescence intensity of the sensing system, which could be visually discerned with bare eye. Moreover, the intensive electromagnetic enhancement among “hot spots” of GNRs, generated during self-aggregation of the GNRs-DPY caused by Zn 2+ , lowers the detection limit of SERS assay to 6 × 10 −3 pM. It is noteworthy that GNRs-DPY based sensing platform not only enables distinguishing Zn 2+ from Cd 2+ , with simplicity and rapidity, but also demonstrates as trimodal nanoprobe for sensitive and selective quantitative determination of Zn 2+ in different matrices. Therefore, the GNRs-DPY provides a new strategy for accurate and credible on-spot determination of Zn 2+ in complicated specimens, as well as offering multiple applications in point-of-care monitoring.
研究领域:
分析化学
·
纳米生物技术
·
环境监测
·
分子诊断
·
金属离子传感
✓ 已验证
DOI
高影响因子
危险品化学品经营许可证（带存储）